Patents by Inventor Michiyuki Hamada

Michiyuki Hamada 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 phenols
    Patent number: 5426245
    Abstract: A phenol is produced by reacting an aromatic compound with oxygen and hydrogen in the liquid phase in the presence of a catalyst comprising a noble metal of group VIII of the periodic table, which is supported on a carrier, and in the co-presence of a vanadium compound. The reaction is carried out either (i) by using as the catalyst a catalyst containing 0% to 0.15% by weight, based on the weight of the catalyst, of halogens, or (ii) further in the co-presence of a diketone compound of the following formula (1) or (2): ##STR1## wherein R.sup.1 and R.sup.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: June 20, 1995
    Assignee: Tosoh Corporation
    Inventors: Michiyuki Hamada, Hideyuki Niwa, Motohiro Oguri, Takanori Miyake