Method for purifying and refining high-purity scandium oxide from scandium hydroxide intermediate product

A technology of scandium hydroxide and scandium oxide, which is applied in the direction of scandium oxide/scandium hydroxide, rare earth metal oxides/hydroxides, rare earth metal compounds, etc. High-purity scandium oxide process is cumbersome and other problems, to achieve the effect of shortening the process flow, simple operation, and short process

Pending Publication Date: 2021-02-05
JINGMEN GEM NEW MATERIAL
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the cumbersome process and poor pertinence of the preparation of high-purity scandium oxide in the prior art, the present invention uses scandium hydroxide as the starting material, and aims at the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for purifying and refining high-purity scandium oxide from scandium hydroxide intermediate product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Calcining 1000g scandium hydroxide intermediate product at 800°C for 2h to obtain crude scandium oxide.

[0032] Slurry the crude scandium oxide with water to obtain a slurry, add hydrochloric acid to the slurry to adjust the pH to 1.5, maintain the pH at 1.5 and react for 3 hours, filter to obtain the first filter residue, wash the first filter residue with pure water to obtain a leaching residue.

[0033] Put the first-stage leaching residue into a hydrochloric acid solution with a hydrogen ion concentration of 6 mol / L, react at 90°C for 5 hours, and filter to obtain a scandium-rich second-stage leaching solution.

[0034] The second-stage leachate is extracted and phase-separated with extractant P350 to obtain a scandium-rich organic phase; the volume concentration of the extractant P350 is 40%, and the second-stage leachate is extracted with extractant P350 and the diluent used for phase separation is sulfur kerosene. The extraction ratio is O / A=1:1, and the extrac...

Embodiment 2

[0039] Calcining 1000g scandium hydroxide intermediate product at 800°C for 1.5h to obtain crude scandium oxide.

[0040]Slurry the crude scandium oxide with water to obtain a slurry, add hydrochloric acid to the slurry to adjust the pH to 2.0, maintain the pH at 2.0 and react for 4 hours, filter to obtain the first filter residue, wash the first filter residue with pure water to obtain a leaching residue.

[0041] Put the first-stage leaching residue into a hydrochloric acid solution with a hydrogen ion concentration of 8 mol / L, react at 90°C for 3 hours, and filter to obtain a scandium-rich second-stage leaching solution.

[0042] The second-stage leachate is extracted and phase-separated with extractant P350 to obtain a scandium-rich organic phase; the volume concentration of the extractant P350 is 30%, and the second-stage leachate is extracted with extractant P350 and the diluent used for phase separation is sulfur kerosene. The extraction ratio is O / A=2:1, and the numbe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for purifying and refining high-purity scandium oxide from a scandium hydroxide intermediate product, which comprises the following steps: calcining the scandium hydroxide intermediate product to obtain crude scandium oxide; adding water into the crude scandium oxide for slurrying, adding inorganic acid to adjust the pH value to 1.0-3.0, and conducting filtering and washing to obtain first-stage leaching residues; putting the first-stage leaching residues into an inorganic acid solution, and conducting filtering to obtain a second-stage leaching solution; performing extraction and phase splitting on the second-stage leaching solution by using an extraction agent P350, and then performing reverse extraction and phase splitting to obtain a scandium-containingreverse extraction solution; adding an oxalic acid solution into the scandium-containing reverse extraction solution, adding a back-regulating agent to regulate the pH value to 0.5-2.0, and conducting filtering and washing to obtain scandium oxalate precipitate; and calcining the scandium oxalate precipitate to obtain refined high-purity scandium oxide. Aiming at the characteristic difference ofscandium oxide and impurity elements, the high-purity scandium oxide is prepared by combining the segmented leaching and extraction processes, so that the process flow can be greatly shortened.

Description

technical field [0001] The invention belongs to the field of rare earth metallurgy, and in particular relates to a method for purifying high-purity scandium oxide from scandium hydroxide intermediate products. Background technique [0002] As a rare earth metal element, scandium is widely used in lighting industry, alloy industry, ceramic materials, catalytic materials and other fields. For example, aluminum-scandium alloys made of scandium and aluminum are widely used in aerospace, aviation, missiles, ships and other fields due to their advantages such as low density, high strength, high hardness, and good thermal stability, and are gradually turned to civilian applications, such as sports equipment, computers, etc. , mobile phone case, etc. Scandium sodium halogens made of scandium oxide are widely used in lighting in various occasions due to their good luminosity, energy saving, long life, and strong fog breaking ability. Lasers made of high-purity scandium oxide and va...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01F17/212C01F17/17
CPCC01F17/212C01F17/17C01P2006/80
Inventor 许开华朱少文李琴香张坤苏陶贵马驰远
Owner JINGMEN GEM NEW MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap