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US4912275A Ammonium activation of zeolites in the presence of gaseous ammonia 失效
在气态氨存在下沸石的铵活化

Ammonium activation of zeolites in the presence of gaseous ammonia
摘要:
Alumina-composited zeolite catalysts are activated by contact with an aqueous ammonium solution under ammonia gas pressure such that a pH of at least about 8 is maintained in the solution. The treated zeolite may thereafter be calcined without prior ammonium-exhange to provide the zeolite in the hydrogen form. Catalysts which are activated in this manner are useful for converting alcohols and/or ethers to hydrocarbons including aromatics.
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