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Saponifying agent for organic rare-earth extraction agents and application method of saponifying agent

A rare earth organic and application method technology, applied in the direction of improving process efficiency, can solve the problems of unfavorable large-scale production, high production cost, large amount of ammonia nitrogen, etc., achieve high quality, reduce consumption, and save production cost.

Active Publication Date: 2017-07-04
四川省冕宁县方兴稀土有限公司
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  • Claims
  • Application Information

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Problems solved by technology

As mentioned in the background technology of Chinese patent application CN101602519A, the extraction methods in the prior art are mainly divided into saponified organic extractant for extraction, or use non-saponified special organic extractant, wherein the method of using saponified organic extractant is mainly Use saponification agent ammonia, ammonium bicarbonate, etc. to saponify the organic extractant and then add raw materials for extraction. This method will produce a large amount of ammonia nitrogen wastewater and cause environmental pollution; if non-saponifiable organic extractant is used, the production cost is high, which is not conducive to large-scale production. mass production

Method used

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  • Saponifying agent for organic rare-earth extraction agents and application method of saponifying agent

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Effect test

Embodiment 1

[0031] (1) Add 6m³ of sodium carbonate aqueous solution with a molar concentration of 2mol / L in the first stirring tank, and then filter, add 4m³ of sodium hydroxide with a molar concentration of 4mol / L in the second stirring tank, let it stand, and filter The final sodium carbonate solution is poured into the second stirring tank, mixed with the sodium hydroxide solution prepared in advance, and the saponification agent is obtained after stirring evenly, which is put into the high-level tank for standby; in addition, the organic phase sulfonated kerosene and organic extractant P507 ;

[0032] (2) Add the saponification agent, organic phase, organic extractant and mixed rare earth chloride mixture liquid into the saponification tank, and under the condition of slow stirring, control the flow rate of the organic phase to 28~32L / min, The degree of saponification of the organic extractant is 0.2-0.24 N / L, the flow rate of the saponification agent is 1.54-1.76 L / min, the flow rate...

Embodiment 2

[0036](1) Add 6m³ of sodium carbonate aqueous solution with a molar concentration of 2mol / L in the first stirring tank, and then filter, add 4m³ of sodium hydroxide with a molar concentration of 4mol / L in the second stirring tank, let it stand, and filter The final sodium carbonate solution is poured into the second stirring tank, mixed with the sodium hydroxide solution prepared in advance, and the saponification agent is obtained after stirring evenly, which is put into the high-level tank for standby; in addition, the organic phase sulfonated kerosene and organic extractant P507 ;

[0037] (2) Add the saponification agent, organic phase, organic extractant and mixed rare earth chloride mixture liquid into the saponification tank, and under the condition of slow stirring, control the flow rate of the organic phase to 28~32L / min, The degree of saponification of the organic extractant is 0.2-0.24 N / L, the flow rate of the saponification agent is 1.54-1.76 L / min, the flow rate ...

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Abstract

The invention discloses a saponifying agent for organic rare-earth extraction agents and an application method of the saponifying agent. The saponifying agent is prepared from sodium hydroxide and sodium carbonate and can be applied to saponifying of organic rare-earth extraction agents such as P507 and the like. According to the saponifying agent and the application method, no ammonia-nitrogen sewage is produced, the production cost is low, the operation is convenient, the extraction efficiency is high, no third phase is formed in the extraction process, and the obtained product has the high purity.

Description

technical field [0001] The invention relates to the technical field of rare earth organic extraction, in particular to the technical field of the rare earth organic extraction method comprising the step of saponification of an organic extractant. Background technique [0002] In the process of rare earth production, in most cases, different rare earth elements exist in the form of a mixture, and only when they need to be separated in the end, they are extracted separately through different processing methods. [0003] At present, the most mature technology and the most widely used rare earth separation method is the organic extraction method, that is, the different rare earth elements in the rare earth mixture are separated by organic extractants. In the process of organic extraction, the organic phase composed of the organic extractant and the rare earth mixture will continue to undergo ion exchange, resulting in a continuous decline in the extraction capacity of the extrac...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B59/00
CPCC22B59/00C22B3/3844Y02P10/20
Inventor 廖亮蔡蔚
Owner 四川省冕宁县方兴稀土有限公司
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