KINETICS OF COBALT EXTRACTION WITH MONO-（2-ETHYLHEXYL）2-ETHYLHEXYL PHOSPHONIC ACID FROM NITRATE SOLUTION

Zheng Zuoxi; Gu Zhongmao; Wang Dexi（China Institute of Atomic Energy

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KINETICS OF COBALT EXTRACTION WITH MONO-（2-ETHYLHEXYL）2-ETHYLHEXYL PHOSPHONIC ACID FROM NITRATE SOLUTION

更新时间：2025-12-16

- KINETICS OF COBALT EXTRACTION WITH MONO-（2-ETHYLHEXYL）2-ETHYLHEXYL PHOSPHONIC ACID FROM NITRATE SOLUTION
- CIESC Journal Issue 1, (1996)
- 作者机构：
  
  中国原子能科学研究院!北京102413,中国原子能科学研究院!北京102413,中国原子能科学研究院,北京,102413
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q028
- Online First：25 February 1996，
  
  Published：25 February 1996
- 稿件说明：
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Zheng Zuoxi, Gu Zhongmao, Wang Dexi（China Institute of Atomic Energy. KINETICS OF COBALT EXTRACTION WITH MONO-（2-ETHYLHEXYL）2-ETHYLHEXYL PHOSPHONIC ACID FROM NITRATE SOLUTION[J]. CIESC Journal, 1996, (1).
DOI：

Zheng Zuoxi, Gu Zhongmao, Wang Dexi（China Institute of Atomic Energy. KINETICS OF COBALT EXTRACTION WITH MONO-（2-ETHYLHEXYL）2-ETHYLHEXYL PHOSPHONIC ACID FROM NITRATE SOLUTION[J]. CIESC Journal, 1996, (1). DOI：

摘要

Abstract

The kinetcs of extraction of cobalt with HEHEHP-kerosene solution from aqueous nitrate solution has been studied using the Lewis Cell.The effects of stirring rate and interfacial area were investigated.In the kinetic region

the influences of concentration of cobalt

hydrogen ion and HEHEHP were mainly studied.The effects of the sulphate

chloride

nitrate and acetate ions in aqueous phase on extraction rate were also discussed. The experimental results indicate that the extraction process may be governed by the mixed mechanism of diffusion and chemical reaction.In the kinetion

region，the extraction Process might be controlled by the following interfacial reactions The apparent rate constant was calculated to be about 3.63×10~(-13)mol·cm~(-2)·s~(-1).The sulphate

nitrate and chloride ions decrease the extraction rate in the order of SO_4~(2-)＞NO~(-3)＞CI~-.On the other hand

the acetate ion could greatly increase the extraction rate.The extraction rate with 0.025mol·L~(-1) acetate ion in aqueous phase is about four times of that without acetate ion.

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