Mitsubishi Chemical Corporation

Mitsubishi Petrochemical Company Limited

Yuji Ohgomori

Masatoshi Takagi

Shuji Ichikawa

Naoko Sumitani

Takahiro Yoneyama

Hiroshi Iwane

Haruhiko Kusaka

Masashi Inaba

Hidekazu Miyagi

Yasuyo Saito

Masayuki Honda

Takamichi Suzuki

Katsufumi Kujira

Masashi Yamanashi

Akiko Fujita

Noriko Shimizu

Tetsuro Murayama

Katsuaki Hasegawa

A tetracarboxylic acid compound of formula (1) or (2) wherein A represents a divalent group; X, Xand Xrespectively represent a hydrogen atom or the like; R, R, Rand Rrespectively represent a carboxyl group or an acid anhydride group; n represents 1 or 2; and B represents a cyclic group.

Tetracarboxylic acid compound, polyimide thereof, and production method thereof

An organic metal complex having the formula (I):wherein X, M, X-Xand R-Rare as defined herein, having near infrared absorption with visible light transmittance.

Organic metal complex, infrared-absorbing dye and infrared absorption filter containing it, and filter for plasma display panel

A process for producing an unsymmetrical chain carbonic acid ester is described, which comprises reacting a first symmetrical chain carbonic acid ester with a second symmetrical chain carbonic acid ester or a monohydric alcohol in the presence of a catalyst comprising as an active catalyst component an oxide of at least one element selected from the Group IIIB elements of the periodic table.

Process for producing unsymmetrical chain carbonic acid ester

The present invention relates to a method of producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide, and oxygen, wherein the reaction is carried out in the presence of a catalyst comprising:

Method of producing aromatic carbonate

A process for producing 1,4-butanedial monoacetal by reacting acrolein acetal with a synthesis gas containing carbon monoxide and hydrogen, in the presence of a rhodium catalyst and an accelerator of formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each, independently, denote a hydrogen atom, a C.sub.1 -C.sub.20 alkyl group or a C.sub.6 -C.sub.20 aryl group, or R.sup.1 and R.sup.2 together form a --(CH.sub.2).sub.n -- group, n is an integer of from 2 to 7, R.sup.3 and R.sup.4 each, independently, denote halogen or a trifluoromethyl group, and p and q are each, independently, an integer of from 0 to 3, which process can also be extended to the hydroformylation of other compounds which contain an olefin group in a terminal position.

Process for the selective hydroformylation of terminal olefin groups and

The present invention relates to a method of producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide and oxygen using a catalyst system for suppressing the production of aryl aromatic o-hydroxycarboxylate as a by-product. The catalyst system consists of the following compounds:

A process for preparing 2-hexene-1,6-dial comprising dimerizing 2-propenal in the presence of an organometallic compound of the group VIII metal. The desired compound can be obtained under mild conditions with industrial advantages.

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Ibaraki, Japan

Yuji Ohgomori