Crosslinked composite semipermeable membrane

Details Crosslinked composite semipermeable membrane Crosslinked composite semipermeable membrane

1980-04-01

1982-06-29

Therkorn, Ernest G.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

2105002, 210506, B01D 3916

Patent

active

043371540

ABSTRACT:
A composite semipermeable membrane comprising a porous support and a crosslinked thin film formed on said porous support, said crosslinked thin film being formed by reacting compound (A) which is at least one compound selected from the group consisting of polyalkylenimines and polyalkylenimine derivatives, compound (B) which is at least one compound selected from a group of compounds typified by piperazine, 2,5-dimethylpiperazine, 4-aminomethylpiperidine and 1,4,8,11-tetraazacyclotetradecane, and compound (C) as a crosslinking agent which is a compound having in one molecule two or more functional groups capable of reacting with amino groups; and a process for preparing said composite semipermeable membrane.

REFERENCES:
patent: 3687842 (1972-08-01), Credali et al.
patent: 3696031 (1972-10-01), Credali et al.
patent: 3744642 (1973-07-01), Scala et al.
patent: 3951815 (1976-04-01), Wrasidlo
patent: 4039440 (1977-08-01), Cadotte
patent: 4082659 (1978-04-01), Heinze et al.
"Continued Eval. of In Situ-Formed Condensation Polymers for R.O. Membranes" Midwest Research Institute, Apr. 1976, NTIS-PB-253, 193, pp. 16-20, 31.
Cadotte J. E., et al., "In-Situ-Formed Condensation Polymers for Reverse Osmosis Membranes" Office of Saline Water, 1972, NTIS-PB-229, 337, p. 1.
Fans H. H. P., et al., "Removal of Alcohols, Amines, and Anphatic Acids in Aqueous Solution by NS-100 Membranes" Jour. App. Pol. Sc., vol. 19, pp. 1347-1358 (1975).

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