Solvent refining of residues

Details Solvent refining of residues Solvent refining of residues

1985-07-15

1989-01-03

Sneed, H. M. S.

Mineral oils: processes and products

Fractionation

Deasphalting

208 45, 208188, 208317, 208320, 208321, 196 1452, C10C 300

Patent

active

047955511

ABSTRACT:
In the solvent refining of a residual oil, a mixture of refined oil and refining solvent, and a mixture of pitch impurities and refining solvent are introduced into separate zones of a combination tower operated at a pressure of no greater than 100 psig to recover refining solvent from each of the mixtures. The combination tower is preferably A modified crude distillation tower from a preexisting crude unit, whereby idle crude units may be converted to solvent refining.

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