Patents Assigned to Diamond Shamrock Corporation
  • Preparation of S-chloromethylated O-alkyl substituted phosphodithioic acids
    Patent number: 4264533
    Abstract: A novel and efficient method for preparing S-chloromethyl derivatives of O-alkylphosphorodithioic acids involves reacting the S-hydroxymethyl derivative of such an acid under substantially anhydrous conditions with a suitable acid chloride in a chemically unreactive organic liquid which is a solvent for both said S-hydroxymethyl derivative and said acid chloride. Suitable acid chlorides are PCl.sub.5, PCl.sub.3, acetyl chloride, chlorinated derivatives of acetyl chloride, oxyalyl chloride, phosgene, thionyl chloride, sulfuryl chloride, aryl sulfonyl chlorides and chloro- or nitro-substituted aryl sulfonyl chlorides.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: April 28, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: H. Glenn Corkins, Louis Storace, William W. Brand
  • Method of preparing ketoxime carbamates
    Patent number: 4264528
    Abstract: A novel process of preparing ketoxime carbamate by forming a halogenated intermediate which is reacted with an alkali metal compound and an isocyanate.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: April 28, 1981
    Assignee: Diamond Shamrock Corporation
    Inventor: H. Glenn Corkins
  • Chemical acidogen system for foodstuffs
    Patent number: 4264636
    Abstract: A novel acidogen system containing an aliphatic C.sub.2-6 dione and hydrogen peroxide is used in the production of acidified dairy products, in the production of soybean curd by acidification and in a chemical leavening system for the production of raised bakery products.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: April 28, 1981
    Assignee: Diamond Shamrock Corporation
    Inventor: Fred L. Metz
  • Methionine process
    Patent number: 4259525
    Abstract: Methionine is prepared from 5-(beta-methylmercaptoethyl)-hydantoin at atmospheric pressure by refluxing the hydantoin with a metal hydroxide such as sodium hydroxide, potassium hydroxide, or barium hydroxide and an alkanol having a boiling point of from about 125.degree. C. to about 230.degree. C. at atmospheric pressure, preferably, a water saturated alkanol having a boiling point of from about 125.degree. C. to about 230.degree. C. at atmospheric pressure and thereafter recovering methionine.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: March 31, 1981
    Assignee: Diamond Shamrock Corporation
    Inventor: Kurt H. Schaaf
  • Radiation crosslinked acrylamide polymer compositions and shaped articles therefrom
    Patent number: 4258715
    Abstract: Improved shaped polymeric articles, including ostomy seals, are obtained by radiation crosslinking an acrylamide polymer composition comprising a water-soluble acrylamide polymer plasticized with a quantity of a water-miscible polyol (containing water) that provides a soft, flexible and elastomeric composition.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: March 31, 1981
    Assignee: Diamond Shamrock Corporation
    Inventor: Paul H. Goble
  • Synthetic polymer emulsifier from condensation of naphthalene sulfonic acid, alkyl benzene sulfonic acid and formaldehyde
    Patent number: 4256871
    Abstract: A condensation product of naphthalenesulfonic acid and linear alkyl benzenesulfonic acid having an alkyl moiety of from about 4 to about 20 carbon atoms with formaldehyde or salt thereof is useful as a secondary emulsifier and co-emulsifier in synthetic polymer latex processes. From about 0.05 to about 5 parts by weight of the condensation product per 100 parts by weight of latex monomer is used as a secondary emulsifier and from about 0.5 to about 5 parts by weight of the condensation product per 100 parts by weight of latex monomer is used as a co-emulsifier. Additionally, products can be prepared which have been found to be biodegradable. Use of these condensation products eliminates pollution caused by a secondary emulsifier or co-emulsifier in polymer manufacture effluent.
    Type: Grant
    Filed: April 18, 1979
    Date of Patent: March 17, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: John G. Papalos, Ronald W. Kavchok
  • Anodically polarized surface for biofouling and scale control
    Patent number: 4256556
    Abstract: Biofouling and scale control in conductive aqueous systems is effected on metal, preferably valve metal such as titanium, surfaces on which such fouling normally occurs by applying thereto a stable electrocatalytic coating, anodically polarizing said valve metal coating such that only oxygen is evolved at the surface thereof, preferably at a rate at least about 4.66 millimoles per square meter per hour without evolution of any chlorine.
    Type: Grant
    Filed: November 24, 1978
    Date of Patent: March 17, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: John E. Bennett, Joseph E. Elliott
  • Crosslinked acrylamide polymer compositions and shaped articles therefrom
    Patent number: 4254008
    Abstract: An improved ostomy seal is provided by a crosslinked composition comprising a water-soluble acrylamide polymer, a plasticizing quantity of a water-miscible polyol (containing water) that provides an elastomeric gel, and a crosslinking polyaldehyde.
    Type: Grant
    Filed: September 13, 1979
    Date of Patent: March 3, 1981
    Assignee: Diamond Shamrock Corporation
    Inventor: George Krsek
  • Pharmacologically active substituted 1,2,4-triazines
    Patent number: 4251527
    Abstract: Substituted 1,2,4-triazines, compositions thereof and methods of using same are described. The compounds of the invention exhibit a wide range of pharmacological activity including anti-inflammatory, analgesic, anti-pyretic, hypotensive and central nervous system effects.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: February 17, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: James M. Gullo, William P. Heilman, Robert J. Wayner, Robert E. Moser
  • 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
  • Water soluble polymeric textile treating agent
    Patent number: 4245994
    Abstract: Washfastness of dyed nylon textile material is improved by treating dyed textile material with a water soluble polymeric textile treating agent which is a reaction product of dihydroxy diphenyl sulfone, formaldehyde and naphthalenesulfonic acid and is characterized as a 30% by weight solution in acetone having a reduced viscosity at 21.degree. C. of between about 0.225 and about 0.275.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: January 20, 1981
    Assignee: Diamond Shamrock Corporation
    Inventor: Stanley A. Lipowski
  • Monopolar membrane cell having metal laminate cell body
    Patent number: 4244802
    Abstract: Disclosed is a monopolar membrane cell in which identical anode and cathode pans are stamped from bimetallic laminate material in which an electrolyte resistant material is utilized on the inside of the electrolytic cell and a highly conductive metal is utilized on the outside thereof. This design results in a substantial lowering of the voltage drop due to resistance through the anode and cathode pans of membrane cells.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: January 13, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Gerald R. Pohto, Richard O. Olson
  • Method and electrode with admixed fillers
    Patent number: 4243503
    Abstract: Disclosed is an electrode for use in electrochemical processes wherein a metal substrate made of a valve metal such as titanium carries an electrocatalytically active coating such as an oxide selected from the group consisting of manganese, iron, cobalt, or nickel applied in a series of layers wherein particles of fibers of various filler materials such as titanium, other valve metals, tin oxide, titanium oxides, manganese oxide, quartz, silica, and alumina were admixed with the top coating material.
    Type: Grant
    Filed: August 29, 1978
    Date of Patent: January 6, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Donald F. Lieb, Mary R. Suchanski
  • High bulk density rigid poly(vinyl chloride) resin powder composition and preparation thereof
    Patent number: 4239679
    Abstract: Completely free flow characteristics are provided to a densified rigid poly(vinyl chloride) resin powder composition as prepared in a high shear mixer at an elevated temperature, by withholding at least a portion of the total filler requirement from the composition during the initial mixing cycle, and thereafter adding the remainder of the filler requirement to the composition after it has been cooled to a temperature of 175.degree. F. or less. The total filler requirement of the composition may likewise be added after cooling the blend to 175.degree. F. or less. The resulting rigid resin powder composition exhibits the optimum free flow characteristics required for satisfactory processing in multi-screw extruders.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: December 16, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: James A. Rolls, Kenneth L. Brenis
  • Increasing chloroethylphosphonic acid-induced ethylene response
    Patent number: 4238219
    Abstract: A composition consisting essentially of 2-chloroethylphosphonic acid and certain imides, carbamates, or tetrachloroisophthalonitrile, increases the ability of 2-chloroethylphosphonic acid alone to cause the release of ethylene in plant tissue when applied to same.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: December 9, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: Robert E. Holm, Han San Ku
  • Process for S-chloromethylation of organic dithiophospho compounds with methylene chloride
    Patent number: 4238424
    Abstract: An economical process for the controlled S-chloromethylation of O-alkyl esters of dithiophospho acid compounds with methylene chloride is provided by conducting the reaction in a liquid medium comprising a large excess of methylene chloride and a substantial, reaction promoting proportion of a highly polar, miscible, organic cosolvent.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: December 9, 1980
    Assignee: Diamond Shamrock Corporation
    Inventor: William W. Brand
  • Antihypertensive pyridazin(2H)-3-ones
    Patent number: 4238490
    Abstract: Compounds of the formula ##STR1## are useful antihypertensive agents.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: December 9, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: Larry J. Powers, Zaven S. Ariyan, Russell Buchman, James A. Scozzie, Robert E. Moser, William J. Pyne
  • Oxygen selective anode
    Patent number: 4235697
    Abstract: Novel oxygen selective electrode comprising a coating on said anode consisting of delta manganese dioxide. This outer coating on the anode may be placed on the anode electrochemically by electrolyzing an acid saline solution having dissolved therein sufficient manganous chloride. Sufficient manganese dioxide is plated on said anode when the chlorine evolution essentially ceases during electrolysis.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: November 25, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: John E. Bennett, Joseph E. Elliott
  • Method of preparing ketoxime carbamates
    Patent number: 4234514
    Abstract: A novel process of preparing ketoxime carbamate.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: November 18, 1980
    Assignee: Diamond Shamrock Corporation
    Inventor: Russell Buchman
  • Method for recovery and use of zinc from a leach solution
    Patent number: 4234401
    Abstract: This invention relates to the art of electrowinning and, more particularly, to a process for recovering zinc which is leached from an alloy coating of nickel and zinc which has previously been deposited on cathodes of an electrolytic cell used in the electrolysis of alkali metal halides. Further, a method of utilizing the recovered zinc for control of the zinc content of the nickel-zinc plating solution is disclosed.
    Type: Grant
    Filed: June 22, 1979
    Date of Patent: November 18, 1980
    Assignee: Diamond Shamrock Corporation
    Inventor: James R. Brannan