POLYIMIDE GAS SEPARATION MEMBRANES Russian patent published in 2015 - IPC B01D71/64 B01D61/02 C08G73/10 

FIELD: chemistry.

SUBSTANCE: invention discloses a novel type of polyimide membranes with high permeability and high selectivity with respect to the separation of gases, namely, with respect to versions of separation CO₂/CH₄ and H₂/CH₄. With respect to CO₂/CH₄ separation polyimide membranes have passing ability by CO₂, equal 50 Barrere or higher, and the selectivity of CO₂/CH₄ monogas, equal 15 or higher, at 50°C and 791 kPa. The polyimide membranes contain functional groups transversely cross-linked under an impact of UV rays and can be applied for the production of the polyimide membranes transversely cross-linked under an impact of UV rays, with passing ability by CO₂, equal 20 Barrere or higher, and the selectivity of CO₂/CH₄ monogas, equal 35 or higher, at 50°C and 791 kPa with respect to CO₂/CH₄ separation.

EFFECT: obtaining the novel type of polyimide membranes with high permeability and high selectivity with respect to the separation of gases.

10 cl, 4 tbl, 15 ex