Method for extracting and separating molybdenum (VI) in aqueous solution

An aqueous solution and brine solution technology, applied in the field of materials, can solve the problems of polluted environment, complex process, low separation efficiency, etc., and achieve the effects of fast extraction rate, wide concentration range, and non-toxic and harmless environment.

Active Publication Date: 2017-04-26
YANSHAN UNIV
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  • 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) nonionic surfactant EO50PO50, molybdenum (VI) aqueous solution, magnesium sulfate aqueous solution and deionized water are mixed and stirred evenly to obtain mixed solution 1, and nonionic surfactant EO50PO50 concentration is 50g / L in mixed solution 1, Molybdenum (VI) concentration is 1g / L, magnesium sulfate concentration is 50g / L;

[0022] (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;

[0023] (3) Put the mixed solution 2 of step (2) into a constant temperature magnetic stirrer to stir, set the temperature to 60°C, and stir for 60 minutes. After stirring, place it in a constant temperature water bath for phase separation and phase separation The time is 10min, and the upper phase is a nonionic surfactant phase loaded with molybdenum (VI), and the lower phase is a two-phase aqueous system of an aqueous phase, wherein molybdenum (VI) in the nonionic surfactant phase of loaded molybdenum (VI) Th...

Embodiment 2

[0027] (1) Mix and stir nonionic surfactant L35, molybdenum (VI) aqueous solution, lithium sulfate aqueous solution and deionized water to obtain mixed solution 1. In mixed solution 1, the concentration of nonionic surfactant L35 is 200g / L , molybdenum (VI) concentration is 5g / L, lithium sulfate concentration is 100g / L;

[0028] (2) Sulfuric acid is used to adjust the pH value of step (1) mixed solution 1 to 3 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 40°C, and stir for 20 minutes. After stirring, place it in a constant temperature water bath for phase separation and phase separation The time is 60min, and the upper phase is a nonionic surfactant phase loaded with molybdenum (VI), and the lower phase is a two-phase system of water phase, wherein the molybdenum (VI) in the nonionic surfactant phase of loaded molybdenum (VI) The concentration is 10g / L;

[0030] (4) ...

Embodiment 3

[0033] (1) Mix and stir nonionic surfactant RPE2520, molybdenum (VI) aqueous solution, sodium chloride aqueous solution and deionized water to obtain mixed solution 1. In mixed solution 1, the concentration of nonionic surfactant RPE2520 is 150g / L, molybdenum (VI) concentration is 10g / L, and sodium chloride concentration is 150g / L;

[0034] (2) Using hydrochloric acid to adjust the pH value of step (1) mixed solution 1 to be 2 to obtain mixed solution 2;

[0035] (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 30 minutes. After stirring, place it in a constant temperature water bath for phase separation and phase separation The time is 50min, and the upper phase obtained is a nonionic surfactant phase loaded with molybdenum (VI), and the lower phase is a two-phase system of an aqueous phase, wherein molybdenum (VI) in the nonionic surfactant phase loaded with molybdenum (VI) The concentr...

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Abstract

The invention discloses a method for extracting and separating molybdenum (VI) in an aqueous solution. The method is mainly characterized in that a non-ionic surface active agent, the molybdenum-containing aqueous solution, a saline solution and deionized water are mixed and stirred evenly, the concentration of the non-ionic surface active agent is 50-300 g/L, the concentration of molybdenum is 1-40 g/L, and the salt concentration is 50-300 g/L; the pH value is adjusted to 1-4, the mixture is subjected to still standing and phase separation after being stirred for 10-60 min at 25-80 DEG C, phase separation is conducted for 10-60 min, an aqueous two-phase system with the upper phase being a non-ionic surface active agent phase loading the molybdenum and the lower phase being an aqueous phase, and the concentration of the molybdenum in the non-ionic surface active agent phase loading the molybdenum is 2-80 g/L; the reextraction temperature is 25-80 DEG C, the time is 10-60 min, phase separation is conducted for 10-60 min, the phase ratio of the non-ionic surface active agent phase loading the molybdenum to an ammonium sulfate aqueous solution is 1 to 5, and the reextraction product is ammonium molybdate. According to the method, the extraction rate is high, good phase separation is achieved, the molybdenum extraction rate reaches 95% or above, and the molybdenum reextraction rate reaches 95% or above.

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): C22B34/34C22B3/26
CPCC22B3/302Y02P10/20
Inventor 张永强燕春环卢铁强张帆李攀孙婷婷王萍
Owner YANSHAN UNIV
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