Wax hydroisomerization process

Details Wax hydroisomerization process Wax hydroisomerization process

1996-03-28

1999-03-23

Myers, Helane

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Chemical treatment

208 18, 208 49, 208 58, 208 96, 208 59, 208 97, 585739, C10G 6512

Patent

active

058854380

ABSTRACT:
This invention discloses a process for producing a high Viscosity Index lubricant having a VI of at least 125 from a waxy hydrocarbon feed having a wax content of at least 40 wt %. The process comprises catalytically dewaxing waxy paraffins present in the feed by isomerization in the presence of hydrogen and in the presence of a low acidity large pore zeolite isomerization catalyst. This catalyst has a ratio of SiO.sub.2 /Al.sub.2 O.sub.3, as synthesized, of at least 50:1, wherein the catalyst is prepared in the absence of boron. The alpha value of the catalyst is no greater than 20. The catalyst comprises a noble metal hydroisomerization catalyst such as Pt. The feed may be hydrocracked prior to dewaxing with the large pore zeolite. The effluent of the process may also be further dewaxed by either solvent or catalytic means in order to achieve target pour point.

REFERENCES:
patent: 4419270 (1983-12-01), LaPierre et al.
patent: 4975172 (1990-12-01), Gawood
patent: 5164169 (1992-11-01), Rubin
patent: 5200168 (1993-04-01), Apellian et al.
patent: 5232579 (1993-08-01), Absil et al.
patent: 5238677 (1993-08-01), Apelian
patent: 5302279 (1994-04-01), Degnan

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