Patents by Inventor Steven Robert Johnson

Steven Robert Johnson 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).

  • Minimizing evaporator scaling and recovery of salts during gasification
    Patent number: 6086722
    Abstract: A process for minimizing evaporator scaling during the recovery of liquids and solids from the aqueous effluent discharged during a partial oxidation gasification, wherein the aqueous effluent contains ammonium chloride (NH.sub.4 Cl). The aqueous effluent is evaporated to produce a distillate water and a brine having an NH.sub.4 Cl concentration of about 10 to 60 weight percent. The brine can be further concentrated and ammonium chloride crystals are recovered. The distillate water is recycled to the gasification reaction. No effluent discharges to the environment.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: July 11, 2000
    Assignee: Texaco Inc.
    Inventors: George Henry Webster, Jr., Byron Von Klock, Dinh-Cuong Vuong, John Saunders Stevenson, Steven Robert Johnson