초록 ▼

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, throug

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 contaminated water. In a preferred embodiment, the process comprises adjusting the pH of the contaminated 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 pentachlorophenol from waste water contaminated with about 250 parts per billion thereof.

대표청구항 ▼

A process for removing at least one organic material selected from the group consisting essentially of chlorinated phenols, phthalate esters, phosphate esters, phosphorothioate esters, chlorinated benzenes, chlorinated biphenyls, polynuclear aromatics, nitrobenzenes, alkyl nitrobenzenes, chloroalken

A process for removing at least one organic material selected from the group consisting essentially of chlorinated phenols, phthalate esters, phosphate esters, phosphorothioate esters, chlorinated benzenes, chlorinated biphenyls, polynuclear aromatics, nitrobenzenes, alkyl nitrobenzenes, chloroalkenes, chlorocycloalkenes and chloro-ethers from water contaminated therewith, said organic material having a normal boiling point in excess of 200°C. and a relative volatility with respect to water of at least about one; said process comprising passing a current of vapor, sufficient to vaporize at least a portion of said organic material, through a moving stream of said contaminated water; and then separating vapor containing the organic material from the water to produce water having a reduced concentration of the organic material.