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Title:
CATALYST FOR PRODUCING CHLORINE FROM HYDROGEN CHLORIDE
Document Type and Number:
Japanese Patent JP3270670
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain a catalyst used when chlorine is produced by oxidizing hydrogen chloride and capable of withstanding long-term use under a low oxygen concn. condition by adding copper, alkali metal and rare earth metal or chromium, copper, alkali metal and rare earth metal to a catalyst based on chromium oxide.
SOLUTION: This catalyst used when chlorine is produced by oxidizing hydrogen chloride is prepared by adding copper, alkali metal and rare earth metal or chromium, copper, alkali metal and rare earth metal to a catalyst based on chromium oxide. The catalyst based on chromium oxide is obtained by baking a mixture of a reaction product of a chromium salt with ammonia or a compd. discharging ammonia and a silicon compd. at 800°C or lower. Further, potassium is used as alkali metal and lanthanum is used as rare earth metal and copper, potasium and lanthanum are respectively added to chromium in the catalyst in ratios of 0.01-0.3, 0.005-0.2 and 0.01-0.3.


Inventors:
Miyata, Katsuji
Morizaki, Joji
Hirayama, Teruo
Gamachi, Hironori
Yamada, Kunihiro
Application Number:
JP1995000292352
Publication Date:
April 02, 2002
Filing Date:
November 10, 1995
Export Citation:
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Assignee:
MITSUI TOATSU CHEM INC
International Classes:
C01B7/04; B01J23/86; B01J23/94; (IPC1-7): B01J23/86; B01J23/94; C01B7/04