COMPOSITION ION-EXCHANGE CHAMBER Russian patent published in 2009 - IPC B01D71/00 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of ion-exchange membranes, possessing property of non-equivalence of ion transport in two different directions, and can be used for water purification devices, concentration, separation of ions, as well as for average-temperature fuel elements. Composition ion-exchange membrane, characterised by different diffusion permeability with respect to opposite sides of membrane surface, consists of perfluorinated sulphocationite ion-exchange matrix, modified with gradiently distributed in membrane thickness dopant nanoparticles, as such, either fine-dispersed hydrated acid zirconium phosphate Zr(HPO₄)₂·H₂O, or fine-disperse hydrated zirconium oxide ZrO₂·H₂O, or fine-disperse hydrated silicon oxide SiO₂·H₂O, or fine-dispersed polyanylin, gradient distribution of inorganic dopant being obtained by its synthesis directly in polymer matrix, into which one of components of synthesised dopant is introduced, and one of polymer matrix surfaces being processed with the other component.

EFFECT: invention ensures possibility to use membranes for intensification of processes of purification, separation of various types of solutions and spontaneous concentration of solutions without applying electric potential.

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