Pentachlorophenol recovery with methylene chloride

Details Pentachlorophenol recovery with methylene chloride Pentachlorophenol recovery with methylene chloride

1974-06-14

1976-01-06

Yudkoff, Norman

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

203 10, 203 39, 203 67, B01D 300, B01D 1100

Patent

active

039310019

ABSTRACT:
A method for removing antimicrobials such as pentachlorophenol from waste water by liquid-liquid extraction with a water immiscible organic liquid in a packed column; recovering the antimicrobial from the organic phase by distillation if desired; and, treating of the aqueous phase to remove residual antimicrobial and organic liquid. The process of the present invention recovers about 99 percent of the antimicrobial pentachlorophenol in the waste water producing a waste water containing less than 30 ppm pentachlorophenol and less than about 2 percent organic liquid, both of which may be removed by conventional carbon absorption or soil percolation to acceptable ecological levels for introduction into a stream or reuse as process water.

REFERENCES:
patent: 2761563 (1956-09-01), Waterman et al.
patent: 3365395 (1968-01-01), McDonald
patent: 3692829 (1972-09-01), Sennewald et al.

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