Patents by Inventor Jiing-Guang Tyen

Jiing-Guang Tyen 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 for processing spent ion-exchange resins
    Patent number: 7482387
    Abstract: A method for processing spent ion-exchange resins is provided by reducing the volume of the spent ion-exchange resins through a wet oxidation process and solidifying the residual wet oxidation slurry and the waste solution with high efficiency. The method comprises of using barium hydroxide as a neutralization agent to adjust pH of the reaction solution so as to drive away ammonia from the solution, and as a conversion agent to convert sulfuric acid and sulfate obtained in the reaction into barium sulfate. The process can solidify the wet oxidation residue slurry and waste solution with high efficiency.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: January 27, 2009
    Assignee: Institute of Nuclear Energy
    Inventors: Ching-Tsuen Huang, Tzeng-Ming Liu, Jiing-Guang Tyen
  • Method for processing spent ion-exchange resins
    Publication number: 20050182147
    Abstract: A method for processing spent ion-exchange resins is provided by reducing the volume of the spent ion-exchange resins through a wet oxidation process and solidifying the residual wet oxidation slurry and the waste solution with high efficiency. The method comprises of using barium hydroxide as a neutralization agent to adjust pH of the reaction solution so as to drive away ammonia from the solution, and as a conversion agent to convert sulfuric acid and sulfate obtained in the reaction into barium sulfate. The process can solidify the wet oxidation residue slurry and waste solution with high efficiency.
    Type: Application
    Filed: February 17, 2004
    Publication date: August 18, 2005
    Inventors: Ching-Tsuen Huang, Tzeng-Ming Liu, Jiing-Guang Tyen
  • Co-solidification of low-level radioactive wet wastes produced from BWR nuclear power plants
    Patent number: 6436025
    Abstract: This invention discloses a method for the co-solidification of low-level radioactive wet wastes of BWR nuclear power plants, including concentrate waste, spent ion exchange resins and sludge wastes etc., with very high volume efficiency. In this invention, for promoting the stability of the solidified waste, sodium sulfate in the concentrate solution is converted to sodium hydroxide and barium sulfate by reacting with barium hydroxide. The conversion product barium sulfate possessing high density and stability is insoluble and used as a fine aggregate material in the solidified waste. Sodium hydroxide is used to stabilize ion exchange resins and to form a highly water-durable solidified waste form with silicates and phosphates in the solidification agent mixture. The solidification agent used in this invention is a formulated powder mixture completely made from inorganic materials. Therefore, there is no aging problem of the solidified waste.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: August 20, 2002
    Assignee: Institute of Nuclear Energy Research
    Inventors: Ching-Tsuen Huang, Jiing-Guang Tyen, Da-Luh Lu, Tzeng-Ming Liu, Tsye-Shing Lee