Process for treating waste water containing chlorinated organic

Details Process for treating waste water containing chlorinated organic Process for treating waste water containing chlorinated organic

1993-09-02

1995-02-28

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210762, 210766, 210908, 210909, C02F 102, C02F 158

Patent

active

053934288

ABSTRACT:
A process for treating waste water containing chlorinated organic substances, particularly waste water from production of epichlorohydrin which contains more than 10 mg of adsorbable organic halogen compounds (AOX) per liter, comprising charging the waste water at a pH of 10 to 14 (measured at room temperature) into a reactor and maintaining a temperature of at least 75.degree.C., a pressure of at least 1 bar (abs.), and a residence time of at least 0.5 hours in said reactor, thereby partially dechlorinating and/or dehydrochlorinating chlorinated organic compounds contained in the waste water, and thereafter subjecting the waste water to further dechlorination and/or dehydrochlorination treatment in the presence of a hydrogen-containing gas, a hydrogen-releasing compound and/or a catalytically active material; and optionally subjecting the waste water to a biological treatment with the use of microorganisms; and apparatus for carrying out the foregoing process.

REFERENCES:
patent: 3988259 (1976-10-01), Ray
patent: 4246104 (1981-01-01), Schmidt et al.
patent: 4604215 (1986-08-01), McCorguodale
patent: 4869833 (1989-09-01), Binning et al.
patent: 5108647 (1992-04-01), Bolsing
Roempps Chemie-Lexikon, pp. 2485-2486.

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