Mitsubishi Chemical Corporation

Mitsubishi Kasei Corporation

Hiroshi Takeo

Hiroshi Kameo

Masakatsu Hatano

Nobuyuki Murai

Souichi Orita

Mitsuharu Kobayashi

Akio Nakanishi

Kazuyuki Iwakai

Yoshio Kabata

Takeshi Takeuchi

Hidenobu Kajitani

Masayuki Shirato

Hidetoshi Tanaka

Masayuki Shirado

Disclosed is a method for producing a conjugated diene by subjecting a monoolefin having a carbon atom number of 4 or more and an oxygen gas to an oxidative dehydrogenation reaction by using a molybdenum-containing metal oxide catalyst under heat removal with a coolant, wherein an amount of molybdenum adhered onto a cooling heat transfer surface within a reactor is kept at not more than 20 mg/m, or not only a surface roughness Ra of a cooling heat transfer surface within a reactor is not more than 3 &#x3bc;m, but a temperature difference between a reaction temperature and a coolant temperature is in the range of from 5 to 220&#xb0; C.

Method for producing conjugated diene

A method for producing a polyoxyalkylene glycol by ring opening polymerization of a cyclic ether, wherein a zeolite (other than ZSM-5, ZSM-11 and Nu-5) is used as a catalyst.

Method for producing a polyoxyalkylene glycol and novel

A method for the production of polytetramethylene ether glycol wherein polymerization of tetrahydrofuran in the presence of fluorosulfonic acid is followed by hydrolysis of the resulting polymer, characterized by

Method for the production of polytetramethylene ether glycol

Growing community of inventors

Yokkaichi, Japan

Hiroshi Takeo