Process for constant temperature extracting and completely separating high purity holmium, erbium, thulium, ytterbium and lutetium

Abstract

The invention relates to a process for constant temperature extracting and completely separating high purity holmium, erbium, thulium, ytterbium and lutetium, which takes a holmium lutetium rare earth chloride solution as a raw material, the processes of constant temperature extracting ytterbium and lutetium and then separating ytterbium and lutetium are carried out to obtain a 99.99% thulium chloride solution, a 99.99% lutetium chloride solution, a 99.99% ytterbium chloride solution and a holmium yttrium erbium solution; the holmium yttrium erbium solution removes yttrium through naphthenic acid and is separated through holmium and erbium to obtain a 99.99% holmium chloride solution and a 99.99% erbium chloride solution. The process of the invention breaks the restriction that the production of holmium, erbium, thulium, ytterbium and lutetium uses extraction production under the normal temperature which can not reach the product purity requirements; and the problem that a traditional steam direct heating method can not effectively control the constant state of the extraction system temperature and the system temperature by using a box external heating method can not reach the temperature more than 23 DEG C; the process can solve the disadvantages of high energy consumption, low product purity, unstable quality, and high manufacture cost; and the process of the invention has the advantages of easy connection with other rare earth production lines and obvious economic benefit.

Description

technical field [0001] The invention relates to a method for separating holmium and lutetium concentrates, specifically a process for constant temperature extraction and full separation of high-purity holmium, erbium, thulium, ytterbium and lutetium, which belongs to the technical field of rare earth extraction and separation. Background technique [0002] In recent years, with the rapid development of new materials and technologies, the application fields of medium and heavy rare earths have been continuously developed and expanded, and the prices of series products have gradually increased, making further separation and purification of holmium-lutetium concentrates imperative. At present, when producing high-purity holmium, erbium, thulium, ytterbium, and lutetium, the extraction system is usually produced at room temperature or by heating outside the box. However, the traditional steam direct heating method not only has high steam energy consumption, it is difficult to rea...

AI Technical Summary

Problems solved by technology

At present, when producing high-purity holmium, erbium, thulium, ytterbium, and lutetium, the extraction system is usually produced at room temperature or by heating outside the box. However, the traditional steam direct heating method not only has high steam energy consumption, it is difficult to realize automatic control, and the material liquid is also It is easy to crystallize, and the heating amount is limited by the flow rate of the material liquid; the indirect heating method relies on the radiation of heat to achieve heating, not only the energy consumption of steam is high, but also the heating effect is not good, and it is impossible to achieve the requirement of system temperature above 23 degrees.

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