Patents by Inventor Gerog Kohl

Gerog Kohl 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).

  • Patent number: 5296630
    Abstract: A process for continuously producing an anhydrous methyl acetate/methanol mixture by esterifying acetic acid and methanol in the presence of an acidic esterification catalyst is indicated, which comprises carrying out the esterification in a distillation column having n=20 to 50 distillation trays,a) the acetic acid being fed together with the catalyst to a distillation tray which is at a distance of 0.5 n to 0.8 n from the still bottom,b) feeding 50 to 80% by weight of the total methanol to the still bottom and the remaining methanol to a distillation tray which is 2 to 10 trays above the acetic acid feed tray,c) feeding methanol and acetic acid into the distillation column at a molar ratio of (1.5 to 3):1,d) setting a reflux ratio of (0.75 to 1.5):1,e) taking off the anhydrous methyl acetate/methanol mixture at the top of the column andf) a water/methanol/acetic acid bottom product with the catalyst from the still bottom.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: March 22, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Heinz Erpenbach, Klaus Gunther, Gerog Kohl