FIELD: oxidizing cleaning of oil, gas-condensate and petroleum products, as well as water-and-oil emulsions from hydrogen sulfide; oil gas, oil- refining and other industries. SUBSTANCE: method consists in oxidizing air with oxygen at temperature of from 20 to 70 C and pressure of from 0.3 to 3.5 MPa in presence of nitrogen- containing basic or alkaline reagent in the amount of no less than 0.2 mole per mole of hydrogen sulfide and water-soluble salt of metal of varying valency or its complex with pyrophosphate or ammonia used as catalyst. Salt or complex of metal is used as aqueous or water-and-alkaline solution containing 0.1-2 g of ions per ton of raw material. Used as salt of varying valency metal is sulfate, chloride or nitrate of bivalent nickel, manganese, cobalt, copper or ferric iron; used as complex of metal is complex of bivalent cobalt, copper, nickel with pyrophosphate of alkali metal or with ammonia. For cleaning raw containing hydrogen sulfide and mercaptans, use is made of amino compounds, mainly tertiary and/or secondary alkylamine, alkanolamine as nitrogen-containing basic reagents. EFFECT: extended range of moderate and low-cost catalysts for oxidizing cleaning process; facilitated procedure; increased degree of demercaptonization of hydrogen sulfide and mercaptan-containing raw material, up to 40-60% at retained high degree of cleaning, 100% from hydrogen sulfide. 9 cl
