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액막법에 의한 습식 인산 중의 우라늄(VI) 회수 연구(II)

A Study on the Recovery of Uranium(VI) from Wet Process Phosphoric Acid by Liquid Surfactant Membrane(II)

김광욱 유재형 박현수

Kim KW Yoo JH Park HS

HWAHAK KONGHAK, June 1986, 24(3), 171-177(7), NONE

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Abstract

에멀젼형 액막을 이용하여 습식 인산 중에 함유된 우라늄을 회수할 때 물질전달 속도를 묘사할 수 있는 모델을 제시하였다. 우라늄 추출을 위한 담체로서는 추출상승효과（Synergistic effect）를 나타내는 D₂EHPA와 TOPO의 혼합물을 사용하였다. 물질전달속도의 지배인자로는 액막을 통과하는 우라늄 착물의 확산속도 뿐만 아니라 유효물질전달계수로 표시한 우라늄의 역추출속도를 동시에 고려하였다. 그리고 W/O/W계의 에멀젼의 파괴도를 모델에 반영하였다. 결과적으로 본 모델에 의한 추정결과는 실험결과와 비교적 잘 일치하였다.

A new model was proposed for mass transport through liquid surfactant membrane in the recovery of uranium from the wet process phosphoric acid. The synergistic combined extractant of di（2-ethylhexyl） phosphoric acid (D₂EHPA) plus trioctylphosphine oxide (TOPO) was used as a carrier in the W/O/W system. The stripping of uranium, described by using an effective mass transfer coefficient, was considered as a rate controlling step together with the diffusion of uranium complex across the membrane. The breakage of emulsion in the W/O/W system has also been considered in this model.
Consequently, the predicted result by the present model was found to be in fairly good agreement with the experimental result.

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