Process for separating a resin phase from a solvent solution con

Details Process for separating a resin phase from a solvent solution con Process for separating a resin phase from a solvent solution con

1991-02-12

1992-09-08

Davis, Jr., Albert W.

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

Solvent extraction

208309, 165113, B01D 1104, C01G 2114

Patent

active

051455749

ABSTRACT:
A process for separating a resin phase from a solvent solution containing a solvent, demetallized oil and resin which process comprises: (a) passing the solvent solution over a portion of a generally vertically positioned heat-exchange surface thereby heating the solvent solution to precipitate a resin phase; (b) heating an upper portion of the vertically positioned heat-exchange surface with a circulating hot heat-exchange fluid; (c) passing at least a portion of the resin phase which is precipitated on the upper portion of the vertically positioned downwardly over a lower portion of the vertically positioned heat-exchange surface which lower portion is maintained at a lower temperature than the temperature of the upper portion; (d) recovering the solvent solution having a reduced concentration of resin; and (e) recovering a resin phase.

REFERENCES:
patent: 2213798 (1940-09-01), Anne
patent: 2650897 (1953-09-01), Woerner
patent: 4088540 (1978-05-01), Bunas

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