FIELD: oil industry.
SUBSTANCE: invention can be used in oil producing industry in preparation of oil containing hydrogen sulphide. Proposed method comprises multistage separation and further stripping of hydrocarbon gas not containing hydrogen sulphide. Additionally in zone of desorption column, located between points of adding oil and gas containing hydrogen sulphide not containing hydrogen sulphide, sulphurous gas is fed in amount of 0.5-12 m3/t with molar fraction of hydrogen sulphide not more than 1.6 %.
EFFECT: technical result is improved quality of commercial oil due to elimination of possible formation of thermally unstable sulphur-containing compounds in oil as a result of increase of efficiency of removing hydrogen sulphide from oil by blowing in desorption column, degree of cleaning due to reduced consumption of sulphide-containing gas supplied to it, reduced consumption of desorbing gas and costs for cleaning oil from hydrogen sulphide.
1 cl, 1 tbl, 1 dwg
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