Selective extracting method of rare earth cerium in bastnaesite

Abstract

The invention discloses a selective extracting method of rare earth cerium in bastnaesite. According to the method, a coprecipitation method is adopted to prepare superparamagnetic ferroferric oxide nanoparticles, superparamagnetic ferroferric oxide serves as the core, hydrolysis is adopted to enable the surface of ferroferric oxide to be coated with a layer of or multiple layers of silicon dioxide shells, on the basis of the coupled reaction principle, the core coated with the coupled reaction is modified, 3-amidogen propyl trimethoxy silane serves as a modification reagent, the core shell structure is modified, and is connected with amidogen, finally, chloromethyl thiirane is used for synthesis through the nucleophilic substitution to form chelate containing nitrogen and sulfur at the same time, then, selective extraction of rare earth cerium in bastnaesite is carried out, at the normal temperature, Ce2+ is absorbed selectively, through the method, the defect that during previous solvent extraction, a solvent in solvent extraction is commonly an organic solvent, most of organic solvents are poisonous, and secondary pollution is easily caused is overcome, and the beneficial effects of being easy to recycle and free of pollution are achieved.

Description

technical field [0001] The invention relates to a selective extraction method of rare earth cerium in bastnaesite, belonging to the field of rare earth extraction. Background technique [0002] There is a large amount of cerium in bastnaesite. The existence of these cerium compounds will not only cause environmental pollution and threaten human health, but also cause a large amount of cerium rare earth metal loss. Because there are many impurities in bastnaesite, it is difficult to remove them by general methods. At present, the extraction method is the main means of extracting cerium in bastnaesite in industry. Its principle is mainly to use an extraction agent to extract cerium in bastnaesite, and then discharge the remaining solution into nature, but the process is carried out. It is easy to cause secondary pollution, especially the potential pollution of organic extractants. Contents of the invention [0003] The object of the present invention is to provide a select...

AI Technical Summary

Problems solved by technology

[0002] There is a large amount of cerium in bastnaesite. The existence of these cerium compounds will not only cause environmental pollution and threaten human health, but also cause a large amount of cerium rare earth metal loss.

Because there are many impurities in bastnaesite, it is difficult to remove them by general methods

At present, the extraction method is the main means of extracting cerium in bastnaesite in industry. Its principle is mainly to use an extraction agent to extract cerium in bastnaesite, and then discharge the remaining solution into nature, but the process is carried out. It is easy to cause secondary pollution, especially the potential pollution of organic extractants