| 摘要 |
PURPOSE:To enhance separation efficiency and a permeation speed, in separating a solution mixture by a pervaporation method, by allowing the solution mixture to pass through a non-porous layer through a porous layer. CONSTITUTION:A porous layer comprises a layer having substantially no separation capacity and a pore size of about 100-several mum and is prepared by using polysulfone, cellulose acetate, cellulose nitrate, a homopolymer or copolymer of vinyl chloride or a blend thereof. A non-porous layer comprises a layer having no piercing pore observable by an electronic microscope and has a thickness of 100-10,000Angstrom and is prepared by using polyurea, polyetheramide, polyether urea, polyamide, polyether, a homopolymer or block or graft copolymer of polyvinyl halide or a blend thereof. |
