Patents by Inventor Youji Takenouchi

Youji Takenouchi 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 producing ammonia and sulfur dioxide
    Patent number: 4990319
    Abstract: A process for producing NH.sub.3 and SO.sub.2 from ammonium sulfate, which comprises(i) reacting ammonium sulfate with a metal oxide or hydroxide at a temperature of not more than 200.degree. C. to form NH.sub.3, water and a metal sulfate and recovering NH.sub.3,(ii) decomposing the metal sulfate in the presence of a reducing agent to form a metal oxide and SO.sub.2 and recovering SO.sub.2, and(iii) recycling the metal oxide to step (i) as such or after it is converted to a metal hydroxide.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: February 5, 1991
    Assignees: Kuraray Co., Ltd., Kyowa Gas Chemical Industry Co., Ltd., JGC Corporation
    Inventors: Youji Takenouchi, Katsuhiko Nishiguchi, Kunio Abe