Method of treating a spent caustic stream from a sour water stri

Details Method of treating a spent caustic stream from a sour water stri Method of treating a spent caustic stream from a sour water stri

1991-11-21

1993-09-21

Cintins, Ivars

Liquid purification or separation

Processes

Chemical treatment

210759, C02F 176

Patent

active

052465977

ABSTRACT:
This invention relates to a method of reducing the concentration of sulfides in an aqueous system by first treating the aqueous system with hydrogen peroxide to lower the sulfide concentration to approximately 300 ppm, or less, then subsequently treating the aqueous system with chlorine dioxide to further reduce the sulfide concentration to a desirable level. The method of the invention is capable of reducing the sulfide content of the treated aqueous system to as low as tenths of a part of sulfide per million parts of sour water.

REFERENCES:
patent: 4473115 (1984-09-01), Oakes
"Controlling Sulfur Compounds", James P. Hawkins, Chem. Engng, 84(22), 61-65, (Oct. 11, 1977).

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