SU1669930A1 - Method of anionite preparation - Google Patents

Abstract

The invention relates to methods for producing anion exchanger for sorption of metal ions in hydrometallurgy. The invention allows to simplify the process and increase the exchange capacity of the ion exchanger due to the interaction of the chloromethylated styrene copolymer with hexamethylenetetramine in the medium consisting of a mixture of chloroform and dimethylformamide at their ratio (volume) 1: (0.6 - 1.2), at 55 - 60 ° C for 1 - 1.5 h followed by hydrolysis. 1 tab.

Description

The invention relates to a method for the preparation of anion exchange resin, which can be used as a sorbent for metropl ions in hydrometallurgy.

The purpose of the invention is to simplify the synthesis process and increase the exchange capacity of the ion exchanger.

Example 1 (for comparison). 5 g of chloromethylated styrene copolymer and divinylbenzene of a macroporous structure are placed in a reactor, 175 ml of chloroform and 25 ml of dimethylformamide (volume ratio 1: 0.14) are added, 25 g of hexamethylene tetramine are added. The molar ratio of copolymer, hexamethylenetetramine is 1: 5.4. The reaction is carried out for 1 h at 60 ° C.

After cooling the reaction mixture, the granules are separated and treated.

a mixture of 10% aqueous solution of hydrochloric acid and ethyl and methyl alcohol at 60 ° C for 1 h

The ion exchanger is converted to OH-form and washed. SOYA 0.1 n. Solution of HCI 2.48, the content of introduced nitrogen 3.51%

Example 2 (for comparison). 5 g of chloromethylated copolymer of styrene and divinylbenzene of macroporous structure are poured with 150 ml of chloroform and 50 ml of dimethylformamide (volume ratio V0.33). 25 g of hexamethylene tetramine are added. Condition the reaction and further processing as in example 1. ESR of the final

. n. mg- ECV product 4.01, quantity of water

of nitrogen nitrogen 5,92%.

ABOUT

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Example 3.5 g of a chloromethylated copolymer of styrene and divinylbenzene of a macroporous structure is mixed with 125 ml of chloroform and 75 ml of dimethylformamide (1: 0.6), 25 g of hexamethylene tetramine are added. Further, the method is carried out according to

, l / -V g-G- -H GEC B

Example 1. SOY is 5.12,

nitrogen content 8.17%.

EXAMPLE 4. The method is carried out as in Example 1, the reaction is carried out at 55 ° C for 1.5 hours. To 5 g of chloromethylated copolymers of styrene and divinylbenzene of a macroporous structure, 100 ml of chloroform and dimethylformamide (1: 1 ), add 25 g of hexamethylenetetramOJ / R

on, SOY 6.57, the amount of nitrogen

9.30%.

Example 5. To a 5 g of chloromethylated copolymer of styrene and divinylbenzene of a macroporous structure, 90 ml of chloroform and 10 ml of dimethylformamide (1: 1.2) are added. Then the reaction is carried out in 1 hour as in

PLNG-

example 4. SOYU 5.85 ---, content

nitrogen in the final product of 8.43%.

Example 6 (for comparison) Anion exchanger prepared according to Example 1. 5 ml of chloroform and chloroform and 115 ml of dimethifolrammaid are added to 5 g of chloromethylated copolymer of styrene and divinylbenzene of a macroporous structure. SOY 0.1 n. hydrochloric acid solution

, on mg-eq

5.32, the amount of nitrogen introduced

is 7.86%.

PRI me R 7 (prototype /). 5 g of chloromethylated copolymer of styrene and divinylbenzene macroporous structure pour 200 ml of chloroform. The process is then carried out analogously to example 1. SOY

Ol i p l MG% ZKV, 1 n. a solution of HCI 2,1-, the nitrogen content of 3.01%.

Example 5 g of a chloromethylated copolymer of styrene and divinylbenzene of a helium structure are poured in equal volumes of dimethylformamide and chloroform 100 ml (1: 1). Condition the reaction and further processes as in Example 1. ESR 4.27

 , the nitrogen entered 6,13%.

5 Example 9. 5 g of chloromethylated copolymer of styrene and dimethacrylamide diamine diphenylmethane of a macro-structured structure are filled with 100 ml of chloroform and 100 ml of dimethylformamide. Further as in an example

0 1 / -gs1 1 1 MG-EKV

1. SOY 7.1 - nitrogen content

9.87%.

The data for the examples are tabulated.

five

Claims (1)

CLAIMS A method for preparing the anion exchanger by amino nirovani crosslinked chloromethylated copolymer of styrene in the medium SG geksametilentetrami0 chloroform with heating, followed by hydrolysis, characterized in that, in order to increase the exchange capacity of the ion exchanger and to simplify the process, is added to chloroform dime5 tilformamid with chloroform ratio by volume: dimethylfbrmamide, equal to 1: (0.6-1.2) and amination is carried out at 55-60 ° C for 1.0-1.5 h.