Patents by Inventor Preston D. Krautheim

Preston D. Krautheim 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).

  • Extraction and/or extractive distillation of low molecular weight alcohols from aqueous solutions
    Patent number: 4428798
    Abstract: A process is disclosed for separating low molecular weight alcohols, especially ethanol, from aqueous mixtures. The process involves subjecting alcohol-water mixtures to extraction and/or extractive distillation procedures. Extractive solvents useful for the process of this invention include phenols having at least six carbon atoms and a boiling point between about 180.degree. C. and about 350.degree. C.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: January 31, 1984
    Assignee: Allied Corporation
    Inventors: David Zudkevitch, Stephen E. Belsky, Preston D. Krautheim