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

Anhydrous samarium chloride and preparation method thereof

A technology of samarium chloride and samarium chloride, which is applied in the preparation/treatment of rare earth metal compounds, rare earth metal chlorides, rare earth metal halides, etc., can solve the problems of adverse effects of rare earth materials on performance, and avoid pollution, The effect of short process flow and isolation of water and oxygen

Active Publication Date: 2021-12-10
TIANJIN BAOGANG RES INST OF RARE EARTHS
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the preparation process, rare earth halides are prone to hydrolysis reactions to generate oxyhalides, which have an adverse effect on the performance of rare earth materials prepared by using rare earth halides.

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
  • Anhydrous samarium chloride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 1000g of Samarium Chloride Hydrate, put it in a vacuum equipment, evacuate the system to below 0.01MPa, start gradient temperature program dehydration, and keep it at 160°C, 220°C and 250°C for 3 hours, and get about 705g to remove most of the crystal water. crude anhydrous samarium chloride. Mix crude anhydrous samarium chloride and metallic magnesium at a molar ratio of 2:1 (there is a slight excess of crude anhydrous samarium chloride), transfer it to a vacuum distillation device, and start to heat up after vacuuming (vacuum degree ≤ 10Pa at this time) Keep warm at 520°C for 4 hours to completely react the crude anhydrous samarium chloride with metal magnesium; then continue to heat up to 700°C to remove low-boiling impurities in the raw material, at which point the magnesium chloride is sublimated. After replacing the collector, draw a high vacuum (vacuum degree ≤ 0.1Pa at this time), then continue to heat up to 760 ° C for 4 hours, and receive the distilled s...

Embodiment 2

[0034] Weigh 500g of samarium chloride hydrate, place it in a vacuum device, evacuate the system to below 0.01MPa, start gradient temperature program dehydration, and keep warm at 180°C, 240°C and 260°C for 2 hours respectively, and obtain about 353g to remove most of the crystal water crude anhydrous samarium chloride. Mix crude anhydrous samarium chloride and metallic calcium at a molar ratio of 2:1 (there is a slight excess of crude anhydrous samarium chloride), transfer to a vacuum distillation device, and start to heat up after vacuuming (vacuum degree ≤ 10Pa at this time) Heat at 550°C for 3 hours to completely react crude anhydrous samarium chloride with metal magnesium; then continue to heat up to 700°C to remove low-boiling impurities in the raw materials. After replacing the collector, draw a high vacuum (vacuum degree ≤ 0.1Pa at this time), then continue to heat up to 760 ° C for 3 hours, and receive the distilled samarium chloride, cool down and process to obtain h...

Embodiment 3

[0037] Weigh 500g of samarium chloride hydrate, place it in a vacuum device, evacuate the system to below 0.01MPa, start gradient temperature program dehydration, and keep warm at 180°C, 240°C and 260°C for 2 hours to obtain about 350g and remove most of the crystal water crude anhydrous samarium chloride. According to the stoichiometric ratio of 3:1, mix the crude anhydrous samarium chloride and metal lanthanum (in which the crude anhydrous samarium chloride is slightly excessive), transfer to the vacuum distillation device, and start vacuuming after vacuuming (at this time, the vacuum degree is ≤10Pa). Raise the temperature to 550°C and keep it warm for 3 hours to make the crude anhydrous samarium chloride and metal lanthanum completely react; then continue to raise the temperature to 700°C to remove low-boiling impurities in the raw materials. After replacing the collector, draw a high vacuum (vacuum degree ≤ 0.1Pa at this time), then continue to heat up to 760 ° C for 3 ho...

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 provides anhydrous samarium chloride and a preparation method thereof. The method comprises the steps: removing the crystal water in samarium chloride hydrate under the vacuum condition; enabling the anhydrous samarium chloride to react with metal M, and obtaining the anhydrous samarium chloride extremely high in absolute purity through the impurity removal and vacuum distillation process. The impurity removal and distillation processes are carried out in a high vacuum environment, so water and oxygen are strictly isolated, and the product is prevented from being polluted; in addition, the technological process is short, operation is easy, and industrial production is easy.

Description

technical field [0001] The invention belongs to the field of preparation of rare earth materials, and in particular relates to anhydrous samarium chloride and a preparation method thereof. Background technique [0002] Rare earth elements are the general name of Group IIIB lanthanide elements and yttrium in the periodic table. They are elements with a strategic position in the 21st century. They have unique physical and chemical properties such as light, electricity, and magnetism. They are widely used in various fields of national economy and national defense industry. Known as "the treasure house of new materials in the 21st century". [0003] High-purity anhydrous rare-earth halides are important chemical raw materials and the core raw materials for the preparation of high-purity rare-earth metals and a new generation of high-performance rare-earth scintillation crystals, and have extremely broad application prospects. However, during the preparation process, the rare ea...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/271C01F17/10
CPCC01F17/271C01F17/10C01P2006/80C01P2006/82
Inventor 汪瑞张瑞森高淞李璐张光睿赵长玉彭维王安丽
Owner TIANJIN BAOGANG RES INST OF RARE EARTHS