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A method and device for preparing hydrogen fluoride

A hydrogen fluoride and reaction device technology, applied in the field of hydrogen fluoride preparation, can solve the problems of high risk, explosion, and unindustrialized application, and achieve the effect of uniform gas distribution and safe operation

Active Publication Date: 2017-10-13
PERIC SPECIAL GASES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the violent reaction between fluorine gas and hydrogen gas, an explosion will occur upon contact, and the danger is extremely high, so this method has not been applied industrially.

Method used

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  • A method and device for preparing hydrogen fluoride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] After vacuuming the entire reaction device through the vacuum system interface 5, add 100 L of liquid-phase hydrogen fluoride into the lower part of the reactor 9 with a volume of 200 L through the raw material gas inlet I1; feed fluorine into the reactor 9 through the raw material gas inlet I1 gas, the pressure to reactor 9 is 0.5 MPa; the temperature of reactor 9 is kept at -20 to 20°C by controlling the coolant flow rate at coolant inlet 3; the flow rate of 2L / min of hydrogen gas, after the hydrogen gas passes through the gas distributor 7, it reacts with the fluorine gas at the junction of the liquid phase to generate hydrogen fluoride; as the reaction progresses, the pressure in the reactor 9 gradually decreases, and when the pressure decreases to 0.15MPa, Stop adding hydrogen; add fluorine gas to the reactor 9 until the pressure of the reactor 9 is 0.5MPa, continue to add hydrogen; when the liquid phase volume of hydrogen fluoride produced is 20L, stop adding hydr...

Embodiment 2

[0038]After vacuuming the entire reaction device through the vacuum system interface 5, add 8 L of liquid-phase hydrogen fluoride into the lower part of the reactor 9 with a volume of 10 L through the raw material gas inlet I1; feed fluorine into the reactor 9 through the raw material gas inlet I1 The pressure to the reactor 9 is 0.4MPa; by controlling the coolant flow rate of the coolant inlet 3, the temperature of the reactor 9 is -40~40°C; through the raw material gas inlet II2, the flow rate of the reactor 9 is 0.1L / min of hydrogen gas, after the hydrogen gas passes through the gas distributor 7, it reacts with the fluorine gas at the junction of the liquid phase to generate hydrogen fluoride; as the reaction progresses, the pressure of the reactor 9 gradually decreases, until the pressure decreases to 0.1MPa , stop adding hydrogen; add fluorine to reactor 9, and continue to add hydrogen until the pressure of reactor 9 is 0.5MPa; The flow meter III11 metering flow is tran...

Embodiment 3

[0040] After vacuumizing the entire reaction device through the vacuum system interface 5, add 400L of liquid-phase hydrogen fluoride into the lower part of the reactor 9 with a volume of 2000L through the raw material gas inlet I1; feed fluorine into the reactor 9 through the raw material gas inlet I1 The pressure to the reactor 9 is 0.2MPa; by controlling the coolant flow rate at the coolant inlet 3, the temperature of the reactor 9 is kept at -40 to 40°C; min of hydrogen gas, after the hydrogen gas passes through the gas distributor 7, it reacts with the fluorine gas at the junction of the liquid phase to generate hydrogen fluoride; as the reaction progresses, the pressure in the reactor 9 gradually decreases, and when the pressure decreases to 0.1MPa, Stop adding hydrogen gas; add fluorine gas to reactor 9 until the pressure of reactor 9 is 0.5MPa, then continue to add hydrogen gas; when the volume of the hydrogen fluoride liquid phase produced is 300L, stop adding hydrogen...

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Abstract

The invention relates to a method and a device for preparing hydrogen fluoride, which belong to the technical field of chemical industry. The steps of the method are as follows: first vacuumize the entire reaction device, then add liquid-phase hydrogen fluoride into the reactor; add fluorine gas to the upper gas phase space of the reactor until the pressure of the reactor is 0.2-0.5 MPa, and control The temperature of the reactor is -40-40°C; hydrogen gas with a flow rate of 0.1-10L / min is added to the liquid phase space of the reactor. After the hydrogen gas passes through the gas distributor, it reacts with the fluorine gas at the junction of the liquid phase plane to obtain the Hydrogen fluoride. The device is mainly composed of feed gas inlet I, feed gas inlet II, flowmeter I, coolant inlet, flowmeter II, coolant outlet, jacket, reactor, gas distributor, heat exchanger, vacuum system interface, flow rate Meter Ⅲ and low-temperature memory components. The device of the invention can realize the direct reaction of fluorine gas and hydrogen gas, has safe operation, and the prepared hydrogen fluoride has high purity and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a method and a device for preparing hydrogen fluoride, which belong to the technical field of chemical industry. Background technique [0002] Hydrogen fluoride is a widely used chemical, and its main application fields are as follows: (1) As a raw material for the preparation of fluorine-containing compounds, it is used for the preparation of fluorine salts, fluorine-containing refrigerants, fluorine-containing plastics, fluorine-containing rubber, fluorine-containing resins and Fluorine source for substances such as fluorine-containing medicines or pesticides; (2) as a strong acid etchant for etching glass, pickling metals, and etching semiconductor surfaces; (3) as a catalyst for alkylation reactions; (4) as a Analytical reagent; (5) as cleaning gas. [0003] Industrial hydrogen fluoride is produced by heating reaction of fluorite and sulfuric acid: [0004] CaF 2 +H 2 SO 4 →2HF+CaSO 4 [0005] Using this method to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/19
Inventor 柳彤孟祥军董云海孙秋丽岳立平张帅王志民乔蓓蓓
Owner PERIC SPECIAL GASES CO LTD