Method for extracting molybdenum (VI) in water solution

An aqueous solution and extraction technology, applied in the field of materials, can solve the problems of complex process, polluted environment, low separation efficiency, etc., and achieve the effect of wide concentration range, fast extraction rate and good phase separation

Active Publication Date: 2017-05-31
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing technology for separating molybdenum, there are various deficiencies such as low separation efficiency, complicated process, and environmental pollution. How to break through the existing technology and improve the separation efficiency is a problem that those skilled in the art need to solve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Mix and stir nonionic surfactant Tween 80, molybdenum-containing (VI) aqueous solution, sodium sulfate aqueous solution and deionized water to obtain mixed solution 1, and the concentration of nonionic surfactant Tween 80 in mixed solution 1 is 200g / L, molybdenum (VI) concentration is 10g / L, sodium sulfate concentration is 100g / L;

[0022] (2) Sulfuric acid is used to adjust the pH value of step (1) mixed solution 1 to 3 to obtain mixed solution 2;

[0023] (3) Put the mixed solution 2 of step (2) into a constant temperature magnetic stirrer to stir, set the temperature to 40°C, and stir for 20 minutes. After stirring, place it in a constant temperature water bath for phase separation, and the phase separation time For 60min, the upper phase is obtained as the nonionic surfactant phase of loaded molybdenum (VI), and the lower phase is a two-phase system of aqueous phase, wherein the concentration of molybdenum (VI) in the nonionic surfactant phase of loaded molybden...

Embodiment 2

[0027] (1) Mix and stir nonionic surfactant Tween 60, molybdenum (VI) aqueous solution, lithium sulfate aqueous solution and deionized water evenly to obtain mixed solution 1. In mixed solution 1, the concentration of nonionic surfactant Tween 60 is 300g / L, the molybdenum (VI) concentration is 40g / L, and the lithium sulfate concentration is 200g / L;

[0028] (2) Adopting nitric acid to adjust the pH value of step (1) mixed solution 1 to be 2 to obtain mixed solution 2;

[0029] (3) Put the mixed solution 2 of step (2) into a constant temperature magnetic stirrer to stir, set the temperature to 30°C, and stir for 15 minutes. After stirring, place it in a constant temperature water bath for phase separation, and the phase separation time For 50min, the upper phase is obtained as the nonionic surfactant phase of loaded molybdenum (VI), and the lower phase is a two-phase system of water phase, wherein the concentration of molybdenum (VI) in the nonionic surfactant phase of loaded m...

Embodiment 3

[0033] (1) Mix and stir nonionic surfactant Tween 40, molybdenum (VI) aqueous solution, sodium nitrate aqueous solution and deionized water evenly to obtain mixed solution 1. In mixed solution 1, the concentration of nonionic surfactant Tween 40 is 50g / L, the molybdenum (VI) concentration is 1g / L, and the sodium nitrate concentration is 50g / L;

[0034] (2) The pH value of the mixed solution 1 in step (1) is adjusted to 1 by sulfuric acid to obtain the mixed solution 2;

[0035] (3) Put the mixed solution 2 in step (2) into a constant temperature magnetic stirrer to stir, set the temperature to 25°C, and stir for 10 minutes. After stirring, place it in a constant temperature water bath for phase separation, and the phase separation time For 30min, the upper phase is obtained as the nonionic surfactant phase of loaded molybdenum (VI), and the lower phase is a two-phase system of aqueous phase, wherein the concentration of molybdenum (VI) in the nonionic surfactant phase of loade...

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Abstract

The invention provides a method for extracting molybdenum (VI) in a water solution. The method mainly comprises the following steps: uniformly mixing and stirring a nonionic surfactant, a molybdenum containing water solution, a salt solution and deionized water, wherein the nonionic surfactant belongs to a Tween series and is at a concentration of 50-300g / L, the molybdenum concentration is 1-40g / L, and the salt concentration is 50-300g / L; regulating a pH value to 1-4, standing for phase separation after carrying out stirring at 25-50DEG C for 10-30min, and carrying out phase separation for 30-60 minutes so as to obtain a double-water-phase system, wherein the upper phase is a molybdenum-loaded nonionic surfactant phase, the concentration of molybdenum in the upper phase is 2-80g / L, and the lower phase is a water phase; and mixing the molybdenum-loaded nonionic surfactant phase with an ammonium sulfate water solution according to a phase ratio of 1-5, regulating the pH value to 7-10, carrying out reversed extraction at 25-50DEG C for 20-40 minutes, standing for phase separation, carrying out phase separation for 30-60 minutes, and obtaining a product, namely ammonium molybdate. The extracting rate is high, and phase separation is great. The molybdenum extracting rate reaches more than 92%, and the molybdenum reversed extracting rate reaches more than 90%.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for extracting molybdenum. Background technique [0002] Molybdenum is a rare metal with excellent physical and chemical properties such as high high temperature strength and high temperature hardness, low thermal expansion coefficient, good processability, thermal conductivity, electrical conductivity, excellent wear resistance and corrosion resistance. Therefore, it is widely used in many fields such as non-ferrous metal alloys, chemical industry, aerospace, aviation, machinery, nuclear industry, etc. It has a good application prospect and is an important raw material and irreplaceable strategic material in the national economy. [0003] Because molybdenum has excellent characteristics and is widely used, there is a great demand for molybdenum in the national economy. However, due to the unreasonable mining of molybdenum-containing ores, the low extraction rate of mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/34
CPCC22B34/34
Inventor 张永强燕春环卢铁强张帆王萍李攀孙婷婷
Owner YANSHAN UNIV
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