Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Patent
1988-09-22
1990-06-26
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
502328, 502340, 502344, B01J 2106, B01J 2302, B01J 2352, B01J 2378
Patent
active
049372190
ABSTRACT:
An ultra-fine gold particle-immobilized alkaline earth metal compound having ultra-fine gold particles immobilized on an alkaline earth metal compound is useful as a catalyst or as an inflammable gas sensor. This compound is produced by (1) adding an aqueous solution of a gold compound dropwise to an aqueous solution containing an alkaline earth metal compound and having a pH value kept in the range of 7 to 11 thereby inducing immobilization of gold hydroxide on the compound, separating from the solution the gold hydroxide-immobilized compound, and calcining the separated compound at a temperature in the range of 80.degree. to 800.degree. C., (2) by adding a reducing agent to an aqueous solution of an alkaline earth metal having a gold compound dissolved therein, (3) by adding carbon dioxide gas or an acidic aqueous solution to an aqueous solution containing a gold compound and an alkaline earth metal compound thereby inducing immobilization of gold hydroxide on the alkaline earth metal compound, separating from the solution the gold hydroxide-immobilized compound, and calcining the separated compound at a temperature in the range of 100.degree. to 800.degree. C., or (4) by coprecipitating a gold compound and an alkaline earth metal and calcining the coprecipitate at a temperature in the range of 80.degree. to 800.degree. C.
Haruta Masatake
Kobayashi Tetsuhiko
Nakahara Yoshiko
Tsubota Susumu
Agency of Industrial Science and Technology
Ministry of International Trade and Industry
Shine W. J.
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