Organomineral semipermeable membrane and its production process

Details Organomineral semipermeable membrane and its production process Organomineral semipermeable membrane and its production process

1988-04-13

1989-08-29

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050025, 21050026, 21050036, 21050042, 521 27, B01C 1300

Patent

active

048614807

ABSTRACT:
The invention relates to semipermeable organomineral membranes usable in reverse osmosis.
This organomineral semipermeable membrane comprises a porous inorganic material support coated with a vinylidene fluoride polymer or copolymer-based organic layer incorporating functional groups giving the membrane a permeability to water or other solvents.
The porous inorganic material support is preferably constituted by a macroporous substrate coated with a microporous layer, e.g. produced from a single or mixed metal oxide or hydroxide. The organic layer can be constituted by polyvinylidene fluoride grafted by an appropriate monomer, such as styrene incorporating functional groups giving it selective permeability, e.g. hydrophilic groups, such as sulphonic groups.

REFERENCES:
patent: 276993 (1975-01-01), Lee et al.
patent: 4067805 (1978-01-01), Chiang et al.
patent: 4137137 (1979-01-01), Machi et al.
patent: 4595707 (1986-06-01), McCreedy et al.

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