SU412771A1 - Method of obtaining anionites - Google Patents

Description

This invention relates to the synthesis of ion-exchange resins of special purpose, suitable for work in organics. A known method for producing ion exchangers by aminating with ethylene diamine a chloromethylated styrene copolymer with divinylbenzene. The purpose of the invention is to develop a method for producing anion exchange resin that has swelling properties in both aqueous and organic polar and non-polar media, and therefore suitable for cleaning organic liquids from acidic contaminants and other impurities. This goal is achieved by using xylylenediamine as the amino compound, the dialkyl aromatic radical of which gives the ion exchanger the desired oleophilicity, while the weakly basic amino groups retain a slight hydrophilicity. Example. In the reactor, equipped with a reflux condenser, with a device for stirring, heating, and measuring, temperature was charged, 12 parts by weight was charged. chloromethylated copolymer of styrene with divinylbenzene of macroporous structure (crosslinking 12%, inert diluent - isooctane in the amount of 80% of the total monomers; chlorine content 17.6%), then add 12 parts by weight. dioxane and allowed to swell for 12 hours. The reactor is then filled with nitrogen and 20 wt. is poured into the swollen copolymer. m-xylylenediamine, the temperature of the mixture is raised to and lead to amination in a nitrogen atmosphere for 6 hours. After the amination, the solid phase is separated from the liquid to obtain 19 parts by weight granules of anion exchange resin and 13 weight.h. unreacted xylylenediamine with some content of the hydrochloride salt of amine. The anion exchanger granules are washed with water until there is no amine in the filtrate, and 30% by weight are obtained. anion exchange resin with a humidity of 38% and the following values of the specific volume in the swollen state, ml / g: Water2.3 Transformer oil2.1 Butyl alcohol2.7 Hexane2.5 Benzene2.7

2.5

Dicloroethane 2,3

Dibutyl phthalate

Similarly, receive the anion exchange resin, zamey M-ysylylenediamine on p-xylylenediamine. In this case, a more dense, less swelling anion exchange resin is obtained. Specific volume in the swollen state, ml / g:

Water .1,9

Benzene2,5

Butyl

alcohol2.5

Dibutyl phthalate 2.1

Static exchange capacity 0.1 n. HCE 4.3 mEq / g. Oxidation of the filtrate About MrOg / r.

Claims (1)

Invention Formula The method of producing anion exchangers by aminating with a diamine a chloromethylated styrene copolymer with a divinyl compound, characterized in that xylylenediamine is used as the diamine in order to obtain anion exchangers swelling in organic polar and non polar polar media.