Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1991-04-01
1993-09-07
Morris, Theodore
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
208322, 208323, C10G 5306
Patent
active
052425797
ABSTRACT:
In a solvent refining process a naphthenic lubricating oil feedstock is solvent extracted to yield a primary aromatics-lean raffinate and a primary aromatics-rich extract. Polynuclear aromatic 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. Secondary raffinate is recycled to solvent extraction. The refractive index of secondary raffinate is controlled by manipulating settling temperature and antisolvent dosage. The refractive index of secondary raffinate is maintained at or below the refractive index of feedstock. An improved yield of primary raffinate of a specified polynuclear aromatic content is achieved.
REFERENCES:
patent: 2261287 (1941-11-01), Read
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.
Mead Theodore C.
Sequeira, Jr. Avilino
Brunsman David M.
Morgan Richard A.
Morris Theodore
Park Jack H.
Priem Kenneth R.
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