PROCESSING TECHNIQUE FOR HYDROCARBON GAS CONTAINING HYDROGEN SULFIDE Russian patent published in 1995 - IPC

FIELD: separation and processing of gas. SUBSTANCE: technique includes: separation, compression, processing by liquid absorbent to get a gaseous fraction and acid fractions; absorption separation, drying of gaseous fraction with separation from it of hydrogen carbon fractions to be delivered to the customer; processing of acid fractions to obtain elementary sulfur. For decreasing or avoiding hazardous exhausts, after compression, gas is passed through a selective membrane at a temperature which should be lower than the dew point of the gas to be cleaned; the pressure ratio of pressure above and under the membrane should be 2 - 200. The membrane's hydrogen sulfide selectivity rate should be 5-100. Polysulfone and cellulose acetate membranes are used. EFFECT: higher efficiency and reliability. 5 cl, 1 dwg, 1 tbl