Electrochemical fluorination external circulation electrolysis system

Abstract

The invention provides an electrochemical fluorination external circulation electrolysis system. The system comprises an electrolytic cell, an anode cooler, an anode gas-liquid separator, a main cooler, an anode condenser, a cathode cooler, a cathode gas-liquid separator and a cathode condenser. An anode liquid outlet of the electrolytic cell is connected with a liquid inlet of the anode cooler through a pipeline, and a liquid outlet of the anode cooler is connected with a liquid inlet in the upper portion of the anode gas-liquid separator through a pipeline. A liquid outlet in the bottom of the anode gas-liquid separator is connected with a liquid inlet in the top of the main cooler through a pipeline, and a liquid outlet in the bottom of the main cooler is connected with a liquid inlet of the electrolytic cell through a pipeline. The system facilitates miniaturization of the electrolytic cell, can eliminate the risks of refrigerant and electrolyte intermingling and negative and positive gas mixed explosion, obviously enhances the energy efficiency ratio of the electrolytic cell, is safe and reliable, finishes heat management by the coolers, can accurately control the electrolysistemperature, and can sufficiently obtain high-purity product gas through gas-liquid separation.

Description

technical field [0001] The invention belongs to the field of electrochemical fluorination and relates to an electrolysis system, in particular to an external circulation electrolysis system for electrochemical fluorination. Background technique [0002] The fluorination of compounds can be accomplished through synthetic chemical reactions or electrolysis. The conversion rate of chemical synthesis fluorination is low, the reaction is violent, the process is difficult to control, the safety risk is high, and there are many purification steps. Electrochemical fluorination is the use of electrode reactions to introduce fluorine atoms into organic or An effective way for inorganic substances, with high conversion rate and mild reaction. At present, the fluorination reactions of nitrogen trifluoride and perfluorosulfonyl fluoride are all completed by electrochemical fluorination process. [0003] The electrochemical fluorination system was invented by American chemist Simmons in ...

AI Technical Summary

Problems solved by technology

The fluorinating agent in electrolytic production usually uses hydrogen fluoride, and the electrolyte and hydrogen fluoride are mixed in a certain proportion to form the electrolyte. The current fluorination electrolysis system uses the Simmons fluorination electrolysis system. The electrolyte does not circulate and is stored in square or round containers. The electrode is inserted into the electrolyte, and the heat generated by the electrode reaction is taken out of the system through the refrigerant installed in the coil pipe inside the electrolytic cell, resulting in a large volume and low efficiency of the fluorinated electrolytic cell. The upper part of the tank is a gas phase space, which is easy to cause the cathode gas and anode gas to mix and explode

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