Patents Assigned to Texaco Chemical Company
  • Dehydration of propylene oxide by extracting distillation
    Patent number: 5145563
    Abstract: An extractive distillation agent consisting essentially of glycerol-1,3-di-t-butylether is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide, and a heavier bottoms distillation fraction containing substantially all of the glycerol-1,3-di-t-butylether and water introduced into the distillation column.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: September 8, 1992
    Assignee: Texaco Chemical Company
    Inventors: William K. Culbreth, III, David G. Pottratz, Wei-Yang Su, Yu-Hwa E. Sheu, Carter G. Naylor
  • Process for oligomerizing olefins to prepare synthetic lubricant base stocks having improved properties
    Patent number: 5146023
    Abstract: A process is disclosed for preparing synthetic lubricant base stocks having improved properties. Synthetic lubricant base stocks may be prepared in good yield by oligomerizing linear olefins using certain acidic calcium montmorillonite clay catalysts. When a mixture of alpha and internal-olefins having up to 50 wt. % internal-olefin is used, and the oligomers prepared therefrom are hydrogenated, a synthetic lubricant base stock having a higher viscosity index and a lower pour point is prepared.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: September 8, 1992
    Assignee: Texaco Chemical Company
    Inventors: John R. Sanderson, Edward T. Marquis
  • Method of separating isobutylene from a C-4 hydrocarbon fraction using montmorillonite catalysts
    Patent number: 5146041
    Abstract: Disclosed is a two-step method for separating isobutylene from a C-4 hydrocarbon fraction comprising:a) Reacting the C-4 fraction with a glycol in the presence of an acidic montmorillonite catalyst at a temperature of about 60.degree. to 160.degree. C. to yield the corresponding glycol mono-t-butyl ether, and subsequentlyb) reacting the intermediate glycol ether product over the same class of catalyst at a temperature of about 100.degree. to 220.degree. C. to regenerate the isolatable isobutylene.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: September 8, 1992
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Process for oligomerizing olefins using halogen-free titanium salts or halogen-free zirconium salts on clays
    Patent number: 5146030
    Abstract: An improved process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks are prepared in good yield by oligomerizing linear olefins using cation-exchangeable layered clays that have been treated with a non-halogenated titanium salt or non-halogenated zirconium salt.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: September 8, 1992
    Assignee: Texaco Chemical Company
    Inventors: John R. Sanderson, John F. Knifton, Edward T. Marquis
  • Removal of water and methanol from propylene oxide by extractive distillation
    Patent number: 5145561
    Abstract: An extractive distillation agent consisting essentially of ethylene carbonate, propylene carbonate or a mixture thereof is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide, and a heavier bottoms distillation fraction containing substantially all of the extraction distillation solvent and water introduced into the distillation column.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: September 8, 1992
    Assignee: Texaco Chemical Company
    Inventors: Edward T. Marquis, George P. Speranza, Yu-Hwa E. Sheu, William K. Culbreth, III, David G. Pottratz
  • Aliphatic polyureas from polyoxyalkylene polyamines, aliphatic diisocyanates and sym-dialkylethylenediamines
    Patent number: 5140090
    Abstract: Disclosed is a method for preparing aliphatic polyureas in varying reaction times which comprises reacting polyoxyalkylene polyamines, an aliphatic diisocyanate and a sym-dialkylethylenediamine.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: August 18, 1992
    Assignee: Texaco Chemical Company
    Inventors: Donald H. Champion, George P. Speranza
  • Thermoplastic thermosettable polyamide from poly(oxytetramethylene) diamine and poly(oxytetramethylene) oligomer polyamine
    Patent number: 5140097
    Abstract: Polyamide reaction products comprising: a dicarboxylic acid and a diamine component comprising a mixture of poly(oxytetramethylene) diamines and oligomers of said poly(oxytetramethylene) diamines,said mixture containing from about 85 to about 99.5 wt. % of said poly(oxytetramethylene) diamines and, correspondingly, from about 15 to about 0.5 wt. % of said oligomers,said poly(oxytetramethylene) diamines having the formula: ##STR1## wherein n represents 0 or a positive number having a value of 1 to about 30,said oligomers having the formula: ##STR2## wherein n represents 0 or a positive number having a value of 1 to about 30.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: August 18, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su, Robert L. Zimmerman, Donald H. Champion
  • Purification of propylene oxide by extractive distillation
    Patent number: 5139622
    Abstract: An extractive distillation agent consisting essentially of triethylene glycol is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide contaminated with reduced quantities of acetone and methanol, and a heavier bottoms distillation fraction containing substantially all of the triethylene glycol, water and acetone and some of the methanol introduced into the distillation column.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: August 18, 1992
    Assignee: Texaco Chemical Company
    Inventors: Edward T. Marquis, George P. Speranza, Yu-Hwa E. Sheu, William K. Culbreth, III, David G. Pottratz
  • Fatty amides prepared by reacting dicarboxylic acids, polyoxyalkylene amine bottoms products and fatty acids or esters thereof
    Patent number: 5139706
    Abstract: Surfactant composition prepared by reacting dicarboxylic acids and esters thereof, such as adipic acid, diethyl oxalate, etc.; a polyoxyalkyleneamine residue, such as an alkylene glycol diamine bottoms product, and fatty acids and esters thereof, such as tallow acid or coconut acid, are described. These nonionic surfactant compositions are useful for preparing surfactant bars, or other molded or shaped articles such as toys.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: August 18, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su
  • Bisulfite addition products of ketone-terminated polyoxyalkylene compounds
    Patent number: 5138095
    Abstract: Bisulfite addition products, which exhibit surface active properties, prepared by reacting a ketone-terminated polyoxyalkylene compound, such as a diketone of a polyoxypropylene glycol, a monoketone of a polyoxyalkylene alcohol, etc. with an ammonium or alkali metal bisulfite are disclosed.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: August 11, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, John R. Sanderson
  • Amine terminated polyamides
    Patent number: 5138097
    Abstract: Liquid amine terminated polyamide addition products having an average molecular weight of about 3,000 to about 10,000 are prepared by the non-catalytic reaction of a dicarboxylic acid having a molecular weight within the range of about 130 to about 700 with a higher molecular weight polyoxypropylene diamine having an average molecular weight within the range of about 1,500 to about 6,000 and with a lower molecular weight polyoxypropylene diamine having an average molecular weight within the range of about 200 to about 700, the reaction conditions including a temperature within the range of about 150.degree. to about 280.degree. C., a pressure of about 0.1 to 20 atmospheres and a reaction time of about 2 to about 5 hours.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: August 11, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su
  • Catalytic synthesis of alkyl morpholinones
    Patent number: 5136035
    Abstract: 4-Alkyl-2-morpholinones are prepared by bringing an N-alkyldiethanolamine into contact with a zinc oxide promoted copper catalyst in the presence of hydrogen under reaction conditions including a temperature within the range of about 240.degree. to about 400.degree. C. and a pressure within the range of about 0 to about 300 psig and by recovering the 4-alkyl-2-morpholinone that is formed by the reaction.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: August 4, 1992
    Assignee: Texaco Chemical Company
    Inventor: Wei-Yang Su
  • Oxidation of primary alcohols to aldehydes using transition metal phthalocyanines as catalysts
    Patent number: 5132465
    Abstract: Primary alcohols may be oxidized to the corresponding aldehydes using non-toxic oxidizing agents such as tert-butyl hydroperoxide (TBHP) in the presence of a transition metal phthalocyanine catalyst. Representative catalysts include ferrous phthalocyanine and chloroferric phthalocyanine. Under some conditions, 1,1-dialkoxyalkanes may be co-produced with the aldehydes. 1,1-Dialkoxyalkanes are protected aldehydes and find utility in solvents.
    Type: Grant
    Filed: April 23, 1991
    Date of Patent: July 21, 1992
    Assignee: Texaco Chemical Company
    Inventors: John R. Sanderson, Edward T. Marquis
  • Continuous preparation of secondary amines from nitriles using a nickel catalyst
    Patent number: 5130491
    Abstract: A method for producing secondary amines, particularly fatty secondary amines such as ditallowamine from fatty nitriles, such as tallow nitrile over a nickel catalyst promoted with copper, chromium and molybdenum has been discovered. The reaction gives high selectivity of secondary amine over the coproduced primary and tertiary amines. The reaction may be conducted continuously in the presence of ammonia and hydrogen. The secondary amine proportion may be increased by a second stage using the same catalyst as the first stage, but in the absence of ammonia. The same catalyst may be used in both steps if a two stage process is used.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: July 14, 1992
    Assignee: Texaco Chemical Company
    Inventor: Robert L. Zimmerman
  • Hydroxy terminated polyoxypropylene polyamides
    Patent number: 5130382
    Abstract: Hydroxy terminated polyamides are prepared having the formula: ##STR1## wherein R represents a defined hydrocarbon group,R' and R" represents defined oxypropylene groups, and R'" represents a defined oxyethylene group,the hydroxy terminated polyamide having been prepared by first preparing an intermediate dicarboxylic acid terminated polyoxypropylene polyamide by reacting an excess of a dicarboxylic acid component with a diamine mixture composed of a higher molecular weight polyoxypropylene diamine and a lower molecular weight polyoxypropylene diamine, and by reacting the intermediate polyamide with a molar excess of an oxyethylene amino alcohol.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: July 14, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su
  • Precipitation of molybdenum
    Patent number: 5128492
    Abstract: An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by distillation into a propylene fraction, a propylene oxide fraction, a tertiary butyl alcohol fraction and a heavy liquid distillation fraction composed primarily of tertiary butyl hydroperoxide, tertiary butyl alcohol, dissolved molybdenum catalyst, and impurities including lower aliphatic C.sub.1 -C.sub.4 carboxylic acids, and the heavy liquid distillation fraction is saturated with hydrogen to precipitate the molybdenum therefrom for recovery.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: July 7, 1992
    Assignee: Texaco Chemical Company
    Inventors: William A. Smith, Robert A. Meyer, Edward T. Marquis
  • Purification of propylene oxide by liquid extraction
    Patent number: 5127997
    Abstract: Purified propylene oxide is recovered from an impure propylene oxide feedstock contaminated with more than 50 ppm of six carbon atom hydrocarbon impurities by a solvent extraction process wherein:an impure propylene oxide feedstock is charged to a liquid/liquid extraction zone and contacted therein with an extractant consisting essentially of water and a paraffinic hydrocarbon containing 8 to 10 carbon atoms, and resolved therein into a raffinate consisting essentially of an aqueous solution of propylene oxide and into an extract comprising the paraffinic hydrocarbon and the 6 carbon atom impurities initially present in the propylene oxide feedstock.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: July 7, 1992
    Assignee: Texaco Chemical Company
    Inventors: William A. Smith, Robert A. Meyer, Eileen T. Nguyen
  • Block polyamido condensation products
    Patent number: 5128441
    Abstract: A block polyamido primary amine condensation product prepared by reacting a defined polyoxyalkylene polyamine having terminal primary amine groups with an amount of a defined dicarboxylic acid or an anhydride or a C.sub.1 to C.sub.4 alkyl ester thereof, sufficient to react one mole of the dicarboxylic acid reactant with each primary amine group of the polyoxyalkylene polyamine to thereby prepare an intermediate condensation reaction product containing terminal carboxyl groups, and reacting one mole of a defined organic di-primary amine with each terminal carboxyl group of the said intermediate condensation reaction product to thereby provide, as the principal product of the reaction a block polyamido primary amine condensation product.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: July 7, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Jiang-Jen Lin
  • Sprayable polyurea elastomer made from reaction of isocyanate compound with amine terminated polyether and di(methylthio)toluene diamine and diethyltoluene diamine chain extenders
    Patent number: 5124426
    Abstract: A pourable and/or sprayable polyurea elastomer is disclosed. The elastomer includes an isocyanate, an amine terminated polyoxyalkylene polyol, and a chain extender. The isocyanate is preferably a quasi-prepolymer of an isocyanate and a material selected from at least one polyol, a high molecular weight polyoxyalkyleneamine or a combination thereof. The chain extender includes at least di(methylthio)-toluene diamine. A method for improving the flowability of a polyurea elastomer, thereby permitting the elastomer to be sprayed or, optionally, poured, is also disclosed.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: June 23, 1992
    Assignee: Texaco Chemical Company
    Inventors: Dudley J. Primeaux, II, Robert A. Grigsby, Jr., Doris M. Rice
  • Process for oligomerizing olefins using a super-dealuminated Y-zeolite
    Patent number: 5120891
    Abstract: An improved process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks are prepared in good yield by oligomerizing linear olefins using a catalyst comprising a super-dealuminated Y-zeolite.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: June 9, 1992
    Assignee: Texaco Chemical Company
    Inventors: John R. Sanderson, Pei S. E. Dai, John F. Knifton