Process for the manufacture of lubricating oils

Details Process for the manufacture of lubricating oils Process for the manufacture of lubricating oils

1984-12-24

1987-01-13

Hearn, Brian E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208 89, C10G 6704

Patent

active

046362991

ABSTRACT:
The present invention provides for a process for reducing the pour point of a hydrocarbon feedstock containing nitrogen- and sulfur-containing compounds. Specifically, the hydrocarbon feedstock is passed to an extraction zone wherein N-Methyl-2-pyrrolidone is used to extract a portion of the aromatic compounds. A portion of the extraction zone raffinate is then passed to a hydrotreating zone wherein a portion of the nitrogen and sulfur containing compounds are converted to hydrogen sulfide and ammonia. Subsequently, a portion of the hydrotreating zone effluent is then passed to a dewaxing zone and contacted with a shape selective molecular sieve containing dewaxing catalyst.

REFERENCES:
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patent: 3617475 (1971-11-01), Offutt
patent: 3652448 (1972-03-01), Cummins
patent: 3682813 (1972-08-01), Dun et al.
patent: 3755138 (1973-08-01), Chen et al.
patent: 3880747 (1975-04-01), Mills et al.
patent: 3929616 (1975-12-01), Mead et al.
patent: 4124489 (1978-11-01), Reid
patent: 4213847 (1980-07-01), Chen et al.
patent: 4272362 (1981-06-01), Schneider et al.
patent: 4515680 (1985-05-01), Hettinger et al.

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