Patents by Inventor Robert M. Weinstein

Robert M. Weinstein 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).

  • Process for the preparation of cyclohexanol derivatives
    Patent number: 5160498
    Abstract: A process for the preparation of 4-tert-butyl-cyclohexanol, comprising the hydrogenation of 4-tert-butyl-phenol or of 4-tert-butyl-cyclohexanone in the presence of a catalytic system composed of rhodium on a Al.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2, SiO.sub.2.Al.sub.2 O.sub.3 or charcoal support, in combination with HBF.sub.4 or BF.sub.3.[Y].sub.n wherein Y designates a R.sub.2 O group, R being a C.sub.1 to C.sub.6 lower alkyl radical, or a CH.sub.3 CO.sub.2 H, H.sub.3 PO.sub.4 or H.sub.2 O group and index n is equal to zero, 1 or 2.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: November 3, 1992
    Assignee: Firmenich S.A.
    Inventor: Robert M. Weinstein
  • Process for the preparation of cyclohexanol derivatives
    Patent number: 5107038
    Abstract: A process for the preparation of 4-tert-butyl-cyclohexanol, comprising the hydrogenation of 4-tert-butyl-phenol or of 4-tert-butyl-cyclohexanone in the presence of a catalytic system composed of rhodium on a Al.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2, SiO.sub.2.Al.sub.2 O.sub.3 or charcoal support, in combination with HBF.sub.4 or BF.sub.3.[Y].sub.n wherein Y designates a R.sub.2 O group, R being a C.sub.1 to C.sub.6 lower alkyl radical, or a CH.sub.3 CO.sub.2 H, H.sub.3 PO.sub.4 or H.sub.2 O group and index n is equal to zero, 1 or 2.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: April 21, 1992
    Assignee: Firmenich SA
    Inventor: Robert M. Weinstein
  • Process for preparing alkylene carbonates from alkylene oxides
    Patent number: 4931571
    Abstract: An alkylene oxide, e.g. ethylene oxide, is prepared from the corresponding alkylene carbonate, e.g. ethylene carbonate, in the presence of an effective amount of a quaternary arsonium halide. The quaternary arsonium halides are also effective catalysts for the reverse reaction, that is, to form alkylene carbonates from the corresponding epoxide and carbon dioxide.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: June 5, 1990
    Assignee: Scientific Design Company, Inc.
    Inventor: Robert M. Weinstein
  • Process for preparing alkylene oxides from alkylene carbonates
    Patent number: 4851555
    Abstract: An alkylene oxide, e.g. ethylene oxide, is prepared from the corresponding alkylene carbonate, e.g. ethylene carbonate, in the presence of an effective amount of a quaternary arsonium halide. The quaternary arsonium halides are also effective catalysts for the reverse reaction, that is, to form alkylene carbonates from the corresponding epoxide and carbon dioxide.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: July 25, 1989
    Assignee: Scientific Design Company, Inc.
    Inventor: Robert M. Weinstein