Chevron U.s.a. Inc.

Subhasis Bhattacharya

Ujjal Mukherjee

Marvin I Greene

Guan-Dao Lei

Axel Brait

Ujjal K Mukherjee

The present invention is directed to a refining process for producing heavy lubricating base oils (LBO) from a blended hydrocarbonaceous feedstock containing a heavy coker gas oil, a visbroken gas oil, heavy cycle oil, oils from residue hydrocracking, aromatic extract or any other feedstock normally not conducive to lube oil basestock production, using a two-stage hydrocracking process.

Two-stage hydrocracking process for making heavy lubricating base oil from a heavy coker gas oil blended feedstock

The present invention is directed to a refining process for producing hydroprocessed distillates and a heavy vacuum gas oil (HVGO). The process produces middle distillates that have reduced nitrogen and sulfur content, while simultaneously producing a 900&#xb0; F.(482&#xb0; C.) HVGO stream useful as a fluidized catalytic cracking (FCC) unit feedstock.

Method for making middle distillates and a heavy vacuum gas oil FCC feedstock

A process for heavy base oil production, comprising: a. performing an aromatic extraction of a first hydrocarbon feed to produce an aromatic extract, and a waxy raffinate; b. mixing the aromatic extract with a second hydrocarbon feed to make a mixed feed having greater than 2,000 wt ppm sulfur; c. feeding the mixed feed to a hydroprocessing unit to produce a heavy API Group II base oil having a kinematic viscosity at 70&#xb0; C. from 22.6 to 100 mm/s. An integrated refinery process unit for making heavy base oils, comprising: a. an aromatic extraction unit fluidly connected to a solvent dewaxing unit and a hydroprocessing unit; b. a first line from the aromatic extraction unit, that feeds an aromatic extract to a second hydrocarbon feed to make a mixed feed having greater than 2,000 wt ppm sulfur; and c. a connection that feeds the mixed feed to the hydroprocessing unit.

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Walnut Creek, CA, United States of America

Subhasis Bhattacharya