Patents Assigned to Gardinier, Inc.
  • Process for partial removing of impurities from a wet process phosphoric acid
    Patent number: 4493820
    Abstract: A process for the partial removal of impurities present in a wet process phosphoric acid used in the production of granulated mono- or di-ammonium phosphate fertilizers in order to control the grade of the final product. All or a portion of the liquid from the primary scrubbers is clarified to remove the precipitated impurities and the clarified flow is then fed into the reactor along with any unclarified portions of the primary scrubber liquid.
    Type: Grant
    Filed: October 1, 1982
    Date of Patent: January 15, 1985
    Assignee: Gardinier, Inc.
    Inventor: Herbert J. Clausen
  • Method of purifying uranium tetrafluoride hydrate and preparing uranium (VI) peroxide hydrate using a fluoride complexing agent
    Patent number: 4258012
    Abstract: A method of preparing uranium (VI) peroxide hydrate from uranium tetrafluoride hydrate, comprising the steps of digesting uranium tetrafluoride hydrate in an aqueous acid in the presence of a fluoride complexing agent to produce an aqueous uranium solution, adjusting the aqueous uranium solution to a pH between about 1 to about 3, filtering the aqueous uranium solution to remove undissolved material, reacting the aqueous uranium solution with peroxide to precipitate uranium (VI) peroxide hydrate, and separating the precipitated uranium (VI) peroxide hydrate.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: March 24, 1981
    Assignee: Gardinier, Inc.
    Inventors: Agustin J. Barreiro, Charles M. T. Lowe, JoAnne LeFever, Ronald L. Pyman
  • Method of purifying phosphoric acid after solvent extraction
    Patent number: 4250155
    Abstract: A method of purifying phosphoric acid after solvent extraction to remove residual amounts of an immiscible organic carrier including contacting the phosphoric acid with a sorbent which sorbs or takes up the residual amount of organic carrier and separating the phosphoric acid from the organic carrier-laden sorbent. The method is especially suitable for removing residual organic carrier from phosphoric acid after solvent extraction uranium recovery.
    Type: Grant
    Filed: June 9, 1978
    Date of Patent: February 10, 1981
    Assignee: Gardinier, Inc.
    Inventors: Anastasios P. Kouloheris, JoAnne LeFever
  • Method of purifying uranium tetrafluoride hydrate and preparing uranium (VI) peroxide hydrate using a fluoride precipitating agent
    Patent number: 4247522
    Abstract: A method of preparing uranium (VI) peroxide hydrate from uranium tetrafluoride hydrate, comprising the steps of digesting uranium tetrafluoride hydrate in an aqueous acid in the presence of a fluoride precipitating agent to produce an aqueous uranium solution, filtering the aqueous uranium solution to remove precipitated fluorides and undissolved material, adjusting the aqueous uranium solution to a pH between about 1 to about 3, reacting the aqueous uranium solution with peroxide to precipitate uranium (VI) peroxide hydrate, and separating the precipitated uranium (VI) peroxide hydrate.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: January 27, 1981
    Assignee: Gardinier, Inc.
    Inventors: Ronald L. Pyman, JoAnne LeFever