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Method for separating tungsten and molybdenum

A technology of tungsten, molybdenum and ionic liquid, which is applied in the field of separating tungsten and molybdenum, can solve the problem of high cost

Active Publication Date: 2021-07-20
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN102876906A discloses a method for extracting and separating tungsten and molybdenum from a mixed solution of tungsten and molybdenum. Adjust the pH value to 3.5, and then add hydrogen peroxide with 1.5 times the molar amount of tungsten and molybdenum, but there is still the problem of high cost

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  • Method for separating tungsten and molybdenum

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Embodiment 1

[0033] The method for separating tungsten and molybdenum of the present embodiment comprises the following steps:

[0034] (1) Pretreatment

[0035] ①Pretreatment of tungsten-molybdenum mixed solution

[0036] The pH of the tungsten-molybdenum mixed solution of this embodiment is 9.5, and the pH is adjusted to 6.0 with sulfuric acid, wherein, the WO in the tungsten-molybdenum mixed solution 3 and the concentration of Mo is: WO 3 is 10g / L, and Mo is 10g / L.

[0037] ② Preparation of organic phase

[0038] Prepare the organic phase containing ether amide ionic liquid, isooctyl alcohol and diluent, wherein, the concentration of each component in the organic phase is: the concentration of ether amide ionic liquid [A336][DODDGA] is 0.2mol / L, isooctyl alcohol The volume percentage content is 5%. The diluent is sulfonated kerosene.

[0039] (2) Extract tungsten from tungsten-molybdenum mixed solution by using organic phase

[0040] The organic phase prepared in step ② and the t...

Embodiment 2

[0046] The method for separating tungsten and molybdenum of the present embodiment comprises the following steps:

[0047] (1) Pretreatment

[0048] ①Pretreatment of tungsten-molybdenum mixed solution

[0049] The pH of the tungsten-molybdenum mixed solution of this embodiment is 9.8, and the pH is adjusted to 7.0 with sulfuric acid, wherein, the WO in the tungsten-molybdenum mixed solution 3 and the concentration of Mo is: WO 3 is 10g / L, and Mo is 20g / L.

[0050] ② Preparation of organic phase

[0051] Prepare an organic phase containing ether amide ionic liquid, isooctyl alcohol and diluent, wherein the concentration of each component in the organic phase is: the concentration of ether amide ionic liquid [P66614][DODDGA] is 0.2mol / L, isooctanol The volume percentage content is 10%. The diluent is sulfonated kerosene.

[0052] (2) Extract tungsten from tungsten-molybdenum mixed solution by using organic phase

[0053] The organic phase prepared in step ② and the tungst...

Embodiment 3

[0059] The method for separating tungsten and molybdenum of the present embodiment comprises the following steps:

[0060] (1) Pretreatment

[0061] ①Pretreatment of tungsten-molybdenum mixed solution

[0062] The pH of the tungsten-molybdenum mixed solution of this embodiment is 9.4, and the pH is adjusted to 7.5 with sulfuric acid, wherein, the WO in the tungsten-molybdenum mixed solution 3 and the concentration of Mo is: WO 3 is 30g / L and Mo is 10g / L.

[0063] ② Preparation of organic phase

[0064] Prepare an organic phase containing ether amide ionic liquid, isooctyl alcohol and diluent, wherein the concentration of each component in the organic phase is: the concentration of ether amide ionic liquid [P66614][DODDGA] is 0.6mol / L, isooctanol The volume percentage content is 15%. The diluent is No. 260 solvent naphtha.

[0065] (2) Extract tungsten from tungsten-molybdenum mixed solution by using organic phase

[0066] The organic phase prepared in step ② and the tun...

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Abstract

The invention relates to a method for separating tungsten and molybdenum, belonging to the technical field of tungsten and molybdenum extraction. The method for separating tungsten and molybdenum provided by the invention comprises the following steps: utilizing [A336] + or [66614] + with [DODDGA] ‑ or [D 2 EHDDGA] ‑ The formed ether amide ionic liquid has the characteristics of high selectivity for tungsten at a pH of 5.5 to 7.5. The above-mentioned organic phase containing ether amide ionic liquid and diluent is used to extract the tungsten and molybdenum mixed solution with a pH of 5.5 to 7.5 Separation, tungsten is extracted into the organic phase, molybdenum remains in the raffinate, and the separation of tungsten and molybdenum is realized. The method has simple process, is easy to implement, has good separation effect of tungsten and molybdenum, and is suitable for deep separation of tungsten and molybdenum in a macro-volume tungsten and molybdenum solution.

Description

technical field [0001] The invention relates to a method for separating tungsten and molybdenum, belonging to the technical field of tungsten and molybdenum extraction. Background technique [0002] Tungsten and molybdenum are important strategic minerals in my country. Tungsten, molybdenum and tungsten-molybdenum alloys are widely used in electronic power equipment manufacturing, metal material processing, High-temperature furnace structural components manufacturing, aerospace and defense industries and other fields. my country is rich in tungsten and molybdenum resources, but with the exhaustion of high-quality tungsten and molybdenum mineral resources, the development and utilization of complex tungsten and molybdenum symbiotic resources has attracted people's attention. For example, more than 70% of my country's tungsten ore resources are scheelite resources that are difficult to use, with low grade and high content of associated element molybdenum. [0003] Tungsten an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/34C22B34/36C22B3/32C22B3/38
CPCC22B34/34C22B34/36C22B3/32C22B3/38Y02P10/20
Inventor 王威曹飞柳林刘红召张博曹耀华王洪亮赵恒勤
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD