Patents by Inventor Lothar Sandhack

Lothar Sandhack 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).

  • Continuous process for producing gamma-butyrolactone by catalytic hydrogenation of maleic anhydride
    Patent number: 4025534
    Abstract: A continuous process for producing gamma-butyrolactone by hydrogenating maleic anhydride in two stages in the presence of a catalyst composed of cobalt oxide and palladium on a support of silica. The hydrogenation is performed at a hydrogen pressure of 100 to 125 atmospheres and at a temperature of 50.degree. to 100.degree. C. in the first stage and at 190.degree. to 220.degree. C. in the second stage.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: May 24, 1977
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Lothar Sandhack, Werner Webers, Georg Michalczyk, Karl-Heinz Gluzek
  • Process for the production of lower alcohols by direct catalytic hydration lower olefins
    Patent number: 3994983
    Abstract: A process for the production of C.sub.2 to C.sub.6 alcohols via the direct hydration of olefins in the presence of water, and acid or a strongly acidic solid with the separation of aqueous crude alcohols from the reaction product.
    Type: Grant
    Filed: June 12, 1975
    Date of Patent: November 30, 1976
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Werner Webers, Lothar Sandhack, Wilhelm Neier