Patents by Inventor William R. Erickson

William R. Erickson 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).

  • Method of selectively removing adsorbed calcium and magnesium from cation exchange resins
    Patent number: 4363880
    Abstract: Adsorbed calcium is selectively removed from cation exchange resins in the presence of adsorbed magnesium by eluting the resin with aqueous sulfuric acid saturated with CaSO.sub.4 and undersaturated with MgSO.sub.4 to obtain a solution supersaturated with CaSO.sub.4 from which the CaSO.sub.4 can be readily precipitated. The magnesium is subsequently removed from the resin by eluting with aqueous sulfuric acid, such as 20-70% H.sub.2 SO.sub.4. The method is advantageously used in the regeneration of cation exchange resins, such as the loaded resins used for treatment of phosphate rock-derived phosphoric acid.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: December 14, 1982
    Assignee: American Petro Mart, Inc.
    Inventors: Solon G. Whitney, William R. Erickson