Patents by Inventor Muneo Ito

Muneo Ito 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).

  • Catalyst for alkylation of phenols
    Patent number: 5128304
    Abstract: A method of alkylating phenols which comprises reacting phenols having a hydrogen atom in at least one of the ortho-positions with regard to the hydroxyl group with an alcohol in a gaseous phase under heat in the presence of a catalyst comprising iron oxide, silica, chromium oxide, germanium oxide and an alkali metal compound. The catalyst exhibits a long catalytic activity duration and decreases frequency of regeneration and replacement of catalysts.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: July 7, 1992
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventor: Muneo Ito
  • Method for alkylation of phenols, and catalyst therefor
    Patent number: 5059727
    Abstract: A method of alkylating phenols which comprises reacting phenols having a hydrogen atom in at least one of the ortho-positions with regard to the hydroxyl group with an alcohol in a gaseous phase under heat in the presence of a catalyst comprising iron oxide, silica, chromium oxide, germanium oxide and an alkali metal compound. The catalyst exhibits a long catalytic activity duration and decreases frequency of regeneration and replacement of catalysts.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: October 22, 1991
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventor: Muneo Ito
  • Process for producing a 2-tertiary-alkyl substituted anthraquinones
    Patent number: 4305879
    Abstract: A process for producing a 2-tertiary-alkyl substituted anthraquinone, characterized by carrying out catalytic oxidation of a diphenylmethane type compound having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are different from each other, and independently hydrogen or tertiary-alkyl having 4 or 5 carbon atoms with the proviso that one of R.sub.1 and R.sub.2 is hydrogen, and R.sub.3 is alkyl having 1-3 carbon atoms, in vapor phase in the presence of a catalyst containing vanadium and cerium is disclosed.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: December 15, 1981
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Akitoshi Sugio, Shizuo Togo, Muneo Ito, Chiharu Nishizawa
  • Process for producing a 2-tertiary-alkyl substituted anthraquinone
    Patent number: 4036861
    Abstract: A process for producing a 2-tertiary-alkyl substituted anthraquinone, characterized by carrying out catalytic oxidation of a diphenylmethane type compound having the formula ##STR1## wherein R.sub.1 and R.sub.2 are different from each other, and independently hydrogen or tertiary-alkyl having 4 and 5 carbon atoms with the proviso that one of R.sub.1 and R.sub.2 is hydrogen, and R.sub.3 is alkyl having 1-3 carbon atoms, in vapor phase in the presence of a catalyst comprising vanadium oxide is disclosed.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: July 19, 1977
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Shizuo Togo, Muneo Ito, Chiharu Nishizawa, Michio Ohba
  • Process for ortho-alkylation of phenol compounds
    Patent number: 3953529
    Abstract: A process for alkylating the ortho-position of a phenol compound which comprises bringing a phenol compound containing at least one hydrogen atom at its ortho-position and an alcohol into contact with a catalyst in the gaseous phase, said catalyst being selected from the group consisting ofA. a mixture of iron oxide and silica in which the atomic ratio of Fe to Si is 100 : 0.03 - 200, andB. a mixture of iron oxide, silica and chromium oxide in which the atomic ratio of Fe to Si to Cr is 100 : 0.1 - 5 : 0.1 - 5.
    Type: Grant
    Filed: June 4, 1974
    Date of Patent: April 27, 1976
    Assignee: Mitsubishi Gas Chemical Co. Inc.
    Inventors: Eiichi Yonemitsu, Shizuo Togo, Kenichiro Hashimoto, Muneo Ito, Chiharu Nishizawa, Noboru Hara