METHOD OF SEWAGE WATER PURIFICATION FROM MERCURY COMPOUNDS Russian patent published in 2009 - IPC C02F1/62 C02F1/28 B01J20/26 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can be used in process of sewage water purification from mercury. In order to realise the method preparation of sorbent - Anionite "ВП-1АП" by modifying it with dichlorantin water suspension is carried out. Sewage water is alkalified, filtered, acidified and ion-exchanging sorption of mercury compounds is carried out by means of prepared sorbent Anionite "ВП-1АП" before being modified with dichloratin is preliminarily converted into chlorine-form by processing with 5% HCl solution. Water suspension with dichloratin is chosen with weight fraction of dichloratine 2%, sorbent processing with suspension being carried out for 5-6 hours. After ion-exchanging sorption of mercury and its compounds from sewage water, purified water is alkalified. Mercury-containing sludge after filtration and waste sorbent after sorption are sent to recycling. Processing of anionite with water suspension containing dichloratin is carried out ensuring foam-extinguishing and even distribution of dichloratin in suspension.

EFFECT: reduction of mercury concentration in purified water to values not exceeding hygienic norm with simultaneous increase of productivity and efficiency of purification from mercury both in ionic and in metallic form.

3 cl, 3 dwg