Preparation method and device of chlorine trifluoride

A technology of chlorine trifluoride and chlorine gas, applied in directions such as interhalogen compounds, can solve the problems of restricting the industrialization scale of chlorine trifluoride, low equipment reliability, complicated production process, etc., so as to shorten the reaction time and product yield. The effect of raising and lowering the reaction temperature

Active Publication Date: 2015-04-01
PERIC SPECIAL GASES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In summary, the currently known preparation methods of chlorine trifluoride mainly have problems such as low equipment reliab

Method used

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  • Preparation method and device of chlorine trifluoride

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Embodiment 1

[0046] A schematic diagram of a preparation device for chlorine trifluoride is as figure 1 As shown, the device comprises a catalytic reactor 4, a cryogenic collector 6, a chlorine trifluoride storage tank 8 and a vacuum pump 10;

[0047] Wherein, the catalytic reactor 4 is provided with an air inlet pipe, and the air inlet pipe includes a fluorine gas pipe 1, a chlorine gas pipe 2 and a dilution gas pipe 3; an emptying pipe is arranged on the cryogenic collector, and the emptying pipe includes a normal pressure emptying pipe 9 And vacuum evacuation pipe 11, vacuum pump 10 is installed at the outlet end of vacuum evacuation pipe 11;

[0048] The overall connection relationship is:

[0049] The catalytic reactor 4 is connected with the low-temperature collector 6 through a connection pipe one 5; the low-temperature collector 6 is connected with the chlorine trifluoride storage tank 8 through a connection pipe two 7;

[0050] The constituent materials of the cryogenic collecto...

Embodiment 2

[0054] A preparation method for chlorine trifluoride, the specific steps of the method are as follows:

[0055] (1) Put cobalt fluoride pellets with a diameter of 10 to 20mm into the reactor, first vacuumize the various parts of the device with a vacuum pump; then use a diluted gas to purge and replace the residual air and moisture in the system ; Chlorine, fluorine, and nitrogen are passed into the catalytic reactor at a flow rate of 0.1L / min, 0.3L / min, and 1.2L / min respectively, and the operating pressure of the catalytic reactor is set to 0.6MPa, at 400°C Reaction, obtain product 1;

[0056] (2) Pass the product 1 into the liquefaction collector, set the operating pressure of the liquefaction collector to 0.6MPa, cool and liquefy at 0°C, and send the low-boiling point gas impurities to the tail gas treatment system through the exhaust pipeline. Dispose of and empty. After 20 hours, the introduction of chlorine and fluorine gas was stopped, and the heating of the reactor w...

Embodiment 3

[0062] A preparation method for chlorine trifluoride, the specific steps of the method are as follows:

[0063] (1) Put nickel fluoride pellets with a diameter of 10-20mm into the reactor, first vacuumize and pre-treat each part of the device with a vacuum pump; then use a diluted gas to purge and replace the residual air and moisture in the system ; Pass chlorine, fluorine, and helium into the catalytic reactor at a flow rate of 1L / min, 4L / min, and 40L / min respectively, set the operating pressure of the catalytic reactor to -0.09MPa, and react at 100°C , to obtain the product 1;

[0064] (2) Pass the product 1 into the liquefaction collector, set the operating pressure of the liquefaction collector to -0.09MPa, cool and liquefy at -100°C, and send the low-boiling point gas impurities to the tail gas treatment system through the exhaust pipeline. Void after chemical treatment. After 3 hours, the introduction of chlorine and fluorine gas was stopped, and the heating of the re...

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Abstract

The invention discloses a preparation method and device of chlorine trifluoride and belongs to the field of fine chemical engineering. The method comprises the following steps: mixing chlorine gas, fluorine gas and a diluent gas, and then charging the mixed gas in a reactor filled with a catalyst, and reacting at 100-400 DEG C to obtain a product 1; then carrying out cooling, liquidation, lightweight material discharge and vaporization treatments on the product 1 to obtain the chlorine trifluoride. The device comprises a catalytic reactor, a low-temperature collector, a chlorine trifluoride storage tank and a vacuum pump, wherein the catalytic reactor, the low-temperature collector and the chlorine trifluoride storage tank are sequentially connected through pipelines. The process is low in reaction temperature, short in reaction time and high in product yield; the device has the advantages that the length of the reactor is greatly shortened and the production process of chlorine trifluoride is simplified.

Description

technical field [0001] The invention relates to a preparation method and device for chlorine trifluoride, which is suitable for the industrial production of chlorine trifluoride gas prepared by catalytic synthesis reaction using fluorine gas and chlorine gas as raw materials, and belongs to the fine chemical industry field. Background technique [0002] Chlorine trifluoride is the most active halogen fluoride known chemically, and is a powerful fluorinating agent. The boiling point of chlorine trifluoride is 11.5°C. It is a gas that is easy to condense under normal circumstances. It can be reacted in any state of gas or liquid as required, which is beyond the reach of general fluorinating agents. Many metal oxides and chlorides react with chlorine trifluoride to generate corresponding chlorides when heated. Using the characteristics of chlorine trifluoride, many important metal fluorides can be prepared, especially for the separation and purification of rare elements. . Wi...

Claims

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Application Information

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IPC IPC(8): C01B7/24
CPCC01B7/24
Inventor 刘智慧王新喜李翔宇孟祥军柳彤蒋玉贵冀延治纪振红
Owner PERIC SPECIAL GASES CO LTD
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