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Method for preparing pure boron

A technology of pure boron and boron content, applied in the field of boron preparation technology, can solve the problems of high cost and low purity, and achieve the effects of less pollution, simple production process and low cost

Inactive Publication Date: 2010-09-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing magnesia thermal reduction process has the problems of high cost and low purity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0006] The present invention is a kind of preparation method of pure boron, and its steps are: B 2 o 3 According to the mass ratio of 1:2~3 with Mg, weigh the corresponding powdery material, carry out ball milling and mixing for 8~16 hours, put the mixed material in the mold and compact it under the pressure of 10~60MPa, put it on the surface Then react in the autoclave, purge the autoclave with argon to remove the air at room temperature, wait until the temperature of the container rises to 180°C, exhaust again, and then pass in 1~6MPa argon to continue to rise High container temperature; when the temperature in the container reaches about 260°C, the igniter starts to react and releases a large amount of heat, thereby initiating the reaction between the reaction materials, and the boron-containing material is obtained by cooling to room temperature with the furnace under the protection of argon, boron The content is greater than 90-98%, and the particle size is 0.1-10 μm.

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Embodiment 1

[0009] B 2 o 3 According to the mass ratio of 1:3 with Mg, weigh the corresponding powdery material, carry out ball milling and mixing for 8-16 hours, put the mixed material in the mold and compact it under the pressure of 60MPa, put the igniter on the surface, Then carry out the reaction in the autoclave, and at room temperature use argon to purge the autoclave to get rid of the air therein, wait until the temperature of the container rises to 180°C to exhaust again, then feed 6MPa of argon to continue to increase the temperature of the container; when the container When the internal temperature reaches about 260°C, the igniter starts to react and releases a large amount of heat, which triggers the reaction between the reaction materials. Under the protection of argon, it is cooled to room temperature with the furnace to obtain boron-containing materials. The boron content is 92.54%, and the particle size is is 10 μm. The prepared boron-containing material is leached throug...

Embodiment 2

[0011] B 2 o 3 With Mg in a mass ratio of 1:2.5, weigh the corresponding powdery material, carry out ball milling and mixing for 12 hours, place the mixed material in a mold and compact it under a pressure of 30MPa, put an igniter on its surface, and then Carry out the reaction in the autoclave, purge the autoclave with argon gas at room temperature to remove the air therein, wait until the temperature of the container rises to 180 ° C, exhaust again, and then feed 3MPa argon to continue to increase the temperature of the container; when the temperature in the container When it reaches about 260°C, the igniter starts to react and releases a large amount of heat, thereby initiating the reaction between the reaction materials. Under the protection of argon, it is cooled to room temperature with the furnace to prepare boron-containing materials. The boron content is 93.61%, and the particle size is 6μm. . The prepared boron-containing material is leached through 8-11.6 mol / L hy...

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Abstract

The invention discloses a method for preparing pure boron, which comprises the following steps of: weighing corresponding powdery materials in a weight ratio of B2O3 to Mg of 1 to 2-3; performing ball milling and mixing on the materials for 8 to 16 hours; putting the mixture in a mould and compacting the mixture under the pressure of between 10 and 60 MPa; putting ignition powder on the surface of the mixture; then reacting the mixture in a high pressure kettle; blowing the high pressure kettle with argon gas at room temperature so as to discharge the air therein; discharging the air again when the temperature of the container is raised to 180 DEG C; introducing the argon gas of 1 to 6MPa into the container and continuing to raise the temperature of the container; raising the temperature in the container to about 260 DEG C to perform reaction on the ignition powder and release a large amount of heat so as to initiate the reaction between the reaction materials; and finally cooling the reaction product along with the furnace under the protection of the argon gas to room temperature so as to prepare the boron-containing material, wherein the boron content is more than 90 to 98 percent and the particle size is 0.1 to 10 mu m.

Description

technical field [0001] The present invention relates to the preparation technology of boron. Background technique [0002] Elemental boron has been widely used in chemical industry, medicine, light industry, textile, metallurgy, building materials, national defense and military industry, cutting-edge science, agriculture and other industries, and has become an important component of insulating materials, temperature-resistant materials, wear-resistant materials, flame-retardant materials, and structural materials One of the important trace element fertilizers in agriculture. Among them, amorphous boron powder has the advantages of large specific surface area and high combustion calorific value, and has been valued in many fields such as military, aerospace, automobile and advanced material preparation. The development of boron fine chemical industry is the urgent task of boron industry. However, the existing magnesia thermal reduction process has the problems of high cost ...

Claims

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Application Information

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IPC IPC(8): C01B35/02
Inventor 喇培清鞠倩魏玉鹏卢学峰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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