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    • 4. 发明授权
    • Ultra-fine gold particle-immobilized alkaline earth metal compounds and
methods for production thereof
    • 超细金颗粒固定碱土金属化合物及其制备方法
    • US4937219A
    • 1990-06-26
    • US247651
    • 1988-09-22
    • Masatake HarutaSusumu TsubotaTetsuhiko KobayashiYoshiko Nakahara
    • Masatake HarutaSusumu TsubotaTetsuhiko KobayashiYoshiko Nakahara
    • B01D53/86B01J23/66B01J27/232B01J35/02B01J37/03C01F5/02C01F5/24C01F11/02C01G23/00G01N27/16
    • B01J37/031B01D53/8628B01D53/864B01J23/66B01J27/232G01N27/16
    • 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.
    • 具有固定在碱土金属化合物上的超细金粒子的超细金粒子固定碱土金属化合物可用作催化剂或可燃性气体传感器。 该化合物通过(1)将金化合物的水溶液滴加到含有碱土金属化合物的水溶液中并且将pH值保持在7〜11的范围内,从而引发金氢氧化物固定在化合物上, 从金属氢氧化物固定化合物溶液中分离,并在80〜800℃的温度范围内煅烧分离出的化合物,(2)通过向碱土金属的水溶液中加入还原剂 金化合物溶解在其中,(3)通过将二氧化碳气体或酸性水溶液加入到含有金化合物和碱土金属化合物的水溶液中,从而导致氢氧化物固定在碱土金属化合物上,与溶液分离 金氢氧化物固定化合物,并在100-800℃的温度下煅烧分离的化合物,或(4)通过共沉淀金化合物 和碱土金属,并在80至800℃的温度下煅烧共沉淀物。