US 20190177913A1 ( 19) United States (12 ) Patent Application Publication ( 10) Pub . No. : US 2019 /0177913 A1 Basilio et al. (43 ) Pub . Date : Jun . 13 , 2019 (54 ) REMOVAL OF STICKIES IN THE 2) U . S . CI. RECYCLING OF AND CPC ...... D21C 5 /022 ( 2013 .01 ) ; D214 1 /00 (2013 . 01 ); D21H 11/ 14 (2013 .01 ) (71 ) Applicant: Thiele Kaolin Company, Sandersville , GA (US ) (72 ) Inventors : Cesar I. Basilio , Milledgeville , GA (57 ) ABSTRACT (US ) ; Steven W . Sheppard , Sandersville , GA (US ) Removal of stickies from waste paper and paperboard is obtained with the use of a modified kaolin -based stickies (21 ) Appl. No. : 15 /834 , 497 removal composition . The modified kaolin -based stickies ( 22) Filed : Dec . 7, 2017 removal composition is produced by modifying the kaolin clay, separating the modified kaolin clay from the non Publication Classification reactive kaolin clay, and then adding a nonionic surfactant to (51 ) Int. Ci. the modified kaolin -based particles . Removal of stickies is D21C 5 / 02 ( 2006 .01 ) improved by the use of this modified kaolin -based stickies D21H 11/ 14 (2006 . 01) removal composition during the recycling of the waste paper D21 ) 1 /00 ( 2006 . 01 ) and paperboard . US 2019 /0177913 A1 Jun . 13 , 2019

REMOVAL OF STICKIES IN THE ies control in which stickies are removed from the product RECYCLING OF PAPER AND PAPERBOARD would be a superior solution than those presented in the prior art, because such a method would not involve the use of TECHNICAL FIELD additional chemicals, polymers, dispersants or other addi [ 0001] The present invention relates to the removal of tives , at an additional production cost , and would provide a stickies from waste paper and paperboard . In a more specific more comprehensive solution to the paper quality problems aspect , this invention relates to the use of a modified caused by stickies rather than just masking their presence in kaolin -based composition for the removal of stickies from the product. waste paper and paperboard . [ 0005 ] U . S . Pat. No. 6 ,210 , 526 ( to Pohlen ) discloses a method of inhibiting and eliminating stickies from waste BACKGROUND OF THE INVENTION paper through the addition of hydrophobized synthetic or [0002 ] The recovered fiber from waste paper and paper naturalmineral to a waste paper wherein the stickies are board such as old newspaper ( ONP ) , old magazine ( OMG ) , removed together with the and dirt particles during mixed office waste (MOW ), sorted white ledger (SWL ), flotation . The hydrophobized synthetic or natural sorted office paper (SOP ) , and old corrugated (OCC ) mineral is added in the form of a fiber containing slurry . The has become a principal source of raw material for making method disclosed by Pohlen only works in recycling opera paper in the US and Europe , with significant growth in tions that use flotation , which limits its application . For China and other Asian countries . Although the production of example , the recycling of paperboard does not use flotation , recycled and printing paper has been significantly and so the Pohlen method would not be acceptable for reduced in the US and Europe , those of recycled tissue, stickies removal in such operations . brown and paperboard grades have continued to grow . [ 0006 ] U . S . Pat. No. 5 ,540 , 814 ( to Curtis et al. ) describes [ 0003] One of the current issues in is the a method of reducing stickies and removing ink from waste quality of the recovered paper and paperboard . With single paper fiber wherein a cationic kaolin is added to a waste stream recycling being more common now , the quality of the paper fiber under conditions such that the kaolin attaches to recovered paper and paperboard has been getting poorer. It the stickies or the ink and the stickies or ink are then has also resulted in stickies issues being more prevalent in removed using a centrifugal cleaner due to the stickies or ink paper recycling operations. In the paper industry, stickies now having a higher specific gravity . The cationic kaolin is refers to a mixture of organic contaminants used to join the prepared from anionic kaolin and a cationic polymer , such as paper substrate to other materials . This includes adhesives , epicholorohydrin polymer, poly ( dialkyldiallylammonium hot melts , , coating binders , wood , rosins , and wet halide ) , poly ( diallydimethylammonium chloride ) or poly strength resins. The problem of stickies is now a global issue alkylester of a tertiary amine halide . However , the presence that affects recycling all types of paper and paperboard . of cationic polymers significantly affects the wet end part of Stickies deposit on machine surfaces, fabrics , wires , felts . In addition , the presence of cationic polymers and rolls , which leads to machine breaks. These operational in stock preparation where fractionation is used is detrimen problems associated with stickies result in excessive down tal to the separation of the long fiber from the short fiber . times as a result of an increase in maintenance, cleaning , Thus, most paper and paperboard recycling operations avoid replacing equipment, and breaks. The issue with stickies not the use of any material in the recycling operation that only affects the operational side of recycling but the quality contains cationic or anionic polymers . As such , the Curtis of the product itself. On the product side, stickies can cause method also has limited use in certain stickies removal holes, sheet defects , high dirt count, and problems in con operations . verting which all cause an increase in breakages and rejects . [ 0007 ] U . S . Pat. No . 6 ,013 , 157 ( to Li et al. ) discloses a Both problems reduce process efficiency and increase pro chemical deinking agent for controlling froth and reducing duction costs and contribute to a decrease in machine stickies during flotation wherein the deinking agent consists productivity . Thus, there is a strong need to solve the stickies from nonionic surfactant represented by the following for problem . mula : [0004 ] Current stickies control used in industry by its very nature just “ cures the symptoms. ” This approach focuses on R - C6H40 – C2H40 ) m — ( C3H30 )n - ( C4H20 ) — R ! minimizing the effect of the stickies on the and in the final product . Current stickies control methods fatty acid esters of sorbitan , certain alkoxylated fatty acid include passivation , dispersion , fixation , and detackification . esters of sorbitan , polypropylene glycols , and a combination In passivation , the stickies are stabilized through the use of of at least two of the aforesaid materials . However , similar an additive such as talc , bentonite , smectite , and other to the method disclosed by Pohlen , the Limethod is limited minerals as disclosed in U . S . Pat. Nos . 4 , 923 , 566 ; 5 ,798 , to recycling operations that use flotation , and so this method 023 ; 8 ,691 , 052 ; 8 ,840 , 761; and 9 ,017 ,519 . Stickies control would not be acceptable for stickies removal in operations by dispersion is achieved through the use of anionic or that do not involve flotation . nonionic dispersants . In terms of stickies control through [0008 ] U . S . Pat. No. 8 ,043 , 473 (to Yuzawa et al. ) discloses fixation into the fibers , this is typically carried out using a method of making deinked pulp using anhydride of cationic polymers as described in U .S . Pat. No . 7 ,407 , 561 . crystalline layered silicate . This patent claims to improve the For stickies control via detackification , various chemical deinking of waste paper but prevents excessive reduction in compounds, enzymes, and chemically structured minerals as the size of the stickies , resulting in a deinked pulp with disclosed in U . S . Pat. Nos. 4 , 886 ,575 ; 4 , 956 ,051 ; 5 , 080 ,759 ; reduced stickies content. However , the Yuzawa method is 6 ,471 , 826 ; 8 ,048 ,268 ; 8 , 388 ,806 ; 8 , 784 ,606 ; 8 ,784 ,613 ; limited to deinking applications and requires deinking sur 9 ,057 , 155 are generally used . However , a method for stick factants in order to be effective . In addition , this method is US 2019 /0177913 A1 Jun . 13 , 2019 not applicable to the recycling of paperboard . Therefore, the inefficient since most of the stickies are too small to be Yuzawa method is not acceptable for certain stickies removed even by the finest screens . Also , most of the removal operations . stickies such as hot melts are semi- solid at typical operating [0009 ] U . S . Pat . Nos. 8, 052 , 837 and 8 ,815 , 051 (both to temperatures during recycling , so under prior art methods Basilio et al. ) showed that a modified kaolin -based deinking these stickies are able to extrude and pass through holes and reagent developed for use in the flotation deinking of slots together with paper fiber . In the case of conventional recovered paper can improve the removal of , dirts , and centrifugal cleaning, the separation of stickies is based on other contaminants . In the current invention , this technology the difference in the density between the stickies and the has been developed further to produce a modified kaolin paper fiber . The prior art methods of removing stickies by based composition for removing stickies from waste paper centrifugal cleaning are also inefficient since the density of and paperboard which does not suffer from the drawbacks of most stickies is very close to that of fiber. But by collecting prior art methods for stickies removal . and agglomerating the stickies with the modified kaolin [ 0010 ] Moreover, many current methods of stickies based composition of this invention to form bigger particles removal, including those described by the Basilio U . S . Pat. with a higher density, the present invention provides a means Nos. 8 , 052 ,837 and 8 , 815 ,051 , are not suitable for one to make centrifugal cleaning more efficient in removing additional means of stickies removal, that involving a wash stickies. Finally, unlike many of the prior art methods and deinking or “ washing ” process . The washing process is reagents , the modified kaolin - based composition of this particularly useful for the removal of contaminants such as invention is suitable for use with the washing process of water- based inks, fillers , coating particles , fines and micro removing stickies , whereby the pulp is mixed with disper stickies, and is a more efficient process than other contami sants and then dewatered to remove medium and fine nant removal processes particularly for fine paper products stickies. like tissue . Washing involves a process whereby dispersants [0016 ] The current invention is different from the previous are added to the recycled paper/ paperboard pulp , which is inventions disclosed by the present inventors in U . S . Pat . then dewatered or thickened to wash out unwanted (medium Nos. 8 , 052, 837 and 8 , 815 , 051, as well as that disclosed by and fine ) particles . Pohlen ( U . S . Pat . No . 6 ,210 , 526 ) and Li ( U . S . Pat. No . [0011 ] Some of the prior art reagents and methods using 6 ,013 , 157 ) as the present invention is a method of removal same that are described herein , including those described by of contaminants from waste paper that has broader applica Basilio , are not suitable for use in a washing process for bility than those prior art methods which are only useful in contaminant removal because the use of these reagents contaminant removal processes that use flotation . In addi causes excessive foaming, lowering the efficiency of the tion , the present invention differs from the Pohlen method as overall contaminant removal process . It would therefore be the composition of the present invention includes a surfac beneficial to have a composition that is suitable for use in a tant to improve the separation of the stickies from the waste wider range of contaminant removal processes , including paper and paper board while that of Pohlen does not. washing, flotation , and other processes known in the art. [0017 ] The current invention also overcomes the draw backs present in the method disclosed in U .S . Pat . No . SUMMARY OF THE INVENTION 5 ,540 ,814 to Curtis because the presentmethod does not use [0012 ] The present invention provides a modified kaolin the soluble cationic polymers disclosed by Curtis , which based composition for the removal of stickies from waste polymers are detrimental to the separation of long and short paper and paperboard which shows an increased efficiency fibers in the papermaking operation . Specifically , the Curtis of the removal of stickies over existing methods . operation uses anionic kaolin that is treated with water 10013 ]. In the present invention , this modified kaolin - based soluble cationic polymers such as epicholorohydrin poly composition for the removal of stickies is prepared by mer , poly (dialkyldiallylammonium halide ), poly (diallydim dispersing the kaolin clay with chemical dispersants , treat ethylammonium chloride ) or polyalkylester of a tertiary ing the dispersed kaolin particles with modifying reagents , amine halide to form a cationic kaolin . In addition , the and separating the modified particles from the non - reactive modified kaolin particles are separated from the non - reactive particles . Only the particles that are modified are used in this kaolin particle and are hence the only particles used in the invention , unlike the prior art that uses the entire kaolin present composition while the prior art uses all the cationic particles without regard to their properties . The modified kaolin particles . Lastly , the current invention is different kaolin -based particles are then blended with a surfactant to from the prior art in that there is no surfactant added to this produce a stickies removal composition that improves the cationic kaolin composition . separation of the stickies from the waste paper and paper 10018 ] Finally , the present invention overcomes the draw board fibers . backs of the Yuzawa method because the present method [ 0014 ] The modified kaolin -based particles demonstrate does not require deinking surfactants , and is therefore appli enhanced attachment to stickies over prior art methods , cable to a broader range of contaminant removal processes , resulting in improvements in the amount of agglomeration such as the recycling of paperboard . of the stickies together with the modified kaolin - based [0019 ]. These and other objects, features and advantages of particles . This results in increasing the particle size and the this invention will become apparent from the following density of these stickies enabling the more efficient separa detailed description . tion of these stickies from the fibers of the waste paper and paperboard in the fine screening and cleaning operations of DETAILED DESCRIPTION OF THE paper recycling processes . INVENTION [0015 ] The removal of stickies through screening is based [0020 ] The present invention provides a stickies removal on particle size difference between the paper fiber and the composition which comprises a modified kaolin -based com stickies . In prior art methods, screening to remove stickies is ponent and a surfactant. US 2019 /0177913 A1 Jun . 13 , 2019

[0021 ] In accordance with the present invention , the will be separated from the non - reactive mineral components kaolin clay particles are first dispersed into a slurry form and of kaolin . Note that only the reactive mineral components of then mixed with a surface modifying agent to modify the kaolin that have been modified by the modifying reagents surface of the kaolin clay particles . are used to produce the modified kaolin -based component of [0022 ] The surface modifying agents that may be used to this invention . prepare the modified kaolin - based component include (but [0030 ] The hydroxamate agent used in the present inven are not limited to ) hydroxamates , fatty acids, sulfonates, tion is a hydroxamate compound , or a mixture of such amines , siloxanes, silanes , sulfhydryl, and blends of such compounds, having the general formula : agents . The modified kaolin -based particles are then con centrated and separated from the non - reactive kaolin -based particles . R - C - NH [0023 ] Methods of separating the modified particles include flotation and selective flocculation . In the case of o ?? flotation , the modified particles are transferred to a flotation cell and floated . The modified kaolin -based particles after in which R is an alkyl, aryl or alkylaryl group having 4 to separation from the non - reactive kaolin -based material are 28 carbon atoms, and M is hydrogen , an alkali metal or an then mixed with a surfactant to produce a modified kaolin alkaline earth metal. based composition that can be used as a stickies removal [0031 ] Examples of suitable R groups include butyl, agent for improving the removal of stickies during the hexyl, octyl, dodecyl, lauryl, 2 - ethylhexyl, oleyl, eicosyl, various operations of the paper recycling process . phenyl, tolyl, naphtyl and hexylphenyl. [0024 ] Crude kaolin clay generally contains kaolinite and [0032 ] Examples of suitable alkali metals are lithium , other related hydrated aluminum silicate minerals as well as sodium and potassium . quartz , mica , titanium dioxide and iron oxide minerals . [0033 ] Examples of suitable alkaline earth metals are 10025 ) In a preferred embodiment , to produce the modi magnesium , calcium and barium . fied kaolin -based component of this invention , the starting crude kaolin clay is initially dispersed by blunging the clay [0034 ] In this invention , the fatty acid used has the general with water in the presence of a dispersant at dosages ranging formula : from about 1 to about 25 pounds per ton of dry solids . Effective dispersants include sodium silicate , sodium meta R - C - OM silicate , sodium hexametaphosphate , and sodium polyacry late . The preferred dispersant for this invention is sodium silicate using dosages ranging from about 2 to about 16 pounds per ton of dry clay. The pH is adjusted to a range of in which R ' is an alkyl, aryl or alkylaryl group having 1 to about 5 to about 11 , preferably about 7 to about 10 , using a 26 carbon atoms, and M ' is hydrogen , an alkali metal or an pH modifier such as sodium hydroxide , sodium carbonate or alkaline earth metal. ammonium hydroxide . [0035 ] Examples of suitable R ' groups include methyl, [0026 ] The dispersed kaolin clay slurry is then mixed with ethyl, butyl, octyl, lauryl, 2 -ethylhexyl , oleyl , eicoseyl, a surface modifying reagent such as alkyl hydroxamate , fatty phenyl, naphtyl and hexylphenyl. acid , siloxane, silane , or a combination of such reagents . The amount of surface modifying reagent added to the dispersed [0036 ] Examples of suitable alkali metals are lithium , kaolin slurry must be sufficient to surface modify the crude sodium and potassium . kaolin clay. The surface modifying reagents used are in the [0037 ] Examples of suitable alkaline earth metals are range of about 0 . 2 to about 10 pounds per ton of dry clay, magnesium , calcium and barium . preferably about 0 . 5 to about 5 pounds per ton . [0038 ] The siloxanes used in the present invention are [0027 ] After mixing with the surface modifying reagent, organosilane compounds containing a silicon to carbon the kaolin slurry is then transferred to a cell bond . Examples of suitable siloxanes include hexamethyl and , if necessary, diluted to a pulp density preferably within disiloxane , hexamethylytrisiloxane , disiloxane , vinyl the range of about 15 % to about 45 % solids by weight. The beptamethyltrisiloxane , octamethyltrisiloxane, tetramethyl operation of the froth flotation machine is conducted in disiloxane, tetravinyldimethyldisiloxane, conventional fashion . After an appropriate period of opera polydimethylsiloxanes , polymethylhydrosiloxanes , polyeth tion , the surface modified kaolin clay particles are concen ylhydrosiloxanes and polymethylalkylsiloxanes. trated in the froth phase and collected . [0039 ] The silanes used in the present invention are inor [0028 ] In the production of the modified kaolin -based ganic compounds with the general formula : particles for the present invention , the froth flotation process can be conducted either in a mechanical or pneumatic SinH2n + 2 machine . A typical pneumatic machine that can be used is a [0040 ] Examples of suitable silanes are methyltriethoxysi flotation column , while a typical mechanical machine is an lane , octyldimethylchlorosilane ,methyltris (methoxyethoxy ) impeller driven flotation machine . The modified material in silane , octyltrichlorosilane , and phenyltrimethoxysilane . this invention can also be produced by flotation through the [ 0041 ] A nonionic surfactant is then blended with the use of other flotation processes such as dissolved air flota modified kaolin - based particles to produce the modified tion , induced air flotation , bulk oil flotation , skin flotation or kaolin -based composition for removing stickies of this table flotation . invention . The nonionic surfactants used in this invention 10029 ] During the flotation process , the mineral compo can be any of those which is known in the industry for nents of kaolin that are reactive to the modifying reagents similar applications. Examples of suitable surfactants are US 2019 /0177913 A1 Jun . 13 , 2019

fatty acid ethoxylates , fatty alcohol ethoxylates, castor oil then separated from the non - reactive kaolin -based material ethoxylates , polyethylene glycol esters , and polypropylene using the following procedure. glycol esters. [004 ] 2000 dry grams of a crude kaolin clay sample were [0042 ] The inventive composition comprising the modi blunged using a high speed mixer . Blunging of the clay was fied kaolin - based particles , produced as described herein , conducted at 62 % solids using 7 pounds sodium silicate per and a nonionic surfactant may then be used in contaminant ton of dry clay and 1 . 5 pounds sodium hydroxide per ton of removal methods known in the art of waste paper and waste dry clay. The dispersed kaolin clay was then modified with paperboard processing , including centrifugation , flotation , the following reagents : 1 pound alkyl hydroxamate per ton deinking , washing , screening/ fine screening , etc . In these ofdry clay, 1 pound tall oil per ton of dry clay and 0 . 5 pound methods, the inventive composition is added to a pulp or calcium chloride per ton of dry clay as activator for tall oil. slurry comprising waste paper or paperboard including but The treated material was diluted to 25 % solids with water not limited to old newspaper (ONP ) , old magazine (OMG ) , and then transferred to a Denver D - 12 flotation cell. The mixed office waste (MOW ) , sorted white ledger ( SWL ) , slurry was then floated to separate the modified mineral sorted office paper (SOP ) , and old corrugated carton (OCC ) . components in kaolin from the non - reactive mineral com Typically , the waste paper /paperboard slurry is formed from ponents in the kaolin clay . The modified kaolin -based mate mixing waste paper /paperboard materials with a liquid com rial was then collected in the froth phase . This material was prising water and sometimes additional chemicals to assist then dewatered to remove some of the water present in the in breakdown of the starting waste product. The waste paper collected slurry . pulp may further be heated and / or chopped to further aid in [0047 ] The modified kaolin -based material produced in the breakdown of the raw waste material. The inventive Example 1 is used as the modified kaolin -based stickies composition described herein may be added with the liquid removal component, which is then blended with a nonionic to form the pulp /slurry (or may be incorporated therein ) or surfactant to produce the modified kaolin -based stickies may be added after any of the operations described herein , removal agent composition of this invention . i . e . slurry formation , chopping , and /or heating . The waste [ 0048 ) Table 1 shows the differences in the properties of paper pulp and inventive composition mixture may then be the starting kaolin clay , the non - reactive kaolin -based mate subjected to any of the known means of stickies removal rial, the modified kaolin -based stickies removal component described herein , namely centrifugation , flotation , washing , and themodified kaolin - based stickies removal composition . deinking, screening/ fine screening , or the like, but is pref As shown , the modified kaolin -based stickies removal com erably subject to a centrifugation process to remove the ponent and the modified kaolin - based stickies removal com stickies which now have a higher specific gravity due to their position are different from the kaolin clay starting material bond with the inventive kaolin composition described and the non - reactive kaolin -based material in particle size herein . In other preferred embodiments , the waste paper distribution and chemical composition . The modified kaolin pulp and inventive composition mixture is subjected to a based stickies removal component and modified kaolin screening operation where stickies are removed due to their based stickies removal composition have a coarser particle larger size owing to their bond with the inventive kaolin size distribution with fewer particles finer than 2 microns composition described herein . Also as noted above , the compared to the starting kaolin clay and the non - reactive inventive composition has a particular advantage in the kaolin -based material . The chemical composition of the washing process of contaminant removal, in that the inven modified kaolin -based stickies removal component and tive composition does not generate excessive foam during modified kaolin - based stickies removal composition as ana the washing process, and so in other preferred embodiments , lyzed by X - ray fluorescence have lower amounts of alumi the waste paper pulp and inventive composition mixture is num and silicon oxides but higher amounts of titanium and subjected to a washing process. iron oxides compared to the starting kaolin clay and non [ 0043] The inventive composition described herein may reactive material. be used in a concentration of roughly 0 . 2 to 20 pounds of [0049 ] In addition , due to the blunging of the crude kaolin composition per dry ton of waste paper/ paperboard starting clay in the presence of a dispersant such as sodium silicate product, but is preferably used in a concentration of 1 - 5 and its pH adjusted to about pH 5 to 11 with a pH modifier pounds per dry ton of waste paper /paperboard starting such as sodium hydroxide , the resulting modified kaolin product, and most preferably used in a concentration of 1 - 2 based stickies removal component and modified kaolin pounds per dry ton of waste paper /paperboard starting based stickies removal composition are different because the product . dispersants have modified the surface property of kaolin [ 0044 ] The present invention is further illustrated by the which now has the dispersant adsorbed on its surface . The following examples which are illustrative of certain embodi crude kaolin clay does not naturally have these adsorbed ments designed to teach those of ordinary skill in this art dispersant chemicals on its surface . In addition , the modified how to practice this invention and to represent the bestmode kaolin -based stickies removal component and modified contemplated for carrying out this invention . kaolin -based stickies removal composition contain the modifying reagents such as alkyl hydroxamate on their Example 1 surfaces ( see Table 1 ) . These differences allow the modified [ 0045 ] A sample of kaolin clay from Washington County , kaolin -based stickies removal composition to be effective in Ga. was modified and the modified kaolin - based material is removing stickies from waste paper and paperboard . US 2019 /0177913 A1 Jun . 13 , 2019

TABLE 1 Alkyl Particle Size Distribution , % Hydroxamate Passing XRF Chemical Analysis Material Content, ppm 2 um 1 um 0. 5 um 0 .2 um A1, 02 SiOL TIO , Fe2O3 Si/ Al Ratio Kaolin Clay 59 45 29 15 37 . 8 44 . 7 1 . 6 0 . 4 Non -Reactive 61 48 32 14 38 . 8 45 . 6 0 . 3 0 . 3 Kaolin - Based Material Modified 15 28 . 3 31. 1 26 . 4 0 . 9 0 . 93 Kaolin - Based 63 15 6 4 - 28. 3 31. 1 26. 4 0. 9 0. 93 Stickies Removal Component Modified 42 15 6 4 - 28 . 3 31. 1 26 . 4 0 . 9 0 .93 Kaolin - Based Stickies Removal Composition

Example 2 modified kaolin - based stickies removal composition , includ [0050 ] The fine screening test procedure used in this work ing the herein described modified kaolin - based stickies is as follows: removal component with the addition of a nonionic surfac [0051 ] 300 gm of old corrugated ( OCC ) was tant, produced in Example 1, per dry ton ofOCC . The results shredded and then mixed with hot tap water to 5 % solids . of the screening test are presented in Table 2 . The kaolin clay used as the starting material in Example 1 [0056 ] As shown , the starting kaolin clay material, the is added here at the rate of 1 pound ofkaolin clay per dry ton non - reactive kaolin -based material produced from the kaolin of OCC . The sample was pulped for 10 minutes in a clay in Example 1 and the modified kaolin -based stickies laboratory pulper. After pulping , the sample was diluted to removal component produced in Example 1 did not remove 1 % solids and screened using a fine screen having slots of 0 .006 " . After screening , the refuse containing the stickies any stickies . When the nonionic surfactant was added to the was collected and the amount of stickies removed by fine modified kaolin -based stickies removal component to pro screening was measured . For the stickies measurement, the duce the modified kaolin -based stickies removal composi stickies were separated from the fiber using a Pulmac tion , the use of this composition resulted in significant Masterscreen and then quantified using the Transparency stickies removal. Film Lamination method . The Pulmac Sticky Scan 200 was used for the quantification of the stickies amount through TABLE 2 image analysis . The results are given in Table 2 . Amount of [ 0052] In other embodiments , the raw recycled paper Material Used Stickies Removed , product may be shredded and mixed with tap water to a as Stickies Removal Reagent ppm different percentage of solids than that used herein for OCC . Kaolin Clay The percentage solids may be dictated by the application , Non - Reactive Kaolin - Based Material and could be anywhere from 2 to 25 % solids depending on Modified Kaolin - Based Stickies the starting product. Removal Component Modified Kaolin -Based Stickies ExampleExamnia 3 Removal Composition [0053 ] The fine screening test procedure used in Example 2 was repeated on an OCC sample . In Example 3 , 1 pound [0057 ] This invention has been described in detail with of the non -reactive kaolin - based material produced in particular reference to certain embodiments, but variations Example 1 per dry ton of OCC was used instead . The results and modifications can be made without departing from the of the laboratory screening test are presented in Table 2 . spirit and scope of the invention as defined in the following claims. Example 4 [ 0054 ] Another fine screening test was conducted using What is claimed is : the same fine screening test procedures used in Example 2 1 . A composition for removing contaminants from waste on an OCC sample . For this test (Example 4 ) , 1 pound of the paper and waste paperboard , wherein the composition com modified kaolin -based stickies removal component pro prises a nonionic surfactant and a modified kaolin -based duced in Example 1 per dry ton of OCC was used instead . stickies removal component. Table 2 shows the results of the laboratory screening test. 2 . A composition as defined by claim 1 , wherein the nonionic surfactant is selected from a group comprising fatty Example 5 acid ethoxylates , fatty alcohol ethoxylates , castor oil ethoxy [0055 ] The procedure used for the laboratory fine screen lates, polyethylene glycol esters , polypropylene glycol ing test used in Example 2 was repeated using 1 pound of the esters or blends thereof. US 2019 /0177913 A1 Jun . 13 , 2019

3 . A composition as defined by claim 1 , wherein the 10 . The method of claim 9 , wherein said mixture com modified kaolin -based stickies removal component is pro - prises said composition in a concentration of 1 - 2 pounds of duced by a process which comprises: composition per dry ton of waste paper /paperboard in said forming a slurry of dispersed kaolin clay particles; pulp . 11 . The method of claim 5 , wherein said modified kaolin treating the dispersed kaolin clay particles with a modi based stickies removal component is produced by a process fying reagent; and which comprises : separating the modified kaolin -based particles from the forming a slurry of dispersed kaolin clay particles ; non -reactive kaolin -based particles. treating the dispersed kaolin clay particles with a modi 4 . A composition as defined by claim 3 , wherein the fying reagent ; and modifying reagent is selected from a group comprising a separating the modified kaolin -based particles from the fatty acid , hydroxamate , sulfonate , amine , siloxane , silane , non -reactive kaolin -based particles . sulfhydryl, or blends thereof. 12 . The method of claim 11 , wherein the modifying 5 . A method of removing contaminants from waste paper reagent is selected from a group comprising a fatty acid , and waste paperboard , the method comprising : hydroxamate , sulfonate, amine , siloxane , silane, sulfhydryl, or blends thereof . forming a pulp of waste paper or waste paperboard 13 . The method of claim 5 , wherein the nonionic surfac product; tant is selected from a group comprising fatty acid ethoxy adding a composition comprising a nonionic surfactant lates , fatty alcohol ethoxylates, castor oil ethoxylates , poly and a modified kaolin - based stickies removal compo ethylene glycol esters , polypropylene glycol esters or blends nent to said pulp to form a mixture; and thereof. subjecting said mixture to a stickies removal operation . 14 . The method of claim 5 , wherein said pulp is formed 6 . The method of claim 5 , wherein said stickies removal by a process comprising : operation comprises centrifugation . shredding said waste paper or waste paperboard product 7 . The method of claim 5 , wherein said stickies removal to form a shredded waste product; and operation comprises screening . mixing said shredded waste product with hot tap water. 8 . The method of claim 5 , wherein said stickies removal 15 . A waste paper and waste paperboard contaminants operation comprises flotation . removal method utilizing the composition as described in 9 . The method of claim 5 ,wherein said mixture comprises claim 1 . said composition in a concentration of from 0 .2 to 20 pounds 16 . The method of claim 5 , wherein said stickies removal of composition per dry ton of waste paper/ paperboard in said operation comprises washing . pulp . * * * * *