Patents by Inventor Charles T. Li

Charles T. Li 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 purifying geothermal steam
    Patent number: 4196183
    Abstract: Steam containing hydrogen sulfide is purified and sulfur recovered by passing the steam through a reactor packed with activated carbon in the presence of a stoichiometric amount of oxygen which oxidizes the hydrogen sulfide to elemental sulfur which is adsorbed on the bed. The carbon can be recycled after the sulfur has been recovered by vacuum distillation, inert gas entrainment or solvent extraction. The process is suitable for the purification of steam from geothermal sources which may also contain other noncondensable gases.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: April 1, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Charles T. Li