Control method for solvent refining lubricating oils

Details Control method for solvent refining lubricating oils Control method for solvent refining lubricating oils

1991-04-01

1992-12-15

Morris, Theodore

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208323, 208339, C10G 5306

Patent

active

051714264

ABSTRACT:
In a solvent refining process a lubricating oil stock is solvent extracted to yield a primary aromatics-lean raffinate and a primary aromatics-rich extract. Aromatics content of primary raffinate is controlled by manipulating extraction temperature and solvent dosage. Primary extract is separated (settled) to form a secondary raffinate and a secondary extract. The aromatics content of secondary extract is controlled by manipulating settling temperature.

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patent: 4053744 (1977-10-01), Woodle
patent: 4311583 (1982-01-01), Woodle
patent: 4328092 (1982-05-01), Sequeira, Jr.
patent: 4419226 (1983-12-01), Asselin
patent: 4866632 (1989-09-01), Mead et al.
patent: 5039399 (1991-08-01), Sequeira, Jr.

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