Wax hydroisomerization process employing a boron-free catalyst

Details Wax hydroisomerization process employing a boron-free catalyst Wax hydroisomerization process employing a boron-free catalyst

1996-03-28

1999-11-02

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, 208111, 585739, C10G 6512

Patent

active

059763515

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, and an alpha value of not greater than 20, wherein the catalyst is prepared in the absence of boron. The catalyst further comprises a noble metal hydrogenation component. The feed may be hydrocracked prior to dewaxing with the large pore zeolite. The feed may be solvent dewaxed prior to isomerization. The effluent of the isomerization step may also be further dewaxed by either solvent or catalytic means in order to achieve target pour point.

REFERENCES:
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patent: 4983274 (1991-01-01), Chen et al.
patent: 5275719 (1994-01-01), Baker et al.
patent: 5282958 (1994-02-01), Satilli et al.
patent: 5302279 (1994-04-01), Degnan et al.
patent: 5362378 (1994-11-01), Boghard et al.

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