FIELD: oil refining and petrochemical industry.
SUBSTANCE: invention relates to oil refining and petrochemical industry and can be used to purify sulphide-alkaline wastes (SAW). Method involves oxidation of sulphide sulphur of effluents with sulphurous acid with concentration of not less than 10%. Mass amount of sulphides in the treated volume of effluents is preliminary determined, and the sulphurous acid required for their complete oxidation is determined based on providing pH 4.0–4.5 in the reaction mass. Process is carried out at temperature of 40.0–45.0 °C. As a result, colloidal sulphur is formed.
EFFECT: complete neutralization of sulphide compounds in SAW to obtain colloidal sulphur.
1 cl, 4 ex
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