FIELD: process engineering.
SUBSTANCE: invention relates to surface modification of polymer membrane materials. Surface of polymer membrane materials is, first, treated by gaseous fluorine-bearing mix and, then, by that of gaseous nitrogen oxides NO and/or NO2 and inert dilutant. Thereafter, said surface is treated by water solution of ammonia.
EFFECT: fast removal of anhydrous hydrogen fluoride, integral surface, absence of mechanical damages on surface, selectivity of gas separation.
2 cl, 2 dwg
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