Patents by Inventor Emil J. Walerko

Emil J. Walerko 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).

  • Purifying ethyl tetrahydrofurfuryl ether by aqueous salt extraction
    Patent number: 4305878
    Abstract: Mixtures including ethyl tetrahydrofurfuryl ether (ETFE), tetrahydrofurfuryl alcohol (THFA), ethanol and water, and usually also an ethyl halide, are extracted with an aqueous solution of an alkali metal or alkaline earth metal chloride salt until THFA/ETFE ratios below 0.01 or 0.001 are achieved. Thereby THFA and ethanol, each of which are difficult to separate from ETFE by distillation, are removed.
    Type: Grant
    Filed: January 15, 1981
    Date of Patent: December 15, 1981
    Assignee: Allied Corporation
    Inventors: Arthur S. Chu, Frank Scarcello, Emil J. Walerko