Method for extracting vanadium from vanadium-containing solution

A solution and extraction technology, which is applied in the field of vanadium extraction, can solve the problems of reduced unit emulsion processing capacity, lower production efficiency, and large amount of extractant, and achieve the effects of less amount of extractant, high production efficiency, and strong continuous productivity

Inactive Publication Date: 2016-12-14
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the leachate is diluted, the processing capacity of the unit emulsion decreases, and the production efficiency is also reduced.
[0005] In summary, when extracting vanadium-containing solutions, the existing process has the disadvantages of large amount of extractant, long extraction stages, and low production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for extracting vanadium from a solution containing vanadium. The concrete steps of described method are:

[0032] Step 1. Prepare and mix the organic phase

[0033] Mix 5-9% of carrier, 8-9% of liquid paraffin, 2-5% of surfactant and the rest as film solvent to obtain a mixed organic phase according to volume percentage.

[0034] Step 2. Prepare the emulsion

[0035] Then mix the organic phase according to the description: the volume ratio of the stripping agent is 1: (1 ~ 1.1), add the stripping agent to the mixing organic phase, and make it under the condition that the rotation speed is 2000 ~ 3000r / min Stir for 5 to 20 minutes to obtain an emulsion.

[0036] The concentration of the stripping agent is 0.2-1mol / L.

[0037] Step 3, liquid film extraction

[0038] According to the volume ratio of the emulsion: the vanadium-containing solution is 1: (2 ~ 5), the emulsion and the vanadium-containing solution are mixed, stirred for 10 ~ 30min, left to stand, ...

Embodiment ２

[0046] A method for extracting vanadium from a solution containing vanadium. Except following components all the other are with embodiment 1:

[0047] The carrier is a mixture of an alkaline extractant and a neutral extractant; the surfactant is a polyamine surfactant; the membrane solvent is a mixture of alcohols and ketone organic solvents; the stripping agent is sodium carbonate solution.

Embodiment 3

[0049] A method for extracting vanadium from a solution containing vanadium. The concrete steps of described method are:

[0050] Step 1. Prepare and mix the organic phase

[0051] Mix 7-11% of carrier, 9-10% of liquid paraffin, 3-6% of surfactant and the rest as film solvent to obtain a mixed organic phase.

[0052] Step 2. Prepare the emulsion

[0053] Then mix the organic phase according to the description: the volume ratio of the stripping agent is 1: (1.1 ~ 1.2), add the stripping agent in the mixing organic phase, and stir under the condition of 2000 ~ 3000r / min at a rotating speed 5~20min, the emulsion is obtained.

[0054] The concentration of the stripping agent is 0.6-1.4mol / L.

[0055] Step 3, liquid film extraction

[0056] According to the volume ratio of the emulsion: the vanadium-containing solution is 1: (3 ~ 6), the emulsion and the vanadium-containing solution are mixed, stirred for 20 ~ 40min, left to stand, and phase-separated to obtain a loaded vanadi...

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PUM

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Abstract

The invention relates to a method for extracting vanadium from a vanadium-containing solution. According to the technical scheme, a surfactant, a carrier, liquid paraffin and a membrane solvent are mixed evenly, and an evenly-mixed organic phase is obtained; then a back-extractant is added into the evenly-mixed organic phase, stirring is conducted, and an emulsion is obtained; the vanadium-containing solution and the emulsion are mixed, stirred and subjected to standing and phase splitting, and a vanadium-loaded solution and primary raffinate are obtained; the vanadium-loaded solution is subjected to demulsification and phase splitting, and a lean organic phase and a vanadium-rich solution are obtained; and the lean organic phase and the primary raffinate are mixed, stirred and subjected to standing and phase splitting, a vanadium-loaded organic phase and secondary raffinate are obtained, and the vanadium-loaded organic phase is directly returned to make an emulsion again. The method has the characteristics of being small in extractant usage quantity, short in technological process and high in vanadium recovery rate, production efficiency and continuous productbility.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from stone coal. Specifically relates to a method for extracting vanadium from vanadium-containing solution. Background technique [0002] Extraction of V from stone coal 2 o 5 It has become an important way for my country to obtain vanadium resources. Due to the complex occurrence state and low grade of vanadium, it is necessary to use concentrated acid or strong acid for leaching, resulting in the pH value of the leach solution below 0, the concentration of Al in the impurity ions is 10-20g / L and the concentration of Fe is 4-8g / L, so that The subsequent purification and enrichment process is difficult to carry out normally. [0003] When dealing with this high-acid and multi-impurity leachate, the ion exchange process has problems such as low separation efficiency and easy resin poisoning (Li W. Comparison of ion exchange and solvent extraction in recovering vanadium from sulfuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B3/40C22B34/22
CPCC22B34/22C22B3/41Y02P10/20
Inventor 张一敏刘红艾军郝文彬刘涛黄晶包申旭
Owner WUHAN UNIV OF SCI & TECH
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