Patents by Inventor Charles E. Cutchens

Charles E. Cutchens 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 and separation of amines
    Patent number: 4491673
    Abstract: This invention provides for the separation of the contents of the process discharge stream of reaction in which an amine is produced from a nitrile. An inorganic base having a concentration greater than 40 weight percent is introduced into the process discharge stream which is decanted, purged, flashed, and a portion thereof recycled.
    Type: Grant
    Filed: April 19, 1982
    Date of Patent: January 1, 1985
    Assignee: Monsanto Company
    Inventors: Charles E. Cutchens, Marion J. Mathews, III, Mark S. Sowell, III
  • Catalyst separation in production of amines
    Patent number: 4429159
    Abstract: In the production of amines from nitriles where the nitriles are hydrogenated under pressure in the presence of a Raney Nickel Catalyst using hydrogen produced from methane and containing CO.sub.2, a more efficient separation of the product hexamethylene diamine from the catalyst is obtained by maintaining a specified carbonate concentration. This specific carbonate concentration improves the settling characteristics of the catalyst and reduces catalyst carryover into the crude hexamethylene diamine during decantation.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: January 31, 1984
    Assignee: Monsanto Company
    Inventors: Charles E. Cutchens, Lynn H. Lanier
  • Production and separation of amines
    Patent number: 4395573
    Abstract: In the production of hexamethylenediamine from adiponitrile an inorganic base is used to facilitate separation of Raney nickel catalyst and crude hexamethylenediamine.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: July 26, 1983
    Assignee: Monsanto Company
    Inventors: Charles E. Cutchens, Marion J. Mathews, III, Mark S. Sowell, III
  • Catalyst passivation in production of amines
    Patent number: 4359585
    Abstract: This is an improvement in a process for the production of an amine such as hexamethylenediamine from a nitrile such as adiponitrile where the nitrile is hydrogenated under pressure in the presence of a Raney nickel catalyst, the reaction being conducted in a reactor from which is discharged a product stream containing both the amine and the Raney nickel catalyst. The improvement comprises charging to the process discharge stream containing the product amine and the Raney nickel catalyst, an inorganic base, whereby the Raney nickel catalyst is passivated and catalytic decomposition of the amine is substantially decreased.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: November 16, 1982
    Assignee: Monsanto Company
    Inventors: Charles R. Campbell, Charles E. Cutchens
  • Catalyst passivation in production of amines
    Patent number: 4247481
    Abstract: This is an improvement in a process for the production of an amine such as hexamethylenediamine from a nitrile such as adiponitrile where the nitrile is hydrogenated under pressure in the presence of a Raney nickel catalyst, the reaction being conducted in a reactor from which is discharged a product stream containing both the amine and the Raney nickel catalyst. The improvement comprises charging to the process discharge stream containing the product amine and the Raney nickel catalyst, a nitroaromatic compound, whereby the Raney nickel catalyst is passivated and catalytic decomposition of the amine is substantially decreased.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: January 27, 1981
    Assignee: Monsanto Company
    Inventors: Charles R. Campbell, Charles E. Cutchens