Patents by Inventor Rae Sung Chung

Rae Sung Chung 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 and composition for preparation of hydrogen peroxide
    Patent number: 8158100
    Abstract: The present invention relates to a method for the preparation of hydrogen peroxide through a continuous process, extracting hydrogen peroxide produced from reduction and oxidation of a working solution and recycling the oxidized working solution back to the reduction process, wherein the composition of the working solution, i.e. the composition of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone, is optimized to increase the solubility of the quinones and to improve the reaction rate. The working solution comprises 2-alkylanthraquinone, 2-tetrahydroalkylanthraquinone and an organic solvent, wherein 65-95 mol % of the alkyl group of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone is amyl and the remaining 5-35 mol % of the alkyl group is ethyl, and the molar ratio of 2-alkylanthraquinone to 2-tetrahydroalkylanthraquinone is from 4:6 to 1:9.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: April 17, 2012
    Assignee: OCI Company Ltd.
    Inventors: Se In Yang, Kyung Keun Yoo, Yong Il Kim, Tae Hee Shin, Deok Yun Kim, Sun Ki Seo, Rae Sung Chung, Do Sun Baik
  • METHOD AND COMPOSITION FOR PREPARATION OF HYDROGEN PEROXIDE
    Publication number: 20100284901
    Abstract: The present invention relates to a method for the preparation of hydrogen peroxide through a continuous process, extracting hydrogen peroxide produced from reduction and oxidation of a working solution and recycling the oxidized working solution back to the reduction process, wherein the composition of the working solution, i.e. the composition of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone, is optimized to increase the solubility of the quinones and to improve the reaction rate. The working solution comprises 2-alkylanthraquinone, 2-tetrahydroalkylanthraquinone and an organic solvent, wherein 65-95 mol % of the alkyl group of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone is amyl and the remaining 5-35 mol % of the alkyl group is ethyl, and the molar ratio of 2-alkylanthraquinone to 2-tetrahydroalkylanthraquinone is from 4:6 to 1:9.
    Type: Application
    Filed: March 6, 2009
    Publication date: November 11, 2010
    Applicant: OCI COMPANY LTD.
    Inventors: Se In Yang, Kyung Keun Yoo, Yong Il Kim, Tae Hee Shin, Deok Yun Kim, Sun Ki Seo, Rae Sung Chung, Do Sun Baik