Process for recovering organic solvents and contaminants from so

Details Process for recovering organic solvents and contaminants from so Process for recovering organic solvents and contaminants from so

1991-08-30

1993-09-14

Drodge, Joseph W.

Liquid purification or separation

Processes

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

134 10, 134 26, 134 40, 210639, 210774, 210787, 210804, B01D 1104

Patent

active

052445755

ABSTRACT:
A method for recovering contaminants and the organic solvents used to extract the contaminants from an aqueous solution containing soap liquors comprises extracting the aqueous solution with an organic solvent having a density sufficient to extract the contaminants and to subsequently separate the organic solvent from the aqueous solution containing the soap liquors. The method further comprises shaking the aqueous solution for providing intimate contact between the organic solvent and the aqueous solution, adding an inorganic salt after shaking the aqueous solution for separating the aqueous solution into a plurality of layers, reextracting at least one layer with an organic solvent for producing a second plurality of layers, and separating a layer substantially including the organic solvent and the contaminants for recovering the organic solvent and the contaminants from the aqueous solution containing the soap liquors.

REFERENCES:
patent: 1955065 (1934-04-01), Hawley
patent: 2919246 (1959-12-01), De Boer et al.
patent: 4698148 (1987-10-01), Keane
patent: 4906302 (1990-03-01), Bruya
patent: 4975198 (1990-12-01), Steiner
patent: 5055196 (1991-10-01), Darian et al.
EPA Laboratory Manual SW-846: Test Methods for Evaluating Solid Waste, vol. 1B, Revision 1, Nov. 1990, pp. 3510A-1 to 3510A-8 and 3520A-1 to 3520A-8.
"EPA Method 505 Automated via Zymate Laboratory Automation System," Environmental Lab Automation Notes, Fall 1990/vol. 1, No. 1, pp. 1 and 7.

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