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A kind of regeneration method of organic extractant

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: 2018-05-29
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 extractant with a concentration of 1.5mol / L into a 1000L reactor, add 50L of oxalic acid solution with a concentration of 0.8mol / L to it, stir for 5min, clarify the layers, drain the water phase and add OH - The mixed solution of sodium carbonate and sodium bicarbonate (weight ratio: 3:1) 200L with a concentration of 1.8mol / L, clarify and separate after stirring for 10min, drain the water phase and add H + 100L of a hydrochloric acid solution with a concentration of 5.0mol / L, stirred for 10min to clarify and layer, drain the water phase and add 50L of pure water, stir for 10min, clarify and layer, the remaining organic phase after draining the water phase is the regenerated P507.

Embodiment 2

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

Embodiment 3

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

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PUM

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Abstract

The invention discloses a regeneration method of an organic extractant, which comprises the following steps: acid reaction, alkali reaction, inorganic acid reaction and pure water treatment. The present invention utilizes the characteristics that the metal ions that partially cause the "poisoning" of the organic extractant to combine with oxalic acid or sodium carbonate or sodium bicarbonate are greater than the organic extractant, and back-extract these metal ions from the organic extractant into the aqueous phase , to achieve the purpose of organic extractant regeneration, this method can not only effectively remove the metal ions in the organic extractant, improve the extraction and separation ability of the organic extractant, but also has the characteristics of short process flow, simple equipment, and easy operation. A good regeneration method of organic extractant.

Description

Technical field [0001] The invention relates to the technical field of metallurgy, in particular to a regeneration method of an organic extractant. Background technique [0002] In hydrometallurgy, organic extractants have different extraction capabilities for different non-ferrous metal elements. Therefore, 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 method using organic extractants. Common organic extractants are divided into acid extractants, neutral extractants, and amine extractants. Among them, acid extractants include P204, P507, Cyanex272, naphthenic acid, etc., and neutral extractants include TBP, P350, TOPO, etc. Class extractions include tri-n-octylamine, N235, N503, etc. With the recycling of organic extractants in the production process, some metal ions that are easily extracted form relativel...

Claims

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Application Information

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Patent Type & Authority Patents(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