Composite reverse osmosis membrane having active layer of aromat

Details Composite reverse osmosis membrane having active layer of aromat Composite reverse osmosis membrane having active layer of aromat

1995-12-08

1997-01-14

Fortuna, Ana

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050027, 21050038, 21050041, 21050037, B01D 2900

Patent

active

055935885

ABSTRACT:
A composite reverse osmosis membrane may advantageously be prepared by the process comprising applying porous support layer onto a nonwoven fabric and then forming an ultrathin active layer of an aromatic polyester superposed thereon, the active layer being prepared by the interfacial polymerization of an aqueous solution of polyhydric phenol and a solution of aromatic acyl halide dissolved in an organic solvent; or applying a porous support layer onto a nonwoven fabric and then forming an ultrathin active layer of a copolymer of aromatic polyester and aromatic polyamide superposed thereon, the active layer being prepared by the interfacial polymerization of a mixed aqueous solution of polyhydric phenol and an aromatic amine with a solution of aromatic acyl halide dissolved in an organic solvent. The composite membrane of the present invention has improvements in properties, such as water-permeability, chlorine-resistance, oxidation stability, salt rejection rate, and durability.

REFERENCES:
patent: 3153008 (1964-10-01), Fox
patent: 3567632 (1971-03-01), Richter et al.
patent: 3744642 (1973-07-01), Scala et al.
patent: 3878109 (1975-04-01), Ikeda et al.
patent: 3904519 (1975-09-01), McKinney, Jr. et al.
patent: 3926798 (1975-12-01), Cadotte
patent: 3951815 (1976-04-01), Wrasidlo
patent: 4005012 (1977-01-01), Wrasidlo
patent: 4039440 (1977-08-01), Cadotte
patent: 4277344 (1981-07-01), Cadotte
patent: 4360659 (1982-11-01), Sikdar
patent: 4366062 (1982-12-01), Kurihara et al.
patent: 4557949 (1985-12-01), Kurihara et al.
patent: 4559139 (1985-12-01), Uemura et al.
patent: 4606943 (1986-08-01), Rak et al.
patent: 4626468 (1986-12-01), Sundet
patent: 4643829 (1987-02-01), Sundet
patent: 4783346 (1988-11-01), Sundet
patent: 4913816 (1990-04-01), Waite
patent: 5051178 (1991-09-01), Uemura et al.
patent: 5356461 (1994-10-01), Sluma et al.

Affiliated with

Also associated with

Rating

Composite reverse osmosis membrane having active layer of aromat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Composite reverse osmosis membrane having active layer of aromat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite reverse osmosis membrane having active layer of aromat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1385611