COMPOSITE MEMBRANE ON BASIS OF HIGHLY POROUS VITREOUS POLYMERS Russian patent published in 2013 - IPC B01D69/02 B01D71/06 

FIELD: process engineering.

SUBSTANCE: invention relates to composite membranes to be used in gas-fluid contactors wherein gas absorption and/or desorption processes proceed, particularly, to composite membrane based of highly porous vitreous polymers. Said membrane consists of at least three layers: Porous substrate wit pore mean diameter of 0.15-0.45 mcm in contact with mid layer of vitreous polymer with vitrification temperature of 140-440°C and CO₂ permeability of 3000 Barrer eliminating substrate defects and acting as adhesive layer for application of the next and the selective layers in contact with mid layer made of vitreous polymer with the same vitrification temperature and CO₂ permeability of 6000 Barrer.

EFFECT: higher efficiency of the membrane, chemical stability of its substrate.

14 cl, 1 dwg, 14 tbl, 10 ex