公开(公告)号：JPH0278428A

公开(公告)日：1990-03-19

申请号：JP26506888

申请日：1988-10-20

Applicant: TORAY INDUSTRIES

Inventor： SASAKI SAKAO ,  FUJIMAKI HIDEO ,  UEMURA TADAHIRO

IPC: B01D69/12 ,  B01D71/56 ,  B01D71/62 ,  B01D71/82

Abstract: PURPOSE:To selectively remove a pollutant or an effective substance by coating a microporous support membrane with a very thin membrane based on piperazine polyamide and ethylenediamine polyamide polycondensed with a bifunctional acid halide. CONSTITUTION:An aq. soln. contg. 0.2-1.0wt.%, in total, of piperazine and ethylenediamine in >=1.0 molar ratio of ethylenediamine to piperazine is prepd. and a compd. represented by formula I (where each of A and A' is a benzene or naphthalene ring and X is -O- or -CH2-) is added to the soln. by 0.01-1.0wt.%. The resulting soln. is applied to a microporous support membrane, a multifunctional acid halide soln. is further applied and a cross linked polymer layer is formed as an active layer by polycondensation to produce a laminated semipermeable membrane.