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Process method for extracting and separating rear earth without saponification

A process method, a saponification-free technology, applied in the direction of improving process efficiency, etc., can solve problems such as environmental pollution, high cost, and difficult treatment, and achieve the effects of reducing production costs, avoiding the generation of NH4+-containing wastewater, and avoiding a large amount of consumption

Inactive Publication Date: 2010-05-19
全南县新资源稀土有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the rare earth industry, problems such as high cost caused by raw and auxiliary materials and environmental pollution caused by waste water discharge have been bothering and restricting the development of the industry.
Ammonia nitrogen in production wastewater must meet discharge standards, which requires large investment in environmental protection, difficult treatment, and high cost

Method used

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  • Process method for extracting and separating rear earth without saponification
  • Process method for extracting and separating rear earth without saponification
  • Process method for extracting and separating rear earth without saponification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use P507 extractant to separate impurities such as Ca and Mg in the yttrium chloride feed liquid, extract and separate 99.999% yttrium chloride, and the extraction tank is a production example of 650L.

[0028] According to the method of the present invention, the dilution with water replaces the saponification of ammonia water in the extraction process.

[0029] Set the hydrochloric acid concentration value C in the raffinate 9 h Less than 0.65N.

[0030] The flow rate and concentration of the objects entering the tank are as follows:

[0031] P507: Flow V S =150L / min, concentration C s =1.3-1.5M;

[0032] YCl 3 Feed liquid: flow V f =40.9L / min, concentration C f =0.4M;

[0033] Lotion: flow rate V W =1.1L / min, concentration C W = 1.5M;

[0034] Water: flow V 水 =41L / min;

[0035] Acid reflux: Flow V 反 =14L / min, concentration C 反 = 4.5M.

[0036] The flow rate and concentration of the objects out of the tank are as follows:

[0037] Raffinate: Flow V 余...

Embodiment 2

[0043] Use P204 to fully remove the rare earth in the rare earth sulfuric acid feed solution, and use HCl back extraction to convert it into high-concentration rare earth chloride. The extraction tank is a production example of 800L.

[0044] Set the concentration value C in the raffinate 9 h Less than 0.3N.

[0045] The flow rate and concentration of the feed objects are as follows:

[0046] P204: Flow V S =150L / min, concentration C s =1.2-1.5M;

[0047] RE 2 (SO 4 ) 3 Feed liquid: flow V f =81.8L / min, concentration C f =0.2M;

[0048] Lotion: flow rate V W =1.1L / min, concentration C W = 1.5M;

[0049] Water: flow V 水 =97.1L / min;

[0050] Acid reflux: Flow V 反 =14L / min, concentration C 反 = 4.5M.

[0051] The flow rate and concentration of the objects out of the tank are as follows:

[0052] Raffinate: Flow V 余 =180L / min, acidity nearly 0.3M;

[0053] Product RECl 3 Feed liquid: flow V 产 =11.6L / min, concentration C 产 = 1.4M;

[0054] Back extraction blank...

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Abstract

The invention relates to a process method for extracting and separating rear earth without saponification, which is characterized by adding water to dilute the acidity of an extraction reaction solution in extraction technological process. Compared with a conventional process, the method uses the dilution with water to replace the saponification with alkali substances in the extraction technological process. The method avoids the large consumption of the alkali substances and reduces the production cost. Particularly, the method avoids the generation of a great deal of waste water containing NH4+, and achieves cleanness, environmental protection and recycling utilization from sources.

Description

Technical field [0001] The invention relates to a process method for extracting and separating rare earths, in particular to a process method for extracting and separating rare earths without saponification. Background technique [0002] In recent years, rare earth materials have developed rapidly in the application field, which intensifies the demand of the rare earth market. However, with the continuous development of science and technology, some traditional application fields of rare earth will be challenged, and some rare earth products have been or will be replaced by other materials. Therefore, the market has higher and higher requirements for the quality and cost of rare earth products. For the rare earth industry, problems such as high cost caused by raw and auxiliary materials and environmental pollution caused by waste water discharge have been bothering and restricting the development of the industry. For enterprises that produce rare earth compounds by extractio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/26
CPCY02P10/20
Inventor 黄建荣
Owner 全南县新资源稀土有限责任公司
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