Patents by Inventor Hermann Overwien

Hermann Overwien 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).

  • Recovery of pure 2-methyl-2-hydroxy-heptanone-6
    Patent number: 3957730
    Abstract: A process for the recovery of pure 2-methyl-2-hydroxyheptanone-6 by conversion of impure 2-methyl-2-hydroxyheptanone-6 into 2,2,6-trimethyl 2,3-hydro-4-H-pyran by treatment with an acid which is not volatile under the reaction conditions at a temperature of from 30.degree. to 150.degree.C, purification of the 2,2,6-trimethyl-2,3-hydro-4-H-pyran thus obtained by distillation, reaction of the purified 2,2,6-trimethyl-2,3-hydro-4-H-pyran with water in the presence of an acid ion exchanger and removal of the excess water from the aqueous solution of 2-methyl-2-hydroxyheptanone-6 thus obtained by distillation. 2-methyl-2-hydroxyheptanone-6 is suitable for the production of 2-methyl-2-hydroxy-6-aminoheptane which is effective as a pharmaceutical for conditions of the heart and circulation.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: May 18, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Roman Fischer, Hermann Overwien, Axel Nissen