FIELD: crude oil treatment.
SUBSTANCE: process of removing hydrogen sulfide and mercaptans from crude oil is characterized by that, after purge of oil with hydrocarbon-containing gas to remove hydrogen sulfide, the rest of hydrogen sulfide is removed by oxidation with air oxygen in presence of water-alkali and ammonia solutions of phthalocyanine catalysts under pressure up to 2.5 MPa followed by separation of exhausted air by reducing pressure to 0.15-0.30 MPa. Exhausted air containing 40-75% hydrocarbons is used at the same pressure is used as hydrocarbon-containing purge gas.
EFFECT: reduced loss of hydrocarbons with exhausted air and reduced consumption of air and reagents in oxidative purification stage.
4 cl, 1 dwg, 1 tbl
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