METHOD FOR PURIFICATION OF DIMETHYLAMIDE-CONTAINING PROCESS WATER Russian patent published in 2009 - IPC C02F9/02 C02F1/44 C02F1/28 B01J20/34 

FIELD: chemistry.

SUBSTANCE: invention can be used for purification of dimethylamide-containing process water and for recycling of valuable components used in synthetic fibers production. For method implementation the initial waste water is beforehand divided by baromembrane separation to purified water (permeate) and concentrate. The purified water is returned to production line and the concentrate is filtered through active charcoal with following active charcoal regeneration by the flow of desorbent (hot nitrogen with temperature 150-200°C) and separation of concentrated dimethylamide.

EFFECT: pure water recycling, economical efficiency enhancing of the process of dimethylamide sorption with active charcoal including its following extraction by desorbent flow.

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