Patents by Inventor Helmut Bahrmann

Helmut Bahrmann 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 3-(4)-formyltricyclo-[5,2,1,0.sup.2,6 ]-decene-8
    Patent number: 4289913
    Abstract: A process for preparing 3- or 4-formyltricyclo-[5,2,1,0.sup.2,6 ]-decene-8 which comprises contacting dicyclopentadiene with carbon monoxide and hydrogen in the presence of a rhodium catalyst at 110.degree. to 150.degree. C. and 50 to 400 atmospheres, said catalyst being present in an amount of 1 to 30 ppm of rhodium, based upon the amount of dicyclopentadiene employed, said rhodium being present in the form of an organic phosphine-carbon monoxide containing complex.
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: September 15, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut Bahrmann, Jurgen Weber, Boy Cornils
  • Process for the production of aldehydes
    Patent number: 4258214
    Abstract: A process for the preparation of an aldehyde of the formula R--CH(CH.sub.3)--CHO where R is a straight-chain alkyl group having 7 to 12 carbon atoms by reaction of an olefin of the formula R--CH.dbd.CH.sub.2 where the carbon monoxide and hydrogen is described, the process being carried out in the presence of a complex phosphine containing rhodium compound as catalyst. After the reaction has been performed the reaction product is subjected to a thermal treatment at 100.degree. to 190.degree. C., if desired after previous separation of the catalyst.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: March 24, 1981
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Helmut Bahrmann, Boy Cornils, Gerhard Diekhaus, Waldemar Kascha, Jurgen Weber