Patents by Inventor Bernard Buchholz

Bernard Buchholz 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 producing alkylthio- and arylthio-substituted carboxylic acids and their thioesters
    Patent number: 5175310
    Abstract: A process is provided for producing alkylthio-substituted carboxylic acids and arylthio-substituted carboxylic acids and their corresponding alkylthio-substituted thioesters and arylthio-substituted thioesters. The process comprises reacting a mercaptan with a lactone in the presence of an acidic catalyst at temperatures of about 100.degree. C. to about 350.degree. C. The process for preparing the thio-substituted carboxylic acids and thio-substituted thioesters may be a continuous process or a batch process.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: December 29, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Michael J. Lindstrom, Bernard Buchholz, Robert B. Hager
  • Process for the manufacture of dialkyl disulfides
    Patent number: 5026915
    Abstract: A continuous process is disclosed for preparing dialkyl disulfides by reacting an alkyl alcohol and hydrogen sulfide in one reaction zone, and then passing the reactor effluent into a second reaction zone where it is reacted with elemental sulfur in the presence of a solid, particulate catalyst.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: June 25, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Bernard Buchholz, Edward J. Dzierza, John R. Baltrus
  • Process for the manufacture of dialkyl disulfides and polysulfides
    Patent number: 4937385
    Abstract: A process is disclosed for continuously preparing dialkyl disulfides and dialkyl polysulfides by reacting at elevated temperature and in the presence of a solid, particulate catalyst an alkene and hydrogen sulfide in a first reaction zone, and then passing the reactor effluent into a second reaction zone where it is reacted at elevated temperature with molten, elemental sulfur in the presence of a solid, particulate catalyst.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: June 26, 1990
    Assignee: Pennwalt Corporation
    Inventors: Bernard Buchholz, Edward J. Dzierza, Robert B. Hager
  • Process for the manufacture of dialkyl sulfides
    Patent number: 4568767
    Abstract: A process is provided for the preparation of dialkyl sulfides by reacting alkenes and hydrogen sulfide at elevated temperature in the presence of a Type X, Y or L zeolite containing from about 5 to 15 percent by weight of alkali metal, expresed as Me.sub.2 O (where Me is an alkali metal).
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: February 4, 1986
    Assignee: Pennwalt Corporation
    Inventors: Edward J. Dzierza, Bernard Buchholz
  • Process for the manufacture of methyl mercaptan from carbon oxides
    Patent number: 4410731
    Abstract: A process is provided for the manufacture of methyl mercaptan by reacting a carbon oxide, hydrogen sulfide and hydrogen in the presence of a catalyst at elevated temperature and pressure; the catalyst is a single-phase, solid material comprising a porous alumina-containing support upon which is deposited a mixture of one or more selected metallic sulfides and an alkali metal sulfide.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: October 18, 1983
    Assignee: Pennwalt Corporation
    Inventor: Bernard Buchholz
  • Process for the manufacture of dimethyl sulfide
    Patent number: 4302605
    Abstract: A process is provided for preparing dialkyl sulfides by reacting alkanols and hydrogen sulfide in the presence of a zeolite catalyst that contains a reduced amount of alkali metal cations.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: November 24, 1981
    Assignee: Pennwalt Corporation
    Inventors: Bernard Buchholz, Edward J. Dzierza
  • Preparation of mercapto-alcohols
    Patent number: 4281202
    Abstract: A process for preparing mercapto-alcohols by reacting a molar excess of hydrogen sulfide with an alkylene, cycloalkylene, or aralkylene oxide in the presence of an alkali metal zeolite catalyst.
    Type: Grant
    Filed: April 29, 1980
    Date of Patent: July 28, 1981
    Assignee: Pennwalt Corporation
    Inventors: Bernard Buchholz, Charles B. Welsh, Henry C. Miller
  • Manufacture of tertiary mercaptans using zeolite catalysts
    Patent number: 4102931
    Abstract: Certain synthetic zeolites have been found to provide high conversion over extended periods when used as catalysts in the addition reaction of hydrogen sulfide with branched, unsymmetrical olefins to produce tertiary mercaptans.
    Type: Grant
    Filed: May 17, 1977
    Date of Patent: July 25, 1978
    Assignee: Pennwalt Corporation
    Inventor: Bernard Buchholz