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Method for extracting and separating tungsten molybdenum

A technology for separation and extraction of ammonium tungstate, applied in the field of tungsten products and separation of molybdenum in ammonium tungstate solution, can solve the problem of high cost and achieve the effect of reducing cost

Active Publication Date: 2014-10-29
XIAMEN TUNGSTEN
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Problems solved by technology

For this system, the method is not only costly, but also brings new impurity removal issues

Method used

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  • Method for extracting and separating tungsten molybdenum

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Embodiment Construction

[0019] The component of the ammonium tungstate solution to be separated is WO 3 Mo: 235-285g / l, Mo: 20-30g / l.

[0020] The main instruments are separatory funnel and Kang's oscillator, and the extraction ratio is O / A=1:1.

[0021] The composition of the organic phase extracted and separated in the present invention is 20% N263, 20% isooctyl alcohol and 60% kerosene, O / A=1:1.

[0022] Vulcanization of the organic phase: the organic phase and the vulcanizing agent are mixed and fully contacted, and then the phases are separated to obtain a vulcanized organic phase.

[0023] Re-extraction to remove molybdenum: mix high-molybdenum ammonium tungstate into the sulfided organic phase for treatment, and only need to go through two or more extractions and separations to obtain a qualified low-molybdenum ammonium tungstate solution.

[0024] The negative molybdenum organic phase after extraction can be oxidized with sodium hypochlorite and back-extracted molybdenum to obtain sodium mo...

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Abstract

The invention discloses a method for extracting and separating tungsten molybdenum. N263-sec-octyl alcohol-kerosene system is used for extracting and separating ammonium tungstate solutions, an organic phase is composed of 20 percent of N263, 20 percent of isooctyl alcohol and 60 percent of kerosene, and O / A is 1:1. According to the method, firstly, the organic phase is vulcanized, the organic phase and vulcanizing agents are mixed and are in sufficient contact for standing so as to achieve phase splitting, and the vulcanized organic phase is obtained; molybdenum is extracted and removed, high-molybdenum ammonium tungstate is doped into the vulcanized organic phase for treatment, and through extraction and separation of more than two levels, a qualified low-molybdenum ammonium tungstate solution is obtained. According to the method, the organic phase configuration process, the sulfidation process and the reverse extraction process are carried out, the technology is innovated and improved, the problems that in the traditional ammonium tungstate extraction and molybdenum removing process, the efficiency is low, and the cost is high are solved, and the method becomes possible in the industrial application aspect.

Description

technical field [0001] The invention relates to a method for extracting and separating tungsten and molybdenum, especially suitable for separating molybdenum in an ammonium tungstate solution, and the solution after molybdenum removal can meet the requirements of producing tungsten products whose molybdenum content meets the requirements of the national first-class product index. Background technique [0002] The separation of tungsten and molybdenum has always been the focus of research and development of tungsten and molybdenum smelting process. Selective precipitation method, ion exchange method for removing molybdenum, molybdenum trisulfide precipitation method, hydrogen peroxide complex system extraction and separation of tungsten and molybdenum, etc. have their own characteristics, and they all have high separation effect of tungsten and molybdenum under the appropriate environment. However, these processes all have their applicable conditions and pH ranges. For ammoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/40C22B34/34C22B34/36
CPCY02P10/20
Inventor 黄建华方奇王海军陈杰
Owner XIAMEN TUNGSTEN
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