Production process of 5N-grade high-purity molybdenum trioxide

A molybdenum trioxide and production process technology, applied in the field of 5N grade high-purity molybdenum trioxide production process, can solve the problems of non-purity high-purity molybdenum trioxide products and production processes, and achieve prevention and control of equipment and environmental pollution, process parameters Precisely Controlled Effects

Active Publication Date: 2021-05-04
成都虹波钼业有限责任公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Therefore, there is currently no high-purity molybdenum trioxide product and production process with a purity of 5N in China

Method used

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  • Production process of 5N-grade high-purity molybdenum trioxide
  • Production process of 5N-grade high-purity molybdenum trioxide

Examples

Experimental program
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Embodiment 1

[0029] The thick sodium molybdate solution in the present embodiment is that the molybdenum-containing waste catalyst reclaims through Na 2 CO 3 The sodium molybdate solution obtained by leaching has pH: 6-6.5, molybdenum concentration: 58.32g / l, tungsten concentration: 1.28g / l, vanadium concentration: 2.53g / l.

[0030] refer to figure 1 , the flow process of the present embodiment 5N level high-purity molybdenum trioxide production process mainly comprises:

[0031] 1. Multi-stage ion exchange deep impurity removal

[0032] (1) Separation of molybdenum and tungsten vanadium

[0033] NaOH is used to adjust the pH value of the crude sodium molybdate solution to 7.5, and it is adsorbed by D301 macroporous anion exchange resin at a linear velocity of 0.5m / h. During the adsorption process, both tungsten and vanadium are adsorbed on the resin in the form of anions. The solution out of the column is mainly sodium molybdate. When tungsten appears in the column solution and the tu...

Embodiment 2

[0044] The thick sodium molybdate solution in this embodiment is the sodium molybdate solution after the molybdic acid prepared by waste molybdenum alloy is dissolved in NaOH and deaminated. The pH of the solution is 10~11. l, vanadium concentration: 0.05g / l.

[0045] refer to figure 1 , the flow process of the present embodiment 5N level high-purity molybdenum trioxide production process mainly comprises:

[0046] 1. Multi-stage ion exchange deep impurity removal

[0047] (1) Separation of molybdenum and tungsten vanadium

[0048] HCl is used to adjust the pH of the crude sodium molybdate solution to 8.0, and it is adsorbed by D314 macroporous anion exchange resin at a linear speed of 2.0 m / h. During the adsorption process, both tungsten and vanadium are adsorbed on the resin in the form of anions. The solution out of the column is mainly sodium molybdate. When tungsten appears in the column solution and the tungsten concentration reaches 10 mg / l, the adsorption stops. At ...

Embodiment 3

[0059] The crude sodium molybdate solution in this example is a low-grade molybdenum calcine NaOH leaching solution, the solution pH is 8-8.5, the molybdenum concentration is 54.2g / l, the tungsten concentration is 0.28g / l, and the vanadium concentration is 0.08g / l.

[0060] refer to figure 1 , the flow process of the present embodiment 5N level high-purity molybdenum trioxide production process mainly comprises:

[0061] 1. Multi-stage ion exchange deep impurity removal

[0062] (1) Separation of molybdenum and tungsten vanadium

[0063] The crude sodium molybdate solution is adsorbed by D231 macroporous anion exchange resin, and the adsorption linear velocity is 3.0m / h. During the adsorption process, both tungsten and vanadium are adsorbed on the resin in the form of anions. The solution out of the column is mainly sodium molybdate. When tungsten appears in the column solution and the tungsten concentration reaches 10 mg / l, the adsorption stops. At this time, the vanadium i...

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Abstract

The invention provides a production process of 5N-grade high-purity molybdenum trioxide. The production process comprises the following steps: by taking crude sodium molybdate containing impurity elements such as tungsten, vanadium and the like as a raw material, deeply separating molybdenum from metal impurities and deeply separating molybdenum from non-metal impurities through multi-stage ion exchange, transforming the obtained high-purity sodium molybdate solution to obtain a high-purity ammonium molybdate solution, after the high-purity ammonium molybdate solution is subjected to acid precipitation to form a solid product, finally obtaining the 5N-grade high-purity molybdenum trioxide with the total impurity content smaller than or equal to 10 ppm through full-process closed conveying and operation. The technological parameters in the production process are precisely controlled, and equipment and environment pollution is strictly prevented and controlled.

Description

technical field [0001] The invention belongs to the technical field of molybdenum trioxide production and relates to a 5N grade high-purity molybdenum trioxide production process. Background technique [0002] The production methods of ammonium molybdate mainly include pickling and acid precipitation-evaporative crystallization method, water washing-evaporation crystallization method and high-temperature oxygen pressure cooking. Foreign countries often use extraction and ion exchange methods for purification. For example, Chile Molymet uses sulfuric acid pickling, ion exchange After removal of impurities, ADM is produced by continuous crystallization. German H.C.Starck uses extraction method to produce ADM, and American Climax uses high-temperature oxygen pressure cooking method to produce ADM for low-grade raw materials. ADM. In China, industrial molybdenum oxide produced by roasting high-quality molybdenum concentrate is used as raw material, and ammonium molybdate is pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02
CPCC01G39/003C01G39/02C01P2006/80
Inventor 杨伟刘锦锐任倩高志强易建刘阳郑枝木
Owner 成都虹波钼业有限责任公司
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