METHOD OF INCREASING CHEMICAL AND MECHANICAL STABILITY OF GAS FILLING POLYMERIC FIBER MEMBRANE Russian patent published in 2017 - IPC B01D69/08 B01D71/64 B01D71/68 B01D63/02 B01D67/00 

FIELD: chemistry.

SUBSTANCE: method involves forming a polymeric hollow fiber membrane followed by a thermovacuum treatment. The hollow fiber membrane is formed from a thermally crosslinkable polyimide, or polysulfone or polycarbonate, in which the ratio of crosslinkable and non-crosslinkable polymer chain fragments is in the range of 1:8 to 8:1. Subsequently, stepwise drying is carried out, including a catalyst in the structure of the polymeric hollow fiber membrane. Thermovacuum treatment at a temperature of 60-220°C for 1-24 hours using a catalyst. The catalyst is toluenesulfonic acid or titanium tetraisopropoxide or bis (triethanolamine) titanium diisopropoxide or methanesulfonic acid is included in the structure of the polymeric hollow fiber membrane in its stepwise drying mode.

EFFECT: increasing the membrane plasticisation pressure, which makes it possible to use it in aggressive gas environments.

2 dwg