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Method for producing ammonium perrhenate from rhenium-enriched residues

A technology of ammonium perrhenate and rhenium-rich slag, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry, etc., can solve the problems of difficulty in removing impurities by alkali leaching, high production cost, and high safety requirements, and achieve equipment and raw material input. Low cost, high recovery efficiency, no environmental pollution effect

Active Publication Date: 2017-01-11
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pressurized oxygen leaching equipment requires a large investment, high safety requirements, and high production costs; alkaline leaching has certain difficulties in subsequent impurity removal, and the use of anion exchange resins to purify rhenium has a high loss rate, and extraction brings problems in the treatment of the extract phase; roasting Leaching has high environmental pollution and large investment

Method used

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  • Method for producing ammonium perrhenate from rhenium-enriched residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] according to figure 1 The production process shown is carried out.

[0050] 1.1 Decopper operation

[0051] The composition of waste acid is shown in Table 1. Heat the spent acid to 65°C, add sodium thiosulfate according to the mass ratio of the precipitant to the copper contained in the spent acid 7.3:1, and react for 30 minutes to obtain a copper removal solution. The composition of the copper removal solution is shown in Table 2.

[0052] Table 1 waste acid composition (g / L)

[0053] Cu Fe As Re Mo Se 0.35 0.30 0.98 0.0077 0.012 0.027

[0054] Composition (g / L) of table 2 decopper solution

[0055] Cu Fe As Re Mo Se 0.0096 0.28 0.96 0.0071 0.010 0.0034

[0056] It can be seen from Table 1 and Table 2 that the copper removal rate in the copper removal solution is 97.26%, and the rhenium loss rate is 7.79%.

[0057] 1.2 Shen rhenium operation

[0058] Heat the decopper solution to 70°C, add sodium...

Embodiment 2

[0078] 2.1 Decopper operation

[0079] The composition of spent acid is shown in Table 7. Heat the spent acid to 65°C, add sodium thiosulfate according to the mass ratio of the precipitant to the copper in the spent acid 8.5:1, and react for 35 minutes to obtain a decopper solution. The composition is shown in Table 8.

[0080] Table 7 waste acid composition (g / L)

[0081] Cu Fe As Re Mo Se 0.9 0.68 1.04 0.018 0.016 0.0078

[0082] Table 8 Decopper solution composition (g / L)

[0083] Cu Fe As Re Mo Se 0.044 0.66 1.03 0.013 0.017 <0.00050

[0084] It can be seen from Table 7 and Table 8 that the copper removal rate in the liquid after decopper removal is 95.11%, and the rhenium loss rate is 27.54%.

[0085] 2.2 Shen rhenium operation

[0086] Heat the decopper solution to 72°C, add sodium thiosulfate according to the ratio of the mass (g) of the precipitating agent to the volume (L) of the waste acid (L) 3...

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Abstract

The invention provides a method for producing ammonium perrhenate from rhenium-enriched residues. The method comprises the following steps: S1) mixing the rhenium-enriched residues and an oxidant solution for oxidizing leaching to obtain an oxidizing leaching solution; S2) adding an alkali compound into the oxidizing leaching solution to remove impurities so as to obtain an impurity removal solution; and S3) allowing the impurity removal solution to pass through a cation exchange resin to obtain the ammonium perrhenate. Compared with the prior art, the method disclosed by the invention has the advantages that the rhenium-enriched residues are subjected to oxidizing leaching and impurity removal by virtue of the alkali compound and adsorbed to further remove the impurities by virtue of the cation exchange resin, and then ammonium perrhenate can be obtained. The process flow is short, the treatment quantity is great, the equipment and raw material input is cheap, and the method can be operated at normal pressure. Moreover, the whole process is an all wet process metallurgy method, the problem of environmental pollution is solved, and the recovery efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of rare and precious metal recovery, and in particular relates to a method for producing ammonium perrhenate from rhenium-rich slag. Background technique [0002] Rhenium is a scattered metal with high melting point and stable properties, which can be used in petroleum catalysts, high-temperature superalloys, etc. Metal rhenium and its alloys can be used to make tap water pen tips and high-temperature thermocouples, and can also be used as catalysts in alcohol dehydrogenation, synthetic ammonia, and sulfur trioxide from sulfur dioxide. At the same time, alloys containing 90% tungsten, 1% vanadium, and 9% rhenium are also High temperature resistant. However, no ore with high rhenium content has been found so far, and rhenium exists as an associated metal in chalcocite and molybdenite. [0003] At present, the recovery methods of rhenium mainly include extraction method, ion exchange method and chemical prec...

Claims

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Application Information

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IPC IPC(8): C01G47/00
CPCC01G47/00C01P2006/80
Inventor 丁成芳陈一恒余华清
Owner YANGGU XIANGGUANG COPPER
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