Patents by Inventor Sarkis H. Kalfayan

Sarkis H. Kalfayan 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).

  • Coal desulfurization process
    Patent number: 4081250
    Abstract: A method of chlorinolysis of coal in an organic solvent at a moderate temperature and atmospheric pressure has been proven to be effective in removing sulfur, particularly the organic sulfur, from coal. Chlorine gas is bubbled through a slurry of moist coal in chlorinated solvent. The chlorinated coal is separated, hydrolyzed and then dechlorinated. Preliminary results of treating a high sulfutr (4.77%S) bituminous coal show that up to 70% organic sulfur, 90% pyritic sulfur and 76% total sulfur can be removed. The treated coal is dechlorinated by heating at 500.degree. C. The presence of moisture helps to remove organic sulfur.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: March 28, 1978
    Assignee: California Institute of Technology
    Inventors: George C. Hsu, George R. Gavalas, Partha S. Ganguli, Sarkis H. Kalfayan