Patents by Inventor Karl-Heinz Bruehl

Karl-Heinz Bruehl 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).

  • Salt-free preparation of cyclobutanone
    Patent number: 6958421
    Abstract: A salt-free process for preparing cyclobutanone, including isomerizing cyclopropylmethanol, preferably in aqueous solution, in the presence of an acidic heterogeneous catalyst to form cyclobutanol and, preferably after extraction and removal of the extractant, dehydrogenating the cyclobutanol over a heterogeneous catalyst.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: October 25, 2005
    Assignee: Degussa AG
    Inventors: Kerstin Bodmann, Manuela Imig, Günther Köhler, Karl-Heinz Brühl
  • Preparation of 2-chloro-1,1,1-trialkoxyethane
    Patent number: 6747176
    Abstract: 2-Chloro-1,1,1-trialkoxyethane of formula (II): wherein R1 to R3, which may be the same or different, are alkyl, or any two of the alkyl groups taken together form a cyclic group, is prepared by reacting 1,1,1-trialkoxyethane with gaseous or liquid chlorine in the presence of alcohol solvent in an amount ranging from 0.1% to 20 wt %, based on the amount of 1,1,1-trialkoxyethane reactant.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: June 8, 2004
    Assignee: Degussa AG
    Inventors: Guenther Koehler, Karl-Heinz Bruehl, Johannes Ruwwe, Manfred Neumann
  • Preparation of 2-chloro-1,1,1-trialkoxyethane
    Publication number: 20030229255
    Abstract: 2-Chloro-1,1,1-trialkoxyethane of formula (II): 1
    Type: Application
    Filed: June 10, 2003
    Publication date: December 11, 2003
    Applicant: Degussa Ag
    Inventors: Guenther Koehler, Karl-Heinz Bruehl, Johannes Ruwwe, Manfred Neumann