Patents by Inventor Gerald E. Hollenbach

Gerald E. Hollenbach 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: 5122234
    Abstract: This invention is a continuous process for preparing phenol having improved clarity when dispersed in water. The phenol is prepared from crude phenol being the product of decomposition of cumene hydroperoxide and having previously been distilled to remove large portions of acetone, cumene and alphamethyl styrene.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: June 16, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Saul L. Elishewitz, Clifford M. Gilpin, III, Gerald E. Hollenbach, John J. Santarsiero, II, William J. Moffatt, David B. Lebowitz, Dodd S. Smith, Larry B. Wolf
  • Patent number: 4298765
    Abstract: Phenol (10) produced by the cleavage of cumene hydroperoxide is chemically treated with a base (12) such as a polyamine, is optionally then treated with an acid or acid anhydride (15) such as phthalic anhydride, is then steamed distilled (12) to remove a lites fraction as a water azeotrope (21) and the bottoms (34) of the steam distillation are vacuum distilled (35) to recover high purity phenol (36) as an overhead. The overheads (21) of the steam distillation are condensed (22) and may be phase separated (23) into an aqueous phase (25) and organic phase (24), with the aqueous phase (25) mixed (26) with an organic solvent (27) which preferentially dissolves benzofuran impurities. This mixture is phase separated into an organic solvent phase (30, 130) and a recycle aqueous phase (31). Alternatively, the entire condensed overheads (21) may be extracted (146-151 and 153) with organic solvent.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: November 3, 1981
    Assignee: Allied Corporation
    Inventors: Jerry R. Cochran, Thomas H. Insinger, Gerald E. Hollenbach, Ronald F. Piskorz, Addison M. Smith