FIELD: crude oil treatment.
SUBSTANCE: invention relates to removal of hydrogen sulfide and mercaptans from petroleum and gas condensate. Process is conducted through oxidation of impurities with air oxygen dissolved in petroleum under pressure up to 2.5 MPa at 20 to 70°C in presence of solution of ammonium salts of cobalt sulfophthalocyanines in 20-30% aqueous ammonia solution. Reagents are used in following amounts calculated per 1 mole hydrogen sulfide: 0.1-1.6 mole NH4OH, 0.05-0.1 g phthalocyanine catalyst, and 0.05-0.1 m3 air. More specifically, ammonium salts of cobalt sulfo-, disulfo-, tetrasulfo-, dichlorodisulfo-, and dichlorodioxydisulfophthalocyanine are used. Part of exhausted ammonia catalyst solution is separated from cleaned raw material and returned into process.
EFFECT: minimized consumption of reagents and power, and enabled carrying out the process directly under oil-field conditions.
10 cl, 1 dwg, 2 tbl, 3 ex
