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Mixed amine extraction agent for separation of molybdenum and vanadium and method for separating and recovering molybdenum and vanadium from waste catalyst

A waste catalyst, separation and recovery technology, applied in the direction of improvement of process efficiency, etc., can solve the problems that the separation of vanadium and molybdenum cannot be realized, and the separation coefficient is not much different, and achieve good organic phase cycle performance, large saturation capacity, extraction and stripping good performance effect

Active Publication Date: 2018-12-18
肇庆市珈旺环境技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are a large number of related reports on the extraction and separation of tungsten, molybdenum, vanadium and other anions with amine extractants. High, short phase separation time, excellent extraction and stripping performance, etc., but imidazoline extractants have similar extraction capabilities to vanadium and molybdenum, and the separation coefficient is not much different. They are mainly used to extract vanadium and molybdenum, but cannot achieve vanadium molybdenum. separate

Method used

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  • Mixed amine extraction agent for separation of molybdenum and vanadium and method for separating and recovering molybdenum and vanadium from waste catalyst
  • Mixed amine extraction agent for separation of molybdenum and vanadium and method for separating and recovering molybdenum and vanadium from waste catalyst
  • Mixed amine extraction agent for separation of molybdenum and vanadium and method for separating and recovering molybdenum and vanadium from waste catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Accurately measure the mixed amine extractant with a volume fraction of 16% (the volume ratio of formula 1 and formula 2 is 1:1) + 14% isooctyl alcohol + sulfonated kerosene, mix well, and dilute hydrochloric acid and sodium chloride After pretreatment of the mixed solution, for Mo101.00g / L, V 2 o 5 9.87g / L of vanadium and molybdenum leachate was extracted, compared with O / A=1:2, the oscillation frequency was 190r / min, oscillated for 10min at room temperature, and solid sodium hydroxide was added to change the pH of the leachate, the extraction rate and separation of molybdenum and vanadium The coefficients are shown in Table 1:

[0050] Table 1 Effect of equilibrium pH on extraction and separation of molybdenum and vanadium in leach solution

[0051] balance pH

[0052] It can be seen from Table 1 that when the equilibrium pH is in the range of 7.5 to 9, the extraction rate of vanadium by the extractant remains at a relatively high level, and the molybdenu...

Embodiment 2

[0054] Accurately measure a mixed amine extractant with a volume fraction of 15% (the volume ratio of formula 1 and formula 2 is 2:1) + 15% isooctyl alcohol + sulfonated kerosene, mix well, and mix with dilute hydrochloric acid and sodium chloride After solution pretreatment, for Mo 101.00g / L, V 2 o 5 9.87g / L of vanadium and molybdenum leachate was extracted, compared with O / A=1:2, the oscillation frequency was 190r / min, oscillated for 10min at room temperature, and solid sodium hydroxide was added to change the pH of the leachate, the extraction rate and separation of molybdenum and vanadium The coefficients are shown in Table 2:

[0055] Table 2 Effect of equilibrium pH on extraction and separation of molybdenum and vanadium in leach solution

[0056] balance pH

[0057] As can be seen from Table 2, when the equilibrium pH is near neutral, the extraction rate of vanadium is kept at a relatively high level by the extractant, but compared with Example 1, the extra...

Embodiment 3

[0064] The composition of the organic phase is: 15% mixed extractant (the volume ratio of formula 1 and formula 2 is 2:1) + 12% isooctyl alcohol + 73% sulfonated kerosene, for Mo 101.00g / L, V 2 o 5 9.87g / L of vanadium-molybdenum leach solution was used for phase-distorted extraction, the oscillation frequency was 190r / min, and the oscillation frequency was 10min at room temperature. The pH of the feed solution was 9.12. The extraction isotherms of molybdenum and vanadium were as follows: figure 1 Shown:

[0065] From figure 1 It can be seen that as the ratio O / A decreases, the content of vanadium in the organic phase increases rapidly at first, and then tends to remain unchanged. At this time, the content of vanadium in the organic phase reaches saturation. It can be known that, when the extractant content is 15%, the saturation capacity of vanadium in the organic phase is 20.87g / L. In addition, according to the isotherm curve of Mo, it can be seen that the organic phase c...

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Abstract

The invention relates to a mixed amine extraction agent for separation of molybdenum and vanadium and a method for separating and recovering the molybdenum and the vanadium from a waste catalyst. Themixed amine extraction agent comprises imidazole compounds and quaternary ammonium compounds. The method for separating and recovering the molybdenum and the vanadium from the waste catalyst includesthe steps that the waste catalyst containing the molybdenum and the vanadium is subjected to alkaline leaching to obtain extraction liquid containing the molybdenum and the vanadium, the extraction liquid containing the molybdenum and the vanadium is extracted and separated by using an organic phase containing the mixed amine extraction agent, raffinate is a solution containing the molybdenum, anda solution containing the vanadium is obtained by washing and stripping a loaded organic phase. The mixed amine extraction agent has the characteristics of high saturation capacity, short phase separation time, excellent extraction and reverse extraction performances, high molybdenum-vanadium separation coefficient and the like, can achieve high efficiency separation of the vanadium and the molybdenum in an alkaline solution system, and has a good industrial application prospect.

Description

technical field [0001] The present invention relates to a combined extractant, and also relates to a method for separating and recovering molybdenum and vanadium from waste catalyst leaching liquid by using the combined extractant, so as to realize resource utilization of hazardous solid waste containing molybdenum and vanadium spent catalyst, which belongs to the resource recovery and utilization of solid waste field of hydrometallurgy. Background technique [0002] Due to the over-exploitation of molybdenum-vanadium mineral resources and the rapid development of science and technology, the application range of molybdenum, vanadium and their compounds is continuously expanding, and the consumption is increasing day by day. The limited resources are decreasing day by day, and the grade of ore is gradually decreasing. Therefore, how to effectively enrich valuable metals such as molybdenum and vanadium and separate them from other high-content impurities is a test for domesti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/40C22B34/22C22B34/34
CPCC22B7/006C22B7/009C22B34/225C22B34/345C22B3/402Y02P10/20
Inventor 侯浩波梁安娜雷杰妮罗腾何雯婧李政家
Owner 肇庆市珈旺环境技术研究院
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