Patents by Inventor Clarence J. Duey, Jr.

Clarence J. Duey, Jr. 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).

  • Copper and manganese removal from C.sub.6 -C.sub.9 saturated aliphatic monocarboxylic acids
    Patent number: 4496488
    Abstract: A process is described for removing copper and manganese ions from a saturated aliphatic monocarboxylic acid containing from 6 to 9 carbon atoms by extracting the metal ions into an aqueous layer in the presence of an extractant acid, the hydrogen of which can be replaced by both metal ions. The metal ion-containing aqueous layer may then be separated from the monocarboxylic acid-containing organic layer, with the latter layer having a substantially reduced content of copper and manganese ions.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: January 29, 1985
    Assignee: Celanese Corporation
    Inventor: Clarence J. Duey, Jr.