Patents by Inventor Norbert F. Cywinski

Norbert F. Cywinski 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).

  • Production of dimethyl esters
    Patent number: 4365080
    Abstract: This invention provides an improved process for the separation and recovery of byproducts associated with the isolation of C.sub.4 -C.sub.6 dicarboxylic acids contained in a waste byproduct stream derived from an adipic acid manufacturing operation involving nitric acid oxidation of a cyclohexanone/cyclohexanol feedstream.The main byproducts which are recovered are high purity dimethyl succinate, dimethyl glutarate and dimethyl adipate.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: December 21, 1982
    Assignee: El Paso Products Company
    Inventor: Norbert F. Cywinski
  • Treatment of byproduct stream from adipic acid manufacture
    Patent number: 4339596
    Abstract: In one embodiment, this invention provides a process for converting a dilute aqueous filtrate byproduct stream from adipic acid manufacture into a concentrated methanolic solution which does not solidify at ambient temperatures.In another embodiment, this invention provides an improved process for the separation and recovery of byproducts associated with the isolation of C.sub.4 -C.sub.6 dicarboxylic acids contained in a waste byproduct stream derived from an adipic acid manufacturing operation involving nitric acid oxidation of a cyclohexanone/cyclohexanol feedstream in the presence of a catalyst.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: July 13, 1982
    Assignee: El Paso Products Company
    Inventors: Freylon B. Coffey, Norbert F. Cywinski
  • Treatment of waste stream from adipic acid manufacture
    Patent number: 4271315
    Abstract: This invention provides a process for improving the recovery of byproducts associated with the isolation of C.sub.4 -C.sub.6 dicarboxylic acids contained in a waste byproduct stream, derived from an adipic acid manufacturing operation wherein there is involved nitric acid oxidation of a cyclohexanone/cyclohexanol feedstream.The main byproducts which are isolated are high purity dimethyl succinate, dimethyl glutarate and dimethyl adipate. Monomethyl esters of these dicarboxylic acids are recovered and recycled in the process.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: June 2, 1981
    Assignee: El Paso Products Company
    Inventor: Norbert F. Cywinski
  • Production of tertiary-butyl methyl ether
    Patent number: 4181809
    Abstract: This invention provides a process for producing tertiary-butyl methyl ether which involves contacting a mixture of isobutylene and synthesis gas with a catalyst under modified methanol synthesis processing conditions.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: January 1, 1980
    Assignee: El Paso Products Company
    Inventor: Norbert F. Cywinski