Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing layered scandium oxide powder

A scandium oxide and layered technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve problems such as increased production costs, uneven particle size of products, and affecting the performance of scandium-based materials, etc., to achieve easy operation , The preparation process conditions are simple, and the effect of reducing the tail gas treatment process

Active Publication Date: 2019-11-22
CHINA ENFI ENGINEERING CORPORATION
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seriously affects the stability of scandium oxide powder material products, resulting in increased production costs, and at the same time, due to the inhomogeneity of product particle size, seriously affects the performance of scandium-based materials, thus limiting the application of scandium oxide powder materials

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 preparing layered scandium oxide powder
  • Method for preparing layered scandium oxide powder
  • Method for preparing layered scandium oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take a 0.1mol / l scandium chloride solution, and add a certain amount of ammonium sulfate dispersant at 75°C. At a stirring speed of 100 r / min, ammonia water was slowly added dropwise to carry out the precipitation reaction, so that the pH value of the precipitation reaction system was finally 6. Then keep stirring at a stirring speed of 100r / min for 30min, then carry out an aging reaction for 30min, filter the obtained scandium-containing precipitation system, then dissolve it with hydrochloric acid and dilute it to 100ml with pure water, and transfer it to the precipitation reactor middle. At a stirring speed of 200r / min, the precipitant is continuously added to the reactor according to the molar ratio of scandium ion and oxalic acid precipitant of 1:1.5, and the pH value of the system is continuously adjusted by ammonium salt during the period. After adding the precipitant, determine The final pH value of the system is about 5, and then the stirring speed is kept at ...

Embodiment 2

[0033] Take a 0.15 mol / l scandium chloride solution and add a certain amount of ammonium sulfate dispersant at 95°C. At a stirring speed of 200 r / min, the ammonia precipitation agent was slowly added dropwise to carry out the precipitation reaction until the pH value of the precipitation reaction system was 8. Then continue to stir at a stirring speed of 200r / min for 80min, age at 95°C for 180min, filter the obtained precipitate-containing system, dissolve it with hydrochloric acid and dilute to 100ml with pure water, and transfer to the precipitate in the reactor. At a stirring speed of 100r / min, the precipitant is continuously added to the reactor according to the molar ratio of scandium ion and oxalic acid precipitant of 1:1.5, and ammonia water is continuously used to adjust the pH value of the system at the same time. After adding the precipitant, determine the system The final pH value is about 4, and then the mixture is continuously stirred at a stirring speed of 200 r...

Embodiment 3

[0035] Take a 0.075mol / l scandium chloride solution, and add a certain amount of ammonium sulfate dispersant at 85°C. At a stirring speed of 200 r / min, the ammonia water precipitation agent was slowly added dropwise to carry out the precipitation reaction until the pH value of the precipitation reaction system was 7.5. Then keep stirring at a stirring speed of 150r / min for 60min, age and react at 85°C for 60min, filter the obtained precipitate containing system, dissolve it with hydrochloric acid and dilute to 100ml with pure water, transfer to the precipitate in the reactor. At a stirring speed of 200r / min, the precipitant was continuously added to the reactor according to the molar ratio of scandium ions and ammonium oxalate precipitant at 1:1.5, and ammonia water was continuously used to adjust the pH value of the system at the same time. After adding the precipitant, determine The final pH value of the system is about 2, and then the stirring speed is kept at 100r / min for...

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

Disclosed is a method for producing a layered scandium oxide powder, which comprises: solution formation: preparing a scandium ion-containing solution; primary precipitation: adding a weak base precipitant as a precipitant into the solution to carry out precipitation reaction; dissolution: dissolving the precipitate obtained in the primary precipitation step with hydrochloric acid; secondary precipitation: adding oxalic acid or oxalate as a precipitant into the solution obtained in the dissolving step to carry out precipitation reaction; and drying and roasting: washing, drying and roasting the prepared precipitate. According to the method, the layered scandium oxide powder material is prepared with an alkaline substance and oxalic acid or oxalate as precipitants and ammonium salt as an adjusting agent and a dispersing agent and controlling certain reaction process conditions, so that the controllability of the material morphology is of great significance for researching materials. Meanwhile, the layered scandium oxide powder material prepared by the invention enhances the multifunctionality of scandium oxide and widens the application of scandium oxide.

Description

technical field [0001] The invention belongs to the field of compound preparation, and in particular relates to a method for preparing layered scandium oxide powder. Background technique [0002] As an important non-renewable strategic resource, rare earth is an indispensable key factor for the development of new material industry. Scandium is one of the 17 rare earth elements with special physical and chemical properties, and has broad application prospects in non-ferrous metallurgy, high-performance materials and other products. Scandium oxide is the raw material for the production of most scandium-based materials, and can be used to make aluminum-scandium master alloys, high-efficiency lasers, scandium-doped ceramic powder materials, scandium sodium lamps, laser crystal matrix materials, catalysts, special ceramics, etc. The research on scandium-based materials promotes the high-value development and utilization of scandium resources in my country, transforms the advanta...

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): C01F17/00
CPCC01P2004/61C01P2004/03
Inventor 付国燕王玮玮刘召波李晓艳韩国强
Owner CHINA ENFI ENGINEERING CORPORATION