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46

Журнал «Интернаука»

№ 16 (145), часть 3, 2020 г.

CHEMISTRY

SYNTHESIS OF TBP-ST-DVB EXTRACTANT POLYMER RESIN AND SEPARATION

OF RADIOACTIVE GALLIUM CHLORIDE

Kim Chung Hyok

Candidate of chemical sciences, Kim Il Sung University,

DPRK, Pyongyang

Im Jon Gil

Doctor of chemical sciences, associate Professor, Kim Il Sung University,DPRK, Pyongyang

Pak Ho Song

Candidate of chemical sciences, Kim Il Sung University,

DPRK, Pyongyang

ABSTRACT

TBP-St-DVB extractant polymer resin was prepared from tri-butylphosphate, styrene and divinylbenzene by suspension polymerization. On extraction chromatograph column, while kinetic process of Ga extraction could be assumed to be simultaneous process of film diffusion and gel diffusion, activation energy of Ga extractive reaction on column was E*=14.92kJ·mol-1.

Keyword: extractant, polymer resin, synthesis, Gallium, Zinc, separation.

1. Introduction

2.2. Extraction of Ga and Zn with TBP-St-DVB ex-

Extractant polymer resins are new type of separa-

tractant polymer resin

tion functional materials that have advantages of solvent

Static condition

extraction and ion exchange technology and overcome

First, extractant resin was swollen in 1mol·L-1 HCl

disadvantages of those.

solution for 24h. Then 1mL of 67Ga solution

In early papers, kinetics of Ga separation by TBP-

(40kBq·mL-1) was injected into 10mL of hydrochloride

St-DVB extractant polymer resin was not studied.

acid solution (concentration of Ga ion; 20mg·L-1) and In this paper, results of kinetic research about 67Ga

mixed. 1g of extractant resin (TBP concentration 30%, separation on hydrochloride solution from Zn target

granular size 0.3~0.4mm) was applied into solution and

bombed by ion beam accelerator were described based

mixed at 60rpm. Equilibrium time was determined when

on synthesizing TBP-St-DVB extractant polymer resin

radioactivity of solution didn’t change by time.

containing TBP as extractant.

Dynamic condition

2. Experimental

A glass column (0.8×25cm) was packed with 0.8g

2.1. Synthesis of TBP-St-DVB extractant polymer

of swollen 30% TBP-St-DVB extractant resin and

resin

washed with HCl solution.

Synthesis of extractant polymer resin containing

GaCl3/6mol·L-1 HCl solution was flown through the

30% TBP was carried out in glass reactor supplied by a

column at flow rate of 1mL·min-1 to extract 67Ga. After

mixer, a thermometer and a reversed refrigerator.

removing Zn with 6mol·L-1 HCl solution, 67Ga was

First, starch solution (0.5%) as emulsion stabilizer

back-extracted with 1mol·L-1 HCl solution.

was loaded into reactor and kept temperature of 323K.

3. Result and discussion

Then, organic phase reaction mixture containing sty-

3.1. Extractions of Ga and Zn by extractant polymer

rene, divinylbenzene and initiator (benzoyl peroxide)

resin (static condition)

was fed into reactor under 323K and working mixer for

3.1.1. Extraction equilibrium time

30min. Co-polymerization reaction was carried out un-

Under the static condition (6 mol·L-1 HCl solution,

der 353K for 8h and continuing polymerization reaction

1g of extractant resin), experimental results of determin-

under 363K for 1h. After reaction was finished, synthe-

ing extractability of Ga and Zn were shown in Table.1.

sized polymer was separated by decantation, washed

2~3 times with deionized water and dried.

Table 1.

Extractability (%) of Ga and Zn to TBP extractant polymer resin by time on HCl solution