Patents by Inventor John R. Cassata

John R. Cassata 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).

  • Continuous isobutylene-assisted aqueous extraction of methanol from methyl tertiary butyl ether
    Patent number: 5395982
    Abstract: An impure methyl tertiary butyl ether product contaminated with isobutylene, methanol and water is purified by continuous counter-current contact with water and isobutylene in a counter-current contact extraction tower to provide an overhead extract comprising isobutylene, methyl tertiary butyl ether and water and a raffinate comprising methanol, water and a minor amount of methyl tertiary butyl ether, the overhead raffinate being separated in a methyl tertiary butyl ether purification distillation zone into a lighter distillation fraction comprising isobutylene and water and a heavier distillation fraction consisting essentially of methyl tertiary butyl ether, the lighter distillation fraction being decanted to remove water and to provide a distillate isobutylene fraction that is charged to a surge drum from which isobutylene is returned to the contact tower.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: March 7, 1995
    Assignee: Texaco Chemical Company
    Inventors: John R. Cassata, Stuart J. Parker, Rei-Yu J. Hwan, Catherine J. Conkwright
  • Ammonia synthesis
    Patent number: 4568530
    Abstract: A process for production of ammonia wherein stoichiometrically hydrogen-lean synthesis gas is reacted over a highly active synthesis catalyst.
    Type: Grant
    Filed: October 16, 1984
    Date of Patent: February 4, 1986
    Assignee: The M. W. Kellogg Company
    Inventors: Bernard G. Mandelik, John R. Cassata, Philip J. Shires, Christiaan P. van Dijk
  • Preparation of ammonia synthesis gas
    Patent number: 4479925
    Abstract: Ammonia synthesis gas having excess nitrogen is produced in a reactor-exchanger primary reformer followed by an autothermal secondary reformer wherein process air for the latter is preheated by heat exchange with gas turbine exhaust and the primary reformer is heated by synthesis gas from the secondary reformer.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: October 30, 1984
    Assignee: The M. W. Kellogg Company
    Inventors: Philip J. Shires, John R. Cassata, Bernard G. Mandelik, Christiaan P. van Dijk
  • Process for toluene diamine recovery
    Patent number: 4137266
    Abstract: Toluene diamine is obtained by hydrolyzing the toluene diisocyanate distillation residue in the presence of aqueous ammonia.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: January 30, 1979
    Assignee: Olin Corporation
    Inventor: John R. Cassata
  • Process for deactivating toluene diisocyanate distillation residue
    Patent number: 4091009
    Abstract: A selective process wherein toluene diisocyanate distillation residue is converted from a viscous liquid into an inert, granular solid by treatment with an aqueous solution of ammonia or an alkaline earth metal hydroxide.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: May 23, 1978
    Assignee: Olin Corporation
    Inventor: John R. Cassata