Patents by Inventor Lawrence D. Lillwitz

Lawrence D. Lillwitz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Selective methylation catalyst, method of catalyst manufacture and methylation process
    Patent number: 7022637
    Abstract: Novel catalysts and processes in accordance with the invention can accomplish high selectivity and conversion of naphthalenic compounds such as the conversion of methylnaphthalene (2-MN) or naphthalene to 2,6-dimethylnaphthalene (2,6-DMN). The catalysts are prepared by treating, for example, a ZSM-5-type material with iron in the presence of a halogen such as a fluoride. The resulting catalyst includes iron, as well as a significant portion of aluminum present in the ZSM-5-type starting material. Processes for using the catalysts also are disclosed.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: April 4, 2006
    Assignees: BP Corporation North America Inc., The Pennsylvania State University
    Inventors: Chunshan Song, Jian-Ping Shen, Lawrence D. Lillwitz
  • Alkylation of alkylaromatics promoted by amine compound
    Patent number: 5334796
    Abstract: An improved process for alkylating an alkylaromatic having at least one benzylic hydrogen atom with an olefinic compound comprising contacting the alkylaromatic under liquid phase conditions with an olefinic compound in the presence of at least one alkali metal activated by amine compound.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: August 2, 1994
    Assignee: Amoco Corporation
    Inventors: Lawrence D. Lillwitz, Anne M. Karachewski
  • Alkylation of alkylaromatics promoted by sonicated alkali metal
    Patent number: 5198594
    Abstract: An improved process for alkylating an alkylaromatic having at least one benzylic hydrogen atom with an olefinic compound comprising contacting the alkylaromatic under liquid phase conditions with an olefinic compound in the presence of at least one alkali metal activated by sonication.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: March 30, 1993
    Assignee: Amoco Corporation
    Inventors: Lawrence D. Lillwitz, Anne M. Karachewski
  • Polyamide having improved gas barrier properties from adipic acid, isophthalic acid and m-xylylene diamine
    Patent number: 5175238
    Abstract: A polyamide composition comprising the following recurring units: ##STR1## in proportions such that the mole ratio of the dicarboxylic acid moieties in the A, B and C units is about 49.5-0.5/0-20/0.5-49.5 and wherein R is a divalent radical comprising ##STR2## in a mole ratio of about 0.5-50/49.5-0 and preferably having a glass transition temperature of 90.degree. C. or greater and an oxygen transmission rate of about 2.0 cc-mil/100 in.sup.2 -day-atm or less.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: December 29, 1992
    Assignee: Amoco Corporation
    Inventors: John D. Matlack, James G. Villanueva, Bruce A. Newman, Lawrence D. Lillwitz, Melvin L. Luetkens, Jr., Gregory E. Schmidt
  • Molded bottles and method of producing same
    Patent number: 5028462
    Abstract: Plastic bottles and a process for producing same in which at least one layer comprises a polyamide composition comprising isophthalic acid, terephthalic acid, adipic acid, metaxylylenediamine and hexamethylenediamine moieties in a molar ratio of about 49.5-0.5/0-20/0.5-49.5/0.5-50/49.5-0.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: July 2, 1991
    Assignee: Amoco Corporation
    Inventors: John D. Matlack, James G. Villanueva, Bruce A. Newman, Lawrence D. Lillwitz, Melvin L. Luetkens, Jr.
  • Preparation of cyclohexane dicarboxylic acids
    Patent number: 4754064
    Abstract: Cyclohexane dicarboxylic acids are prepared by hydrogenating phthalic acids in presence of a rhodium catalyst wherein a portion of the product stream is isolated and recycled to the reactor.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: June 28, 1988
    Assignee: Amoco Corporation
    Inventor: Lawrence D. Lillwitz
  • Purification and esterification of methacrylic acid
    Patent number: 4739108
    Abstract: A process is disclosed for separation of propionic acid and methacrylic acid and esterification of methacrylic acid with an aliphatic alcohol of from 1 to 4 carbon atoms in presence of a suitable catalyst wherein separation and esterification is obtained with minimal polymerization of methacrylic acid.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: April 19, 1988
    Assignee: Amoco Corporation
    Inventor: Lawrence D. Lillwitz
  • Process for purification of crude p-hydroxymethylbenzoic acid
    Patent number: 4721808
    Abstract: A crude p-hydroxymethylbenzoic acid compound containing 4-carboxybenzaldehyde is purified and decolorized by hydrogenation in the presence of a platinum on carbon catalyst. 4-carboxybenzaldehyde is hydrogenated to p-hydroxymethylbenzoic acid. Toluic acid is not a product of the hydrogenation process.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: January 26, 1988
    Assignee: Amoco Corporation
    Inventors: Lawrence D. Lillwitz, Steven A. Cerefice
  • Catalyzed hydrogenation of terephthalic acid to p-hydroxymethylbenzoic acid using a rhenium catalyst
    Patent number: 4448987
    Abstract: A process is disclosed for preparation of hydroxymethyl aryl monocarboxylic acid compounds by reduction of arylene dicarboxylic acid compounds in the presence of a rhenium catalyst and an aqueous solvent.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: May 15, 1984
    Assignee: Standard Oil Company (Indiana)
    Inventor: Lawrence D. Lillwitz