Process method for extracting and separating rear earth without saponification

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...

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