A kind of holmium oxide separation process

Abstract

The invention provides a holmium oxide separation process, which comprises the following steps: saponifying the mixture of P507 and sulfonated kerosene to obtain organic load A, which is added to 1# extraction tank; Separation and extraction are carried out in the 2# extraction tank connected with the 1# extraction tank, and the organic load B and the organic load C are respectively drawn out; the organic load B is washed in the 3# extraction tank to obtain middle rare earth and holmium containing a small amount of yttrium after enrichment. Feed liquid; introduce it into 4# extraction tank for separation and extraction, and draw out organic load D; add it to 5# extraction tank for separation and extraction to obtain a mixture of yttrium chloride and holmium chloride; add light to 6# extraction tank Rare earth is organically loaded with E, and a mixture of yttrium chloride and holmium chloride is introduced for separation and extraction to obtain enrichments of pure holmium chloride and yttrium chloride respectively; Get holmium oxide. The holmium oxide separation process of the present application has low energy consumption, high efficiency and low cost.

Description

technical field [0001] The invention relates to the technical field of rare earth oxide separation and purification, in particular to a holmium oxide separation process. Background technique [0002] Holmium is one of rare earth elements, which is easily oxidized at high temperature to form holmium oxide. Holmium oxide is the strongest known paramagnetic substance and can be used as an additive for new magnet materials. With the popularization and promotion of LED technology, the demand for yttrium oxide decreases, while the growth rate of magnetic materials is faster, and the demand for holmium increases. However, the content of holmium in the mixed rare earth is low at about 0.75%, and the separation is difficult. [0003] The existing rare earth element separation process is generally extracted and grouped to obtain a group of heavy rare earths (holmium erbium thulium ytterbium lutetium yttrium) mixed rare earths, and through the naphthenic acid system about 140 levels o...

AI Technical Summary

Problems solved by technology

In order to obtain holmium products, it must go through the yttrium oxide extraction line of naphthenic acid system, and then separate holmium / erbium to obtain pure holmium, but this process consumes a lot of acid and alkali, high energy consumption, long purification route, high cost, and low efficiency.

Images