DOCSLIB.ORG

United States Patent (19) (11 3,892,688 Motani Et Al

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
United States Patent (19) (11 3,892,688 Motani Et Al United States Patent (19) (11 3,892,688 Motani et al. (45) July 1, 1975 54) N-THOCARBAMOYL 3,196,107 7/1965 Tomic................................... 20/38 POLYALKYLENEPOLYAMINE GROUP 3,473,921 10/1969 Schmuckler.......................... 75/18 CONTAINING HEAVY METAL ADSORBNG 3,687,908 8/972 Pickleshimer...................... 260/79.5 RESINS OTHER PUBLICATIONS I75 Inventors: Kensuke Motani; Akihiko Nakahara; Nobuyuki Kuramoto, all Campbell et al., J. Polym. Sci. 62, 379-86(1962). of Tokuyama, Japan 73) Assignee: Tokuyama Soda Kabushiki Kaisha, Primary Examiner-Melvin Goldstein Japan Attorney, Agent, or Firm-Sherman & Shalloway (22) Fied: May 30, 1974 21 Appl. No.: 474,723 57) ABSTRACT Related U.S. Application Data (62) Division of Ser. No. 339,382, March 7, 1973, Pat. A heavy metal adsorbing resin of which the main poly No. 3,847,841. mer chain consists of an aliphatic hydrocarbon skele ton and which contains at least one functional group (30) Foreign Application Priority Data selected from amino, polyalkylene polyamino, hy drazido, thioureido, thiosemicarbazido, isothi Mar. 11, 1972 Japan................................ 47-24424 ocyanato, thiobiuret, N-thioaminobiuret, and Mar, l 1, 1972 Japan. ... 47-24.425 N-thiocarbamoyl-polyalkylene amino groups. Heavy Mar. 1, 1972 Japan. ... 47-24426 metals can be removed from a solution containing Mar. 1, 1972 Japan................................ 47-24427 them by contacting the solution with the above heavy metal adsorbing resin. The resin has a markedly high 52 U.S. Cl......... 260/2.2 R; 210/24; 260/79.5 NV; rate of adsorbing the heavy metals, and can be easily 423122; 423/24; 423/49; 423154; 423187; regenerated with a mineral acid or sodium sulfide. The 423/100 suitable time of regenerating or replacing the resin can 51 Int. Cl. C08f 27/02; C08f 27/04 be detected by its color change upon adsorption of the 58) Field of Search.................. 260/2.2 R, 79.5 NV heavy metals. 56 References Cited UNITED STATES PATENTS 2,890, 180 6/1959 Cerny et al.......................... 260/2. 2 Claims, No Drawings 3,892,688 2 N-THIOCARBAMOYL adsorbing ability decreases with the passage of the time POLYALKYLENEPOLYAMINE GROUP of contact with heavy metal containing solutions, re CONTAINING HEAVY METAL ADSORBING sulting in a gradual increase in the concentrations of RESINS the heavy metals remaining in the solutions after 5 contact. This is a division of application Ser. No. 339,382, Since the resin of this invention exhibits a clear dis filed Mar. 7, 1973, now U.S. Pat. No. 3,847,841. coloration upon adsorption of heavy metals, it serves to This invention relates to a resin having the property determine whether the adsorbing ability of the resin has of adsorbing heavy metals. More specifically, it relates reached saturation. Therefore, one can easily see when to a heavy metal adsorbing resin of which the main 10 the resin of this invention should be regenerated or re chain consists of an aliphatic hydrocarbon skeleton and placed, and this adds to the commercial advantage of which contains at least one functional group selected the resin in accordance with the present invention. The from the group consisting of amino, polyalkylene poly resin of this invention can also be used as an expedient amino, hydrazido, thioureido, thiosemicarbazido, iso for detecting the presence of heavy metals in waste wa thiocyanato, thiobiuret, N-thioaminobiruet and N-thi 15 ter. The heavy metal adsorbing resin also lends itself to ocarbamoylpolyalkylene amino groups. easy handling because of its superior mechanical Methods have previously been known to remove strength, and is scarcely broken during its regeneration heavy metals such as mercury from a solution contain or scarcely lost during its production by granulation. ing them by causing an anion exchange resin to adsorb This if, of course, economically advantageous. them. However, these methods are commercially infea The heavy metal adsorbing resin has the advantage of sible because of the defect that not only the exchange being able to be regenerated by treatment with an acid resin has poor ability to adsorb heavy metals, but also after the adsorption of heavy metals to regain its ad the solution treated still contains large quantities of the sorbing ability. heavy metals. The various advantages of the resin over the conven In recent years, methods have been proposed to ad 25 tional chelate resins cannot be ascribed to any clear sorb heavy metals using a chelate resin, but almost all cause. However, we assume that such advantages are of them have not proved satisfactory for industrial ap ascribable to the fact that the main chain of the resin plication. For example, a condensation-type chelate consists of an aliphatic hydrocarbon skeleton (the so resin obtained by reacting thiourea, resorcinol and for called polymerized type high-molecular-weight poly maldehyde is considered best suited for use in such a 30 mer) and the specific functional group bonded thereto method. However, the condensation-type chelate resin synergistically acts to provide a chelating adsorbing has the defect that its ability to adsorb heavy metals is power or other adsorbing power. not entirely satisfactory, its mechanical strength is The base of the heavy metal adsorbing resin of this poor, and it is difficult to regenerate with acid after ad invention may be any of which the main chain consists sorption of heavy metals. 35 of a polymerized-type high-molecular-weight polymer Accordingly, heavy metal adsorbing resins of better having a carbon-to-carbon bond and may be a known quality have been desired in the art. homopolymer, copolymer or graft copolymer. Typical An object of this invention is to provide a resin which examples of such polymers than can be suitably used has a high ability to adsorb heavy metals and high me include polymers of olefins such as polyethylene, poly chanical strength, and which can be easily regenerated. 40 propylene, polybutene, polybutadiene or polyisoprene Another object of this invention is to provide a resin and copolymers of olefins; copolymers of olefins with which distinctly discolors upon adsorption of heavy other copolymerizable monomers such as vinyl chlo metals. ride, vinylidene chloride, an acrylic acid ester or a The othere objects and the advantages of this inven methacrylic acid ester; polymers of unsaturated ali tion will become apparent from the following descrip 45 phatic halogenated hydrocarbons such as vinyl chlo tion. ride, vinylidene chloride, vinylidene chloride or chloro According to this invention, there is provided a heavy prene; copolymers of the aforesaid unsaturated ali metal adsorbing resin of which the main chain consists phatic halogenated hydrocarbons with other copoly of an aliphatic hydrocarbon skeleton and which con merizable monomers such as an olefin, vinyl ester, vinyl tains at least one functional group selected from the 50 ether, acrylonitrile, acrylic acid ester or methacrylic group consisting of amino, polyalkylene polyamino, hy acid ester; polymers of acrylonitrile, acrylic acid esters drazido, thioureido, thiosemicarbazido, thiocyanato, or methacrylic acid esters; polymers of styrene or sty thiobiuret, N-thioaminobiuret, and N-thiocarbamoyl rene derivatives; copolymers of the aforesaid styrene polyalkylene amino groups. monomers with other copolymerizable monomers such The heavy metal adsorbing resin of this invention has 55 as acrylonitrile or a methacrylic acid ester; and graft a markedly high speed of adsorption of heavy metals as copolymers obtained by grafting the aforementioned compared with the conventional chelate resins, and can monomers to rubbery substances such as a polyalkyl adsorb heavy metals almost completely from a solution ene oxide, polybutadiene, ethylene/propylene copoly containing them in low concentrations. Accordingly, mer or ethylene/propylene?diene terpolymer. Espe when the heavy metal adsorbing resin is contacted with 60 cially when a polymer, copolymer or graft copolymer a solution containing heavy metals, the treated solution of the unsaturated aliphatic halogenated hydrocarbon has very low concentrations of the heavy metals, and is used as the resin base, the introduction of the func the concentrations are constant until the resin has ad tional group is easy, and the resulting heavy metal ad sorbed the heavy metals and almost reached saturation. 65 sorbing resin exhibits very superior advantages. Such a characteristic of the heavy metal adsorbing It is essential in the present invention that the main resin of this invention is quite different from that of the chain of the heavy metal adsorbing resin consists of the conventional condensation-type chelate resin whose aliphatic hydrocarbon skeleton, and at least one func 3,892,688 3 4 tional group selected from amino, polyalkylene poly granules is 10 to 300 mesh, preferably 15 to 50 mesh. amino, hydrazido, thioureido, thiosemicarbazido, iso Below are given some examples of reactions that can thiocyanato, thiobiuret, N-thioaminobiuret and be suitably used for producing the heavy metal adsorb N-thiocarbamoyl-polyalkylene polyamino group is di ing resins of this invention. rectly or indirectly attached to the main chain. 5 1. A hypohydrohalous acid salt is reacted in alkali All resins containing the aforementioned functional with a high-molecular-weight polymer (to be referred groups have excellent ability to adsorb heavy metals. to simply as a base polymer) of which the main chain Those containing at least one nitrogen-containing func consists
Load more

Recommended publications
  • ABSTRACT LUISO, SALVATORE. Co/Fe-Doped
    ABSTRACT LUISO, SALVATORE. Co/Fe-doped MoS2 Nanoparticles on Carbon Support as a Catalyst for Hydrogen Evolution Reaction. (Under the direction of Dr. Peter S. Fedkiw). The challenge to replace fossil fuel with clean and renewable energies has led the scientific community to research alternative sources of energy. Because of the low- environmental impact and high-specific energy of hydrogen, interest in sustainable ways of producing it has increased. Water electrolysis is the best method to generate high-purity hydrogen without pollutants, but it is an energy-intensive route. The existing platinum (Pt) catalysts are highly efficient, but the cost and rarity of Pt limits its use. Therefore, seeking high-efficient and cost-effective catalyst for mass production of hydrogen is critical to the utilization of hydrogen energy. In 2005, Nørskov et al. reported that molybdenum disulfide (MoS2) showed good activity for hydrogen evolution reaction (HER). The work in this thesis aims to develop high-efficient molybdenum sulfide catalysts. Molybdenum trisulfide (MoS3) was synthesized from acidification of ammonium tetrathiomolybdate [(NH4)2MoS4] with the addition of sodium sulfide (Na2S∙9H2O) to the reaction mixture. The synthesis parameters such as carbon support, S:Mo atomic ratio, solvent (H2O, ethylene glycol (EG)), dopants (Co/Fe) and pH were systematically studied. The physical and chemical properties of the prepared catalysts were characterized by microscopy (SEM, TEM), x-ray spectroscopy (XPS), and elemental analysis and mapping (ICP, CHNS, STEM). The electrochemical activity toward HER was studied using voltammetry and impedance tests. In the first section of the study, MoS3 nanoparticles were synthesized on three carbon supports (graphene nanoplatelets (GNP), Ketjenblack EJ-300 and Vulcan XC 72R) with various S:Mo atomic ratios (4:1, 5:1, 7:1, 10:1) using H2O and EG as solvents.
    [Show full text]
  • List of Lists
    United States Office of Solid Waste EPA 550-B-10-001 Environmental Protection and Emergency Response May 2010 Agency www.epa.gov/emergencies LIST OF LISTS Consolidated List of Chemicals Subject to the Emergency Planning and Community Right- To-Know Act (EPCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and Section 112(r) of the Clean Air Act • EPCRA Section 302 Extremely Hazardous Substances • CERCLA Hazardous Substances • EPCRA Section 313 Toxic Chemicals • CAA 112(r) Regulated Chemicals For Accidental Release Prevention Office of Emergency Management This page intentionally left blank. TABLE OF CONTENTS Page Introduction................................................................................................................................................ i List of Lists – Conslidated List of Chemicals (by CAS #) Subject to the Emergency Planning and Community Right-to-Know Act (EPCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and Section 112(r) of the Clean Air Act ................................................. 1 Appendix A: Alphabetical Listing of Consolidated List ..................................................................... A-1 Appendix B: Radionuclides Listed Under CERCLA .......................................................................... B-1 Appendix C: RCRA Waste Streams and Unlisted Hazardous Wastes................................................ C-1 This page intentionally left blank. LIST OF LISTS Consolidated List of Chemicals
    [Show full text]
  • Hazardous Waste Management Guidebook
    Hazardous Waste Management Guidebook FOR UNIVERSTIY AT BUFFALO CAMPUS LABORATORIES Prepared By Environment, Health & Safety Services 220 Winspear Avenue Buffalo, NY 14215 Phone: 716-829-3301 Web: www.ehs.buffalo.edu UB EH&S Hazardous Waste Management Guidebook Table of Contents 1.0 PURPOSE ........................................................................................... 3 2.0 SCOPE ............................................................................................... 4 3.0 DEFINITIONS ...................................................................................... 4 4.0 RESPONSIBILITIES ............................................................................... 5 4.1 EH&S ................................................................................................... 5 4.2 Faculty, Staff, and Students ............................................................. 5 5.0 PROCEDURES ....................................................................................... 6 5.1 Hazardous Waste Determination ................................................... 6 5.1.1 Characteristic Hazardous Wastes .......................................... 7 5.1.2 Listed Hazardous Wastes ........................................................ 9 5.2 Satellite Accumulation of Hazardous Waste ............................ 9 5.2.1 Accumulation Areas ............................................................. 10 5.2.2 Requirements for Hazardous Waste Containers ................ 10 5.2.3 Segregation of Hazardous Wastes .....................................
    [Show full text]
  • Technetium Sulfide: Fundamental Chemistry for Waste Storage Form's
    UNLV Theses, Dissertations, Professional Papers, and Capstones 12-1-2014 Technetium Sulfide: undamentalF Chemistry for Waste Storage Form's Application Maryline Ghislaine Ferrier University of Nevada, Las Vegas Follow this and additional works at: https://digitalscholarship.unlv.edu/thesesdissertations Part of the Radiochemistry Commons Repository Citation Ferrier, Maryline Ghislaine, "Technetium Sulfide: undamentalF Chemistry for Waste Storage Form's Application" (2014). UNLV Theses, Dissertations, Professional Papers, and Capstones. 2259. http://dx.doi.org/10.34917/7048578 This Dissertation is protected by copyright and/or related rights. It has been brought to you by Digital Scholarship@UNLV with permission from the rights-holder(s). You are free to use this Dissertation in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/or on the work itself. This Dissertation has been accepted for inclusion in UNLV Theses, Dissertations, Professional Papers, and Capstones by an authorized administrator of Digital Scholarship@UNLV. For more information, please contact [email protected]. TECHNETIUM SULFIDE: FUNDAMENTAL CHEMISTRY FOR WASTE STORAGE FORM’S APPLICATION By Maryline Ferrier Bachelor of Science in Chemistry Institut National des Sciences Appliquées de Rouen, France 2006 Master of Science in Chemistry Institut National
    [Show full text]
  • Exploring Layered Metal Chalcogenides : Electrochemistry and Application
    This document is downloaded from DR‑NTU (https://dr.ntu.edu.sg) Nanyang Technological University, Singapore. Exploring layered metal chalcogenides : electrochemistry and application Chia, Xinyi 2018 Chia, X. (2018). Exploring layered metal chalcogenides : electrochemistry and application. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/102528 https://doi.org/10.32657/10220/47379 Downloaded on 09 Oct 2021 12:42:47 SGT ELECTROCHEMISTRY AND APPLICATION AND ELECTROCHEMISTRY CHALCOGENIDES METAL LAYERED EXPLORING EXPLORING LAYERED METAL CHALCOGENIDES – - ELECTROCHEMISTRY AND APPLICATION CHIA XINYI CHIA XINYI SCHOOL OF PHYSICAL & MATHEMATICAL SCIENCES NANYANG TECHNOLOGICAL UNIVERSITY 2018 2018 EXPLORING LAYERED METAL CHALCOGENIDES – ELECTROCHEMISTRY AND APPLICATION CHIA XINYI School of Physical and Mathematical Sciences A thesis submitted to the Nanyang Technological University in partial fulfillment of the requirement for the degree of Doctor of Philosophy 2018 Acknowledgement My experience in the four years of PhD studies is reminiscent of the themes in my favourite novel – The Alchemist by Paulo Coelho. There is a quote from the novel that rings true for me, “And, when you want something, all the universe conspires in helping you to achieve it.” I thank God, Father of the Universe, for granting me the courage to embark on this PhD course, and also for the strength to see it through. Certainly, the completion of this thesis would not have been possible without the encouragement, kindness and love from the people that He has blessed me with in this four-year journey. My profound gratitude goes to my thesis advisor Professor Martin Pumera for his steadfast support, guidance and dedication. I am very privileged to have a supervisor who brings out my potential and confers many opportunities to explore, learn and grow as a scientist.
    [Show full text]
  • Alternative Energy Generation and Storage
    Volume 10, Number 3 Alternative Energy Generation and Storage Materials for a Greener Tomorrow THIOLATED GOLD NANOCLUSTERS: A NEW CLASS OF PHOTOSENSITIZERS TITANIA NANOTUBES FOR SYNTHESIS AND APPLICATIONS MOLYBDENUM DISULFIDE UNDERSTANDING HYDROGEN EVOLUTION CATALYSIS PERFLUOROSULFONIC ACID MEMBRANES FOR FUEL CELL AND ELECTROLYSER APPLICATIONS OLIVINE-TYPE CATHODE MATERIALS FOR LITHIUM-ION BATTERIES Introduction Welcome to the third issue of Material Matters™ for 2015 focusing on Vol. 10, No. 3 alternative energy generation and storage. Energy is vital for economic and social growth and, traditionally, these have been empowered mostly by the conventional carbon-based fossil fuels. However, it has become apparent Aldrich Materials Science that conventional resources are not limitless and alternative renewable Sigma-Aldrich Co. LLC energy based on solar, wind, and hydrogen are a must to meet future 6000 N. Teutonia Ave. energy demands. Milwaukee, WI 53209, USA The prospect of alternative energy being a viable contributor to the Niraj Singh, Ph.D. To Place Orders global energy needs vastly depends on two factors. First, the efficiency of Aldrich Materials Science Telephone 800-325-3010 (USA) energy generation must increase to render it cost-effective. Second, is the FAX 800-325-5052 (USA) development of high energy density storage systems, as most of the renewable energy sources International customers, contact your local Sigma-Aldrich office are intermittent in nature. Solar energy represents the largest segment of the available non- (sigma-aldrich.com/worldwide-offices). carbon-based energy source, and recently there has been a tremendous effort in harvesting using photovoltaic and photocatalytic techniques. Due to their high energy density storage Customer & Technical Services capacities, lithium-ion batteries have attracted significant attention in recent years.
    [Show full text]
  • Jesse Benck Phd Thesis Final-Augmented.Pdf
    ENGINEERING MOLYBDENUM SULFIDE ELECTROCATALYSTS AND SILICON PHOTOCATHODES FOR HYDROGEN PRODUCTION VIA SOLAR WATER SPLITTING A DISSERTATION SUBMITTED TO THE DEPARTMENT OF CHEMICAL ENGINEERING AND THE COMMITTEE ON GRADUATE STUDIES OF STANFORD UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY JESSE D. BENCK AUGUST 2015 © 2015 by Jesse Daniel Benck. All Rights Reserved. Re-distributed by Stanford University under license with the author. This work is licensed under a Creative Commons Attribution- Noncommercial 3.0 United States License. http://creativecommons.org/licenses/by-nc/3.0/us/ This dissertation is online at: http://purl.stanford.edu/df442wf0767 ii I certify that I have read this dissertation and that, in my opinion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Thomas Jaramillo, Primary Adviser I certify that I have read this dissertation and that, in my opinion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Stacey Bent I certify that I have read this dissertation and that, in my opinion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Bruce Clemens Approved for the Stanford University Committee on Graduate Studies. Patricia J. Gumport, Vice Provost for Graduate Education This signature page was generated electronically upon submission of this dissertation in electronic format. An original signed hard copy of the signature page is on file in University Archives. iii iv Abstract Hydrogen is a critical chemical reagent and energy carrier, but it is currently produced from fossil fuels, which are limited in supply and create harmful CO2 emissions when consumed.
    [Show full text]
  • Separation of Trace Molybdenum from Tungstate Solutions
    Europâisches Patentamt European Patent Office (fi) Publication number: Q 056 71 4 Office européen des brevets B1 EUROPEAN PATENT SPECIFICATION (§) Dateof publication of patent spécification: 15.10.86 ® Intel.4: C 22 B 34/36, C 01 G 41/00 (§) Application number: 82300211.8 ® Dateoffiling: 15.01.82 (54) Séparation of trace molybdenum from tungstate solutions. (D Priority: 19.01.81 US 225915 (73) Proprietor: AMAX INC. Amax Center Greenwich, CT 06836 (US) (§) Date of publication of application: 28.07.82 Bulletin 82/30 (§) Inventor: Hogsett, Robert F. 6971 Pierson Street (§) Publication of the grant of the patent: Arvada Colorado (US) 15.10.86 Bulletin 86/42 Inventor: Huggins, Dale K. 17189 West 57th Place Golden Colorado (US) (84) Designated Contracting States: Inventor: Queneau, Paul B. ATDEFRGBNLSE 1954 Mt. Zion Drive Golden Colorado (US) Inventor: Ziegler, Robert C. (3) References cited: 12410 West Virginia Avenue US-A-2 339 888 Lakewood Colorado (US) US-A-3158438 Inventor: Beckstead, Leo W. US-A-3173 754 8195 Garland Drive US-A-3 256 057 Arvanda Colorado (US) CQ US-A-3 939245 US-A-3 969 484 (74) Representative: Baillie, lain Cameron et al c/o Ladas & Parry Isartorplatz 5 In D-8000 Munchen 2 (DE) co m o 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 CL be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been LU paid.
    [Show full text]
  • Hazardous Chemicals List (All)
    Hazardous Chemicals List (all) Haz Class T=Toxic F=Flam OSHA FED FED FED CA BioAccu R=Reactive C=Corrosive CHEMICAL NAME CASRN Carcinogen LIST U LIST P LIST D Ca EH Organic/Inorganic T (2,4,5-Trichlorophenoxy) Acetic Acid 93-76-5 OSHA Carcinogen T (2,4-Dichlorophenoxy) Acetic Acid 94-75-7 OSHA Carcinogen T [1,1'-Biphenyl]-4,4'-diamine 92-87-5 U021 T [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dichloro- 91-94-1 U073 T [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethoxy- 119-90-4 U091 T [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl- 119-93-7 U095 T 1-(2-Chloroethyl)-3-(4-methylcyclohexyl)-1-nitrosourea 13909-09-6 OSHA Carcinogen T 1-(2-Chloroethyl)-3-cyclohexyl-1-nitrosourea 13010-47-4 OSHA Carcinogen T 1-(o-Chlorophenyl)thiourea 5344-82-1 P026 T 1,1,1,2-Tetrachloroethane 630-20-6 U208 T 1,1,1-Trichloro-2, -bis(p-methoxyphenyl)ethane Ca EH T 1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane 50-29-3 OSHA Carcinogen T,F 1,1,2,2-Tetrachloroethane 79-34-5 OSHA Carcinogen U209 T 1,1,2-Trichloroethane 79-00-5 OSHA Carcinogen U227 1,1a,2,2,3,3a,4,5,5,5a,5b,6-Dodecachlorooctahydro-1,3,4-metheno- Ca EH T 1H-cyclobuta (cd) pentalene, Dechlorane 1,1a,3,3a,4,5,5,5a,5b,6-Decachloro--octahydro-1,2,4-metheno-2H- Ca EH T cyclobuta (cd) pentalen-2-one, Chlorecone T 1,1-Dichloroethane 75-34-3 OSHA Carcinogen T 1,1-Dichloroethylene 75-35-4 U078 D029 T 1,1-Dimethylhydrazine 57-14-7 OSHA Carcinogen U098 Ca EH 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4,4a,5,6,7,8,8a-octahydro- Ca EH T 1,4-endo-endo-5,8-dimethanonaph-thalene T 1,2,3-Propanetriol, trinitrate 55-63-0 P081 T 1,2,3-Trichlorpropane
    [Show full text]
  • Electron Density Distributions Calculated for the Nickel Sulfides Millerite, Vaesite, and Heazlewoodite and Nickel Metal
    21788 J. Phys. Chem. B 2005, 109, 21788-21795 Electron Density Distributions Calculated for the Nickel Sulfides Millerite, Vaesite, and Heazlewoodite and Nickel Metal: A Case for the Importance of Ni-Ni Bond Paths for Electron Transport G. V. Gibbs,*,† R. T. Downs,‡ C. T. Prewitt,‡ K. M. Rosso,§ N. L. Ross,| and D. F. Cox⊥ Departments of Geosciences, Materials Science and Engineering, Chemical Engineering, and Mathematics, Virginia Tech, Blacksburg, Virginia 24061, Department of Geosciences, UniVersity of Arizona, Tucson, Arizona 85721, and William R. Wiley EnVironmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 ReceiVed: July 25, 2005; In Final Form: September 20, 2005 Bond paths and the bond critical point properties (the electron density (F) and the Hessian of F at the bond critical points (bcp’s)) have been calculated for the bonded interactions comprising the nickel sulfide minerals millerite, NiS, vaesite, NiS2, and heazlewoodite, Ni3S2, and Ni metal. The experimental Ni-S bond lengths decrease linearly as the magnitudes of the properties each increases in value. Bond paths exist between the Ni atoms in heazlewoodite and millerite for the Ni-Ni separations that match the shortest separation in Ni metal, an indicator that the Ni atoms are bonded. The bcp properties of the bonded interactions in Ni metal are virtually the same as those in heazlewoodite and millerite. Ni-Ni bond paths are absent in vaesite where the Ni-Ni separations are 60% greater than those in Ni metal. The bcp properties for the Ni-Ni bonded interactions scatter along protractions of the Ni-S bond length-bcp property trends, suggesting that the two bonded interactions have similar characteristics.
    [Show full text]
  • United States Patent Office Patented Apr
    3,129,262 United States Patent Office Patented Apr. 14, 1964 2 The present invention provides an improved method 3,129,262 for converting organic thiocyanates to thiols, and is par REDUCTION OF ORGANIC THOCYANATES ticularly suitable for converting thiocyanophenols to mer Robert S. Lafer, Pittsburgh, Pa., assignor to Consolida captophenols. In accordance with the process of this tion Coal Company, Pittsburgh, Pa., a corporation of invention, organic thiocyanates may be converted to thiols Pennsylvania by reacting the organic thiocyanate with alkali metal No Drawing. Fied Cect. 8, 1962, Ser. No. 229,213 anhydrous liquid ammonia reagent, i.e., a solution con S2 (Caisas. (C. 260-578) sisting of alkali metal as solute dissolved in anhydrous This invention relates to an improved process for con liquid ammonia as solvent. The thiocyanate is dissolved verting organic thiocyanates to thiols. More particularly, 10 in anhydrous liquid ammonia and then reacted with alkali it relates to the preparation of mercaptophenols by the metal, preferably sodium, to form the alkali salt of the reductive cleavage of thiocyanophenols using alkali metal organic mercaptan as well as alkali cyanide. Acidifica and anhydrous liquid ammonia. tion then frees the mercaptain and hydrogen cyanide from The conversion of organic thiocyanates to mercaptains, their alkali salts. This selective cleavage technique is i.e., thiols, by chemical reduction using metal-acid com 15 generally applicable to all organic thiocyanates. Where binations or by catalytic hydrogenation is known. Chem certain reactive groups are present which would be af ical reductions carried out with, e.g., zinc and hydro fected by the sodium-ammonia reagent, such as halogen chloric acid, proceed very slowly; catalytic hydrogenation or nitro groups, these groups will also be removed or using hydrogen in the presence of molybdenum disulfide reduced.
    [Show full text]
  • Naming and Indexing of Chemical Substances for Chemical Abstractstm
    Naming and Indexing of Chemical Substances for Chemical AbstractsTM 2007 Edition A publication of Chemical Abstracts Service Published by the American Chemical Society Naming and Indexing of Chemical Substances for Chemical AbstractsTM A publication of Chemical Abstracts Service Published by the American Chemical Society Copyright © 2008 American Chemical Society All Rights Reserved. Printed in the USA Inquiries concerning editorial content should be sent to: Editorial Office, Chemical Abstracts Service, 2540 Olentangy River Road, P.O. Box 3012, Columbus, Ohio 43210-0012 USA SUBSCRIPTION INFORMATION Questions about CAS products and services should be directed to: United States and Canada: CAS Customer Care Phone: 800-753-4227 (North America) 2540 Olentangy River Road 614-447-3700 (worldwide) P.O. Box 3012 Fax: 614-447-3751 Columbus, Ohio 43210-0012 USA E-mail: [email protected] Japan: JAICI (Japan Association for International Phone: 81-3-5978-3621 Chemical Information) Fax: 81-3-5978-3600 6-25-4 Honkomagome E-mail: [email protected] Bunkyo-ku, Tokyo Japan, 113-0021 Countries not named above: Contact CAS Customer Care, 2540 Olentangy River Road, P.O. Box 3012, Columbus, Ohio 43210-0012 USA; Telephone 614-447-3700; Fax 614-447-3751; E-mail [email protected]. For a list of toll-free numbers from outside North America, visit www.cas.org. 1 Naming and Indexing of Chemical Substances for Chemical Abstracts 2007 ¶ 102 NAMING AND INDEXING OF CHEMICAL SUBSTANCES 101. Foreword. Although the account which follows describes in consid- zwitterions (inner salts, sydnones). The changes for the Fourteenth (1997- erable detail the selection of substance names for Chemical Abstracts (CA) in- 2001) Collective Index period affect coordination nomenclature, stereochemi- dexes, it is not a nomenclature manual.
    [Show full text]