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Method for extracting and separating molybdenum in aqueous solution through two- aqueous-phase system

A two-phase system and aqueous solution technology, applied in the field of materials, can solve the problems of low separation efficiency, complicated process, polluted environment, etc., and achieve the effects of high extraction efficiency, mild operating conditions and fast extraction rate

Active Publication Date: 2018-05-25
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the main disadvantages of current molybdenum separation technology are: low separation efficiency, complicated process, environmental pollution, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Mix and stir nonionic surfactant PEG1000, molybdenum (VI) aqueous solution (sodium molybdate solution), sodium sulfate aqueous solution and deionized water to obtain mixed solution 1, and nonionic surfactant PEG1000 in mixed solution 1 The mass fraction is 10%, the mass fraction of molybdenum (VI) is 0.1%, the mass fraction of sodium sulfate is 10%, and the pH value of the mixed solution 1 is adjusted to 2 with sulfuric acid to obtain the mixed solution 2;

[0019] (2) Put the mixed solution 2 of step (1) into a constant temperature magnetic stirrer to stir, set the temperature to 30°C, and stir for 60 minutes. After stirring, place it in a constant temperature water bath at 30°C for phase separation. The phase separation time is 20min, and the upper phase is a nonionic surfactant phase loaded with molybdenum (VI), and the lower phase is an aqueous two-phase system;

[0020] (3) the nonionic surfactant phase solution of loading platinum (VI) in step (2) is mixed wit...

Embodiment 2

[0023] (1) Mix and stir nonionic surfactant PEG2000, molybdenum (VI) aqueous solution (sodium molybdate solution), lithium sulfate aqueous solution and deionized water to obtain mixed solution 1, and nonionic surfactant PEG2000 in mixed solution 1 The mass fraction is 15%, the mass fraction of molybdenum (VI) is 1.0%, and the mass fraction of lithium sulfate is 8%, and the pH value of the mixed solution 1 is adjusted to 2 with hydrochloric acid to obtain the mixed solution 2;

[0024] (2) Put the mixed solution 2 of step (1) 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 at 40°C for phase separation. The phase separation time is 40min, and the upper phase is a nonionic surfactant phase loaded with molybdenum (VI), and the lower phase is an aqueous two-phase system;

[0025] (3) the nonionic surfactant phase solution of loading platinum (VI) in step (2) is ...

Embodiment 3

[0028] (1) Mix and stir nonionic surfactant PEG4000, molybdenum (VI) aqueous solution (sodium molybdate solution), ammonium sulfate aqueous solution and deionized water to obtain mixed solution 1, and nonionic surfactant PEG4000 in mixed solution 1 The mass fraction is 20%, the molybdenum (VI) mass fraction is 1.55%, the ammonium sulfate mass fraction is 12%, and the pH value of the mixed solution 1 is adjusted to 2 with nitric acid to obtain the mixed solution 2;

[0029] (2) Put the mixed solution 2 of step (1) into a constant temperature magnetic stirrer to stir, set the temperature to 50°C, and stir for 10 minutes. After stirring, place it in a constant temperature water bath at 50°C for phase separation. The phase separation time is 60min, and the upper phase is a nonionic surfactant phase loaded with molybdenum (VI), and the lower phase is an aqueous two-phase system;

[0030] (3) the nonionic surfactant phase solution of loading platinum (VI) in step (2) is mixed with a...

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PUM

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Abstract

The invention relates to a method for extracting and separating molybdenum in an aqueous solution through a two-aqueous-phase system. The method mainly comprises the steps that a non-ionic surface active agent, a molybdenum containing aqueous solution, a saline solution and deionized water are mixed and stirred evenly, the mass fraction of the non-ionic surface active agent is 10%-20%, the mass fraction of the molybdenum (VI) is 0.1%-3%, and the mass fraction of salt is 8%-12%; the pH value is adjusted to be 1-7, after stirring is carried out for 10 min-60 min at 30 DEG C-60 DEG C, standing phase splitting is carried out, phase separation is carried out for 10 min-60 min, a non-ionic surface active agent phase with loaded molybdenum (VI) as an upper phase is obtained, and the two-aqueous-phase system with a water phase as a lower phase is obtained; the reextraction temperature is 40 DEG C-70 DEG C, the time is 20 min-60 min, phase separation is carried out for 20 min-60 min, the phaseratio of the non-ionic surface active agent phase with the loaded molybdenum (VI) to an ammonium carbonate aqueous solution phase is (1-4):1, and a reextraction product is ammonium molybdate. The method is high in extracting speed and good in phase separation, the single-stage extraction rate of the molybdenum (VI) reaches 94% or above, and the single-stage reextraction rate of the molybdenum (VI)reaches 95% or above.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for extracting and separating molybdenum in an aqueous solution. Background technique [0002] Molybdenum and its alloys are important strategic materials, and are widely used in various fields such as national defense and military industry, machining, and electronics industry because of their excellent physical and chemical properties. The reserves of rare metal molybdenum in the earth's crust are very small, accounting for only 0.001%. my country has many large and medium-sized molybdenum mines, and its molybdenum reserves rank second in the world. [0003] With the rapid development of science and technology, more stringent requirements are put forward for various materials, and various materials with different properties are constantly being developed. With its unique properties, molybdenum is believed to be used more and more widely. New functions will also be co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B34/34
CPCC22B34/34C22B3/262Y02P10/20
Inventor 张永强王萍张帆李攀孙婷婷潘雅静
Owner YANSHAN UNIV
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