DOCSLIB.ORG

United States Patent (19. 11) Patent Number: 5,089,255 Gaffar Et Al

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
United States Patent (19. 11) Patent Number: 5,089,255 Gaffar Et Al IIIIUS0050892.55A United States Patent (19. 11) Patent Number: 5,089,255 Gaffar et al. 45 Date of Patent: Feb. 18, 1992 DENTAL REMNERALIZATION 4,701,319 10/1987 Woo ...................................... 424/52 (54) 4,806,339 2/1989 Parran et al. ......................... 424/52 75 Inventors: Abdul Gaffar, Princeton; James 4,822,599 4/1989 Mitra .......... ... 424/52 Mellberg, Pottersville; John 4,842,847 6/1989 Amjad ................................... 424/52 Blake-Haskins, Piscataway, all of 4,885,155 12/1989 Parran et al. ......................... 424/52 N.J. FOREIGN PATENT DOCUMENTS (73) Assignee: Colgate-Palmolive Company, 0138705 4/1985 European Pat. Off. Piscataway, N.J. 0251146 1/1988 European Pat. Off. 30776 9/1976 United Kingdom. (21) Appl. No.: 649,208 2204487A 11/1988 United Kingdom . 22 Filed: Jan. 25, 1991 OTHER PUBLICATIONS Vissink et al., C.A.102; 160408s (1985) of Caries Res. Related U.S. Application Data 19(3); 212-218 (1985), "Rehardening properties . on 63 Continuation of Ser. No. 37,145, Jun. 26, 1989, aban Softened Human Enamel Effects of Sorbitol, Xylitol . doned. (51) Int, C. .......................... A61K 7/16; A61K 7/18 Rolla et al., C.A. 108; 8.1860d (1988) of EP251146, Jan. (52) U.S. Cl. ...................................... 424/52; 424/673; 7, 1988. 424/676 Primary Examiner-Shep K. Rose 58) Field of Search .................................... 424/49-58, Attorney, Agent, or Firm-Robert L. Stone; Murray M. 424/673, 676 Grill; Robert C. Sullivan (56) References Cited 57 ABSTRACT U.S. PATENT DOCUMENTS A method is disclosed for remineralizing demineralized 3,932,604 1/1976 Barth ..................................... 424/49 portions of teeth by treatment with a non-astringent 3,970,747 7/1976 Barth. ... 424/52 composition containing about 10-20% xylitol, and at 4,233,288 11/1980 Cornell. ... 424/52 least one fluoride ion-providing compound in a total 4,254,101 3/1981 Denny .. ... 424/52 amount sufficient to provide about 150 ppm to about 4,284,650 8/1981 Goupil ...... ... 424/49 1800 ppm of fluoride ions, with sodium fluoride provid 4,314,990 2/1982 Denny et al. ... 424/52 ing a predominant proportion of such fluoride ions. 4,340,583 7/1982 Wason ............... ... 424/52 4,515,772 5/1985 Parranet al. ..... ... 424/57 4,590,066 5/1986 Parran et al. ......................... 424/52 6 Claims, No Drawings 5,089,255 1 2 non-astringent oral composition in the form of a denti frice or mouthwash containing approximately by DENTAL REMINERALIZATION weight, 10% to 20% of xylitol and at least one fluoride This application is a continuation of application Ser. ion-providing compound in a total amount sufficient to No. 07/371,145, filed June 26, 1989, now abandoned. 5 provide 150 ppm to 1800 ppm, preferably 200 to 1200 ppm, of fluoride ions, with sodium fluoride providing a FIELD OF THE INVENTION predominant proportion of such fluoride ions. The present invention relates to oral compositions in DETAILED DESCRIPTION OF THE the form of dentrifices and mouthwashes providing INVENTION improved remineralization effects. O As indicated above, the compositions employed in BACKGROUND OF THE INVENTION the present invention are non-astringent, i.e. they are In the mouth, there is a natural equilibrium between devoid of zinc salts which introduce problems of mouth hydroxyapatite being dissolved from the enamel of feel and taste and tend to interfere with the desired teeth, on the one hand, and hydroxyapatite being 15 remineralizing mechanism, for example by reacting formed on or in the teeth from substances occurring with, complexing, precipitating or otherwise modifying naturally in the saliva, on the other. This equilibrium is the essential xylitol and sodium fluoride in the presently . shifting continuously. Among other factors, it is deter employed compositions. mined by diet and physical condition. If the equilibrium In the method of the present invention, the defined is such that hydroxyapatite is dissolved, a cariogenic 20 combination of xylitol and fluoride ion-providing com condition arises which is referred to as demineraliza pounds, employed in amounts within the indicated tion. If the equilibrium is such that hydroxyapatite is weight ranges and in relative proportions or ratios pre being formed in demineralized enamel, this is referred determined to achieve optimum remineralization ef. to as remineralization. By remineralization, pre-existing fects, have been unexpectedly found to coact synergisti tooth decay and caries can be reduced or eliminated by 25 cally to yield substantially better remineralization re natural means. sults than those obtainable with compositions contain It has long been known that fluoride-providing com ing the individual xylitol and fluoride ion-providing pounds, even in low concentrations, promote the remin compounds. eralization process and thereby reduce pre-existing cari The fluoride ion-providing compounds optionally ous conditions in the tooth structure. 30 present singly or in any mixtures thereof in the composi Xylitol has been disclosed in patent and literature tions employed in the present invention in addition to publications for the treatment of dental structures to the essential sodium fluoride are well known as anti-car provide sweetened non-cariogenic compositions, con ies agents. They may be fully or at least slightly but trol dental plaque, prophylactic prevention of occur sufficiently water soluble to provide the required fluo rence of carious conditions, and/or remineralization of 35 ride ions, organic or inorganic, and are characterized by pre-existing carious conditions. Barth U.S. Pat, No. their ability to release fluoride ions in water or saliva 3,932,604 and its divisional U.S. Pat. No. 3,970,747, are and by their freedom from undesired reaction with the directed to dentifrices containing substantial amounts of other components of the oral compositions employed xylitol as a non-cariogenic sweetenerahumectant, and herein. discloses formulations also containing sodium mono- 40 Inorganic fluoride ion-providing compounds include fluorophosphate; no remineralizing effect is disclosed. metal, alkali metal, alkaline earth metal and ammonium Hoffman-LaRoche Irish Patent Application 307/76, salts, as for example potassium fluoride, ammonium filed Feb. 16, 1976 and opened to public inspection Sept. bifluoride, calcium fluoride, a copper fluoride such as 1, 1976 (based on Swiss Application 2158/75), discloses cuprous fluoride, barium fluoride, sodium fluorosilicate, oral compositions containing xylitol, but no fluoride, for 45 ammonium fluorosilicate, sodium fluorozirconate, so remineralizing dental caries. EP Publication No. dium monofluorophosphate, aluminum mono- and di 0138705, published in Patent Bulletin 85/17, discloses fluorophosphate, fluorinated sodium calcium pyrophos anti-caries compositions containing xylitol and mixtures phate, stannous fluoride, lithium fluoride, cesium fluo of at least two fluoride salts providing at least 2,000 up ride, aluminum fluoride, cupric fluoride, indium fluo to 20,000 ppm total fluoride ion. EP Publication No. ride, stannous fluorozirconate, ferric fluoride, nickel 0251146, published Jan. 7, 1988 in Patent Bulletin 88/01, fluoride, palladium fluoride, silver fluoride, zirconium discloses oral compositions having a dental plaque pre fluoride, and the like and mixtures thereof. venting, and thus caries-prophylactic, activity contain Organic fluoride ion-providing compounds include ing a synergistic mixture of at least one fluorine com hexylamine hydrofluoride, laurylamine hydrofluoride, pound, at least one zinc ion releasing compound (astrin 55 myristylamine hydrofluoride, decanolamine hydroflu gent), and xylitol. oride, octadecenylamine hydrofluoride, myristoxya It is an object of this invention to provide a new and mine hydrofluoride, diethylaminoethyloctoylamide hy improved method of remineralizing demineralized por drofluoride, diethanolamineoethyloleylamide hydroflu tions of tooth structures. Another object of the inven oride, diethanolaminopropyl-N'-octadecenylamine tion is to provide such a process yielding unexpectedly 60 dihydrofluoride, 1-ethanol-2-hexadecylimidazoline improved remineralization effects. Other objects and dihydrofluoride, octoylethanolamine hydrofluoride, advantages will appear as the description proceeds. octyltrimethylammonium fluoride, dodecylethyldime thylammonium fluoride, tetraethylammonium fluoride, SUMMARY OF THE INVENTON dilauryldimethylammonium fluoride, The attainment of one or more of the above objects is 65 A-'octadecenylbenzyldimethylammonium fluoride, made possible by the present invention which includes a dioctyldiethylammonium fluoride, cyclohexylcetyl method for remineralizing demineralized portions of dimethylammonium fluoride, furfuryllauryldime tooth structures comprising applying to such portions a thylammonium fluoride, phenoxyethylcetyldine 5,089,255 3 4. thylammonium fluoride, N:N'-tetramethyl-N:N:- trademark SYLOID as Syloid 72 and Syloid 74 or dilaurylethylenediammonium difluoride, N-cetyl under the trademark SANTOCEL as Santocel 100 and pyridinium fluoride, N:N-dilauryl-morpholinium fluo alkali metal aluminosilicate complexes are particularly ride, N-myristyl-N-ethylmorpholinium fluoride, N-(oc useful, since they have refractive indices close to the tylaminocarbonylethyl)-N-benzyldimethylammonium refractive indices of gelling agent-liquid (including fluoride, N-(B-hydroxydodecyl)trimethylammonium water and/or humectant) systems commonly used in fluoride, N-phenyl-N-hexadecyldiethylammonium
Load more

Recommended publications
  • Alphabetical Index of Substances and Articles
    ALPHABETICAL INDEX OF SUBSTANCES AND ARTICLES - 355 - NOTES TO THE INDEX 1. This index is an alphabetical list of the substances and articles which are listed in numerical order in the Dangerous Goods List in Chapter 3.2. 2. For the purpose of determining the alphabetical order the following information has been ignored even when it forms part of the proper shipping name: numbers; Greek letters; the abbreviations “sec” and “tert”; and the letters “N” (nitrogen), “n” (normal), “o” (ortho) “m” (meta), “p” (para) and “N.O.S.” (not otherwise specified). 3. The name of a substance or article in block capital letters indicates a proper shipping name. 4. The name of a substance or article in block capital letters followed by the word “see” indicates an alternative proper shipping name or part of a proper shipping name (except for PCBs). 5. An entry in lower case letters followed by the word “see” indicates that the entry is not a proper shipping name; it is a synonym. 6. Where an entry is partly in block capital letters and partly in lower case letters, the latter part is considered not to be part of the proper shipping name. 7. A proper shipping name may be used in the singular or plural, as appropriate, for the purposes of documentation and package marking. - 356 - INDEX Name and description Class UN No. Name and description Class UN No. Accumulators, electric, see 4.3 3292 Acid mixture, nitrating acid, see 8 1796 8 2794 8 2795 Acid mixture, spent, nitrating acid, see 8 1826 8 2800 8 3028 Acraldehyde, inhibited, see 6.1 1092 ACETAL 3 1088
    [Show full text]
  • Hexafluorosilicic Acid
    Sodium Hexafluorosilicate [CASRN 16893-85-9] and Fluorosilicic Acid [CASRN 16961-83-4] Review of Toxicological Literature October 2001 Sodium Hexafluorosilicate [CASRN 16893-85-9] and Fluorosilicic Acid [CASRN 16961-83-4] Review of Toxicological Literature Prepared for Scott Masten, Ph.D. National Institute of Environmental Health Sciences P.O. Box 12233 Research Triangle Park, North Carolina 27709 Contract No. N01-ES-65402 Submitted by Karen E. Haneke, M.S. (Principal Investigator) Bonnie L. Carson, M.S. (Co-Principal Investigator) Integrated Laboratory Systems P.O. Box 13501 Research Triangle Park, North Carolina 27709 October 2001 Toxicological Summary for Sodium Hexafluorosilicate [16893-85-9] and Fluorosilicic Acid [16961-83-4] 10/01 Executive Summary Nomination Sodium hexafluorosilicate and fluorosilicic acid were nominated for toxicological testing based on their widespread use in water fluoridation and concerns that if they are not completely dissociated to silica and fluoride in water that persons drinking fluoridated water may be exposed to compounds that have not been thoroughly tested for toxicity. Nontoxicological Data Analysis and Physical-Chemical Properties Analytical methods for sodium hexafluorosilicate include the lead chlorofluoride method (for total fluorine) and an ion-specific electrode procedure. The percentage of fluorosilicic acid content for water supply service application can be determined by the specific-gravity method and the hydrogen titration method. The American Water Works Association (AWWA) has specified that fluorosilicic acid contain 20 to 30% active ingredient, a maximum of 1% hydrofluoric acid, a maximum of 200 mg/kg heavy metals (as lead), and no amounts of soluble mineral or organic substance capable of causing health effects.
    [Show full text]
  • Economic Commission for Europe Inland Transport
    ECONOMIC COMMISSION FOR EUROPE INLAND TRANSPORT COMMITTEE INF.6 Working Party on the Transport of Dangerous Goods Joint Meeting of the RID Safety Committee and the Working Party on the Transport of Dangerous Goods (Geneva, 1-10 September 2003) Harmonization with the UN Recommendations on the Transport of Dangerous Goods Bulk containers Transmitted by the Government of the United Kingdom 1. Introduction New provisions for bulk containers from the UN Model Regulations are being proposed for inclusion in RID/ADR based on text prepared by the UN Secretariat and as discussed at the ad hoc Working Group on the Harmonization of RID/ADR/ADN with the UN Recommendations on the Transport of Dangerous Goods that met from 26-28 May 2003. The results of the discussions on this subject are recorded in paragraphs 39 to 46 of the report of the ad hoc Working Group TRANS/WP.15/AC.1/2003/56 and the proposed text for inclusion in RID/ADR in the relevant parts of Addendum 1 to 7 of 2003/56, in particular a new chapter 6.11 and a modified chapter 7.3. 2. Proposal and Justification A new chapter 6.11, reflecting UN chapter 6.8, is contained in 2003/56 Add 6 dealing with the requirements for the design, construction, inspection and testing of bulk containers and new UN chapter 4.3 dealing with the use of bulk containers has been integrated into a modified chapter 7.3 contained in 2003/56 Add 7. Now that there are comprehensive provisions for bulk containers developed at UN level, the UK believes as reflected in paragraph 43 of 2003/56, that these should now apply to carriage in bulk in RID/ADR rather than have two separate systems based on the provisions for bulk containers in UN and the existing provisions in RID/ADR.
    [Show full text]
  • Hazardous Substances (Chemicals) Transfer Notice 2006
    16551655 OF THURSDAY, 22 JUNE 2006 WELLINGTON: WEDNESDAY, 28 JUNE 2006 — ISSUE NO. 72 ENVIRONMENTAL RISK MANAGEMENT AUTHORITY HAZARDOUS SUBSTANCES (CHEMICALS) TRANSFER NOTICE 2006 PURSUANT TO THE HAZARDOUS SUBSTANCES AND NEW ORGANISMS ACT 1996 1656 NEW ZEALAND GAZETTE, No. 72 28 JUNE 2006 Hazardous Substances and New Organisms Act 1996 Hazardous Substances (Chemicals) Transfer Notice 2006 Pursuant to section 160A of the Hazardous Substances and New Organisms Act 1996 (in this notice referred to as the Act), the Environmental Risk Management Authority gives the following notice. Contents 1 Title 2 Commencement 3 Interpretation 4 Deemed assessment and approval 5 Deemed hazard classification 6 Application of controls and changes to controls 7 Other obligations and restrictions 8 Exposure limits Schedule 1 List of substances to be transferred Schedule 2 Changes to controls Schedule 3 New controls Schedule 4 Transitional controls ______________________________ 1 Title This notice is the Hazardous Substances (Chemicals) Transfer Notice 2006. 2 Commencement This notice comes into force on 1 July 2006. 3 Interpretation In this notice, unless the context otherwise requires,— (a) words and phrases have the meanings given to them in the Act and in regulations made under the Act; and (b) the following words and phrases have the following meanings: 28 JUNE 2006 NEW ZEALAND GAZETTE, No. 72 1657 manufacture has the meaning given to it in the Act, and for the avoidance of doubt includes formulation of other hazardous substances pesticide includes but
    [Show full text]
  • Improved Methods for Removal of Silicate Deposits T.R. Mccartney, S
    Heat Exchanger Fouling and Cleaning – 2017 IMPROVED METHODS FOR REMOVAL OF SILICATE DEPOSITS 1 1 1 T.R. McCartney , Samar Gharaibeh , Roxanne Shank 1 # 2-321 37 N.E. Calgary, AB, T2E6P6 [email protected]: ABSTRACT The removal of silica scale deposits from process equipment Table 2 : Heat transfer coefficients for various scales represents a substantial challenge in chemical cleaning. Q/A for various Scale types Silicates form in a variety of systems as the result of their presence in natural water and in water treatment chemistry. T1-T2 (°C) The exact nature of the silicate in deposits depends on the Scale K2 20 40 100 type of cations present as well as temperature and flow rates when the silicate is deposited. Removing silicate deposits None 0 270.00 540.00 1350 has depended on using fluorine based acids, such as HF, Glass 0.96 112.21 224.42 561.04 Ammonium bifluoride, and Fluoroboric acid. HF and related Silica 0.06 11.49 22.98 57.45 acids are very hazardous. In addition Fluoride ions form a number of insoluble salts that can limit the effectiveness of Clay 0.15 27.00 54.00 135.00 the acid in dissolving silicate scales. The paper describes the Calcium silicate 0.05 9.64 19.29 48.21 work of developing effective alternative chemistries and how CaCO3 2.4 172.80 345.60 864.00 scale composition variability makes multistage cleaning a necessity. The combination of chelation chemistry with As can be seen in the table the presence of a small amount of caustic has been found to successfully dissolve a variety of insulating scale can reduce the heat transfer by a factor of up silicate species and provide a safer more ecologically friendly to 28 times.
    [Show full text]
  • Dental Remineralization
    iiililiili^ @ EuroPean Patent Office ^-S Office europeen des brevets (fi) Publication number: 0 405 682 B1 (12) EUROPEAN PATENT SPECIFICATION @ Date of publication of patent specification : @ Int. CI.5 : A61K 7/18 23.03.94 Bulletin 94/12 @ Application number: 90201676.5 (22) Date of filing : 25.06.90 (54) Dental remineralization. The file contains technical information (73) Proprietor : Colgate-Palmolive Company submitted after the application was filed and 300 Park Avenue not included in this specification New York, N.Y. 10022-7499 (US) (30) Priority: 26.06.89 US 371145 (72) Inventor : Gaffar, Abdul 89 Carter Road Princetown, New Jersey (US) (43) Date of publication of application Inventor : Mellberg, James R. 02.01.91 Bulletin 91/01 6 Addison Drive Potterville, New Jersey (US) Inventor : Blake-Haskins, John (45) Publication of the grant of the patent : 508 Union Street 23.03.94 Bulletin 94/12 Piscataway, New Jersey (US) @ Designated Contracting States : (74) Representative : Smulders, Theodorus A.H.J., AT BE CH DE DK ES FR GB IT LI LU NL SE Ir. et al Vereenigde Octrooibureaux Nieuwe Parklaan 97 NL-2587 BN 's-Gravenhage (NL) (56) References cited : EP-A- 0 138 705 EP-A- 0 251 146 GB-A- 2 204 487 US-A- 3 932 604 US-A- 3 970 747 CO CM 00 CO IO o Note : Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement.
    [Show full text]
  • Ammonium Fluorosilicate
    10/16/2017 Report | CAMEO Chemicals | NOAA Print Chemical Datasheet AMMONIUM FLUOROSILICATE Chemical Identifiers CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code 16919-19-0 2854 Poison ASL NFPA 704 data unavailable NIOSH Pocket Guide International Chem Safety Card none none General Description A white crystalline solid. Noncombustible. Corrodes aluminum. Used as a disinfectant, in etching glass, metal casting, and electroplating. Hazards Reactivity Alerts Water-Reactive Air-Reactive Air & Water Reactions Water soluble. Fire Hazard Special Hazards of Combustion Products: Toxic and irritating hydrogen fluoride, silicon tetrafluoride, and oxides of nitrogen may form in fires. (USCG, 1999) Health Hazard Inhalation of dust can cause pulmonary irritation and can be fatal in some cases. Ingestion may be fatal. Contact with dust causes irritation of eyes and irritation or ulceration of skin. (USCG, 1999) Reactivity Profile Salts, basic, such as AMMONIUM FLUOROSILICATE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Ammonium fluorosilicate reacts with water to form hydrofluoric acid, a source of fluoride ions. Unlike other halide ions, the https://cameochemicals.noaa.gov/report?key=CH5407 1/4 10/16/2017 Report | CAMEO Chemicals | NOAA fluoride ion is quite reactive, acting as a weak base and participating in some unique reactions.
    [Show full text]
  • BELZONA® PRODUCT DATA Q504 CHEMICAL RESISTANCE of BELZONA® 4131 (Magma-Screed)
    BELZONA® PRODUCT DATA Q504 CHEMICAL RESISTANCE OF BELZONA® 4131 (Magma-Screed) INORGANIC ACIDS RATING RATING Carbonic acid Ex Nitrous acid (20%) Ex Chromic acid (10%) F Oleum (20-65% SO3) P Chromic acid (40%) P Perchloric acid (60%) P Fluorosilicic acid (10%) F Phosphoric acid (10%) F Fluorosilicic acid (30%) P Phosphoric acid (30%) G Hydrobromic acid (10%) Ex Phosphoric acid (85%) P Hydrobromic acid (40%) G Sulfuric acid (10%) Ex Hydrochloric acid (10%) Ex Sulfuric acid (20%) G Hydrochloric acid (36%) G Sulfuric acid (50%) F Hydrofluoric acid (52%) P Sulfuric acid (98%) P Nitric acid (10%) G Sulfuric acid (100%) P Nitric acid (30%) P Sulfurous acid (6%) Ex Nitric acid (65%) P ORGANIC ACIDS RATING RATING Acetic acid (0-10%) G Lactic acid (0-10%) G Acetic acid (10-20%) F Lactic acid (10-85%) P Acetic acid (20-50%) P Maleic acid Ex Acrylic acid P Phenol (80%) P Chlorosulfonic acid F Salicylic acid Ex Citric acid Ex Stearic acid (solid) Ex Cresylic acid P Tannic acid Ex Folic acid Ex Tartaric acid Ex Formic acid (20%) P ALCOHOLS RATING RATING Butanol G Isobutanol G Cellosolve G Methanol P Ethanol F 2-Methoxy ethanol G Ethylene glycol Ex Propylene glycol Ex Glycerol Ex Hexanol Ex Q504 - 1 (Issue 8) The technical data contained herein is based on the results of long term tests carried out in our laboratories and to the best of our knowledge is true and accurate on the date of publication. It is however subject to change without prior notice and the user should contact Belzona to verify the technical data is correct before specifying or ordering.
    [Show full text]
  • Ammonium Bifluoride
    AMMONIUM BIFLUORIDE ALPHA CHEMICALS PTY LTD Chemwatch Hazard Alert Code: 3 Chemwatch: 1727 Issue Date: 27/08/2019 Version No: 7.1.1.1 Print Date: 24/06/2020 Safety Data Sheet according to WHS and ADG requirements S.GHS.AUS.EN SECTION 1 IDENTIFICATION OF THE SUBSTANCE / MIXTURE AND OF THE COMPANY / UNDERTAKING Product Identifier Product name AMMONIUM BIFLUORIDE Chemical Name ammonium bifluoride F2-H5-N; (NH4)-H-F2; N-H5-F2; acid ammonium fluoride; ammonium difluoride; ammonium hydrofluoride; ammonium hydrogen bifluoride; Synonyms ammonium hydrogen difluoride; ammonium hydrogen fluoride; ammonium acid fluoride; ammonium bifluoride, solid; ammonium acid fluoride, solid; 20.882.27,20882-0000, 20882-0010, 20882-0050, 20882-025; Crystalline Ammonium Bifluoride, Proper shipping name AMMONIUM HYDROGENDIFLUORIDE, SOLID Chemical formula F2-H5-N Other means of identification Not Available CAS number 1341-49-7 Relevant identified uses of the substance or mixture and uses advised against In manufacture of magnesium and magnesium alloys; in brightening of aluminium; for purifying and cleansing various parts of beer-dispensing Relevant identified uses apparatus, tubes, etc., sterilizing dairy and other food equipment. In glass and porcelain industries; as mordant for aluminium; as a `sour in laundering cloth. In the laboratory production of hydrogen fluoride. Details of the supplier of the safety data sheet Registered company name ALPHA CHEMICALS PTY LTD Address 4 ALLEN PLACE WETHERILL PARK NSW 2099 Australia Telephone 61 (0)2 9982 4622 Fax Not Available Website ~ Email [email protected] Emergency telephone number Association / Organisation ALPHA CHEMICALS PTY LTD Emergency telephone 61 (0)418 237 771 numbers Other emergency telephone Not Available numbers SECTION 2 HAZARDS IDENTIFICATION Classification of the substance or mixture HAZARDOUS CHEMICAL.
    [Show full text]
  • Conceptual Design of Solid Rocket Motor for Deorbitation and Advances in the Development of an Aluminium-Free Solid Propellant
    Institute of Aviation Warsaw, Poland, since 1926 CONCEPTUAL DESIGN OF SOLID ROCKET MOTOR FOR DEORBITATION AND ADVANCES IN THE DEVELOPMENT OF AN ALUMINIUM-FREE SOLID PROPELLANT ESTEC, Noordwijk, Netherlands, 26th October 2017 Pawel Nowakowski [email protected] Adam Okninski, Michal Pakosz, Damian Rysak, Blazej Marciniak, Anna Kasztankiewicz, Pawel Surmacz, Piotr Wolanski Damian Kaniewski Marek Lipinski, Aleksandra Lenart (Stopa) Bogdan Florczak, Rafał Bogusz Andrzej Matlok, Miroslaw Szczepanik CONCEPTUAL DESIGN OF SOLID ROCKET MOTOR FOR DEORBITATION AND ADVANCES IN THE DEVELOPMENT OF AN ALUMINIUM-FREE SOLID PROPELLANT KEY ISSUES INTRODUCTION . Institute of Aviation . CleanSpace – IoA . Problem definition SRM FOR DEORBITATION . Concept . CleanSat Building Block outcomes . Current work SUMMARY . Challanges . Conclusions 2 2 CONCEPTUAL DESIGN OF SOLID ROCKET MOTOR FOR DEORBITATION AND ADVANCES IN THE DEVELOPMENT OF AN ALUMINIUM-FREE SOLID PROPELLANT . 3 CONCEPTUAL DESIGN OF SOLID ROCKET MOTOR FOR DEORBITATION AND ADVANCES IN THE DEVELOPMENT OF AN ALUMINIUM-FREE SOLID PROPELLANT . 4 CONCEPTUAL DESIGN OF SOLID ROCKET MOTOR FOR DEORBITATION AND ADVANCES IN THE DEVELOPMENT OF AN ALUMINIUM-FREE SOLID PROPELLANT INTRODUCTION • Unresolved problem of space debris • Future impact of mega-constelations • End-of-life disposal Source: ESA (esa.int) • The 25-year rule 5 CONCEPTUAL DESIGN OF SOLID ROCKET MOTOR FOR DEORBITATION AND ADVANCES IN THE DEVELOPMENT OF AN ALUMINIUM-FREE SOLID PROPELLANT ADVANTAGES OF SOLID ROCKET MOTORS FOR DEORBITATION
    [Show full text]
  • United States Patent (19) 11 Patent Number: 4,639,359 Michalski Et Al
    United States Patent (19) 11 Patent Number: 4,639,359 Michalski et al. 45) Date of Patent: Jan. 27, 1987 PROCESS OF REMOVING CATIONC (54) 4,493,820 l/1985 Clausen ............................... 423/310 IMPURITIES FROM WET PROCESS 4,500,502 2/1985 McDonald et al. .............. 423/32 R PHOSPHORIC ACID 4,554,144 ll/1985 Ore .................................. 423/321 R (75) Inventors: Dennis H. Michalski, Lakeland, Fla.; OTHER PUBLICATIONS Viswanathan Srinivasan, Terre Fertilizer Manual, International Fertilizer Development Haute, Ind. Center, United Nations Industrial Development Orga (73) Assignee: International Minerals & Chemical nization, Dec. 1979, pp. 191-193. Corp., Terre Haute, Ind. Primary Examiner-Gregory A. Heller 21) Appl. No.: 809,440 Attorney, Agent, or Firm-Wendell R. Guffey; Thomas L. Farquer 22 Filed: Dec. 16, 1985 57 ABSTRACT (51) Int. Cl." .............................................. C01B 25/16 52) U.S. C. ................................ 423/321 R; 423/158; A method of removing aluminum, magnesium, iron and 423/317; 423/465 other impurities from wet process phosphoric acid is (58) Field of Search ................... 423/321 R, 320, 317, provided. The method comprises partially ammoniating 423/321 S, 158, 465,472 the acid and reacting the acid with a fluoride ion donat ing compound to precipitate aluminum- and magnesi 56) References Cited um-containing ralstonite and ammonium fluorosilicate U.S. PATENT DOCUMENTS which can be easily separated from the acid thereby 3,642,439 2/1972 Moore et al. ................... 423/321 R producing a partially ammoniated wet process phos 4,136,199 1/1979 Mills ................................ 423/321 R phoric acid of reduced impurities content. 4,288,804 11/1981 Parks et al.
    [Show full text]
  • Ammonium Fluoride: Transition Metal Ion Purification
    Ammonium fluoride: transition metal ion purification Litha Yapi April 2017 CVD 800 © University of Pretoria Ammonium fluoride: transition metal ion purification A dissertation submitted in partial fulfillment of the degree Master of Engineering (Chemical Engineering) by Litha Yapi In the Faculty of Engineering, Built Environment, and Information Technology University of Pretoria April 2017 © University of Pretoria Ammonium fluoride: transition metal ion purification Student: Litha Yapi Supervisor: Prof Philip Crouse Co-supervisor: Dr Salmon Lubbe Department of Chemical Engineering Executive Summary The Pelchem NF3 plant produces an ammonium acid fluoride waste stream. The material of construction for the piping and stirrer fabrication in the plant is Monel. As a predominantly nickel-copper alloy, with minute quantities of carbon, manganese, silicon, sulfur and iron, these may leach into process fluids involved. The two biggest constituents of Monel contaminate the ammonium acid fluoride waste stream. Despite being the lesser of the two in terms of the composition of the Monel, copper is higher in concentration than nickel in the waste stream: the solubility of copper (II) cation in ammonium fluoride is higher than that of nickel (II) cation. Additionally, the ammonium acid fluoride is stored in steel barrels because of the relatively high process temperature that preclude the use of polymeric drums. This results in the leaching of iron from the steel drum to the solution. Pelchem expressed an interest in a suitable method of purification of ammonium fluoride, with specific interest of removing nickel (II) cation, copper (II) cation as well as iron (II) cation. The constraints to consider when selecting the appropriate methods are operating costs as well as the capital costs, but the most important factor to consider is the effectiveness of the method in removing the contaminant.
    [Show full text]