Аннотация:The technology of demercaptanization of light hydrocarbon fractions and liquefied hydrocarbon gases with the use of 25% water ammonia solution (ammonia water) is presented. The advantage of the method in comparison with conventional techniques, for example Merox, is lack of the stage of oxidizing catalytic regeneration of used alkali and high-toxic waste - sulfurous-alkaline waste. Regeneration of used ammonia water (saturated with sulfurous compositions) is carried out at the same plant for purification of sulfurous-ammonium waste treatment by the rectification method where ammonia water is produced.