Patents by Inventor Monroe Davis

Monroe Davis 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).

  • Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide
    Patent number: 7258848
    Abstract: The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as a scrubbing agent to convert ammonia to an ammonium salt. Control of pH and stripping in combination with reboiler or evaporators reduces hydrogen sulfide concentration. The ammonium salt is produced as an aqueous solution, which may crystallized to form a solid product. The ammonium salt solution or solid may be used as a fertilizer.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: August 21, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Benny E. Blackwell, Luis Alberto Chu, Monroe Davis, Wayne B. Ely, Robert Joseph Flowers, Steven Lamar Grise, Zeru Berhane Tekie