Patents Represented by Attorney William A. Skinner

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  • Highly adsorptive macroporous polymers
    Patent number: 4307201
    Abstract: A method for preparing macroporous aminotriazine-aldehyde resins by reaction in the presence of an acid catalyst and a miscible porogen. The resin product has high surface area and porosity and displays excellent sorption capacity.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: December 22, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Richard Won, Robert P. Zajac
  • Perchloroethylene dielectric fluid containing pyrrole and phenol
    Patent number: 4293433
    Abstract: Electrical devices such as transformers and power capacitors are improved by the use of a dielectric fluid prepared by combining perchloroethylene having a low chlorinated ethane content with an antioxidant. This fluid has excellent resistance to decomposition over long periods of time and under severe operational conditions.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: October 6, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Jack A. Borror, Edward A. Rowe, Jr.
  • Process for the preparation of high density anion exchange resins by bromination of crosslinked vinyltoluene copolymers
    Patent number: 4280003
    Abstract: The preparation of anion exchange resins having high density and capacity by bromination of particles of crosslinked vinylaromatic copolymers is described. The process is characterized in that particles of crosslinked vinyltoluene copolymers which have been swollen in a solvent are dibrominated using bromine or a bromine-releasing agent, and the brominated particles are then aminated. The product resins can be used for the extraction of metals, particularly uranium, from solutions such as ore leaching liquor.
    Type: Grant
    Filed: June 15, 1979
    Date of Patent: July 21, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Jean E. E. Herbin, Paul D. A. Grammont
  • Process for bromination of resins based on crosslinked vinylaromatic copolymers
    Patent number: 4246354
    Abstract: This invention relates to a process for the preparation of high density resins by bromination of particles of crosslinked vinylaromatic copolymers of either the gel type or the ionic or non-ionic macroporous type. The invention is characterized in that crosslinked vinylaromatic polymer particles which have been swollen in a solvent are contacted with bromine or a bromine releasing agent in the presence of an oxidizing agent.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: January 20, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Jean E. E. Herbin, Jean de Koker, Patrick J. B. Prsle, Marc S. A. Giuliani, Teddy E. A. Drode, Jacques L. Boutier, Paul D. A. Grammont
  • Process for the chloromethylation of polymers for the production of anionic exchange resins
    Patent number: 4225677
    Abstract: Improved process for the chloromethylation of cross-linked vinylaromatic polymers and copolymers wherein a chlorine generator is incorporated into the reactants and a metallic chloride replaces part or all of the sulfuric acid used in forming the chloromethylating complex. The chloromethylated polymer may be further functionalized to produce an ion-exchange resin.
    Type: Grant
    Filed: January 12, 1979
    Date of Patent: September 30, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: Jacques L. Boutier, Paul D. A. Grammont, Jean E. E. Herbin
  • Resin chelates
    Patent number: 4217417
    Abstract: Complexes of metals with chelating resins are described. In the principal embodiment the complex is a complex of a resin, an enzyme and a metal that is in non-ionic form and that is chelated by the resin and the enzyme. Such material is of particular value for converting dextrin to glucose. In another embodiment a solid agricultural composition is formed comprising a complex of an agriculturally acceptable trace metal chelated by a chelating resin and finely divided solid carrier.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: August 12, 1980
    Assignee: Diamond Shamrock (Polymers) Limited
    Inventor: Robert L. Smith
  • Lightweight silicate aggregate
    Patent number: 4203773
    Abstract: An improved process for the preparation of an expanded, water insoluble silicate aggregate. Anhydrous alkali metal silicate is hydrated in the presence of a curing agent, then is subjected to rapid thermal expansion. The process eliminates the use of liquid silicates, and the reaction is conducted in an essentially dry state. The expanded product has extremely low bulk density.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: May 20, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: Ralph E. Temple, William T. Gooding, Jr.
  • Nitrate selective amidine ion exchange resins
    Patent number: 4134861
    Abstract: Water swellable ion exchange resins comprising a polymeric matrix and amidine groups are described together with their synthesis. The preferred amidine groups are nitrate selective and methods of selectively removing nitrate from water are also described.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: January 16, 1979
    Assignee: Diamond Shamrock (Polymers) Limited
    Inventor: Lubor Roubinek
  • Brine treatment for trace metal removal
    Patent number: 4073706
    Abstract: Process for the removal of trace metals from alkali halide brines. The addition of controlled amounts of magnesium ions to brine and subsequent precipitation of magnesium hydroxide removes metal contaminants, and provides a brine suitable for use in the electrolytic production of chlorine and alkali metal hydroxide.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: February 14, 1978
    Assignee: Diamond Shamrock Corporation
    Inventor: Zoltan Nagy
  • Electrical current breaker for fluid stream
    Patent number: 4032424
    Abstract: An apparatus for interrupting the passage of electrical current along a mixed stream of gas and liquid.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: June 28, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: Edward J. Peters, Wayne P. Zeman
  • Electrolytic production of high purity alkali metal hydroxide
    Patent number: 4025405
    Abstract: Concentrated alkali metal hydroxide substantially free of alkali metal halide and other impurities is produced by the electrolysis of an alkali metal halide solution in an electrolytic cell having a dimensionally stable anode and a metal cathode separated by an electrically conductive stable selectively permeable hydrated cation ion-exchange membrane film of a fluorinated copolymer having pendant sulfonic acid groups or derivatives of such groups. The membrane film is capable of use at high temperatures and under severely corrosive chemical conditions for extended periods without degradation.
    Type: Grant
    Filed: October 21, 1971
    Date of Patent: May 24, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: Ronald L. Dotson, Kevin J. O'Leary
  • Manganese ore reduction
    Patent number: 4010236
    Abstract: A method for reducing the higher oxides of manganese in manganese ore using solid fuel intermixed with an ore bed.
    Type: Grant
    Filed: July 21, 1975
    Date of Patent: March 1, 1977
    Assignee: Diamond Shamrock Corporation
    Inventor: Jay Y. Welsh
  • Preparation of alkali metal cyanates
    Patent number: 4000249
    Abstract: Process for the preparation of alkali metal cyanate by the reaction of urea and alkali metal carbonate. The addition of water to the reaction in an intermediate step activates partially blocked alkali metal carbonate and provides an alkali metal cyanate product of high purity.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: December 28, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Irving Sochol, Jay Y. Welsh
  • Membrane electrolytic cell with concentric electrodes
    Patent number: 3984303
    Abstract: Electrolytic cell in which hollow cylindrical electrodes are arranged concentrically, anode within the cathode, and having a tubular ion permeable membrane supported on the outside of the anode separating the anolyte and the catholyte. The anolyte is contained within the membrane-anode structure, affording reduced construction cost and greater efficiency per unit of cell volume.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: October 5, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Edward J. Peters, J. Edward Loeffler, Jr.
  • Prevention of hydrochlorination
    Patent number: 3976705
    Abstract: A method for preventing the undesired hydrochlorination of unsaturated hydrocarbons and chlorohydrocarbons in the presence of aluminum chloride involves the addition of a material capable of preferentially inactivating the ability of the AlCl.sub.3 to catalyze hydrochlorination.
    Type: Grant
    Filed: June 25, 1969
    Date of Patent: August 24, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: James J. Lukes, Norman L. Beckers, Jack A. Borror
  • Self setting molding process
    Patent number: 3970462
    Abstract: Self setting molds for metal casting are produced using a liquid alkali metal silicate as the binder and a product obtained by reaction of three moles of glycerin and one mole of glacial acetic acid as the catalyst for the binder.
    Type: Grant
    Filed: February 25, 1974
    Date of Patent: July 20, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Neil W. Stillman
  • Stabilization of methyl chloroform
    Patent number: 3957893
    Abstract: The tendency for methyl chloroform to decompose in the presence of metals, particularly aluminum, is inhibited by a stabilizer mixture comprising an epoxide, a nitroalkane and either propylene glycol mono-methyl ether, dioxepane or a mixture thereof.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: May 18, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Norman L. Beckers, Edward A. Rowe
  • Preparation of manganous hydroxide
    Patent number: 3950505
    Abstract: Manganous oxide is converted directly to manganous hydroxide by hydration in the presence of a catalyst. The product has high purity and reactivity.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: April 13, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Irving Sochol
  • Stabilized methyl chloroform
    Patent number: 3935287
    Abstract: The tendency for methyl chloroform to decompose in the presence of metals, particularly aluminum, is inhibited by a stabilizer mixture comprising an epoxide, a nitroalkane, trioxane and either propylene glycol mono-methyl ether, dioxepane or a mixture thereof.
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: January 27, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Norman L. Beckers, Edward A. Rowe
  • Addition of alloying constituents to aluminum
    Patent number: 3935004
    Abstract: Metals are alloyed into aluminum using a solid compact comprised of particles containing a high concentration of the metal to be added. The compacts are prepared by blending finely divided particles of the metal containing material with a salt fluxing agent, then compacting the mixture into a readily useable form such as a pellet. The resultant pellet provides rapid dissolution of the alloying constituent in the aluminum whether cold charged to the furnace or added to a molten bath over a wide range of bath temperatures.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: January 27, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: John Porter Faunce