Method for extracting molybdenum from molybdenum-containing high-concentration acidic lixivium and application of extraction agent

An acid leachate, high-concentration technology, applied in the field of molybdenum extraction, can solve the problems of complex process, high cost, and inexhaustible removal of impurities when extracting molybdenum, and achieves the effects of simple operation, high recovery rate, and reduction of neutralization procedures.

Active Publication Date: 2013-08-14
CENT SOUTH UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the defects of inexhaustible removal of impurities, high cost and complicated process in the treatment method of molybdenum-containing acidic immersion solution in the prior art, and aims to provide a short process, simple operation and low cost from the molybdenum-containing immersion solution. A method for extracting molybdenum with high selectivity and high efficiency in molybdenum high-concentration acidic leaching solution, which is suitable for industrial applications

Method used

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  • Method for extracting molybdenum from molybdenum-containing high-concentration acidic lixivium and application of extraction agent
  • Method for extracting molybdenum from molybdenum-containing high-concentration acidic lixivium and application of extraction agent
  • Method for extracting molybdenum from molybdenum-containing high-concentration acidic lixivium and application of extraction agent

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Experimental program
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Effect test

Embodiment 1

[0029] according to figure 1 The process flow is operated;

[0030] The feed liquid is dephosphorylated scheelite acid decomposition liquid, containing molybdenum 8.328g / L, free H + The concentration is 6.189mol / L;

[0031] The organic phase is 10% extractant + 5% TBP + sulfonated kerosene;

[0032] A separatory funnel was used for single-stage extraction, the extraction ratio (O / A) = 1 / 1, the extraction time was 10 minutes, the temperature was 30°C, and the phase separation was 1 minute. The raffinate contained molybdenum 1.252g / L, and the molybdenum extraction rate reached 85.0 %.

Embodiment 2

[0034] according to figure 1 The process flow is operated;

[0035] The feed liquid is dephosphorylated scheelite acid decomposition liquid, containing molybdenum 8.328g / L, free H + The concentration is 6.189mol / L;

[0036] The organic phase is 10% extractant + 5% + 85% sulfonated kerosene;

[0037] A separatory funnel was used for single-stage extraction, the extraction ratio (O / A)=1 / 1.5, the extraction time was 10 minutes, the temperature was 30°C, and the phase separation was 1 minute. The raffinate contained molybdenum 1.362g / L, and the molybdenum extraction rate reached 89.1 %.

[0038] The above-mentioned loaded organic phase was back-extracted with 12.5% ​​ammonia water according to the ratio (O / A)=4:1, the stripping time was 10min, the temperature was 40°C, the stripping solution contained molybdenum 32.58g / L, and the molybdenum stripping rate reached 73.2%.

Embodiment 3

[0040] according to figure 1 The process flow is operated;

[0041] The feed liquid is scheelite middle ore dephosphorization mother liquor, containing 0.374g / L molybdenum, 5.451g / L phosphorus, free H + The concentration is 0.912mol / L;

[0042] The organic phase is 10% extractant + 5% TBP + sulfonated kerosene;

[0043] Use a separatory funnel for single-stage extraction, the extraction ratio (O / A)=1 / 1, the extraction time is 10min, the temperature is 30°C, and the phase is separated for 1min. The raffinate contains 0.0092g / L of molybdenum and 5.385g / L of phosphorus. L, the molybdenum extraction rate reaches 97.5%, and the phosphorus extraction rate is only 1.2%.

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Abstract

The invention discloses a method for extracting molybdenum from molybdenum-containing high-concentration acid lixivium and an application of an extraction agent. The method comprises the following steps of: directly extracting the molybdenum-containing high-concentration acid lixivium by utilizing the extraction agent; and obtaining ammonium molybdate or sodium molybdate solution by carrying out back-extraction on an extracted loaded organic phase by utilizing ammonia water or NaOH solution to obtain ammonium molybdate or sodium molybdate solution. The application is used for selectively extracting the molybdenum from the molybdenum-containing high-concentration acid lixivium so as to separate the molybdenum from impurities such as phosphorus, arsenic, silicon, iron, aluminum, calcium and magnesium in acid solution. The method disclosed by the invention is short in process, simple in operation and low in cost; and the extraction agent is used for extracting the molybdenum from the molybdenum-containing high-concentration acid lixivium, is high in extraction efficiency of the molybdenum and can be industrially applied.

Description

technical field [0001] The invention relates to a method for extracting molybdenum from a molybdenum-containing high-concentration acidic leaching solution and the application of an extractant, belonging to the field of molybdenum extraction. Background technique [0002] Molybdenum-containing scheelite medium ore adopts the method of chemical beneficiation to produce high-grade scheelite concentrate, and at the same time, a large amount of chemical beneficiation acid leach solution containing molybdenum, tungsten, phosphorus, arsenic, etc. will be produced. Molybdenum-containing scheelite concentrate is produced by acid decomposition method to produce tungstic acid, and the acid mother liquor also contains a large amount of molybdenum. The direct discharge of these molybdenum-containing acid solutions not only wastes valuable metals, but also seriously pollutes the environment. [0003] The treatment methods for this type of molybdenum acid-containing immersion solution mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/30
CPCY02P10/20
Inventor 肖连生曾理李青刚张贵清曹佐英廖小丽
Owner CENT SOUTH UNIV
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