Mitsui Toatsu Chemicals, Incorporated

Tokio Nagayama

Tadamitsu Kiyoura

Yasuo Kogure

Kazuo Kanaya

Masanobu Ajioka

Toshihide Suzuki

Naoshi Fujimoto

Tadatoshi Honda

Kazunori Kawahara

Jun Kitagawa

Masami Murakami

Nobuhiko Horiuchi

Chlorine can be efficiently produced at a low temperature and with a high hourly space velocity by oxidizing hydrogen chloride with an oxygen-containing gas in the presence of a catalyst obtained by calcining a compound, which has in turn been obtained by reacting chromium nitrate, chromium chloride, the chromium salt of an organic acid or the like with ammonia, or by calcining a mixture of the compound and a silicon compound, preferably, at a temperature lower than 800.degree. C.

Production process of chlorine

A method for preparing acrolein or methacrolein comprises subjecting propylene, secondary propanol, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst represented by the following general formula (I):

Method for preparing acrolein or methacrolein

Manufacturing process of chlorine

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Yokohama, Japan

Tokio Nagayama