SU399513A1 - METHOD OF OBTAINING IONITE - Google Patents

Description

one

The invention relates to the field of synthetic ion exchange resins.

A known method for the preparation of carboxyl cathnoite based on salidic acid and furfural, which selectively absorbs ions of certain metals from alkaline solutions.

In order to obtain ion-exchange resin, its absorption, and ions of some metals in a wide range of pH of the medium, a method has been proposed for obtaining a heat-resistant ampholt by the condensation of salicylic acid, polyethylene polyamine and furfurol. The use of salicylic acid and polyethyleniolimine as waste materials containing ionogenic groups allows the preparation of a pop-meme resin containing, in addition to the Kapi6oKspliya group, secondary and tertiary amino groups. Using the available available heterocyclic aldehyde, furfural as a CHJH agent, makes it possible to obtain ampolites with high mechapic strength, thermal and chemical resistance.

The reaction of full condepsapins is carried out at a temperature scale (40 ° C) in a solution of dmstnlf0r.m.m) 1 yes.

Synthesized amphoteric nonite possesses high chemo and heat resistance,

BbicoKoif same selectivity to iiOHa r copper. nickel

Pr) nmer. In a three-necked flask equipped with a mechanical scaffold, a thermometer and a reflux condenser, 13.2 g (0.1 mol) of the following solution was placed: 1) Lovo 1 acid dissolved in 13.2 g of dimethylformamide Irie WC and melting agent from the flask were injected with 15 g (0.35 mol) of polpetnlenpolaminam. dissolved in 15 g of dimethylformamil. After 30–40 minutes, 12 ml (0.15 mol) of furfural is carefully added dropwise.

after 40-50 min

At this temperature

I rewrite the gel into a gel that

in a thermopacapha with a forov cup and dried to 90-10 ° C for 48

hour. A distilled grit was washed off.

from the industrial milk molecule BeniecTii.

Characteristics of ampholyte: humidity - 18%. bulk liec - 0.6 g / mt, specificity 1Y | 1 iia6yxniero in water ampho.tita - 2.8 ml / g, static capacity of 0.1 n. HC1- 4.8 mG9kv / g, 0.1 n. HAON - 3.2 mEq / g, mechanical strength - 99%. The chemical resistance of ampolpta is determined by ismeremia, ESR 0.1 n each. IS1 after contact with solutions: 5 n. NaOH - 3.6 mEq / g, 5 n. .i- 4.2 mg-eq / g, 10% solution of hydrogen irekisp - 1.8 mg-eq / g.

3

 The heat resistance in air is determined by the weight loss by heating ampolite li for 6 hours at 180 ° C, and weight gain is 2%.

Those that are intact are ampholite nrin kin chen for 10 hours in solutions, alkali. ceriHoii acids and in water are determined by changing the static exchange capacity, which is 4.3 mEq / g for water, 5 n. NaOH - 3.8 mEq / g, 5 n. H2SO4 - 3.6 mEq / g.

The capacity of amphoLITA for iop med1 is 1.2 mg-eq / g (pH 2.5), 1.6 mg-eq / g (pH 4.2). 2 mg-eq / g (pH 10), according to nickel -

equg (: p1-1 4,2).

P

and

The method of half ion1: that paln} ondensiaii of the salp: cyclic acid and furfural, characterized in that, with the heat sprays homoi of heat-resistant ammonia ion exchanger, in a full-condensation mixture, it was added to the floor;