| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite separation membrane which has improved permeation flux of a medium of liquid while suppressing the deterioration of rejection of a dissolution object contained in separation object liquid, in the composite separation membrane provided with a porous support and a separation function layer formed on the porous support.SOLUTION: A composite separation membrane includes a porous support and a separation function layer formed on the porous support. Therein, the separation function layer comprises a polyfunctional amine having an aromatic ring, an aliphatic polyfunctional amine besides the polyfunctional amine, and a polyamide formed by reaction of a compound group containing polyfunctional acid halide and the proportion of a unit originated from the polyfunctional amine having the aromatic ring, occupied by a polyfunctional amine unit of the polyamide is 30 mol% or less. |
