Purification method for removing organic matter from ammonium rhenate

A purification method, ammonium rhenate technology, applied in rhenium compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of the purity of contaminated products, unstable product quality, and difficulty in removing organic and other impurities, so as to ensure purity, The effect of improving the overall recovery rate

Inactive Publication Date: 2019-07-12
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the purification process of the crude product, a small amount of organic matter is trapped in the crude product. During the purification process, it is difficult to remove organic and other impurities, resulting in unstable product quality
The existing method is to add liquid oxidants such as hydrogen peroxide to oxidize organic impurities to remove organic matter, but liquid oxidants such as hydrogen peroxide will bring other metal impurities such as sodium, potassium and magnesium due to the impurity of the oxidant itself, thereby polluting the purity of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for purifying ammonium rhenate to remove organic matter, comprising the following steps:

[0024] 1) Put the ammonium rhenate product into a container, add 500 ml of water per kilogram of ammonium rhenate product and heat to 82°C for dissolution until completely dissolved;

[0025] 2) Pass ozone into the ammonium rhenate solution with a flow rate of 0.3m 3 / h, stirring for 20 minutes;

[0026] 3) After removing the foam on the surface of the solution, filter at 80 ° C, place the filtered filtrate in a cooling device, cool at 3 ° C for 120 minutes, filter again, take out the crystalline material and dehydrate the crystalline material in a centrifuge, and crystallize The substance is placed in an oven and uniformly dried at 100°C for 80 minutes to obtain an ammonium rhenate product with a purity greater than 99.995%.

Embodiment 2

[0028] A method for purifying ammonium rhenate to remove organic matter, comprising the following steps:

[0029] 1) Put the ammonium rhenate product into a container, add 600 ml of water per kilogram of ammonium rhenate product and heat to 83°C for dissolution until completely dissolved;

[0030] 2) Pass ozone into the ammonium rhenate solution with a flow rate of 0.3m 3 / h, stirring for 20 minutes;

[0031] 3) After removing the foam on the surface of the solution, filter at 83 ° C, place the filtered filtrate in a cooling device, cool at 5 ° C for 120 minutes, filter again, take out the crystalline material and dehydrate the crystalline material in a centrifuge, and crystallize The substance is placed in an oven and uniformly dried at 120°C for 70 minutes to obtain an ammonium rhenate product with a purity greater than 99.995%.

Embodiment 3

[0033] A method for purifying ammonium rhenate to remove organic matter, comprising the following steps:

[0034] 1) Put the ammonium rhenate product into a container, add 800 ml of water per kilogram of ammonium rhenate product and heat to 85°C for dissolution until completely dissolved;

[0035] 2) Pass ozone into the ammonium rhenate solution with a flow rate of 0.3m 3 / h, stirring for 15 minutes;

[0036] 3) After removing the foam on the surface of the solution, filter at 85 ° C, place the filtered filtrate in a cooling device, cool at 1 ° C for 90 minutes, filter again, take out the crystalline material and dehydrate the crystalline material in a centrifuge, crystallize The substance is placed in an oven and uniformly dried at 110°C for 75 minutes to obtain an ammonium rhenate product with a purity greater than 99.995%.

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Abstract

The invention discloses a purification method for removing organic matter from ammonium rhenate, and belongs to the technical field of ammonium rhenate purification in hydrometallurgy. The purification method for removing the organic matter from ammonium rhenate comprises the following steps: (1), putting ammonium rhenate containing organic impurities into a container, adding deionized water and performing heating until ammonium rhenate is completely dissolved; (2), introducing a gas strong oxidant into the ammonium rhenate solution, and performing stirring until organic matter in the solutionis completely oxidized; (3), removing foam on the surface of the solution, performing filtering, placing a filtrate in a cooling device for cooling until ammonium rhenate is completely crystallized,performing filtering again, taking out ammonium rhenate crystalline substances, performing centrifugal dehydration treatment on the ammonium rhenate crystalline substances, and drying dehydrated ammonium rhenate to obtain a high-purity ammonium rhenate product. The purity of the ammonium rhenate product prepared with the method is 99.995% or higher, and the method has the advantages of simple process, high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of ammonium rhenate purification in hydrometallurgy, and relates to a purification method for removing organic matter in ammonium rhenate. Background technique [0002] The industrial purification of ammonium rhenate is to purify ammonium rhenate solution by selecting appropriate methods, and then obtain high-purity ammonium rhenate through crystallization. The main methods are crystallization, ion exchange-crystallization and extraction, and the most widely used in industry is extraction. Law. [0003] Extraction, also known as solvent extraction or liquid-liquid extraction, is a unit operation that uses the different solubility of the components in the system to separate the mixture. That is to use the difference in solubility or partition coefficient of substances in two immiscible (or slightly soluble) solvents to transfer solute substances from one solvent to another. At present, most of ammonium rhen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G47/00
CPCC01G47/00C01P2006/80
Inventor 章德铭周小彬王芦燕李曹兵彭鹰张鑫
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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