Cascade dewaxing process

Details Cascade dewaxing process Cascade dewaxing process

C - Chemistry, Metallurgy

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C10G 65/04 (2006.01) B01J 29/06 (2006.01) C10G 45/60 (2006.01) C10G 45/62 (2006.01) C10G 45/64 (2006.01) C10G 65/02 (2006.01) C10G 67/04 (2006.01) C10G 73/02 (2006.01)

Patent

CA 1274204

Abstract Hydrocarbon feedstocks are dewaxed in a cascade process by contacting a waxy feedstock with a large pore crystalline zeolite catalyst and then with a medium pore crystalline zeolite catalyst. Preferably both contactings are performed in the presence of added hydrogen, each zeolite being associated with a hydrogenation/ dehydrogenation component: the first contacting may function as a hydroisomerisation step. In certain applications a preferred large pore zeolite is zeolite beta. In certain applications a preferred medium pore zeolite is ZSM-11. Some degree of interstage separation can be adopted.

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