SU451722A1 - Method of producing ion exchangers - Google Patents

Description

(54) METHOD FOR OBTAINING IONITE

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The invention relates: to the field of synthetic ion-exchange resins used as sorbents, complexing agents, and for other purposes.

The known method is obtained by ion-exchange resins by conojinKOHflencauHjf a mixture of epichlorohydrin and amshga (ammonia, polyethylene

and etc.)

The disadvantage of this method is the lack of selectivity of sorbents for sorbing heavy metals.

With the creation of ion exchangers selective for nickel, a method for their preparation by copolycondensation of a mixture of ethyl chlorohydrin, amine and nickel-selective complexing agent thiosemicarbamide is proposed.

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As the amine, ammonia, polyethylene polyamides, and other primary and secondary amines can be used.

The process of copolycondensation is carried out by dividing methods - precondensation of epichlorohydrin with thiosemicarbazide followed by hardening of the oligon with polyethylene polyamines or pre-test co-condensation of thiosemicarb-

zida with poly these leppo; shamina followed by curing of the oligomer with epichlorohydrin (or eio oligomer with ammonia).

Synthesized ionites are selective for nickel in the presence of lump and cobalt

(separation factor 106-158), for mice, silver, mercury, and can be used to isolate and separate these elements from solutions.

PRI me R 1. In the reactor, equipped with

devices for heating and cooling, mixing, measuring temneture, removing vapor and ammonia absorption load 232 masses, including (1 mol) polyethylene line

.Nov and 91 mass, parts (1 mol) of thiosemicarbazide, the mixture is heated to 110-12 ° C and maintained at this temperature for 6-1 O hour until the discharge and absorption in the receiver 34 mass, h, ammonia, In the reactor, receive

289 masses, h, of condensation product, arising from a viscous, dark-dark, cold liquid with a sulfur content of 10.9% and 32.2%. The condensation product paciBO. Is boiled at 290 wt, h, water, cooled, and

with TeMnepa-j-ype 4О-5О С, but gradually, with

.,.,, - “V. :

289 wt. including epichlorohydrin. After the total amount of epichlorohydrin is injected, the mass is stirred for 10 minutes, poured into a baking tray and cured at 7 ° C for 3-4 hours. The product was then crushed into pieces of 20-.40 mi. and heat-treated at 100 ° C for 18-22 hours. After the final grinding; - SRI receive 53O masses, including particles from. 0.3 to 1.5 mm - with a separation factor of Ka 25 and a mouse capacity of copper electrolyte (composition, g / l: Su 44; 10.33; 5 9.06;, SS 0.53 178) equal to 28 mg / g. Example 2. In a reactor equipped with a refrigerator, devices for stirring, measuring temperature, heating and cooling, load 14 masses. including thiosemicarbazide - base and 50 mass, h, water. The resulting solution is heated to 62 ° C and at this temperature 67 masses are introduced in small portions. including epichlorohydrin. Then the temperature of the reaction mass is increased to 1OO ° C and maintained at this temperature for 8 hours, obtaining a homogeneous water-soluble oligomer. To it is added at a temperature of 40 ° C to 48 wt. After mixing, the mass of 50% aqueous solution of polyethylene polyamine jHj is poured into the pan. Curing is carried out at 70 ° C for 5 hours. Then the product is crushed into pieces of mm and heat-treated for 60 hours. After the final crushing, 94 mass, h, irnite with a size of 0.3-1.5 mm with the following properties are obtained: static exchange capacity according to O, 1 n HC1 and 8.2 mg / eq. The capacity for nickel from a solution containing 1 g / l nickel and 100 g / l zinc was BT 60 mg / g, separation factor K2 165. Capacity from a cobalt electrolyte solution containing 50 g / l Co, 2 g / l / vL, was: em nickel 7 6 mg / g, cobalt 18 mg / g. The separation factor K /, the separation coefficient K 106. The capacity of the decine-normal solutions of mercury nitrate is 530 mg / g, silver nitrate 528 mg / rV. Subject of the Invention creating nickel-selective sorbet, add thios mycarbazide to the mixture.