Mitsubishi Gas Chemical Company, Inc.

Masami Orisaku

Takashi Suzuki

Rieko Nakano

Takeshi Koyama

Akira Mori

Takamasa Kawakami

Kansei Izaki

Shoichiro Hashimoto

Fine silicon nitride powders, fine silicon carbide powders, or fine powdery mixture of silicon nitride and silicon carbide are prepared by vapor phase reaction of an aminosilane compound, a cyanosilane compound, a silazane compound, an alkoxysilane compound or a siloxane compound and heat treatment of the resulting fine powders in a non-oxidizing gas atmosphere.

Process for preparing silicon nitride, silicon carbide or fine powdery

Fine spherical amorphous powder represented by the general formula:

Fine amorphous powder and process for preparing fine powdery mixture of

p-Cresol is produced in one step by direct oxidation of p-tolualdehyde with a peroxide in formic acid as a solvent while keeping 3 to 15% by weight of water in formic acid on the basis of formic acid and a reaction temperature in a range of 50.degree. to 150.degree. C.

Process for producing p-cresol

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Matsudo, Japan

Masami Orisaku