An Electrochemical Fluorination External Circulation Electrolysis System

Abstract

The invention provides an electrochemical fluorination external circulation electrolysis system, comprising an electrolytic cell, an anode cooler, an anode gas-liquid separator, a total cooler, an anode condenser, a cathode cooler, a cathode gas-liquid separator and a cathode condenser The anolyte outlet of the electrolytic cell is connected to the liquid inlet of the anode cooler by means of pipes, and the liquid outlet of the anode cooler is connected to the liquid inlet of the upper part of the anode gas-liquid separator by means of pipes; the bottom of the anode gas-liquid separator The liquid outlet of the total cooler is connected with the liquid inlet at the top of the total cooler by means of pipes, and the liquid outlet at the bottom of the total cooler is connected with the liquid inlet of the electrolytic cell by means of pipes. The invention facilitates the miniaturization of the electrolytic cell, can eliminate the risk of inter-connection of refrigerants and electrolytes and the mixed explosion of yin and yang gases, significantly improves the energy efficiency ratio of the electrolytic cell, is safe and reliable, the heat management is completed by the cooler, and the electrolysis temperature can be accurately controlled. Liquid separation can fully obtain high-purity product gas.

Description

technical field [0001] The invention belongs to the field of electrochemical fluorination, relates to an electrolysis system, in particular to an electrochemical fluorination external circulation electrolysis system. Background technique [0002] Compound fluorination can be accomplished by synthetic chemical reaction or electrolysis. Chemical synthesis fluorination has low conversion rate, severe reaction, difficult process control, high safety risk, and many purification steps. Electrochemical fluorination is the use of electrode reactions to introduce fluorine atoms into organic or An effective route for inorganic substances, with high conversion rate and mild reaction. At present, fluorination reactions such as nitrogen trifluoride and perfluorosulfonyl fluoride are all completed by electrochemical fluorination processes. [0003] The electrochemical fluorination system was invented by American chemist Simons in 1941. In 1946, 3M Company of the United States began to ap...

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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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