Method for producing feedstocks of high quality lube base oil fr

Details Method for producing feedstocks of high quality lube base oil fr Method for producing feedstocks of high quality lube base oil fr

1994-05-13

1996-12-03

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208 95, 208111, C10G 6910

Patent

active

055804420

ABSTRACT:
A process is disclosed for producing feedstocks for manufacturing high quality lube base oil utilizing unconverted oil, which is produced from a fuels hydrocracker unit. The first step of the process is the distillation of an atmospheric residue under vacuum in a first vacuum distillation unit to produce a vacuum gas oil. The vacuum gas oil is then hydrotreated in a first reaction unit to remove impurities and produce a treated vacuum gas oil. The treated vacuum gas oil is then subjected to hydrocracking in a second reaction unit to yield light hydrocarbons. The light hydrocarbons are then subjected to a series of fractional distillations to separate light oil products and an unconverted oil. All or a fraction of the unconverted oil is fed to a second vacuum distillation unit to produce feedstocks of high quality lube base oil and a remaining portion. The remaining portion and, optionally, a fraction of the unconverted oil is recycled from the second vacuum distillation unit to the second reaction unit.

REFERENCES:
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patent: 3644197 (1972-02-01), Kelley
patent: 3788974 (1974-01-01), Buchmann et al.
patent: 4789457 (1988-12-01), Fischer et al.
patent: 4902405 (1990-02-01), MacLean et al.
patent: 4983273 (1991-01-01), Kennedy et al.
patent: 5139644 (1992-08-01), Gruia

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