Patents by Inventor Yung-Chu Peng

Yung-Chu Peng 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).

  • Process for preparing an ortho-alkylated phenol
    Patent number: 5175377
    Abstract: The present invention provides an improved process for the production of ortho-alkyl phenols by vapor phase reaction of a phenol having at least one ortho-hydrogen with an alcohol, the improvement comprises soaking manganic oxide in an aqueous solution of alkali metal salt, separating the soaked manganic oxide from the solution, drying and calcining the soaked manganic oxide at a temperature of 300.degree.-600.degree. C. for a period of 1-3 hours to form an alkali metal oxide thereon, wherein the weight ratio of the alkali metal oxide to the manganic oxide is 0.5-0.0001 wt %, preferably 0.1-0.001 wt %.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: December 29, 1992
    Assignee: China Technical Consultants, Inc.
    Inventors: Ling-Wen Ho, Trong-Goang Lin, Yung-Chu Peng
  • Catalyst for preparation of ortho-alkylated phenols
    Patent number: 5098879
    Abstract: The present invention provides an improved manganic oxide catalyst for the production of ortho-alkyl phenols by vapor phase reaction of a phenol having at least one ortho-hydrogen with an alcohol, the improvement comprises soaking manganic oxide in an aqueous solution of alkali metal salt, separating the soaked manganic oxide from the solution, drying and calcining the soaked manganic oxide at a temperature of 300.degree.-600.degree. C. for a period of 1-3 hours to form an alkali metal oxide thereon, wherein the weight ratio of the alkali metal oxide to the manganic oxide is 0.5-0.0001 wt %, preferably 0.1-0.0001 wt %.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: March 24, 1992
    Assignee: China Technical Consultants, Inc.
    Inventors: Ling-Wen Ho, Trong-Goang Lin, Yung-Chu Peng