Patents by Inventor Felix M. F. Mok

Felix M. F. Mok 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).

  • Perchlorate removal from concentrated salt solutions using amphoteric ion-exchange resins
    Patent number: 8882985
    Abstract: A process for reducing the concentration of perchlorate in an aqueous concentrated multi-component salt solution comprising treating the salt solution with an amphoteric ion-exchange resin to provide an adsorbed perchlorate and multi anion-containing resin and a perchlorate depleted solution; and removing the perchlorate depleted solution. The multi-anion are selected from chloride, chlorate, perchlorate, sulphate, and dichromate, present in electrolytic processes for the production of sodium chlorate.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: November 11, 2014
    Assignee: Chemetics Inc.
    Inventors: Felix M. F. Mok, Gilbert Thibault, Thomas S. Drackett
  • PERCHLORATE REMOVAL FROM CONCENTRATED SALT SOLUTIONS USING AMPHOTERIC ION-EXCHANGE RESINS
    Publication number: 20120152759
    Abstract: A process for reducing the concentration of perchlorate in an aqueous concentrated multi-component salt solution comprising treating the salt solution with an amphoteric ion-exchange resin to provide an adsorbed perchlorate and multi anion-containing resin and a perchlorate depleted solution; and removing the perchlorate depleted solution. The multi-anion are selected from chloride, chlorate, perchlorate, sulphate, and dichromate, present in electrolytic processes for the production of sodium chlorate.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 21, 2012
    Applicant: CHEMETICS INC.
    Inventors: Felix M.F. Mok, Ronald P. Van Heek, Gilbert Thibault, Thomas S. Drackett
  • Process for removing sulphate from aqueous solution
    Patent number: 5618437
    Abstract: A method for removing sulphate ions from an aqueous solution of an alkali metal halide containing sulphate ions, which method comprises contacting said solution with a particulate, composite ion-exchange material comprising a hydrous oxide of a metal selected from the group consisting of titanium, zirconium and cerium, dispersed on a support comprising a brine solution compatible material. Preferably the compatible material is selected from hydrous oxides of titanium, cerium and zirconium. An improved cost-effective practical method of sulphate removal is provided.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: April 8, 1997
    Assignee: Chemetics International Company Ltd.
    Inventors: Judith G. Ulan, Kenneth R. Maycock, Thomas S. Drackett, Felix M. F. Mok