Mixed extraction agent used for separating yttrium

Abstract

The invention discloses a mixed extraction agent used for separating yttrium. The mixed extraction agent comprises, by volume percent, 10-60% of naphthenic acid, 10-50% of basic extraction agents, 5-40% of alcohols and 10-60% of diluent. The mixed extraction agent is not high in requirement for the acid value of the naphthenic acid; when the mixed extraction agent is used for separating yttrium, the mixed extraction agent containing the naphthenic acid does not need to be subjected to saponification treatment, the content of yttrium in rare earth liquid is not required, the naphthenic acid isnot dissolved in a water phase in the extraction process to achieve no loss, and compared with a naphthenic acid saponification system, the concentration of extracted acid can be effectively reduced.

Description

[0001] This application is a divisional application of "a mixed extraction agent for separating yttrium and a method for extracting and separating yttrium from rare earth feed liquid". The filing date of the original application is: December 24, 2015, and the application number is: 201510982402.0. Invention The name is: a mixed extractant for separating yttrium and a method for extracting and separating yttrium from rare earth feed liquid. technical field [0002] The invention relates to the separation technology of yttrium, in particular to a mixed extraction agent for separating yttrium and a method for extracting and separating yttrium from a rare earth feed liquid. Background technique [0003] Yttrium (Y) is an important rare earth element, which is widely used in aerospace, luminescent materials, nuclear energy and metallurgical industries, and these fields have high requirements for the purity of yttrium. Yttrium mainly exists in rare earth ores, and extracting yttri...

AI Technical Summary

Problems solved by technology

Since the composition of naphthenic acid raw materials provided by different manufacturers is not the same, when naphthenic acid is used as an extraction agent for yttrium, it is necessary to frequently adjust the process conditions for the refining of naphthenic acid raw materials and the process conditions for yttrium extraction, which makes the production operation become difficult. cumbersome

[0006] Naphthenic acid has a certain solubility in water. In the prior art, after extracting yttrium with naphthenic acid, a part of naphthenic acid always enters the water phase, which not only causes a great waste of the organic phase, but also requires removal of the raffinate. The next process or discharge can only be carried out after removing the organic phase. At the same time, the production process needs to continuously replenish fresh naphthenic acid, which also increases the production cost.

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