C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
202/89
C02F 1/10 (2006.01) C02F 1/04 (2006.01) C02F 1/66 (2006.01) C02F 9/00 (2006.01)
Patent
CA 1140491
ABSTRACT OF THE DISCLOSURE Organic material having a normal boiling point in excess of 200°C and a relative volatility with respect to water of at least one is removed from water contaminated therewith. The process comprises passing a current of vapor, sufficient to vaporize at least a portion of the organic material, through a moving stream of the contam- inated water. In a preferred embodiment, the process comprises adjusting the pH of the contaiminated water to a level sufficient to prevent substantial dissociation of the organic material. The contaminated water is then countercurrently contacted with a sufficient vapor flow to vaporize at least a portion of the organic material. The resulting organic material-containing vapor can be recovered, and the organic material removed. Illustrative of the process is the removal by air stripping of penta- chlorophenol from waste water contaminated with about 250 parts per billion thereof. 26,692A-F
328591
Smart & Biggar
The Dow Chemical Company
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