초록 ▼

A method for designing and making composite membranes having a microporous support membrane coated with a permselective layer. The method involves calculating the minimum thickness of the permselective layer such that the selectivity of the composite membrane is close to the intrinsic selectivity of

A method for designing and making composite membranes having a microporous support membrane coated with a permselective layer. The method involves calculating the minimum thickness of the permselective layer such that the selectivity of the composite membrane is close to the intrinsic selectivity of the permselective layer. The invention also provides high performance membranes with optimized properties.

대표청구항 ▼

A process for separating a first component, A, from a second component B, of a fluid mixture, comprising: providing a membrane having a feed side and a permeate side, said membrane comprising a composite of a microporous support layer having a thickness l1 coated with a permselective layer, the perm

A process for separating a first component, A, from a second component B, of a fluid mixture, comprising: providing a membrane having a feed side and a permeate side, said membrane comprising a composite of a microporous support layer having a thickness l1 coated with a permselective layer, the permselective layer characterized in that it has an intrinsic selectivity a10, and a thickness l2 given by: [Figure] where P1(A) and P1(B) are the permeabilities of the support layer to components A and B respectively, and where K is a constant having a value between 0.7 and 1; contacting said feed side with a fluid mixture comprising components A and B; withdrawing from said permeate side a permeate stream enriched in component A compared with said fluid mixture; withdrawing from said feed side a residue stream depleted in component A compared with said fluid mixture.