Patents Represented by Attorney Cynthia L. Kendrick

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  • Nickel-based dual catalyst systems effective in suppressing carbon dioxide formation during diethylene glycol amination
    Patent number: 5071980
    Abstract: Disclosed is a process for simultaneously producing morpholine and GIGLYCOLAMINE.RTM. amine while suppressing CO.sub.2 formation comprising the steps of:reacting anhydrous diethylene glycol with ammonia in the presence of added hydrogen over a dual nickel/ruthenium catalyst system comprising a nickel-based catalyst plus a supported ruthenium catalyst, andisolating said morpholine compound and said DIGLYCOLAMINE.RTM. amine compound from the reaction products.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: December 10, 1991
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • One step synthesis of methyl t-butyl ether from t-butanol plus methanol using Group IV oxides treated with sulfates or sulfuric acid
    Patent number: 5059725
    Abstract: Disclosed is a method wherein t-butanol is reacted with methanol in one step to provide methyl t-butyl ether at a temperature of about 20.degree. C. to 250.degree. C. and a pressure of about atmospheric to about 1000 psig employing a catalyst consisting of a Group IV oxide on which there has been deposited a sulfur-containing compound from the group consisting of ammonium sulfate or sulfuric acid.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: October 22, 1991
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, John R. Sanderson
  • Epoxy polyurethane polyureas from epoxy resin, blocked isocyanate prepolymer and polyetherpolyamine
    Patent number: 5053465
    Abstract: An epoxy polyurethane.polyurea product having improved impact properties is formed by reacting a curing amount of a polyetherpolyamine such as, for example, an amine terminated ethylene glycol with blends of epoxy resins combined with small amounts of blocked polyoxypropylene polyol/isocyanate.prepolymer. The products of the instant invention exhibit improvements over similar blends cured with other amine curing agents which result in brittle products.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: October 1, 1991
    Assignee: Texaco Chemical Company
    Inventor: Harold G. Waddill
  • Synthesis of hydroxyl-terminated polybutadienes using glycol ether solvents
    Patent number: 5043484
    Abstract: Disclosed is an improvement in a process for polymerizing 1,3-butadiene selectively to form relatively low molecular weight hydroxyl-terminated polybutadiene oligomers in the presence of an aqueous solution of hydrogen peroxide which comprises the use of a glycol ether solvent to produce butadiene oligomers having a high degree of OH functionality and suppression of formation of solid or gel-type insoluble rubber by-products.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: August 27, 1991
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, Edward T. Marquis
  • Continuous process for preparing quaternary ammonium salts
    Patent number: 5041664
    Abstract: Disclosed is a process for the continuous preparation of quaternary ammonium chlorides from tertiary amines and organic chlorides wherein the catalyst comprises a metal oxide having Lewis acid sites, said oxide containing elements of Group IIA, IIIA, IIIB, IVA and IVB of the Periodic Table or a combination thereof.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: August 20, 1991
    Assignee: Texaco Chemical Company
    Inventor: Wei-Yang Su
  • Purification of cumene recycle streams
    Patent number: 5025112
    Abstract: A method for purifying a cumene recycle stream by removing 2-phenyl-2-propanol and cumene hydroperoxide before the cumene is distilled and recycled to the peroxidation reactor which comprises reacting the recycle cumene in the presence of an acid treated montmorillonite clay of the formula:M.sub.x/n.sup.n+.sub..y H.sub.2 O(Al.sub.4-x Mg.sub.x) (Si.sub.8)O.sub.20 (OH).sub.4or in the presence of a catalyst comprising phosphoric acid on silica.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: June 18, 1991
    Assignee: Texaco Chemical Company
    Inventors: John R. Sanderson, Edward T. Marquis, John F. Knifton
  • Purification of polyamines derived from polyhydroxyl compounds
    Patent number: 5019653
    Abstract: Disclosed is a method for purification of polyamines which comprises contacting said polyamines with a treating agent selected from the group consisting of oxides, hydroxides or alkoxides of elements from the group consisting of silicon or Group IIA, IIIA, IIB, IIIB, IVB or VB at a temperature of about 150.degree. C. to 250.degree. C. and a pressure of subatomspheric to 10 atmospheres for a period of time sufficient to lower the hydroxyl impurity level of said amines.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: May 28, 1991
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Donald H. Champion
  • Polybiurets
    Patent number: 5013812
    Abstract: Disclosed are polybiuret compositions prepared by the reaction of a polyoxyalkylene polyurea and a polyisocyanate. ##STR1## where R is H, CH.sub.3 or C.sub.2 H.sub.5 and R' is an organic radical. The reaction product of a polyoxyalkylene polyurea and polyisocyanates are prepared without the necessity of a catalyst.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: May 7, 1991
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su
  • Nickel-based dual catalyst systems effective in suppressing carbon dioxide formation during diethylene glycol amination
    Patent number: 5011926
    Abstract: Disclosed is a process for simultaneously producing morpholine and DIGLYCOLAMINE.RTM. amine while suppressing CO.sub.2 formation comprising the steps of:reacting diethylene glycol with ammonia in the presence of added hydrogen over a dual nickel-based catalyst comprising a nickel-copper-chromium oxide mix in combination with nickel-on-alumina, aisolating said morpholine compound and said DIGLYCOLAMINE.RTM. amine compound from the reaction products.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: April 30, 1991
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Process for preparing novel diamines
    Patent number: 5010160
    Abstract: Polyoxyalkylene diamine reaction products which contain as the principle reaction component, a diamine having the formula: ##STR1## wherein R' independently represents hydrogen or methyl and x is a number having an average value of at least 1 to about 60 and a diisocyanate of the formula: ##STR2## The products of the invention are obtained by reacting an excess of polyoxyalkylene diamine with a diisocyanate in the presence of a polar solvent and have the following general structures: ##STR3## where B is alkyl group from diisocyanates, and R' has the same meaning as above.These products are further used to prepare coatings with improved properties by reacting said amine products with isocyanates prepolymers and epoxy material.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: April 23, 1991
    Assignee: Texaco Inc.
    Inventors: George P. Speranza, Jiang-Jen Lin, Michael Cuscurida
  • Tertiary amyl methyl ether from C-5 olefin streams
    Patent number: 5003112
    Abstract: A method is disclosed for the preparation of tertiary amyl methyl ether by reaction of methanol and a C-5 olefin over a catalyst comprising an acidic smectite clay, particularly a palladium-modified acidic montmorillonite silica-alumina clay. The method allows for high conversions with yields of up to 93-99 mole %. Further the method is capable of operating efficiently at high LHSVs.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: March 26, 1991
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Process for preparing alkylene carbonates
    Patent number: 5003084
    Abstract: Disclosed is a process for preparing alkylene carbonates which comprises reacting the corresponding alkylene glycol and urea, optionally in the presence of a catalyst comprising a tin-containing compound, and represented by the equation: ##STR1## where R represents an alkyl group containing 1 to 16 carbons.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: March 26, 1991
    Assignee: Texaco Chemical Company
    Inventors: Wei-Yang Su, George P. Speranza
  • Salicylate of 1-isopropyl-2-methyl imidazole as an epoxy resin curative
    Patent number: 5001211
    Abstract: Disclosed in an epoxy resin curative exhibiting extended pot life, lower reactivity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 2 to 10 parts by weight of 1-isopropyl-2-methyl imidazole salicylate per 100 parts by weight epoxy resin. The latent reactive properties make the curative potentially useful in a variety of applications.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: March 19, 1991
    Assignee: Texaco Chemical Company
    Inventor: Harold G. Waddill
  • Novel olefin-terminated ureas from polyoxyalkylene amines and isocyanates
    Patent number: 4990575
    Abstract: Disclosed are novel compositions derived from polyoxyalkylene amines comprising olefin-terminated polyoxyalkylene ureas prepared by reacting polyoxyalkylene amines of the formula: ##STR1## with isopropenyl dimethylbenzyl isocyanate represented by the formula: ##STR2## said composition being represented by the formulas: ##STR3## where R'=H or methyl or ethyl and R" is the nucleus of a trifunctional polyol such as glycerine, trimethylolpropane, etc. and x has a value of 2 to 70.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: February 5, 1991
    Assignee: Texaco Chemical Co.
    Inventors: Jiang-Jen Lin, George P. Speranza
  • Elastomeric polyamide hot melt adhesive from low molecular weight polyoxyethylene diamine
    Patent number: 4946933
    Abstract: Novel thermoplastic adhesive components prepared from polyoxyethylene diamines, dimer acids and dicarboxylic acids having a wide range of predictable softening points depending upon the molar ratio of the components. Especially interesting products are synthesized employing JEFFAMINE.RTM. EDR-148 and JEFFAMINE.RTM. EDR-192 produced by Texaco Chemical Co. The adhesives can be used as self adhesive materials or as tackifiers for other adhesives.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: August 7, 1990
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su
  • Novel compositions from polyoxyalkylene amines and epoxides
    Patent number: 4940770
    Abstract: Disclosed are novel compositions useful in mixed epoxy material synthesis, poly(epoxy)-(urea) synthesis and cases where epoxy curing agents require flexibility which are essentially the reaction products of polyoxyalkylene polyamines and epoxides. Specifically the amine reactants comprise polyoxypropylene triamines, amine terminated alkylene glycols and polyoxypropylene diols, such as those represented by Texaco Chemical Company's JEFFAMINE.RTM. T-series, JEFFAMINE.RTM. EDR series and JEFFAMINE.RTM. D-series amines, respectively. The epoxide component prepolymers essentially comprise Bisphenol A diglycidyl ethers. The ratio of JEFFAMINE.RTM. amine to epoxide and the use of acetone are essential to prepare non-gelled products.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: July 10, 1990
    Assignee: Texaco Chemical Co.
    Inventors: George P. Speranza, Jiang-Jen Lin
  • Production of ethanolamine by amination of ethylene oxide over acid activated clays
    Patent number: 4939301
    Abstract: A process for preparing monoalkanolamines from ammonia and alkylene oxide using a catalyst which allows for high selectivity and high productivity which comprises an acid modified montmorillonite clay.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: July 3, 1990
    Assignee: Texaco Chemical Company
    Inventors: Neal J. Grice, John F. Knifton
  • 1-isopropyl-2-methyl imidazole as an epoxy resin curative
    Patent number: 4931528
    Abstract: Disclosed is an epoxy resin curative exhibiting extended pot life, increased resistance to heat and chemicals, lower reactivity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 1 to 5 parts by weight of 1-isopropyl-2-methyl imidazole per 100 parts by weight epoxy resin. The latent reactive properties make the curative potentially useful in a variety of applications.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: June 5, 1990
    Assignee: Texaco Chemical Company
    Inventors: Harold G. Waddill, George P. Speranza, Wei-Yang Su
  • Method for the preparation of imidazoles
    Patent number: 4927942
    Abstract: This invention discloses an improvement in the method for preparation of imidazoles by dehydrogenation of imidazolines over a nickel catalyst comprising reacting the imidazoline over a nickel catalyst in combination with from 2 to 30 weight percent of a catalyst from the group consisting of copper, chromium or a combination of both at a temperature of 160.degree. C. to 250.degree. C. and a pressure of atmospheric to 500 psig.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: May 22, 1990
    Assignee: Texaco Chemical Co.
    Inventors: George P. Speranza, Wei-Yang Su
  • Method for the preparation of imidazoles
    Patent number: 4921969
    Abstract: This invention discloses an improved method for preparation of imidazoles without isolation of the imidazoline intermediate which comprises reacting a diamine with carboxylic acid and heating the mixture at a temperature of 140.degree.-300.degree. C. at a pressure of subatmospheric to about 10 atm to form an amide, passing the amide over a nickel-containing catalyst at a temperature of 180.degree. C. to 250.degree. C. and a pressure of atmospheric to 200 psig and isolating the imidazole.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: May 1, 1990
    Assignee: Texaco Chemical Co.
    Inventors: Wei-Yang Su, George P. Speranza