Patents Assigned to Mitsubishi Gas Chemical Co. Inc.
  • Process for producing methyl formate
    Patent number: 4149009
    Abstract: A process for producing methyl formate which comprises dehydrogenating methanol in vapor phase in the presence as a catalyst of copper, zirconium and zinc and optionally aluminum is disclosed.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: April 10, 1979
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Mikio Yoneoka, Minoru Osugi
  • Process for manufacture of L(+)-tartaric acid or salts thereof
    Patent number: 4092220
    Abstract: Conversion of cis-epoxysuccinic acid or salts thereof into L(+)-tartaric acid or salts thereof is obtained by the agency of hydrolase.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: May 30, 1978
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Yoshihiro Tsurumi, Tomio Fujioka
  • Stabilized polyphenylene ether resin composition
    Patent number: 3954904
    Abstract: Polyphenylene ether resins are stabilized with a substituted dicarboxylic acid dihydrazide.
    Type: Grant
    Filed: October 30, 1974
    Date of Patent: May 4, 1976
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Takanari Nawata, Masao Okabe, Masatsugu Matsunaga, Masaharu Kimura, Norio Sayama
  • 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
  • Method for promoting bleaching employing chloro-s-triazines
    Patent number: 3950126
    Abstract: A method for promoting the bleaching action of a peroxy bleaching agent which comprises using as an activating agent for the bleaching agent at least one chloro-s-triazine derivative of the formula ##SPC1##Wherein A.sub.1 and A.sub.2 are substituents which are the same or different and each represents a chlorine atom or (1) --OR.sub.1 wherein R.sub.1 is an alkyl group containing not more than 12 carbon atoms or (2) ##EQU1## wherein R.sub.2 and R.sub.3 are the same or different and each represents a hydrogen atom or an alkyl group containing not more than 12 carbon atoms, with the proviso that A.sub.1 and A.sub.2 are not chlorine atoms at the same time.
    Type: Grant
    Filed: July 24, 1973
    Date of Patent: April 13, 1976
    Assignee: Mitsubishi Gas Chemical Co. Inc.
    Inventors: Junichiro Sugano, Minoru Kakuda, Tokuzo Tsuiki
  • Process for methanol synthesis
    Patent number: 3939191
    Abstract: Catalyst comprising oxides of copper, zinc and boron in an atomic ratio of copper: zinc: boron of 20 to 70: 15 to 50: 0.3 to 5.3 is used for methanol synthesis from hydrogen and carbon oxides at a reaction pressure of 20 to 500 kg/cm.sup.2, reaction temperature of 150.degree. to 350.degree.C and space velocity of 2,000 to 5 .times. 10.sup.4 hr.sup..sup.-1.The catalyst has a higher catalytic efficiency, and improved heat resistance and durability.
    Type: Grant
    Filed: December 18, 1973
    Date of Patent: February 17, 1976
    Assignee: Mitsubishi Gas Chemical Co. Inc.
    Inventors: Setunobu Asano, Tadasi Nakamura