| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to membrane with selective vapour permeability and to separation of vapour from gas mixture with said membrane. Membrane with selective vapour permeability, containing cross-linked hydrophilic polymer including copolymer of polyvinyl alcohol and salt of polyacrylic acid, one alkali metal compound selected from a group consisting of compounds of potassium, caesium and rubidium compounds, wherein compound of an alkali metal hydroxide, nitrate, chloride or carboxylate. Membrane with selective vapour permeability, including a porous membrane and a hydrophilic polymer layer containing a hydrophilic polymer and alkali metal compound, and a part of hydrophilic polymer layer fills a porous membrane. Invention also includes methods of separating vapour from gas mixture, involving stage of separation of vapour from gas mixture by feeding vapour into gas mixture containing vapour through membrane with selective vapour permeability in any of claims. 1-4.EFFECT: technical result is high permeability and selectivity of membrane during passage of vapour.9 cl, 13 dwg |
