Hydrothermal activation of acid zeolites with alumina

Details Hydrothermal activation of acid zeolites with alumina Hydrothermal activation of acid zeolites with alumina

B - Operations, Transporting

01

J

252/15

B01J 29/28 (1985.01)

Patent

CA 1202944

- 16 - HYDROTHERMAL ACTIVATION OF ACID ZEOLITES WITH ALUMINA Abstract of the Disclosure In the process for activating high-silica zeolite catalyst with alumina activating agent wherein a cyrstalline zeolite catalyst having 2 silica:alumina ratio greater than 70 and a constraint index of 1 to 12 is contacted with the activating agent at elevated temperature, the improvement which comprises: hydrothermally treating an intimate mixture of zeolite catalyst and an effective amount or activating agent in contact with an aqueous liquid phase under reaction conditions to increase the cracking activity of the catalyst. The activated catalyst product may be produced by hydrothermal treatment of a composite mixture of zeolite and hydrated alumina binder material. The preferred zeolites are acid ZSM-5 type crystalline materials having a silica: alumina ratio of at least 2000:1.

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