FIELD: crude oil treatment.
SUBSTANCE: invention relates to freeing crude oil, gas condensates, and fractions thereof from hydrogen sulfide using neutralization reagents. Cruse oil is purified by treating starting material with 10-45% aqueous solution of alkali metal pyrosulfite or hydrosulfite, or nitrite, or ammonium hydrosulfite taken on the basis of at least 1 mole pyrosulfite or 2 mole hydrosulfite, o5 1 mole nitrite per 1 mole hydrogen sulfide. Process is conducted in presence of alkaline caprolactam production effluent taken in amounts 3 to 15 g per 1 g hydrogen sulfide at 10 to 80°C.
EFFECT: enhanced process efficiency and extended application area for alkaline caprolactam production effluent.
5 cl, 9 ex
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