Patents by Inventor John H. Crow

John H. Crow 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).

  • Alkanolaminium carboxylate solvents for selective SO.sub.2 absorption
    Patent number: 4465614
    Abstract: Aqueous solutions comprising from about 35 to about 85% by weight of an alkanolaminium carboxylate have proven to be highly efficient absorption solvents for sulfur dioxide. Such solvents preferentially absorb sulfur dioxide from the gas streams containing large quantities of carbon dioxide. The rate at which dissolved sulfur dioxide oxidizes to non-regenerable sulfate salts is significantly reduced by such solvents.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: August 14, 1984
    Assignee: Trentham Corporation
    Inventors: H. Lee Trentham, John H. Crow, Farwell C. Boston
  • Removal of sulfur from waste gas streams
    Patent number: 4387037
    Abstract: Preferential sulfur dioxide absorption solvents may be buffered with suitable agents, such as alkanolaminium carboxylates, to substantially retard or eliminate the tendency of such solvents to degrade or accumulate non-regenerable salts, particularly sulfates, when loaded with absorbed sulfur dioxide. A method for employing the buffer as an immiscible aqueous phase as a separate trimming solvent to selectively absorb residual sulfur dioxide from a gas stream from which the bulk amount of sulfur dioxide is first removed by contact with a trialkyl phosphate solvent is disclosed. The method permits the trialkyl phosphate solvent to be regenerated and purged of salts at lower energy requirements.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: June 7, 1983
    Assignee: Trentham Corporation
    Inventors: H. Lee Trentham, John H. Crow, Farwell C. Boston
  • Alkanolaminium carboxylate solvents for selective SO.sub.2 absorption
    Patent number: 4363791
    Abstract: Aqueous solutions comprising from about 35 to about 85% by weight of an alkanolaminium carboxylate have proven to be highly efficient absorption solvents for sulfur dioxide. Such solvents preferentially absorb sulfur dioxide from the gas streams containing large quantities of carbon dioxide. The rate at which dissolved sulfur dioxide oxidizes to non-regenerable sulfate salts is significantly reduced by such solvents.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: December 14, 1982
    Assignee: Trentham Corporation
    Inventors: H. Lee Trentham, John H. Crow, Farwell C. Boston
  • Removal of sulfur from waste gas streams
    Patent number: 4320101
    Abstract: Preferential sulfur dioxide absorption solvents may be buffered with suitable agents, such as alkanolaminium carboxylates, to substantially retard or eliminate the tendency of such solvents to degrade or accumulate non-regenerable salts, particularly sulfates, when loaded with absorbed sulfur dioxide. A method for employing the buffer as an immiscible aqueous phase as a separate trimming solvent to selectively absorb residual sulfur dioxide from a gas stream from which the bulk amount of sulfur dioxide is first removed by contact with a trialkyl phosphate solvent is disclosed. The method permits the trialkyl phosphate solvent to be regenerated and purged of salts at lower energy requirements.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: March 16, 1982
    Assignee: Trentham Corporation
    Inventors: H. Lee Trentham, John H. Crow, Farwell C. Boston