Cross-flow filtration process for separating organic...

B - Operations – Transporting – 01 – D

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B01D 61/14 (2006.01) B01D 61/16 (2006.01) C07C 227/40 (2006.01) C07K 1/36 (2006.01)

Patent

CA 2204307

Process for separating and/or isolating organic compounds which are soluble in water, some of which are adsorbed on finely divided inorganic solids, by adsorption of this fraction and isolation of the loaded solid, which is characterised in that a) the solutions containing the organic compounds are placed in contact with a suitable solid, then cross-flow filtration is performed by b) allowing the suspensions produced to flow alongside a porous surface/membrane, wherein c) a pressure difference is set up between the side being flowed over and the opposite side of the surface/membrane, d) so that a fraction of the solution from which adsorbable compounds (a) have been partly or completely removed and is flowing over the surface/membrane passes through the surface/membrane in a transverse direction with respect to the direction of flow (filtrate flow), e) the non-adsorbed organic compounds (b) are isolated from this fraction, f) the fraction of solution or suspension which does not pass through the surface/membrane, optionally after isolation of some or of the entire amount of the solid, is returned to circulation to adsorb residual amounts of organic compounds which are optionally still present (point a).

Méthode pour séparer et (ou) isoler des composés organiques hydrosolubles, dont certains sont adsorbés sur des particules solides minérales finement divisées, par adsorption de cette fraction et isolation des solides chargés; la méthode consiste à a) mettre en contact les solutions renfermant les composés organiques avec un solide approprié, puis à filtrer à contre-courant en b) laissant la suspension produite s'écouler le long d'une surface/membrane poreuse, où c) une différence de pression est maintenue entre le côté sur lequel s'effectue l'écoulement et le côté opposé de la surface/membrane, d) de telle façon qu'une fraction de la solution de laquelle les composés adsorbables (a) ont été partiellement ou totalement séparés, et qui s'écoule au-dessus de la surface/membrane, passe à travers cette surface/membrane selon une direction perpendiculaire à la direction de l'écoulement (écoulement du filtrat), e) les composés organiques non adsorbés (b) sont isolés de cette fraction, f) la fraction de solution ou de suspension qui ne passe pas à travers la surface/membrane, facultativement après isolation partielle ou totale du solide, est renvoyée dans la circulation pour adsorber les quantités résiduelles de composés organiques qui sont encore facultativement présentes (point a).

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