Patents Represented by Attorney Cynthia L. Kendrick

Find this attorney in the Justia Lawyer Directory

  • Process for synthesis of N-acetylglycine
    Patent number: 4918222
    Abstract: An N-acetylglycine is manufactured by reacting paraformaldehyde with an acetamide and carbon monoxide in the present of a cobalt-containing catalyst promoted by a sulfoxide or dinitride compounds. The presence of sulfoxide or dinitrile ligands are essential for the high yield synthesis of N-acetylglycine and good cobalt recovery.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: April 17, 1990
    Assignee: Texaco Inc.
    Inventors: Jiang-Jen Lin, John F. Knifton, Ernest L. Yeakey
  • Process for preparing oxazine derivatives
    Patent number: 4910303
    Abstract: This invention relates to the reaction of N-alkyl-bis-(2-hydroxyalkyl)amines to form oxazine derivatives by a process comprising reacting said amines in the presence of a ruthenium-containing compound and hydrogen acceptor.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: March 20, 1990
    Assignee: Texaco Chemical Company
    Inventors: Wei-Yang Su, John F. Knifton
  • Process for preparing diamines
    Patent number: 4906774
    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: July 27, 1987
    Date of Patent: March 6, 1990
    Assignee: Texaco Inc.
    Inventors: George P. Speranza, Jiang-Jen Lin, Michael Cuscurida
  • Method for production of phenol/acetone from cumene hydroperoxide
    Patent number: 4898987
    Abstract: A method is disclosed for the synthesis of phenol and acetone by acid-catalyzed decomposition over a catalyst comprising an acidic montmorillonite silica alumina clay, modified with a compound from the group consisting of a heteropoly acid, or the inorganic salt of zirconium, titanium and aluminum. The method allows for a 6-fold improvement in rate using heteropoly acid modified montmorillonite clays and a six to 10-food improvement is observed using zirconium or titanium, respectively.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: February 6, 1990
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Method for production of phenol/acetone from cumene hydroperoxide
    Patent number: 4898995
    Abstract: A method is disclosed for the synthesis of phenol and acetone by decomposition over a heterogeneous catalyst from the group consisting of a heteropoly acid on an inert support or an ion exchange resin with a sulfonic acid functionality. The method allows for quantitative conversions with yields of up to >99 mole % or better.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: February 6, 1990
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, John R. Sanderson
  • Method for the production of N-methylpyrrolidine
    Patent number: 4892959
    Abstract: A method is disclosed for the improved production of N-methylpyrrolidine at moderate conditions which comprises the steps of reacting N-methylpyrrolidone with hydrogen over a copper chromite catalyst at a moderate temperature and a pressure of 1000 psig to 5000 psig and thereafter isolating the N-methylpyrrolidine by extraction with an aliphatic hydrocarbon solvent having a boiling point less than 70.degree. C. or greater than 90.degree. C.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: January 9, 1990
    Assignee: Texaco Chemical Co.
    Inventors: Donald H. Champion, John F. Knifton, Wei-Yang Su
  • Process for synthesis of amidoacids using a cobalt catalyst and a bidental phosphine ligand
    Patent number: 4892687
    Abstract: A process is disclosed for producing N-acetyl-aminoacid which comprises reacting a feedstock from the group consisting of simple olefins, acetamide and synthesis gas with a catalyst comprising a cobalt-containing compound promoted by a bidental-phosphine ligand in a solvent at a pressure of 500 psi or greater and a temperature of 50.degree. C. or greater. The presence of the ligand increases both reaction rate and cobalt catalyst stability.
    Type: Grant
    Filed: October 8, 1986
    Date of Patent: January 9, 1990
    Assignee: Texaco Inc.
    Inventor: Jiang-Jen Lin
  • Process for synthesis of .beta.-phenylalanine
    Patent number: 4891442
    Abstract: N-acetyl-.beta.-phenylalanine is synthesized by reacting phenylacetaldehyde, acetamide and synthesis gas with a catalyst comprising a cobalt-containing compound in conjunction with a cocatalyst that may be either a Group VB or VIB containing ligand, or a rhodium compound optionally bonded to one or more Group VB or VIB donor ligands, at a temperature of at least 50.degree. C. and a pressure of at least 500 psi.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: January 2, 1990
    Assignee: Texaco Inc.
    Inventors: Jiang-Jen Lin, John F. Knifton
  • Aromatic amine terminated trifunctional polyoxyalkylene urea
    Patent number: 4886909
    Abstract: A novel aromatic amine terminated trifunctional polyoxyalkylene urea which is useful as an epoxy curing agent is disclosed and is prepared in a two step process comprising reacting a triamine or a triol with a diisocyanate to form an intermediate product and subsequently reacting the intermediate with a diprimary amine in the presence of an alcohol solvent.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: December 12, 1989
    Assignee: Texaco Chemical Company
    Inventors: Jiang-Jen Lin, George P. Speranza
  • Novel compositions from polyoxyalkylene amines and epoxides
    Patent number: 4886867
    Abstract: Disclosed is a method for preparing a novel difunctional epoxy resin of the formula: ##STR1## where R is from a Bisphenol A diglycidyl ether and x=2 to .apprxeq.10, which comprises reacting an excess of a Bisphenol A diglycidyl ether with a secondary isopropyl amine derivative of a polyoxyalkylene primary diamine or triamine in the presence of acetone.A method for preparing a novel di- and trifunctional secondary amines of the formula: ##STR2## which comprises reacting a Bisphenol A diglycidyl ether with an excess of a secondary isopropyl amine derivative of a polyoxyalkylene primary diamine or triamine in the presence of acetone where R is from Bisphenol A diglycidyl ether and x=1, 2 or 3.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: December 12, 1989
    Assignee: Texaco Chemical Company
    Inventors: Jiang-Jen Lin, George P. Speranza
  • Method for production of phenol/acetone from cumene hydroperoxide
    Patent number: 4876397
    Abstract: A method is disclosed for the synthesis of phenol and acetone by decomposition over a heterogeneous catalyst comprising a fluorine-containing acidic compound on an inert support. The method allows for quantitative conversions with yields of up to >99 mole %.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: October 24, 1989
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, Neal J. Grice
  • Oxyethylene bismaleimide derivatives
    Patent number: 4876358
    Abstract: Novel bismaleimides of the formula ##STR1## wherein n=1, 2, or 3 are formed in two steps by reacting a diamine and maleic anhydride to form a bismaleamic acid which is reacted with acetic anhydride in the presence of acetone to form the bismaleimide.The bismaleimide monomer and prepolymers and the polybismaleimides formed from them may have improved flexibility, processibility, toughness and solubility.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: October 24, 1989
    Assignee: Texaco Inc.
    Inventor: David C. Alexander
  • Method for production of phenol/acetone from cumene hydroperoxide
    Patent number: 4870217
    Abstract: A method is disclosed for the synthesis of phenol and acetone by acid-catalyzed decomposition over a catalyst comprising an acidic smectite clay, particularly an acidic montmorillonite silica-alumina clay. The method allows for quantitative conversions with yields of up to 98% mole or better. Further the method is capable of operating efficiently at high LHSVs.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: September 26, 1989
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton
  • Process for one-step synthesis of amides
    Patent number: 4866177
    Abstract: A N-alkyl amide derivative is synthesized in one-step by reacting an olefin, nitrogen-containing compound and carbon monoxide with a catalyst comprising a rhodium-containing compound in the presence of water at a pressure of at least 500 psi and a temperature of at least 50.degree. C.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: September 12, 1989
    Assignee: Texaco Inc.
    Inventor: Jiang-Jen Lin
  • Process for the hydroformylation/Michael addition of acrylates to diesters
    Patent number: 4849543
    Abstract: This invention concerns a process for the production of diesters by hydroformylation/Michael addition of alkyl acrylates, which comprises contacting the alkyl acrylate with carbon monoxide and hydrogen in the presence of a catalyst system comprising a rhodium-containing compound, excess phosphine-containing ligand, a nitrogen-containing compound and a solvent at a temperature of 70.degree.-150.degree. C. and a pressure of 500-4000 psi.
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: July 18, 1989
    Assignee: Texaco Inc.
    Inventor: Jiang-Jen Lin
  • High molecular weight polyalkoxyamide, urea or urethane-containing piperidine radical
    Patent number: 4847380
    Abstract: Novel high molecular weight polyalkoxyamine derivatives are prepared which contain a polyalkoxyamide, urea or urethane backbone with a piperidine terminal radical.The structures can be represented by the following three classes of compounds: ##STR1## where R.sub.1 is from dibasic acid, e.g. adipic or dimer acid; R.sub.2 is from diisocyanate, e.g. IPDI or TMXDI.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: July 11, 1989
    Assignee: Texaco Inc.
    Inventors: George P. Speranza, Jiang-Jen Lin
  • Process for hydroformylation of n-vinyl-2-pyrrolidinone
    Patent number: 4831159
    Abstract: A process is disclosed for preparing isomeric aldehydes by contacting N-vinyl-2-pyrrolidinone and synthesis gas in the presence of a rhodium-containing compound with or without additional phosphine ligand and a solvent. The alpha and beta isomeric aldehydes such as 2-N-(2-pyrrolionyl)propanaldehyde and 3-N-(2-pyrrolidonyl)propanaldehyde can be converted to 1,2- or 1,3-diaminopropanes via reductive amination or to alcohol amines via reduction.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: May 16, 1989
    Assignee: Texaco Inc.
    Inventor: Jiang-Jen Lin
  • Liquid cleaning compositions containing polyether amide surfactants as thickening agents
    Patent number: 4828757
    Abstract: A method of thickening an aqueous solution containing from 5 to 50 wt% of a surfactant is disclosed comprising the addition of from about 0.1 to 10 wt% to the solution of a polyether amide derivative having the general formula: ##STR1## wherein R=C.sub.9 -C.sub.23 and a=1 to about 5 and b=1 to 500.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: May 9, 1989
    Assignee: Texaco Chemical Company
    Inventors: Carter G. Naylor, Jiang-Jen Lin, George P. Speranza
  • Bismaleimide derivatives of higher molecular weight polyoxyalkyleneamines
    Patent number: 4826995
    Abstract: Novel bismaleimide derivatives of higher molecular weight polyoxyalkyleneamines of the formula: ##STR1## are prepared by reacting higher molecular weight polyoxyalkyleneamines with bismaleimides prepared from low molecular weight oxyethylenediamines. In another embodiment aromatic bismaleimides derivatives are prepared.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: May 2, 1989
    Assignee: Texaco Inc.
    Inventors: David C. Alexander, George P. Speranza
  • Method for one-step synthesis of methyl t-butyl ether
    Patent number: 4827048
    Abstract: A method is disclosed for producing methyl tertiary butyl ether by reacting tertiary butyl alcohol and methanol in the presence of a catalyst comprising a heteropoly acid, such as 12-tungstophosphoric acid or 12-molybdophosphoric acid, on an inert support, such as titania, at an elevated temperature and moderate pressure.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: May 2, 1989
    Assignee: Texaco Chemical Company
    Inventor: John F. Knifton