Two-stage subcritical-supercritical wet oxidation

Details Two-stage subcritical-supercritical wet oxidation Two-stage subcritical-supercritical wet oxidation

1993-02-11

1993-08-31

Wyse, Thomas

Liquid purification or separation

Processes

Chemical treatment

210761, C02F 1108, C02F 174

Patent

active

052406199

ABSTRACT:
A two-stage wet oxidation process for COD removal from high strength wastewater is disclosed. The wastewater stream is treated in a first stage subcritical wet oxidation zone at temperatures between about 250.degree. and 374.degree. C. to remove a substantial portion of the COD. Subsequently, all or a portion of the first stage oxidized waste stream is treated in a second stage supercritical wet oxidation zone at temperatures of 374.degree. to about 600.degree. C. to remove any remaining COD content. Both stages of wet oxidation treatment are carried out at essentially the same system pressure.

REFERENCES:
patent: 3849536 (1974-11-01), Morgan
patent: 3917460 (1975-11-01), Morgan
patent: 4141829 (1979-02-01), Thiel et al.
patent: 4347144 (1982-08-01), Bodenbenner
patent: 4525283 (1985-06-01), Horak et al.
patent: 4604957 (1986-08-01), Cederquist
patent: 5057220 (1991-10-01), Harada et al.
patent: 5106513 (1992-04-01), Hong
patent: 5183577 (1993-02-01), Lehmann

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