METHOD OF LIGHT HYDROCARBONS TREATMENT FROM CARBONYL SULPHIDE Russian patent published in 2015 - IPC C10G19/02 C10G19/08 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the sphere of hydrocarbons treatment from sulphur compounds and may be used in oil, gas and petrochemical industries. The invention is related to the method of light hydrocarbons treatment from carbonyl sulphide by its decomposition in hydrocarbon by an alkaline agent with further stripping of the alkaline agent saturated with sulphur compounds and its oxidising recovery by treatment of air oxygen in presence of the catalyst oxidising sulphur compounds. The promoter containing alkali water (NaOH, KOH) and water-soluble polar organic compounds formed during treatment of products of alkalis and acid impurities of hydrocarbon fractions interaction in presence of the polymer-based catalyst is used as the alkaline agent. Oxidising recovery of the alkaline agent saturated with sulphur content is made by air oxygen at temperature of 30-80°C and pressure of 3.0 MPa in presence of polymer-based catalysts, at that the above alkaline agent (promoter) has total alkalinity not less than 5 wt % and content of water-soluble polar compounds and acid impurities in it is not less than 1.7 wt %.

EFFECT: increasing purification degree of liquefied hydrocarbon gases, in particular propane-propylene fraction from carbonyl sulphide (COS).

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