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Method for preparing fluorine by electrolyzing potassium fluoride-hydrogen fluoride

A technology of hydrogen monofluoride and potassium fluoride, which is applied in the field of preparation of fluorine gas, and achieves the effects of simple preparation, convenient preparation and improved production efficiency

Inactive Publication Date: 2014-07-02
TIANJIN TAIHENG GASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is not only reasonable in process and simple in preparation, but also produces high-quality fluorine gas and solves the problem of rapid production of fluorine gas in small batches.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for preparing fluorine gas by electrolysis of potassium fluoride-hydrogen fluoride, characterized in that the molar ratio of potassium fluoride: hydrogen monofluoride: hydrofluoric acid is 1:1:1, and during the reaction at 70°C, the temperature and Voltage and current intensity, the voltage is 10 V, the current intensity is 4A, the reaction products are mainly fluorine gas and hydrogen gas; the wall of the electrolytic cell is used as the cathode, and the anode is made of thick nickel wire helical wire, and KF·2HF and Anhydrous HF; then cover the copper sheet of the electrolytic cell, and heat the material in the cell to 70°C, start from the upper part of the cylinder when heating with a lamp flame, and measure the temperature with a thermometer placed in a copper thermometer sleeve; when electrolytic When the material in the tank becomes liquid due to the formation of fusible KF·3HF, cover the cover of the cylinder and raise the temperature to 90°C; then carry ...

Embodiment 2

[0016] A method for preparing fluorine gas by electrolysis of potassium fluoride-hydrogen fluoride, characterized in that: the molar ratio of potassium fluoride: hydrogen monofluoride: hydrofluoric acid is 1: 2: 0.5, and during the reaction at 110°C, the temperature and Voltage and current intensity, the voltage is 10 V, the current intensity is 6A, the reaction products are mainly fluorine gas and hydrogen gas; the wall of the electrolytic cell is used as the cathode, and the anode is made of thick nickel wire helical wire, and KF·2HF and Anhydrous HF; then cover the copper sheet of the electrolytic cell, and heat the material in the cell to 70°C, start from the upper part of the cylinder when heating with a lamp flame, and measure the temperature with a thermometer placed in a copper thermometer sleeve; when electrolytic When the material in the tank becomes liquid due to the formation of fusible KF·3HF, cover the cover of the cylinder and raise the temperature to 90°C; then ...

Embodiment 3

[0018] A method for preparing fluorine gas by electrolysis of potassium fluoride-hydrogen fluoride, characterized in that the molar ratio of potassium fluoride: hydrogen monofluoride: hydrofluoric acid is 1:1:0.5, and during the reaction at 80°C, the temperature and Voltage and current intensity, the voltage is 10 V, the current intensity is 6A, the reaction products are mainly fluorine gas and hydrogen gas; the wall of the electrolytic cell is used as the cathode, and the anode is made of thick nickel wire helical wire, and KF·2HF and Anhydrous HF; then cover the copper sheet of the electrolytic cell, and heat the material in the cell to 70°C, start from the upper part of the cylinder when heating with a lamp flame, and measure the temperature with a thermometer placed in a copper thermometer sleeve; when electrolytic When the material in the tank becomes liquid due to the formation of fusible KF·3HF, cover the cover of the cylinder and raise the temperature to 90°C; then carr...

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Abstract

The invention discloses a method for preparing fluorine by electrolyzing potassium fluoride-hydrogen fluoride. The method is achieved at the temperature of 80-110 DEG C, wherein the wall of an electrolytic cell is taken as a cathode; an anode is prepared from a thick nickel wire spiral line; KF.2HF and anhydrous HF are added to the electrolytic cell, and then an electrolytic cell copper plate is covered; the material inside the cell is heated to 70 DEG C; the material is heated from the upper part of a drum when being heated by a light flame; the temperature is measured by a thermometer inside a copper thermometer sleeve; a lid on the drum is covered when the material inside the electrolytic cell becomes liquid due to easy-to-melt KF.3HF; the temperature ascends to 90 DEG C; then electrolysis is carried out; the voltage is 10V; and the current intensity is 4-6A. The method is reasonable in process, and simple to fabricate, and is the simplest and optimal method for preparing fluorine.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for preparing fluorine gas by electrolyzing potassium fluoride-hydrogen fluoride, which is suitable for timely supply of fluorine gas on site. Background technique [0002] Fluorine is one of the most widely distributed elements in nature. The content of fluorine in the earth's crust is 0.06%~0.07% (mass ratio), ranking the thirteenth in the element abundance table; the gas during volcanic eruptions generally also contains fluorine, and finally infiltrates into the soil; it is also present in natural water. Contains fluoride ions, the amount is generally 6.3mg / L; in river water, it is 0.05~0.5 mg / L; in seawater, the fluorine content is 1.4g / t, and this value increases with the increase of seawater depth. The largest can reach 1300 g / t; in organisms, the fluorine content is about 200 times less than that of the earth's crust. Even so, fluorine is still of great significance, be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/24
Inventor 李中元
Owner TIANJIN TAIHENG GASES
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