Preparation method of anhydrous rare earth chloride

Abstract

The invention provides a preparation method of anhydrous rare earth chloride (REC13). The method comprises the steps of S1, dissolving a rare earth oxide with hydrochloric acid to form a rare earth chloride solution; S2, adding ammonium chloride into the dissolved rare earth chloride solution; S3, parching the mixture until the mixture is thoroughly dried under a heating condition to obtain a solid mixture of the rare earth chloride containing crystal water and the ammonium chloride; S4, transferring the parched solid mixture into a sublimation device, raising the temperature from 80 DEG C to390 DEG C in a gradient heating mode, and simultaneously carrying out vacuuming heating operation, wherein in the vacuuming heating process, the crystal water of the ammonium chloride and the rare earth chloride are sequentially removed, so that the high-purity anhydrous rare earth chloride is obtained. The method has the advantages that the production process is simple and safe, no side reactionhappens, the purity of the prepared anhydrous rare earth chloride is high, and large-scale production is facilitated.

Description

Technical field [0001] The invention belongs to the technical field of rare earth material preparation, and particularly relates to a method for preparing anhydrous rare earth chloride by using rare earth oxides as raw materials. [0002] technical background [0003] Rare earth elements account for about one-seventh of the elements in the periodic table, including scandium, yttrium and 15 lanthanides. The in-depth study of rare earth elements will not only help discover new properties and explore new materials, but also promote the development of inorganic chemistry. The excellent optical, electrical, and magnetic properties of rare earth elements are known as the treasure house of new materials, and have become an important strategic element and the commanding height of the world's scientific and technological competition. Anhydrous rare earth chlorides have also received more and more attention as precursors for the preparation of rare earth metal organic complexes. [0004] The...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing anhydrous rare earth chloride in view of the insufficient technology of synthesizing anhydrous rare earth chloride at present. The method has the advantages of simple operation, high product purity and high yield.