Patents Assigned to Diamond Shamrock Corporation
  • Cation-exchange resins having cross-linked vinyl aromatic polymer matrix with attached amino alkylene phosphonic acid groups, their use, and preparation
    Patent number: 4002564
    Abstract: Described is an ion exchange resin prepared from a cross-linked vinyl-aromatic polymer carrying recurring active units of the formula --CH.sub.2 NHRPO(OH).sub.2 wherein R is a lower alkylene radical. Such resins are useful in selectively removing metal ions from solutions, and may be prepared, e.g., by reaction of a primary amino-substituted cross-linked copolymer with a phosphorus trihalide and a simple (C.sub.1 -C.sub.3) aldehyde.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: January 11, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: Jack Carbonel, Paul D. A. Grammont, Jean E. E. Herbin
  • .alpha.-Chloroacetanilide selective herbicides
    Patent number: 4001325
    Abstract: Compositions containing an .alpha.-chloroacetanilide compound of the formula ##SPC1##Wherein R.sup.1 is selected from the group consisting of primary and secondary alkyl radicals of 1-3 carbon atoms and R.sup.2 is selected from the group consisting of hydrogen and primary and secondary alkyl radicals of 2-3 carbon atoms, are useful for protecting various agronomic crops from undesirable weed infestation. Presently preferred because of their optimum selective herbicidal activity are those compounds wherein R.sup.1 of the above structure is either methyl or ethyl and R.sup.2 is ethyl.
    Type: Grant
    Filed: November 6, 1973
    Date of Patent: January 4, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: Henry Bluestone, James A. Scozzie, Joseph A. Ignatoski
  • 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
  • Electrolysis cathodes having a melt-sprayed cobalt/zirconium dioxide coating
    Patent number: 3992278
    Abstract: A cathode adapted for the electrolysis of water or an aqueous alkali metal halide salt solutions because it gives prolonged lowering of hydrogen overvoltage is provided by an electrically conductive substrate bearing on its surface a coating of a melt-sprayed admixture of particulate cobalt and particulate zirconia.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: November 16, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Irving Malkin, James R. Brannan
  • Process of making wet strength paper containing mono primary polyamine and organic dihalide modified, epoxidized polyamide
    Patent number: 3992251
    Abstract: Cationic extended terminated polyamide resins are prepared which exhibit highly desirable paper wet strength properties.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: November 16, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Stanley A. Lipowski
  • Production of pinacols in a membrane cell
    Patent number: 3992269
    Abstract: Disclosed is an improved method for the electrochemical production of pinacols from organic carbonyl compounds at high current efficiency in an acid medium in a cell having a hydraulically impermeable cation-exchange membrane. Aqueous organic carbonyl compound and sulfuric acid are introduced to the cathode compartment of the cell along with copper ions in controlled concentrations. After passing an electrolyzing current between the anode and cathode of the cell the pinacol is recovered from the cathode compartment effluent.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: November 16, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Thomas T. Sugano, Barry A. Schenker, Joseph A. Walburg, Nicholas Shuster
  • Metal treating compositions of adjusted pH
    Patent number: 3990920
    Abstract: Metal treating compositions, containing chromic acid and pulverulent zinc, and which find particular utility in the coating of metal substrates prior to painting, now exhibit extended bath stability through pH adjustment. The key to the adjustment is not in the final bath makeup. Rather, the adjustment is made during preparation of a precursor component containing chromic acid. Such component of adjusted pH may then be blended with additional composition ingredients including the pulverulent zinc to form a bath of excellent stability, e.g., extended freedom from gelation.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: November 9, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Jon A. De Ridder, Alexander W. Kennedy, Walter H. Gunn
  • Pretreatment and start-up of electrolytic cell membranes
    Patent number: 3985631
    Abstract: Cation-exchange membranes for use in the electrolysis of alkali metal chloride solutions are treated in order to introduce hydrated alkali metal ions throughout the membrane and are subsequently installed in a cell and subjected to an applied voltage not in excess of about 6.5 to 8.5, passage of current and electrolysis occurring immediately.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: October 12, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Charles J. Hora, Andrew D. Babinsky
  • 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.
  • Large particle size synthetic latex emulsifiers
    Patent number: 3981837
    Abstract: Large particle size synthetic latexes are produced by incorporating novel emulsifiers into the polymerization recipes. These bio-degradable emulsifiers are salts of partially mono-sulfonated mono-alkyl benzenes.
    Type: Grant
    Filed: March 22, 1974
    Date of Patent: September 21, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: John G. Papalos, James S. Lee
  • Dimensionally stable anode and method and apparatus for forming the same
    Patent number: 3981790
    Abstract: The specification and drawings disclose an anode for use in electrolytic cells, as well as a method and apparatus for forming the same. The anode is characterized in that its anode surfaces are formed from two sheets of metal having the same configuration and joined to an anode riser such that all weld joints are symmetrically located relative to the axis of the riser. The disclosed method involves a sequence of clamping all components during welding and maintains the various surfaces planar to eliminate warpage. The disclosed apparatus permits the various steps of the method to be carried out simply and rapidly.
    Type: Grant
    Filed: October 11, 1974
    Date of Patent: September 21, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Richard O. Olson, Gerald R. Pohto
  • Method for dyeing the jute backing of multilevel nylon carpet without staining the nylon face fibers
    Patent number: 3981679
    Abstract: In dyeing the jute backing of carpet having multilevel nylon face fibers with cationic dyes, discernible staining of the face fibers is prevented by dyeing the jute in the presence of a stain-preventing quantity of particular imidazoline salts and imidazoline quaternary salts.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: September 21, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Nick J. Christie, John Karnilaw
  • Nonionic fluorochemical surfactants
    Patent number: 3980715
    Abstract: 6-Hydroxyhexyl perfluoroisopropyl ether is prepared by reaction of hexafluoroacetone and potassium fluoride to obtain an alcoholate which is then reacted with 1-chloro-6-hexanol. One mole of the ether may be reacted with about 1 mole to about 20 moles of ethylene oxide. One mole of 2,2,3,4,4,4-hexafluorobutanol may also be reacted with about 1 mole to about 6 moles of propylene oxide and then about 1 mole to about 20 moles of ethylene oxide. Both ethoxylates are nonionic surfactants which are useful as antistatic agents and lubricants for polymeric shapes such as nylon films and filaments.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: September 14, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Alex J. Szur
  • High-functional polymercaptan resins in epoxy/anhydride resin compositions
    Patent number: 3978151
    Abstract: Liquid, high-functional polymercaptan resins employed typically in sealants and adhesives, show excellent catalytic activity for preparing cured epoxy resin compositions from epoxy/anhydride systems. Blends of the epoxy resin with anhydrides and the high functional polymercaptan resins are adapted for room temperature curing into hard resinous compositions. Such compositions cured at ambient temperature show desirable hardness and achieve other characteristics such as reduced water absorption.
    Type: Grant
    Filed: September 27, 1974
    Date of Patent: August 31, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Douglas H. Strong
  • 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
  • Production of hypochlorite from impure saline solutions
    Patent number: 3974051
    Abstract: The formation of hardness-caused deposits on the cathodic surfaces of cells used in the electrolytic production of hypochlorite from impure saline solutions is reduced and good current efficiencies are realized by employing flat, continuous cathodes having a surface roughness of less than 2.54 .times. 10.sup.-.sup.4 cm. and passing said solution by said cathodes during electrolysis at a velocity of from 0.3 meter/sec. to the number which is equal to the log expressed by the formula: Log velocity (in m/sec/3) = 1.0 - (available Cl.sub.2 concentration, in grams per liter, divided by 4).
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: August 10, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Joseph E. Elliott, Neil W. Stillman, John E. Bennett
  • 2-[2-(5-Nitro-2-furyl)vinyl]-4-(anilino)quinazolines as growth promotants and feed efficiency enhancing agents
    Patent number: 3974277
    Abstract: 2-[2(5-Nitro-2-furyl)vinyl]-4-(anilino)quinazolines and 2-[2-(5-nitro-2-furyl)vinyl]-4-(hydroxyanilino)quinazolines are prepared and used as pesticides and animal growth promotants. These quinazolines also improve the feed efficiency of animals.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: August 10, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Herman Horn, Sheldon B. Greenbaum, Charles M. Ely, Walter Hacke, David A. Olle
  • Yarn sizing process and product
    Patent number: 3974321
    Abstract: Synthetic sizes for use on yarns in water jet looms are prepared by copolymerizing methacrylic acid with from about 3% by weight to about 15% by weight of acrylic acid or vinylethoxytetraethylene glycol as the comonomer. These sizes are useful as nylon warp sizes in water jet looms. They have the desired adhesion to nylon and water resistance plus nonadhesion to steel parts on the loom.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: August 10, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Joseph J. Baron, Jr., Sherman Krefting
  • 2-[2-(5-Nitro-2-furyl)vinyl]-4-(phydroxyanilino)quinazoline as a bactericide
    Patent number: 3973021
    Abstract: 2-[2-(Nitro-2-furyl)vinyl]-4-(anilino)quinazolines and 2-[2-(5-nitro-2-furyl)vinyl]-4-(hydroxyanilino)quinazolines are prepared and used as pesticides and animal growth promotants. These quinazolines also improve the feed efficiency of animals.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: August 3, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Herman Horn, Sheldon B. Greenbaum, Charles M. Ely, Walter Hacke, David A. Olle
  • Oxidation of allylacetone to 2,5-hexanedione in a water-carbon tetrachloride solvent system
    Patent number: 3972942
    Abstract: An economical process is described for the oxidation of allylacetone to 2,5-hexanedione in a solvent system which is a mixture of water and carbon tetrachloride and employing palladium chloride as the oxidation catalyst. High yields of product are obtained with minimal losses of the expensive palladium catalyst.
    Type: Grant
    Filed: April 8, 1974
    Date of Patent: August 3, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Ralph H. Lasco