Patents by Inventor Wilfried Latz

Wilfried Latz 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 preparing malonic diesters in a reactor with internal heat exchangers
    Patent number: 6617469
    Abstract: A process for preparing malonic diesters by carbonylation of haloacetic esters and reaction with monohydric alcohols and a base in the presence of a transition metal catalyst, preferably a catalytic cobalt carbonyl complex, using a stirred reactor with one or more internal heat exchangers. The stirred reactor preferably contains a sparging stirrer.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: September 9, 2003
    Assignee: Degussa AG
    Inventors: Frank Bauer, Wilfried Latz, Uwe Prange, Christoph Theis
  • Process for preparing malonic diesters in a reactor with internal heat exchangers
    Publication number: 20010018540
    Abstract: A process for preparing malonic diesters by carbonylation of haloacetic esters and reaction with monohydric alcohols and a base in the presence of a transition metal catalyst, preferably a catalytic cobalt carbonyl complex, using a stirred reactor with one or more internal heat exchangers. The stirred reactor preferably contains a sparging stirrer.
    Type: Application
    Filed: December 1, 2000
    Publication date: August 30, 2001
    Inventors: Frank Bauer, Wilfried Latz, Uwe Prange, Christoph Theis
  • Process for preparing 2-aryl-2-chloromalonic diesters
    Patent number: 5777152
    Abstract: 2-Aryl-2-chloramalonic diester is prepared by reacting 2-arylmalonic diesters with aqueous hypochlorite in the presence of an inert solubilizer at pH 8 to 14.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: July 7, 1998
    Assignee: Huels Aktiengesellschaft
    Inventors: Christoph Theis, Radu Bordeianu, Wilfried Latz
  • Process for the preparation of arylacetaldehyde-dialkylacetals
    Patent number: 5202500
    Abstract: Arylacetaldehyde-dialkylacetals are prepared with high yields and selectivity from the corresponding chloromethylaromatics in the presence of hydrogen chloride acceptors and methyl carbonyl compounds as catalysts and in the presence of orthoesters as water-binding agents by hydroformylation with carbon monoxide and hydrogen.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: April 13, 1993
    Assignee: Huels Aktiengesellschaft
    Inventors: Christoph Theis, Wilfried Latz