COMPOSITE MEMBRANE FOR DRYING GAS MIXTURES BASED ON A MICROPOROUS POLYMER IN POROUS MATRIX Russian patent published in 2020 - IPC B01D69/10 B01D69/14 B01D53/22 B01D53/26 B82Y40/00 

FIELD: physics.

SUBSTANCE: invention relates to membrane technologies and can be used for selective extraction of water vapour during drying of gas mixtures. Described is a composite membrane for drying gas mixtures, comprising a microporous polymer enclosed in pores of a rigid porous matrix. Pore diameter of the porous matrix is 5–250 nm. Said polymer has polar functional groups and has the Kuhn statistical segment length of not less than 10 % of porous matrix pore diameter. Polar functional groups of said polymer are chemically bonded with surface groups of matrix pore walls.

EFFECT: invention improves gas transport properties of the composite membrane with increasing selectivity of extraction of water vapour from gas mixtures and a factor of their separation due to reduced permeability of polymer macromolecules in a rigid matrix.

6 cl, 3 dwg, 1 tbl, 8 ex