METHOD OF EXTERNAL REGENERATION OF MIXED IONITE LAYER Russian patent published in 2014 - IPC C02F1/42 B01J49/00 C02F103/04 

FIELD: chemistry.

SUBSTANCE: invention can be used in power engineering, nuclear industry, microelectronics, pharmaceutics and other fields of industry, where highly desalted water is required. To realise the method mixture of monodisperse ionites are reloaded from working filter of mixed action into cationite-regenerating filter, pure cationite and anionite are separated from mixture, anionite is loaded out into anionite-regenerating filter and regenerated, cationite is regenerated in cationite-regenerating filter and reloaded into anionite-regenerating filter. Separation of pure cationite and anionite from mixture of ionites is carried out by method of hydraulic separation. As cationites used are particles of monodisperse cationites with size 0.5-0.7 mm, and as anionite particles of monodisperse anionites with size 0.4-0.6 mm. Intermediate layer, containing 70-90% of cationite in H⁺ - form and 10-30% of anionite in $$S{O}_4^{-2}$$ - form, is created in cationite-regenerating filter by processing cationite and calculated amount of waste anionite by passing through them sulfuric acid solution. Intermediate layer constitutes from 1 to 10% of the total volume of loaded ionites and is not loaded out from cationite-regenerating filter when cationite and anionite are.

EFFECT: method makes it possible to reduce the number of reloadings of ionites with preservation of quantity of purified water, as well as completely eliminate possibility of contaminating ionites that have been regenerated by other forms of ionites.

3 cl, 10 dwg, 1 ex