Method of extracting organic contaminants from process waters

Details Method of extracting organic contaminants from process waters Method of extracting organic contaminants from process waters

1981-11-04

1985-05-21

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210909, B01D 1104

Patent

active

045185026

ABSTRACT:
In a method for removing an organic contaminant from process waters, the contaminant is extracted from the water in a countercurrent extractor by a low-boiling water-immiscible solvent. The solvent extract is sparged with an inert gas to vaporize the solvent, and the raffinate is sparged with an inert gas to vaporize any dissolved solvent therefrom. Solvent is condensed from the vapors and returned to the extractor.

REFERENCES:
patent: 3247103 (1966-04-01), Shang
patent: 3449244 (1969-06-01), Clay et al.
patent: 3527699 (1970-09-01), King
patent: 3931001 (1976-01-01), Winn
patent: 4026791 (1977-05-01), Wallace
patent: 4058526 (1977-11-01), Mertz et al.
patent: 4162902 (1979-07-01), Wiesner et al.
Coulson et al., "Chemical Engineering", vol. 2, Unit Operations, 3-1979, pp. 598-601.
Kaczmarek, "A New Simple Method for the Recovery of Trace Organics from Water", NBS Pub. 464, 11-1977.

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