Caustic sulfide wet oxidation process

Details Caustic sulfide wet oxidation process Caustic sulfide wet oxidation process

1991-05-13

1992-01-21

Wyse, Thomas

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210761, 210928, C02F 172, C02F 1108

Patent

active

050825712

ABSTRACT:
A process for treatment of caustic sulfide liquor by wet oxidation in a nickel-based alloy system is described. The liquor is first analyzed for alkalinity consuming species and for nonsulfidic alkalinity. If excess alkalinity consuming species is present compared to nonsulfidic alkalinity, then additional nonsulfidic alkalinity is added to the raw liquor such that excess alkalinity is present during wet oxidation treatment, thus preventing excessive corrosion to the nickel-base alloy system.

REFERENCES:
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patent: 3761409 (1973-09-01), McCoy et al.
patent: 4155848 (1979-05-01), Sato et al.
patent: 4350599 (1982-09-01), Chowdhury
patent: 4399111 (1983-08-01), Baur et al.
patent: 4756837 (1988-07-01), Nadezhdin
McCoy, J. W.; "Chemical Analysis of Industrial Water", Chemical Publishing Co., New York, 1969, pp. 125-153.
"Manual on Disposal of Refinery Wastes, Volume on Liquid Wastes"; Chapter 11--Oxidation; American Petroleum Institute, 1969.

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