Patents Represented by Attorney Cynthia L. Kendrick
  • Patent number: 5169992
    Abstract: Disclosed is a one step method for synthesis of bisphenol A which comprises reacting phenol with acetone in the presence of a catalyst comprising an acidic montmorillonite clay having the structure:M.sub.x/n.sup.n+ .multidot.yH.sub.2 O(Al.sub.4-x Mg.sub.x) (Si.sub.8) O.sub.20 (OH).sub.4where M represent the interlamellar, balancing cation (normally sodium or lithium), and x, y and n are integers, wherein the acidic clay has been pretreated with an acid and optionally has deposited thereon an acid selected from the group consisting hydrogen fluoride, a fluorosulfonic acid or a mineral acid, at a temperature of from 20.degree. C. to 200.degree. C. and a pressure of from near atmospheric to about 1000 psi.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: December 8, 1992
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Patent number: 5162592
    Abstract: Disclosed is an improved process for preparing methyl t-butyl ether in one step which comprises reacting tertiary butanol and methanol in the presence of a catalyst comprising a zeolite modified with a metal selected from the group consisting of Groups IB, VB, VIB, VIIB or VIII of the Periodic Table at a temperature of about 20.degree. C. to 250.degree. C. and atmospheric pressure to about 1000 psig, wherein when the temperature is in the operating range above about 160.degree. C., the product comprises a two-phase mix of an isobutylene-MTBE product-rich phase and a heavier aqueous methanol-rich phase.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: November 10, 1992
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, John R. Sanderson, Peishing E. Dai
  • Patent number: 5159101
    Abstract: Disclosed is a process wherein cyanoethylation is accomplished by reacting a compound of the formula: ##STR1## where R=H or CH.sub.3, n=1 to 3 and m=0 to 50, and acrylonitrile over a heterogeneous catalyst comprising, potassium fluoride or cesium fluoride supported on an oxide of an element from the group consisting of Group IA, IIA or IIIA of the Periodic Table.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: October 27, 1992
    Assignee: Texaco Chemical Company
    Inventors: Donald H. Champion, George P. Speranza
  • Patent number: 5159123
    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 solvent selected from the group consisting of alkylene glycol monoalkyl ether acetates and aliphatic glycol ether carboxylates 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: May 2, 1991
    Date of Patent: October 27, 1992
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, Edward T. Marquis
  • Patent number: 5157161
    Abstract: A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in the presence of a catalyst to provide methyl-tert-butyl ether and the improvement of accomplishing the reaction in one-step which comprises:a. contacting the reactants with a montmorillonite silica-alumina catalyst which has been treated with hydrogen fluoride;b. continuously contacting said t-butanol and methanol in a molar amount of about 0.1 to 10 moles of methanol per mole of t-butanol with said catalyst at a temperature of about 20.degree. C. to about 250.degree. C. and a pressure of about atmospheric to about 1000 psig to obtain the methyl tert-butyl product, wherein under certain conditions the product mix separates into an isobutylene-MTBE product-rich phase and a heavier aqueous methanol phase.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: October 20, 1992
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Patent number: 5157162
    Abstract: A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in one step to provide methyl tert-butyl ether and the improvement of accomplishing the reaction which comprises:a. Using a catalyst consisting of a montmorillonite clay, optionally pretreated with a mineral acid, then treated with a fluorosulfonic acid;b. continuously contacting said t-butanol and methanol in a molar amount of about 0.1 to 10 moles of methanol per mole of t-butanol with said catalyst at a temperature of about 20.degree. C. to about 250.degree. C. and a pressure of about atmospheric to about 1000 psig to obtain the methyl tert-butyl ether product.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: October 20, 1992
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • 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
  • 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
  • Patent number: 5110991
    Abstract: Disclosed is a novel method for alkoxylation alcohols by reacting the alcohols with epoxides over a heterogeneous catalyst comprising a fluoride of an element of Group I of the Periodic Table on an oxide of Group IIA or Group IIIA of the Periodic Table.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: May 5, 1992
    Assignee: Texaco Chemical Company
    Inventors: Donald H. Champion, George P. Speranza
  • Patent number: 5107027
    Abstract: Disclosed is a method for preparation of alkylamines which comprises reacting ammonia and a monounsaturated olefin in the presence of a catalyst selected from the group consisting of:a. Acid modified montmorillonite clays;b. Heterogenous catalyst comprising a fluorine-containing compound on an inert support; andc. Heteropoly acids on an inert support.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: April 21, 1992
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, Neal J. Grice
  • Patent number: 5103056
    Abstract: Disclosed is a method for selective formation of amidoamines which comprises reacting a carboxylic acid group, such as, for example, a diacid or an aliphatic acid terminated amide with an aminopropylated disecondary amine which contains a secondary amine terminus in the same molecule at a temperature of about 150.degree. C. to about 260.degree.0 C.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: April 7, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Donald H. Champion
  • Patent number: 5099072
    Abstract: A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in the presence of a catalyst to provide methyl-tert-butyl ether and the improvement of accomplishing the reaction in one-step which comprises:a. using an acidic montmorillonite silica-alumina catalyst;b. continuously contacting said t-butanol and methanol in a molar amount of about 0.1 to 10 moles of methanol per mole of t-butanol with said catalyst at a temperature of about 20.degree. C. to about 250.degree. C. and a pressure of about atmospheric to about 1000 psig to obtain the methyl-tert-butyl product.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: March 24, 1992
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Patent number: 5097070
    Abstract: High molecular weight secondary amine terminated amides are disclosed which are prepared by a two-step process wherein a triamine and dibasic acid are reacted to form an acid terminated amide intermediate which is further reacted with a polyethylene glycol diamine or N,N'-diisopropyl derivative thereof to form an ungelled amine terminated product which is useful as an epoxy curing agent.The product can be represented by the following structure: ##STR1## where x=1 to 5 and R"=H or C.sub.1 to C.sub.4 carbon atoms.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: March 17, 1992
    Assignee: Texaco Chemical Company
    Inventors: Jiang-Jen Lin, George P. Speranza
  • Patent number: 5097065
    Abstract: A phenyl substituted amino acid derivative is synthesized by reacting styrene, acetamide and synthesis gas with a bimetallic catalyst comprising a rhodium-containing compound and a cobalt-containing compound, optionally in the presence of a solvent at a pressure of at least 500 psi and a temperature of at least 50.degree. C. The novel amino acid contains a carboxylic acid group, an acetamido group at the alpha-position and a phenyl group at the beta-position.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: March 17, 1992
    Assignee: Texaco Inc.
    Inventor: Jiang-Jen Lin
  • Patent number: 5093455
    Abstract: Disclosed is a coating composition with improved stability which comprises an isocyanate which has been chemically blocked and a curing agent comprising an N,N'-dialkylalkylenediamine.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: March 3, 1992
    Assignee: Texaco Chemical Company
    Inventors: Michael Cuscurida, George P. Speranza, Wei-Yang Su
  • Patent number: 5086155
    Abstract: Disclosed is an epoxy resin curative exhibiting extended pot life, lower reactivity and lower viscosity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 1 to 10 parts by weight of the ortho, meta or para form of 1-isopropyl-2-tolylimidazole per 100 parts by weight epoxy resin. The latent reactive properties make the curative potentially useful in a variety of applications.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: February 4, 1992
    Assignee: Texaco Chemical Company
    Inventors: Harold G. Waddill, Wei-Yang Su, George P. Speranza
  • Patent number: 5084202
    Abstract: Disclosed are novel isocyanate prepolymers and novel secondary amines, both prepared from alkyl diisocyanates and secondary isopropyl derivatives of polyoxyalkylene diamines. The molar ratios, reaction procedures (i.e. inverse addition of reactants) and solvent determine the products. Most of the products are light colored and nongelled.The isocyanate prepolymers are useful in the field of polyurethanes and the novel secondary amines are useful in epoxy coatings applications.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: January 28, 1992
    Assignee: Texaco Chemical Company
    Inventors: Jiang-Jen Lin, George P. Speranza
  • Patent number: 5081318
    Abstract: A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in one step to provide methyl tert-butyl ether and the improvement of accomplishing the reaction which comprises:a. Using a catalyst consisting of a crystalline aluminosilicate faujasite Y-type zeolite which has been treated with a fluorosulfonic acid;b. continuously contacting said t-butanol and methanol in a molar amount of about 0.1 to 10 moles of methanol per mole of t-butanol with said catalyst at a temperature of about 20.degree. C. to about 250.degree. C. and a pressure of about atmospheric to about 1000 psig to obtain the methyl tert-butyl ether product.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: January 14, 1992
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Patent number: 5075503
    Abstract: Disclosed are novel hydrazine terminated polyoxyalkylene amines which contain active hydrazine, secondary amines, flexible ether groups and amide functionalities in the same molecule. They are prepared in a two-step reaction which can be represented by the following: ##STR1## where R.dbd.H or CH.sub.3 and R.sup.1 .dbd.CH.sub.3 or CH.sub.2 CH.sub.3. The products are used for epoxy curing agent and chain extender for polyurea polymers.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: December 24, 1991
    Assignee: Texaco Chemical Company
    Inventors: Jiang-Jen Lin, George P. Speranza
  • Patent number: 5072020
    Abstract: Disclosed is a novel route to diamines and triamines comprising reacting nitroalcohols with isocyanates to prepare di- and trinitro compounds which are subsequently reduced over a metal hydrogenation catalyst to the corresponding polyamino compound.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: December 10, 1991
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Michael Cuscurida, Wei-Yang Su