Patents by Inventor Kenneth R. Purdy

Kenneth R. Purdy 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).

  • Thermochemical conversion of biomass to syngas via an entrained pyrolysis/gasification process
    Patent number: 4497637
    Abstract: Biomass feedstock raw material is converted to synthesis gas by drying and sizing biomass raw material, pyrolyzing the processed biomass in intimate mixture with inert gases such as combustion products, thereby obtaining a product mixture of char, pyrolysis oil, and pyrolysis gas, and gasifying the char and some of the pyrolysis oil in the presence of steam and oxygen at a temperature sufficient to form the synthesis gas product substantially comprising carbon monoxide and hydrogen.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: February 5, 1985
    Assignee: Georgia Tech Research Institute
    Inventors: Kenneth R. Purdy, Charles W. Gorton, James A. Knight, Jr.
  • Pyrolysis system with hot gas recirculation
    Patent number: 4465556
    Abstract: A process and system for continuously pyrolyzing organic feedstock produces a solid carbonaceous residue of controlled volatility, in a manner that is highly energy efficient. The value of the gaseous product and of the pyrolytic oil produced are also optimized.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: August 14, 1984
    Assignee: American Carbons, Inc.
    Inventors: Mack D. Bowen, Kenneth R. Purdy
  • Pyrolysis system with hot gas recirculation
    Patent number: 4419185
    Abstract: A process and system for continuously pyrolyzing organic feedstock produces a solid carbonaceous residue of controlled volatility, in a manner that is highly energy efficient. The value of the gaseous product and of the pyrolytic oil produced are also optimized.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: December 6, 1983
    Assignee: American Carbons, Inc.
    Inventors: Mack D. Bowen, Kenneth R. Purdy
  • Pyrolysis system utilizing pyrolytic oil recycle
    Patent number: 4373995
    Abstract: A pyrolysis process and system produces a solid residue and a clean, enriched fuel gas. In the process, the pyrolytic oil and filter cake are recycled in such a manner as to produce products of optimal value, and to minimize the need for servicing and downtime of the system. Recycling of water recovered in the process may also be employed to achieve enrichment of the gaseous product. The process may be carried ou in such a manner as to produce a non-polluting wastewater stream that can be discharged directly from the system.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: February 15, 1983
    Inventors: Mack D. Bowen, Kenneth R. Purdy
  • Pyrolysis process utilizing pyrolytic oil recycle
    Patent number: 4317703
    Abstract: A pyrolysis process and system produces a solid residue and a clean, enriched fuel gas. In the process, the pyrolytic oil and filter cake are recycled in such a manner as to produce products of optimal value, and to minimize the need for servicing and downtime of the system. Recycling of water recovered in the process may also be employed to achieve enrichment of the gaseous product. The process may be carried out in such a manner as to produce a non-polluting wastewater stream that can be discharged directly from the system.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: March 2, 1982
    Assignee: American Can Company
    Inventors: Mack D. Bowen, Kenneth R. Purdy
  • Process for producing highly activated carbonaceous products
    Patent number: 4230602
    Abstract: A single-pass, continuous process converts organic feedstocks into activated carbonaceous products having high surface area values. The introduction of air and steam into the bed of material at selected locations, and at controlled rates, enables the economic, dependable and convenient production of such products, while maximizing the efficiency of energy utilization.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: October 28, 1980
    Assignee: American Can Company
    Inventors: Mack D. Bowen, Kenneth R. Purdy