Patents Assigned to Chemical Separations Corporation
  • Removal of chromium, chromate, molybdate and zinc
    Patent number: 4057494
    Abstract: Trivalent chromium, zinc, hexavalent chromate and molybdate can be removed from a fluid by contacting the fluid with an ion exchange resin bed comprising a mixture of a weak base anion exchange resin and a weak or strong acid cation exchange resin in hydrogen form to remove the metal values.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: November 8, 1977
    Assignee: Chemical Separations Corporation
    Inventor: Randhir C. Chopra
  • Preferential removal of ammonia and phosphates
    Patent number: 3984313
    Abstract: Sewage water containing many pollutants including ammonia and phosphates is treated so that the ammonia and phosphates are preferentially removed through ion exchange while the other contaminants are allowed to remain in the water. Ferric hydroxide is deposited within the matrix of strong acid type cation exchange resin and the resin is rejuvenated with sodium hydroxide.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: October 5, 1976
    Assignee: Chemical Separations Corporation
    Inventor: Irwin R. Higgins
  • Removal of chromium, chromate, molybdate and zinc
    Patent number: 3972810
    Abstract: Trivalent chromium, hexavalent chromate, molybdate and zinc are removed from a fluid. The fluid is simultaneously treated with a weak base anion exchange resin and a weak acid cation exchange resin to remove the chromium, chromate, molybdate and/or zinc.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: August 3, 1976
    Assignee: Chemical Separations Corporation
    Inventor: Randhir C. Chopra