Mitsubishi Chemical Corporation

Mitsubishi Gas Chemical Company, Inc.

Japan Technological Research Association of Artificial Photosynthetic Chemical Process

Koetsu Endou

Shinichi Tanaka

Yoshinori Hara

Hirofumi Nakamura

Masamichi Onuki

Naoko Fujita

Hiroko Takahashi

Naoyuki Sakamoto

Seijiro Nishimura

Susumu Tsutsuminai

Misa Hara

Masahiro Kujime

Nobuo Toratani

The present invention addresses the problem of providing a bonded body which has a high airtightness and exhibits excellent durability under high-temperature and high-pressure conditions. This problem is solved by a bonded body in which a complex of a zeolite and an inorganic porous support, and a dense member are bonded together by an inorganic glass or an inorganic adhesive. The inorganic glass or the inorganic adhesive has a thermal expansion coefficient of 30×10/K to 90×10/K, and the inorganic glass has a softening point of 550° C. or lower. The present invention also addresses the problem of providing a method of efficiently producing an alcohol by installing a separation membrane in an alcohol synthesis reactor based on a bonding method that gives good sealing performance and durability under high-temperature and high-pressure conditions and in the presence of methanol vapor. This problem can be solved by an alcohol production method of obtaining an alcohol by allowing a raw material gas, which contains at least hydrogen and carbon monoxide and/or carbon dioxide, to react in the presence of a catalyst in a reactor. In the reactor for carrying out the reaction, an alcohol-selective permeable membrane bonded with a dense member is installed, and an alcohol generated by the reaction permeates and is recovered through the selective permeable membrane.

Bonded body, separation membrane module equipped with same, and method for producing alcohol

A subject for the invention is to obtain trans-1,4-cyclohexanedicarboxylic acid (t-CHDA) in a high concentration by efficiently isomerizing cis-1,4-cyclohexanedicarboxylic acid (c-CHDA) by a simple method. The invention provides: (1) a process for producing t-CHDA which comprises heating crude CHDA to 180&#xb0; C. or higher in an inert atmosphere and causing the t-CHDA formed by isomerization to precipitate in the molten c-CHDA while holding the crude CHDA at a temperature in the range of not lower than 180&#xb0; C. and less than the melting point of t-CHDA; (2) a process for producing t-CHDA, wherein crude CHDA which is powdery or granular is heat-treated at a temperature of not lower than the melting point of c-CHDA and lower than the melting point of t-CHDA to thereby isomerize the cis isomer to the trans isomer while maintaining the powdery or granular state; (3) a process for producing t-CHDA, wherein crude CHDA is held at a temperature of not lower than the melting point of c-CHDA and lower than the melting point of t-CHDA in an inert atmosphere while maintaining flowing to thereby obtain powdery or granular t-CHDA; and (4) a process for purifying crude CHDA in which crude CHDA obtained through the step of hydrogenating TPA or the like is heated in an atmosphere of an inert gas to volatilize and remove impurities.

Process for producing trans-1,4-cyclohexanedicarboxylic acid

A process for making cycloalkyldimethanol, includes hydrogenating at least one cycloalkyldicarboxylic acid and/or an alkyl ester thereof with a catalyst, to produce a cycloalkyldimethanol, where the catalyst contains ruthenium, tin and platinum. Also, a method for regenerating a used catalyst, includes contacting the used catalyst with a base, where the catalyst includes ruthenium, tin and platinum.

Process for the manufacture of cycloalkyldimethanol

A process for preparing 1,6-hexanediol comprising hydrogenating a starting material containing at least one compound selected from the group consisting of adipic acid, .epsilon.-hydroxycaproic acid, .epsilon.-caprolactone and oligomers of .epsilon.-caprolactone, preferably a substance recovered from a reaction mixture resulting from liquid phase oxidization of cyclohexane for the production of cyclohexanol and cyclohexanone, in a liquid phase in the presence of a solid catalyst containing ruthenium and tin.

Process for preparing 1, 6-hexanediol

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Yokohama, Japan

Koetsu Endou