Treatment of zeolites

Details Treatment of zeolites Treatment of zeolites

B - Operations, Transporting

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252/15, 260/675

B01J 29/04 (2006.01) B01J 29/40 (2006.01) C07C 4/06 (2006.01) B01J 29/65 (2006.01) B01J 29/70 (2006.01)

Patent

CA 1202943

- 15 - ABSTRACT OF THE DISCLOSURE A method is provided for enhancing the thermal and hydrothermal stability of certain small pore crystal- line siliceous materials having a silica/alumina mole ratio of from about 20 to about 200 and a total cation exchange capacity of from about 0.17 meg/gram to about 1.6 meq/gram which involves drying the hydrogen form of the crystalline material, contacting the dried material with anhydrous aluminum chloride vapor in a dry environ- ment, hydrolyzing the aluminum chloride vapor contacted material with water vapor and then calcining the hydro- lyzed material. ]

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