Process for preparing membranes for separation of substances

Details Process for preparing membranes for separation of substances Process for preparing membranes for separation of substances

1975-08-20

1977-09-06

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

20415914, 20415916, 210500M, 260 25M, 264 49, 264 83, 264 85, 264331, 264344, 264347, B29H 720

Patent

active

040468437

ABSTRACT:
A semipermeable membrane is obtained by casting a cast solution comprising a mixture of a water-insoluble high polymer and a water-soluble high polymer, a mixture of a water-insoluble high polymer and a water-soluble surfactant or a mixture of a water-insoluble high polymer, a water-soluble high polymer and a water-soluble surfactant to form a shaped article, exposing the thus formed shaped article to a plasma to crosslink the surface thereof, and then washing the exposed article with water to remove uncrosslinked water-soluble high polymer or water-soluble surfactant. The membrane can be used for such substance separation methods as reverse osmosis, ultrafiltration and the like.

REFERENCES:
patent: 3133132 (1964-05-01), Loeb et al.
patent: 3376238 (1968-04-01), Gregorian et al.
patent: 3536796 (1970-10-01), Rock
patent: 3542908 (1970-11-01), Sharples et al.
patent: 3544358 (1970-12-01), Manjikian
patent: 3576686 (1971-04-01), Schmidle et al.
patent: 3763055 (1973-10-01), White et al.
patent: 3772072 (1973-11-01), Brown et al.
patent: 3822330 (1974-07-01), Muir et al.
patent: 3864289 (1975-02-01), Rendall
patent: 3880763 (1975-04-01), Chapman et al.
Yasuda et al., "Prep. of R. O. Membrane by Plasma Polymerization of Organic Compounds," J. of Appl. Science, vol. 17, pp. 201-222, (1973).

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