Device and method for purifying bromine trifluoride

A bromine trifluoride and purification method technology, which is applied in the direction of interhalogen compounds, can solve the problem of low product purity, and achieve the effects of high purity, high production efficiency, and high phase separation efficiency

Inactive Publication Date: 2017-11-03
天津长芦华信化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purification method of this method is simple, and during the purification process, heavy components are not removed, and the product purity obtained is low

Method used

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  • Device and method for purifying bromine trifluoride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (ⅰ) After the purification system is cleaned, dried, pumped, and tested for leaks under negative pressure and positive pressure, it is replaced with high-purity nitrogen 5 times without leaking to ensure that there are no impurities other than nitrogen in the system.

[0052] (ii) Evacuate the adsorption tower and rectification tower to below -0.09Mpa, heat the vaporizer to 130°C, heat the adsorption tower to 120°C, evaporate 20kg of bromine trifluoride crude product in the vaporizer, and carry out adsorption purification in the adsorption tower.

[0053] (Ⅲ) After the bromine trifluoride in the vaporizer is completely evaporated, stop the heating of the vaporizer and the adsorption tower, and the bromine trifluoride vapor evaporated in the vaporizer passes through the adsorption tower and then enters the rectification tank to cool at room temperature, and the rectification tank is cooled to room temperature Finally, the rectification tank is evacuated to below -0.09 Mpa...

Embodiment 2

[0057] (ⅰ) After the purification system is cleaned, dried, pumped, and tested for leaks under negative pressure and positive pressure, it is replaced with high-purity nitrogen 5 times without leaking to ensure that there are no impurities other than nitrogen in the system.

[0058] (ii) Evacuate the adsorption tower and rectification tower to below -0.09Mpa, heat the vaporizer to 130°C, heat the adsorption tower to 120°C, evaporate 50kg of bromine trifluoride crude product in the vaporizer, and carry out adsorption purification in the adsorption tower.

[0059] (Ⅲ) After the bromine trifluoride in the vaporizer is completely evaporated, stop the heating of the vaporizer and the adsorption tower, and the bromine trifluoride vapor evaporated in the vaporizer passes through the adsorption tower and then enters the rectification tank to cool at room temperature, and the rectification tank is cooled to room temperature Finally, the rectification tank is evacuated to below -0.09 Mpa...

Embodiment 3

[0063] (ⅰ) After the purification system is cleaned, dried, pumped, and tested for leaks under negative pressure and positive pressure, it is replaced with high-purity nitrogen 5 times without leaking to ensure that there are no impurities other than nitrogen in the system.

[0064] (ii) Evacuate the adsorption tower and rectification tower to below -0.09Mpa, heat the vaporizer to 130°C, heat the adsorption tower to 120°C, evaporate 100kg of bromine trifluoride crude product in the vaporizer, and carry out adsorption and purification in the adsorption tower.

[0065] (Ⅲ) After the bromine trifluoride in the vaporizer is completely evaporated, stop the heating of the vaporizer and the adsorption tower, and the bromine trifluoride vapor evaporated in the vaporizer passes through the adsorption tower and then enters the rectification tank to cool at room temperature, and the rectification tank is cooled to room temperature Finally, the rectification tank is evacuated to below -0.0...

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PUM

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Abstract

The invention discloses a device and a method for purifying bromine trifluoride. The device comprises a vaporizer, an adsorption tower, a rectification purification device, a condensation collecting pipe, a front fraction collecting device, a main fraction collecting device, a rear fraction collecting device, a tail gas recycling system and a vacuum pump. The method includes steps of (i) pretreatment, (ii) adsorption purification and (iii) intermittent rectification purification. The device and the method for purifying the bromine trifluoride by means of adsorption and then intermittent rectification have the advantages that the device and the method are high in phase separation efficiency, light and heavy components can be thoroughly separated from one another, bromine trifluoride products obtained by the aid of the device and the method are high in purity, the purity of the bromine trifluoride products can reach 99.5%, and the device and the method are high in production efficiency.

Description

technical field [0001] The invention belongs to a bromine trifluoride purification device and method, in particular to a bromine trifluoride purification device and purification method. Background technique [0002] Bromine trifluoride is one of the strongest oxidants and is widely used in inorganic preparation. When synthesizing anhydrous metal fluorides, bromine trifluoride is a good fluorinating agent, which can convert metals, metal oxides, and metal chlorides, bromides and iodides into fluorides. [0003] Bromine trifluoride can be used as a fluoride solvent to dissolve sulfur hexafluoride, molybdenum hexafluoride, tungsten hexafluoride and other fluorides; it can be used as a propellant for rockets and missiles; it can also be used as an inorganic and organic substance of fluorinating agents. [0004] At present, the commonly used preparation process is to prepare bromine trifluoride by direct fluorination of elemental bromine, and obtain bromine trifluoride product ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/24
CPCC01B7/24
Inventor 李于教盖颖琪张潮仝庆杨牧野崔学文
Owner 天津长芦华信化工股份有限公司
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