Patents by Inventor Fred C. Hohne

Fred C. Hohne 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 producing sodium carbonate, sodium bicarbonate and associated compounds
    Patent number: 5270023
    Abstract: A process for producing sodium carbonate from a variety of crude ores and brine containing sodium bicarbonate and sodium carbonate without the use of calcium carbonate. The process includes the steps of reacting the raw materials containing sodium bicarbonate and sodium carbonate with a bicarbonate filtrate containing ammonium chloride brine solution under heat, producing ammonia, carbon dioxide, and a mother liquor containing an aqueous solution of sodium chloride which is recycled. This solution may contain also sodium bicarbonate and sodium carbonate to enhance production. The mother liquor is separated and reacted with ammonia and carbon dioxide collected from the reacting step to crystalize sodium bicarbonate and produce an ammonium chloride brine solution which is recycled to react with the crude ore.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: December 14, 1993
    Inventors: Frank H. May, Fred C. Hohne