Patents by Inventor Johannes A. de Kraa

Johannes A. de Kraa 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 and apparatus for the removal of hydrogen sulphide from a gas mixture
    Patent number: 4671946
    Abstract: Process for the removal of hydrogen sulphide from a gas mixture comprising passing the gas mixture through a reactor (2) filled with catalyst for the conversion of hydrogen sulphide to carbonyl sulphide, and separating the gas mixture leaving reactor (2) in a separator (7) at a temperature below the boiling point of carbonyl suplhide in a lighter fraction and a heavier fraction in which the carbonyl sulphide is absorbed.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: June 9, 1987
    Assignee: Shell Oil Company
    Inventors: Johannes A. de Kraa, Jannes J. Zomerman