Preparation method and application of ultra-high purity scandium oxide

A scanning scandium oxide, ultra-high technology, applied in the field of metallurgy, can solve the problems of inability to deeply remove actinides, lanthanide rare earth elements, complicated preparation process operations, and low purity of scandium oxide, so as to reduce equipment investment costs, energy consumption, and operation The effect of simple process and short process

Active Publication Date: 2022-07-19
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on the above problems, the object of the present invention is to provide a preparation method and application of ultra-high-purity scandium oxide, so as to solve the problem that the scandium oxide prepared by the existing scandium oxide preparation method has low purity and cannot deeply remove the actinides uranium, thorium, Lanthanide rare earth elements, titanium and zirconium, and the preparation process is complicated and expensive

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  • Preparation method and application of ultra-high purity scandium oxide
  • Preparation method and application of ultra-high purity scandium oxide
  • Preparation method and application of ultra-high purity scandium oxide

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preparation example Construction

[0025] figure 1 A flow chart of a method for preparing ultra-high-purity scandium oxide in an optional embodiment of the present invention is schematically shown. like figure 1 As shown, a method for preparing ultra-high-purity scandium oxide provided by the present invention may include: acid-dissolving / tempering crude scandium oxide with acid / tempering agent, removing uranium (iron), removing zirconium, removing rare earth and other impurities, washed with hydrochloric acid, decomposed / back-extracted with a stripping agent, quenched and tempered with acid, removed thorium uranium and rare earth impurities, etc., precipitated and calcined, and obtained ultra-high-purity scandium oxide.

[0026] This embodiment of the present invention mainly realizes the ultra-high purification preparation of scandium in the hydrochloric acid system. This method can not only deeply remove actinide elements uranium and thorium, lanthanide rare earth elements, titanium and zirconium, etc., but...

Embodiment 1

[0063] The whole process of this example is carried out in a class 10,000 clean laboratory. The main components of the crude scandium oxide in this example are shown in Table 1 below.

[0064] The main impurities of table 1 crude scandium oxide (g / t)

[0065] Sc2O3 99.01％ Sc2O3 / REO 99.97％ La2O3 22.8 Al2O3 15.3 CeO2 28.2 ZrO2 15.8 Nd2O3 22.5 ThO2 307 Y2O3 60.8 U2O3 5 Er2O3 52.1 CuO 8.2 Rare earth impurities 259.2 V2O5 9.1 Fe2O3 61.2 Na2O 170 CaO 50 NiO 6.9 SiO2 38 TiO2 9.2

[0066] First, use hydrochloric acid to dissolve the crude scandium oxide sample; adjust the acidity to 9M; the filtrate is first finely filtered and then filtered through a N235 resin column to remove iron and uranium; Then extract with TBP (solvent), the extraction conditions are TBP 100%, O / A 1:1, and the extraction reaction time is 5 minutes; then the loaded organic phase is washed with 8M hydrochloric aci...

Embodiment 2

[0074] The whole process of this example is carried out in a class 10,000 clean laboratory. The main components of the crude scandium oxide in this example are also shown in Table 1.

[0075] First, use hydrochloric acid to dissolve the crude scandium oxide sample; adjust the acidity to 8M; filter the filtrate first, then filter the iron and uranium through N235 resin column; Extraction with TBP (solvent), extraction conditions TBP 50%, O / A 2:1, extraction reaction time 5min, cross-flow extraction 2-stage; then use 8M hydrochloric acid to wash the loaded organic phase, wash conditions O / A 2:1, wash Time 5min; use 3M HCl for back extraction, the ratio of back extraction is O / A 2:1, time 5min, cross-flow washing 2 levels; add a small amount of nitric acid to control the effective ion concentration of nitrate should be ≥ 0.05mol / L, quenched and tempered Then pass the filtrate through PMBP resin; after the filtrate is concentrated, oxalic acid is used for precipitation, and calci...

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Abstract

The invention discloses a preparation method and application of ultra-high-purity scandium oxide. The preparation method includes: acid-dissolving crude scandium oxide or scandium chloride; quenching and tempering with strong acid, and purifying by extracting agent and / or leaching resin after quenching and tempering; and obtaining ultra-high-purity scandium oxide by precipitation after purification. The invention can not only realize the removal of rare earth impurity elements and common trace elements in scandium oxide, but also realize the deep removal of difficult-to-remove trace uranium and thorium elements and trace impurities of zirconium and titanium in scandium oxide; and the operation process of the invention is simple and has strong performance. Practical, no organic, weak base or strong base stripping is involved, no scandium loss will be caused, and the initial equipment investment cost and energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a preparation method and application of ultra-high-purity scandium oxide. Background technique [0002] Scandium and its compounds have many excellent properties, and they are widely used in energy materials, superconductivity, electronic products, etc., and the purity of scandium and its compounds is also very high during the application process. For example, for the preparation of GSGG and GSAG lasers The zirconium impurities in the scandium oxide of the rod should be less than 5ppm, and the content of zirconium in the 99.999% scandium oxide product should also be less than 10ppm, and the current scandium oxide separation and purification process is difficult to achieve such high purity requirements. [0003] Chinese patent CN104342559B discloses a method for comprehensively recovering multiple elements from zirconium oxychloride waste liquid. Although the purity of the meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/10C01F17/212
CPCC01F17/10C01F17/212
Inventor 刘召波王玮玮陈宋璇姚亮刘国
Owner CHINA ENFI ENGINEERING CORPORATION
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