Patents Assigned to GAF-Huls Chemie GmbH
  • Regenerating heavy metal catalysts for butynediol production
    Patent number: 4388216
    Abstract: A process for regenerating suspended heavy metal catalysts used in the synthesis of butynediol from acetylene and formaldehyde. The aqueous catalytic slurry removed from the reaction mixture is raised to a temperature of about 200.degree. to 500.degree. C., where appropriate with air supplied, and is left at this temperature with air being supplied, until the carbon content of the catalytic substance is about 0.5 to 3%.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: June 14, 1983
    Assignee: GAF Huls Chemie GmbH
    Inventors: Helmut Westernacher, Franz Schamann, deceased
  • Distillation of butinediol-1,4
    Patent number: 4373999
    Abstract: A process permitting hazard free purification by distillation of compounds which are distillable per se but which present the risk of explosive decomposition under the effect of elevated temperatures. A desensitizing substance is added to the compounds to be distilled.Aliphatic alcohols for instance are suitable additives for alkinols.Examples are provided for the distillation of butinediol-1,4 together with the additive glycerin.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: February 15, 1983
    Assignee: GAF-Huls Chemie GmbH
    Inventors: Helmut Westernacher, Karl Aertken