Process for highly shape selective dewaxing which retards cataly

Details Process for highly shape selective dewaxing which retards cataly Process for highly shape selective dewaxing which retards cataly

1997-10-29

1999-09-14

Yildirim, Bekir L.

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 57, 208 89, 208 97, 208143, C10G 6508

Patent

active

059518480

ABSTRACT:
This application discloses a process for catalytically dewaxing a feedstock whereby the aging of the dewaxing catalyst is minimized. A variety of feedstocks which possess moderate levels of nitrogen and sulfur may be dewaxed in this invention. The feed is treated by a catalyst system comprising two catalysts acting in synergistic combination, a hydrotreating catalyst and a dewaxing catalyst. The hydrotreating catalyst is preferably loaded with noble metals and is capable of operating at higher than usual space velocities. The dewaxing catalyst is downstream of the hydrotreating catalyst. The dewaxing catalyst further comprises a constrained intermediate pore crystalline material which is loaded with a noble metal.

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patent: 4790928 (1988-12-01), Chang et al.
patent: 4810357 (1989-03-01), Chester et al.
patent: 4919788 (1990-04-01), Chen et al.
patent: 5246566 (1993-09-01), Miller
patent: 5275719 (1994-01-01), Baker, Jr. et al.

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