| abstract |
on prépare une dispersion fluide comprenant une charge, un solvant soluble dans l'eau, une résine insoluble dans l'eau mais soluble dans le solvant organique et donnant après cokéfaction un taux de coke supérieur à 20 % en poids on la dépose sur ledit support minéral on déplace tout ou partie dudit solvant pour précipiter la résine on cokéfie la résine et éventuellement le support. A method of manufacturing a mineral membrane on a mineral support comprising the manufacture of a dispersion comprising a filler and a resin, the deposition of this dispersion on the support so as to form a layer, the heat treatment of the support coated with said layer , characterized in that, so as to obtain an asymmetrical membrane of small thickness, a fluid dispersion is prepared comprising a filler, a water-soluble solvent, a resin insoluble in water but soluble in the organic solvent and giving after coking a coke content greater than 20% by weight it is deposited on said mineral support all or part of said solvent is displaced to precipitate the resin the resin and possibly the support are coked. |