FIELD: technological processes.
SUBSTANCE: invention is related to membrane gas separation. Method for fractionation of low-molecular hydrocarbons mixtures characterised by the fact that crude mixture separation into permeate and retentate is performed on a microporous membrane with homogeneous porosity with pore diameter in the range of 5-250 nm, at that, temperature of the membrane and permeate as well as permeate side pressure is kept below temperature and pressure of the used crude mixture with provision of capillary condensation of mixture components in micropores membrane.
EFFECT: higher efficiency and process selectivity of fractionation of low molecular hydrocarbons by selective capillary condensation of gases in micropores membranes with low membrane cooling.
8 cl, 1 tbl, 3 dwg
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