Patents by Inventor Fukuichi Aoki

Fukuichi Aoki 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 the ortho-alkylation of phenolic compounds
    Patent number: 4388478
    Abstract: This invention relates to a process for the selective ortho-alkylation of a phenolic compound having at least one ortho-positioned hydrogen atom by catalytically reacting the phenolic compound with an alcohol in the vapor phase. In this process, the reaction of the phenolic compound with the alcohol is carried out at a temperature of from 300.degree. to 550.degree. C. in the presence of a catalyst containing manganese oxide and one or more additives selected from group (A) consisting of germanium oxide, tin oxide and lead oxide, or a catalyst containing manganese oxide, one or more additives selected from the aforesaid group (A), and one or more additives selected from group (B) consisting of alkali metal oxides and alkaline earth metal oxides. The catalyst used in this invention exhibits not only excellent catalytic activity in the selective ortho-alkylation of phenols, continuous stability of the activity, good shapeability and good mechanical strength but also effective utilization of alcohols.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: June 14, 1983
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akihide Kudoh, Motoo Kawamata, Kazushi Ohshima, Makoto Kotani, Takeshi Tsuda, Fukuichi Aoki