Patents by Inventor Bryan M. Hale

Bryan M. Hale 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 for producing high purity quaternary ammonium hydroxides
    Patent number: 4714530
    Abstract: A process is described for improving the purity of quaternary ammonium hydroxides. In one embodiment, the process of the present invention comprises the steps of(a) charging an aqueous solution containing the quaternary ammonium hydroxide to the anolyte compartment of an electrolysis cell which comprises an anolyte compartment and a catholyte compartment containing water separated from each other by a cation-exchange membrane,(b) passing a direct current through the electrolysis cell to produce a high purity quaternary ammonium hydroxide in the catholyte compartment, and(c) recovering the high purity quaternary ammonium hydroxide from the catholyte compartment.In a preferred embodiment, the aqueous solution containing the quaternary ammonium hydroxide charged to the anolyte compartment is heated to an elevated temperature for a given period of time prior to subjecting the quaternary ammonium hydroxide to the electrolytic process of the present invention.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: December 22, 1987
    Assignee: Southwestern Analytical Chemicals, Inc.
    Inventors: Cecil H. Hale, Alan R. Tanner, Bryan M. Hale