Closed-loop vacuum fractionation process

Details Closed-loop vacuum fractionation process Closed-loop vacuum fractionation process

1978-10-10

1979-11-20

Levine, Herbert

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

203 87, 203 92, 203 94, 203 96, 203 97, 208356, 208357, B01D 310, C10G 700, C10G 2128

Patent

active

041750349

ABSTRACT:
A fractionation process wherein a fractionation column is maintained at a subatmospheric pressure through the use of a steam-jet ejector. Water drawn off the overhead receiver of the fractionation column is vaporized by indirect heat exchange to form the moderate pressure steam charged to the ejector. The effluent of the ejector is passed through a condenser, and the resultant condensate is recycled to the overhead receiver by admixture with the overhead vapor stream of the fractionation column. The disposal of hydrocarbon-contaminated aqueous overhead liquid is thereby minimized.

REFERENCES:
patent: 2224925 (1940-12-01), Potts et al.
patent: 2462013 (1949-02-01), Waterman
patent: 3413217 (1968-11-01), Kunesh
patent: 3471371 (1969-10-01), Nagy et al.
patent: 4083772 (1978-04-01), Asselin et al.

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