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Regeneration method of organic extracting agent

An organic extractant and inorganic acid technology, applied in the field of metallurgy, can solve the problems of reducing the extraction ability of the extractant, the extraction phase separation effect becomes poor, and the extraction "poisoning", etc., and achieves the effect of improving the extraction and separation ability, easy operation and simple equipment.

Active Publication Date: 2016-11-09
CHINALCO JINYUAN RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These metal ions are gradually enriched in the extractant, which reduces the extraction capacity of the extractant, makes the extraction phase separation effect worse, and even makes the extraction "poisoned" or invalid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 500L of P507 extraction agent with a concentration of 1.5mol / L into a 1000L reaction kettle, add 50L of oxalic acid solution with a concentration of 0.8mol / L to it, stir for 5min, clarify and separate, drain the water phase and add OH - The mixed solution of sodium carbonate and sodium bicarbonate with a concentration of 1.8mol / L (weight ratio is 3:1) is 200L, after stirring for 10min, the layers are clarified, and the aqueous phase is drained, and H + 100 L of hydrochloric acid solution with a concentration of 5.0 mol / L, stirred for 10 minutes, clarified and separated, added 50 L of pure water after draining the water phase, and stirred for 10 minutes, clarified and separated, and the remaining organic phase after draining the water phase was the regenerated P507.

Embodiment 2

[0019] Put 500L of naphthenic acid extractant with a concentration of 0.5mol / L into a 1000L reaction kettle, add 100L of oxalic acid solution with a concentration of 0.2mol / L to it, stir for 10min, clarify and separate layers, drain the water phase and add OH - 200 L of sodium carbonate solution with a concentration of 1.5 mol / L, after stirring for 10 min, clarified and separated, drained the water phase and added H + 80L of hydrochloric acid solution with a concentration of 3.0mol / L, after stirring for 10min, clarification and stratification, after draining the water phase, add 100L of pure water, after stirring for 5min, clarification and stratification, the remaining organic phase after draining the water phase is the regenerated naphthenic acid .

Embodiment 3

[0021] Put 500L of N235 extraction agent with a concentration of 0.3mol / L into a 1000L reaction kettle, add 100L of oxalic acid solution with a concentration of 1.0mol / L to it, stir for 8 minutes, clarify and separate, drain the water phase and add OH - 100L of sodium bicarbonate solution with a concentration of 0.5mol / L, after stirring for 8min, clarified and separated, drained the water phase and added H + 50 L of hydrochloric acid solution with a concentration of 5.0 mol / L, stirred for 10 minutes, clarified and stratified, added 200 L of pure water after draining the water phase, and stirred for 15 min, clarified and stratified, and the remaining organic phase after draining the water phase was regenerated N235.

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Abstract

The invention discloses a regeneration method of an organic extracting agent. The method comprises the steps of acid reaction, alkali reaction, inorganic acid reaction and pure water treatment. The method is characterized in that the characteristic that the combining capacity of a part of metal ions poisoning the organic extracting agent with oxalic acid or sodium carbonate or sodium bicarbonate is higher than the combining capacity of the part of metal ions with the organic extracting agent is utilized, the part of metal ions are reversely extracted into aqueous phases, and the purpose of regeneration of the organic extracting agent is achieved. According to the method, metal ions in the organic extracting agent can be effectively removed, the extraction separation capacity of the organic extracting agent is improved, and the method has the characteristics that the technological process is short, the device is simple and the operation is easy and convenient, and is an excellent regeneration method of the organic extracting agent.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for regenerating an organic extractant. Background technique [0002] In hydrometallurgy, organic extractants have different extraction capabilities for different non-ferrous metal elements, so organic extractants are commonly used to separate and purify metal elements. Metal elements such as lanthanides, copper, nickel, cobalt, uranium, indium, tungsten, molybdenum, etc. are all separated and purified by wet methods using organic extractants. Common organic extractants are divided into acidic extractants, neutral extractants, and amine extractants, among which acid extractants include P204, P507, Cyanex272, naphthenic acid, etc., neutral extractants include TBP, P350, TOPO, etc., amine extractants Types of extraction include tri-n-octylamine, N235, N503, etc. With the recycling of organic extractants in the production process, some metal ions that are easily extrac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26
CPCC22B3/26Y02P10/20
Inventor 马朝扬陈建彬吴冬兰黎廷护田莉婷李剑峰
Owner CHINALCO JINYUAN RARE EARTH
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