Patents by Inventor Randa W. Wytcherley

Randa W. Wytcherley 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).

  • Method and apparatus for recovering carboxylic acids from dilute solutions
    Patent number: 5624566
    Abstract: A method for recovering carboxylic acids from a dilute aqueous solution thereof having a concentration below about ten percent (10%) by weight, which includes passing the dilute acid solution through a reverse osmosis separator, thereby producing a permeate substantially free of acid and a retentate having an acid concentration above about ten percent (10%) by weight. The retentate is contacted with a liquid extractant for acids to produce an acid-rich extractate and an acid-free raffinate. The acid is then recovered from the acid-rich extractate.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 29, 1997
    Assignee: Glitsch, Inc.
    Inventors: Randa W. Wytcherley, Joseph C. Gentry, Ronald G. Gualy
  • Method of recovering carboxylic acids from dilute solutions
    Patent number: 5492625
    Abstract: A method for recovering carboxylic acids from a dilute aqueous solution thereof having a concentration below about ten percent (10%) by weight, which includes passing the dilute acid solution through a reverse osmosis separator, thereby producing a permeate substantially free of acid and a retentate having an acid concentration above about ten percent (10%) by weight. The retentate is contacted with a liquid extractant for acids to produce an acid-rich extractate and an acid-free raffinate. The acid is then recovered from the acid-rich extractate.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: February 20, 1996
    Assignee: Glitsch, Inc.
    Inventors: Randa W. Wytcherley, Joseph C. Gentry, Ronald G. Gualy
  • Process to recover benzene from mixed hydrocarbons by extractive distillation
    Patent number: 5399244
    Abstract: Benzene and other aromatics are separated from a stream of mixed hydrocarbons containing both aromatics and non-aromatics by extractive distillation with a solvent system containing dimethyl sulfoxide and optionally a co-solvent, preferably water, followed by distillation stripping of the aromatics from the enriched solvent system, and recycle of the lean solvent system to the extractive distillation step.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: March 21, 1995
    Assignee: Glitsch, Inc.
    Inventors: Joseph C. Gentry, Lloyd Berg, John C. McIntyre, Randa W. Wytcherley