Production of high viscosity index lubricants

Details Production of high viscosity index lubricants Production of high viscosity index lubricants

1992-06-08

1994-01-04

Morris, Theodore

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 60, C10G 6902

Patent

active

052757196

ABSTRACT:
This invention relates to the production of high viscosity index lubricants from mineral oil feedstocks, e.g., petroleum waxes, by hydrocracking in a first stage, followed by a combined hydroisomerization-hydrotreating process in a second stage, wherein the temperature in the second stage is closely controlled by regulating the amount of nitrogen-containing compounds which are permitted into the second stage.

REFERENCES:
patent: 3487005 (1969-12-01), Egan et al.
patent: 3776839 (1973-12-01), Ladeur
patent: 4975177 (1990-12-01), Garwood et al.

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