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A kind of 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 problems such as complex process, low separation efficiency, and environmental pollution, and achieve the effects of wide concentration range, non-toxic and harmless environment, and fast extraction rate

Active Publication Date: 2018-07-31
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) 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

A method for extracting and separating molybdenum (VI) in an aqueous solution, which mainly comprises mixing and stirring a nonionic surfactant, a molybdenum-containing aqueous solution, a saline solution and deionized water, and the concentration of the nonionic surfactant is 50 to 300 g / L, The molybdenum concentration is 1-40g / L, the salt concentration is 50-300g / L; adjust the pH value to 1-4, stir it at 25-80°C for 10-60min, then let it stand for phase separation, and phase separation for 10- 60min, the upper phase is a nonionic surfactant phase loaded with molybdenum, and the lower phase is an aqueous two-phase system, wherein the molybdenum concentration in the nonionic surfactant phase loaded with molybdenum is 2 ~ 80g / L; stripping temperature The temperature is 25-80°C, the time is 10-60min, the phase separation is 10-60min, the ratio of the molybdenum-loaded non-ionic surfactant phase to the ammonium sulfate aqueous phase is 1-5, and the stripping product is ammonium molybdate. The invention has fast extraction rate and good phase separation, the molybdenum extraction rate reaches over 95%, and the molybdenum stripping rate reaches over 95%.

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 Patents(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