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Sieve plate-free fluidized bed as well as preparation method of boron trichloride

A boron trichloride, sieve-free technology, applied in chemical instruments and methods, boron halide compounds, boron halides, etc., to achieve the effects of simple equipment, improved production efficiency, and reduced energy consumption

Active Publication Date: 2014-01-15
昆明先导新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is a preparation method of boron trichloride, which solves the problem of phosgene, a difficult-to-separate impurity gas produced during the reaction process.

Method used

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  • Sieve plate-free fluidized bed as well as preparation method of boron trichloride
  • Sieve plate-free fluidized bed as well as preparation method of boron trichloride
  • Sieve plate-free fluidized bed as well as preparation method of boron trichloride

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preparation example Construction

[0032] The preparation method of boron trichloride according to the second aspect of the present invention adopts the fluidized bed without sieve plates described in the first aspect above, and the preparation method of boron trichloride includes: passing the powder raw material alkaline earth metal boride through The raw material supply device 4 is filled in the bed body 1 of the fluidized bed device without a sieve plate; the carrier gas source 2 is opened, and the carrier gas is passed into the bed body 1 of the fluidized bed device without a sieve plate, so that the powder raw material is The bed body 1 of the fluidized bed device without a sieve plate is in a fluidized state; the heating device 5 is turned on to heat the bed body 1, and after the temperature reaches the specified temperature, the reaction gas anhydrous hydrogen chloride is introduced; after the reaction reaches the specified period of time , open and start the separation device 7, to obtain the required bo...

Embodiment 1

[0050] Fill calcium hexaboride powder with a particle size of 20-30 mesh in the bed body 1 of a fluidized bed without a sieve plate through the raw material supply device 4 at a flow rate of 80 g / h; open the carrier gas source 2, and pass nitrogen gas into the In the bed body 1 of the fluidized bed of the sieve plate, the powder calcium hexaboride is in a fluidized state in the bed body 1 of the fluidized bed without the sieve plate; open the heating device 5 to heat the bed body 1, and when the temperature reaches 550 After ℃, the reaction gas anhydrous hydrogen chloride, which is dehydrated and dried by the reaction gas treatment device 9, is passed into the bed body 1 at a flow rate of 500g / h, and the nitrogen flow rate is continuously reduced to maintain the fluidized state of calcium boride, and the reaction is performed for 1 hour; then open And start the separation device 7, separate calcium chloride slag and calcium boride through the filter column that the glass fiber ...

Embodiment 2

[0052] Fill the 100~120 mesh powdered calcium hexaboride in the bed 1 of the fluidized bed without sieve plate through the raw material supply device 4 at a flow rate of 85g / h; open the carrier gas source 2, and pass argon gas into the sieve plate-free fluidized bed In the bed body 1 of the fluidized bed, the powdered calcium hexaboride is in a fluidized state in the bed body 1 of the fluidized bed without sieve plates; the heating device 5 is turned on to heat the bed body 1, and after the temperature reaches 700°C , feed the reaction gas anhydrous hydrogen chloride, which is dehydrated and dried by the reaction gas treatment device 9, into the bed body 1 at a flow rate of 600g / h, and at the same time continuously reduce the flow rate of argon to maintain the fluidized state of calcium boride, and react for 1.5h; then open And start the separation device 7, separate the calcium chloride slag and calcium boride through the filter column that the glass fiber in the gas-solid sep...

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Abstract

Disclosed are a fluidized bed without a sieve plate and a method for preparing boron trichloride using same. The method comprises: filling the bed body (1) of a fluidized bed without a sieve plate with a powder raw material, i.e. an alkaline earth metal boride, via a raw material supplying device (4); opening a carrier gas source (2), feeding the carrier gas into the bed body (1) of the fluidized bed without a sieve plate, so that the powder raw material i.e. the alkaline earth metal boride is in a fluidized state in the bed body (1) of the fluidized bed without a sieve plate; opening a heating device (5) to heat the bed body (1), feeding a reaction gas i.e. anhydrous hydrogen chloride when the temperature reaches the specified temperature; and after the reaction reaches the specified time, opening and starting a separating device (7), so as to obtain the necessary boron trichloride.

Description

technical field [0001] The invention relates to the field of material synthesis, more specifically to a fluidized bed without a sieve plate and a method for preparing boron trichloride. Background technique [0002] Boron trichloride can be used in processes such as diffusion of silicon semiconductor devices, ion implantation, dry etching, and manufacturing of solar cell components; it can also be used as a basic material for the production of optical fibers and as a catalyst in the polymerization of styrene, and for aluminum , zinc, magnesium, and copper alloys to remove nitrides, carbides, and oxides from molten metal; used as a welding flux for alloys such as aluminum, iron, zinc, tungsten, and monel; boron trichloride is also used It can be used to extinguish the magnesium fire in the heat treatment furnace and rocket propellant; it can be used as an intermediate for the preparation of diborane, high temperature resistant metal borides, etc., and pyrolytic boron nitride....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24C01B35/06
CPCB01J8/1827C01B35/061
Inventor 高远朱刘
Owner 昆明先导新材料科技有限责任公司
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