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Reaction system for removing hydrogen fluoride in hydrogen chloride

A reaction system, hydrogen fluoride technology, applied in chlorine/hydrogen chloride, chlorine/hydrogen chloride purification, inorganic chemistry, etc., can solve the problems of poor defluorination effect and high difficulty in solid sampling

Active Publication Date: 2020-10-30
JIANGSU SANMEI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a reaction system for removing hydrogen fluoride in hydrogen chloride, aiming to solve the problems in the prior art such as poor fluorine removal effect and high difficulty in solid sampling

Method used

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  • Reaction system for removing hydrogen fluoride in hydrogen chloride
  • Reaction system for removing hydrogen fluoride in hydrogen chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Prepare a 0.1mol / L magnesium chloride solution in the external circulation system, and add calcium hydroxide to make the concentration 0.1mol / L. Prepare a 5mol / L magnesium chloride solution in the feeding system, and add calcium hydroxide at the same time to make the concentration also 5mol / L. Turn on the metering pump to 10m 3 Pump the multi-component active defluoridation solution in the external circulation system into the supergravity separator at a speed of 5m / h 3 The hydrogen chloride gas stream containing fluorinated products is fed at a speed of / h and the hydrogen fluoride content of the inlet is sampled. The internal pressure of the supergravity separator is controlled to 1.3MPa, and the rotor speed is 300r / min. After the reaction, the multi-component active defluoridation solution returns to the external circulation system through the liquid outlet, the gas enters the gas cabinet, decompresses and removes water, controls the pressure of the gas cabinet to ab...

Embodiment 2

[0045] Prepare 0.1mol / L ferric chloride solution in the external circulation system, and add calcium hydroxide to make the concentration 0.1mol / L. Prepare 5mol / L ferric chloride solution in the feeding system, and add calcium hydroxide at the same time to make the concentration also 5mol / L. Turn on the metering pump to 10m 3 Pump the multi-component active defluoridation solution in the external circulation system into the supergravity separator at a speed of 5m / h 3 The hydrogen chloride gas stream containing fluorinated products is fed at a speed of / h and the hydrogen fluoride content of the inlet is sampled. The internal pressure of the supergravity separator is controlled to 1.3MPa, and the rotor speed is 300r / min. After the reaction, the multi-component active defluoridation solution returns to the external circulation system through the liquid outlet, the gas enters the gas cabinet, decompresses and removes water, controls the pressure of the gas cabinet to about 10kPa,...

Embodiment 3

[0047] Prepare a 0.1mol / L aluminum chloride solution in the external circulation system, and add calcium hydroxide to make the concentration 0.1mol / L. Prepare a 3mol / L aluminum chloride solution in the feeding system, and add calcium hydroxide at the same time to make the concentration also 3mol / L. Turn on the metering pump to 10m 3 Pump the multi-component active defluoridation solution in the external circulation system into the supergravity separator at a speed of 5m / h 3 The hydrogen chloride gas stream containing fluorinated products is fed at a speed of / h and the hydrogen fluoride content of the inlet is sampled. The internal pressure of the supergravity separator is controlled to 1.3MPa, and the rotor speed is 300r / min. After the reaction, the multi-component active defluoridation solution returns to the external circulation system through the liquid outlet, the gas enters the gas cabinet, decompresses and removes water, controls the pressure of the gas cabinet to abou...

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Abstract

The invention provides a reaction system for removing hydrogen fluoride in hydrogen chloride. The system comprises a supergravity separator, an outer circulation system, a gas holder, a material supplementing system and an absorption tower, according to the invention, the supergravity separator is applied to removal of hydrogen fluoride in hydrogen chloride, so that the gas-liquid contact is moresufficient and the removal rate of hydrogen fluoride is improved, a three-stage isolation system is used in an external circulation system, so that the influence of the precipitation of metal fluoridesalt on a feeding pump is avoided, the components of the fluorine removal agent can be maintained at the lowest limit value by adopting a regular monitoring and supplementing system, and the fluorineremoval effect is effectively improved, after the pressure is released through the gas holder, moisture carried by the gas after the gas is in contact with the fluorine removal agent can be effectively removed, and desorption and regeneration of the absorption tower are facilitated. According to the system, hydrogen fluoride is removed and adsorbed in a graded mode, hydrogen fluoride with different concentrations can be effectively removed, and the application range is wider.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a reaction system for removing hydrogen fluoride from hydrogen chloride. Background technique [0002] Common methods for introducing fluorine atoms include: addition reaction, substitution reaction, electrochemical reaction, telomerization reaction, etc. In the refrigerant and foaming industry, the most mature process for introducing fluorine atoms is to replace chlorinated hydrocarbons with hydrogen fluoride to produce fluorinated alkanes. In the production process of this process, the method of excessive hydrogen fluoride is usually used to reduce the content of by-products, so there is a phenomenon that hydrogen fluoride is entrained with the reaction products and by-product hydrogen chloride, which must be processed in the subsequent process of the reaction. The industry generally adopts the method of washing with water and alkali for treatment, thus producing a large amoun...

Claims

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Application Information

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IPC IPC(8): C01B7/07
CPCC01B7/0706
Inventor 赵恒军童绍丰丛鑫鑫陈朝阳符仁华
Owner JIANGSU SANMEI CHEM
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