Mitsubishi Chemical Industries Limited

Mitsubishi Monsanto Chemical Co., Ltd.

Takeshi Okano

Hisanori Fujita

Yoshimitsu Kobayashi

Masaaki Kanayama

Naoto Wada

Toshiharu Yokoyama

Yasuo Oguri

Junji Saito

Tetsuo Masuyama

Akio Tamaru

Mitsuo Uchida

Kunichi Matsushita

Tokuzo Kurata

Takao Kaneko

Kunihiko Ohfuchi

Eiichiro Nishihara

Saburo Nagashima

Yoshifumi Murata

An epitaxial wafer for producing arrays of GaAsP-LEDs comprises, in the GaAs.sub.1-x P.sub.x layer with varying X, a layer region(s) with a discontinuous variance of x along the thickness of the GaAs.sub.1-x P.sub.x layer. This layer region(s) contribute to a uniformity in the brightness of the light emission of LEDs formed in the epitaxial wafer.

Method of making a gallium arsenide phosphide-, mixed crystal-epitaxial

Gallium arsenide phosphide mixed crystal epitaxial wafer with a graded

In the boat growth method of the IIIb-Vb group compound, the quartz boat is tridymitized on at least the surface thereof so as to prevent wetting of the boat due to the melt of the compound and hence to enhance the yield of a single crystal.

Growth method of an organic compound single crystal and a boat used

Nitrogen oxides in exhaust gases are catalytically reduced in the presence of oxygen and ammonia at 200.degree. to 600.degree. C. over a catalyst of at least one catalyst component selected from the group consisting of compounds of metals of Groups 1B, 5A, 6A, 7A and 8 of the periodic table, and lanthanides and tin which is supported on a specific carrier comprising a main component of calcium silicate.

Catalytic reduction of nitrogen oxides

A process for producing styrene from 4-vinylcyclohexene by contacting it with molecular oxygen in a gaseous phase and at an elevated temperature in the presence of a catalyst which contains tin, antimony and oxygen.

Process for the preparation of styrene

Alkylene glycol esters are produced by the reaction of an olefin, a carboxylic acid and molecular oxygen employing a bromine-containing substance and a nitrogen oxide as a catalyst.

Process for producing alkylene glycol esters

Alkylene glycol esters are produced by the reaction of an olefin, a carboxylic acid and molecular oxygen employing an iodine-containing substance and a nitrogen oxide as a catalyst.

A copper catalyst obtained by reducing a copper compound with formaldehyde in the presence of an alkali in an aqueous medium is an excellent catalyst for the hydrolysis of an unsaturated nitrile to an amide. Furthermore, when a copper compound is combined with another element, which is selected from a specific group of elements, during the preparation of the copper catalyst, a catalyst is formed which has an increased hydrolysis activity and an increased catalyst lifetime.

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Machida, Japan

Takeshi Okano