Process for producing an ultra-thin and asymmetric mineral membr

Details Process for producing an ultra-thin and asymmetric mineral membr Process for producing an ultra-thin and asymmetric mineral membr

1991-07-17

1993-03-02

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050025, 21050026, 427246, B01D 7104

Patent

active

051906546

ABSTRACT:
Disclosed is a process for producing a mineral membrane on a mineral support, involving the production of a dispersion of a filler and a resin, depositing this dispersion onto a support so as to form a layer, followed by the thermal treatment of the support covered with the layer, to obtain an asymmetric thin membrane. A fluid dispersion is prepared of a filler, a water-soluble solvent and a resin insoluble in water but soluble in the organic solvent, and, after coking, to a coke content higher than 20% by weight, it is deposited onto the mineral support, all or some of the solvent is displaced in order to precipitate the resin, and the resin and, if appropriate, the support are coked.

REFERENCES:
patent: 4175153 (1979-11-01), Dobo et al.

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