Electrochemistry fluorination electrolytic bath

Abstract

The invention discloses an electrochemistry fluorination electrolytic bath. The electrochemistry fluorination electrolytic bath comprises a bath body (1), a bath cover (2), a bath body side wall temperature control clamping sleeve (3), a bottom discharge valve (4), electrode sets (5), anode conductive rods (6), cathode conductive rods (7) and a conductive cross beam (8). Each electrode set is structurally characterized in that plate electrodes are fixed with fixing shafts (15) penetrating plate electrode center holes (19), the interval between the plate electrodes is controlled by annular insulation pads (17), and the fixing shafts fix the plate electrodes into one electrode set through insulation nuts (16) at the two ends. The conductive cross beam is of a hollow-out structure, electrode screw rods (20) on the plate electrodes penetrate through the hollow-out structure to be fixed on the conductive cross beam, and the conductive cross beam and the bath cover (2) are assembled together through the anode conductive rods (6) and the cathode conductive rods (7). The electrochemistry fluorination electrolytic bath has the advantages of being large in capacity, high in space utilization rate, large in effective electrolytic area and the like. The plate electrodes are movably connected with the conductive cross beam, dismounting is convenient, and assembly is easy.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an electrochemical fluorination electrolytic cell. Background technique [0002] The electrolytic fluorination method, also known as the Simons method, uses nickel as the anode, nickel or iron as the cathode, dissolves the organic reactant in anhydrous hydrogen fluoride to form a conductive electrolyte, and controls the voltage at a lower temperature to 4.5-6.0V , a method of introducing fluorine into organic molecules by anodic electrochemical fluorination. Electrolytic fluorination is currently widely used in the preparation of perfluorinated compounds. [0003] In the prior art, the Simons type electrolyzer mostly adopts a cylindrical electrolytic kettle with an electrode stack structure, and the electrolyte between the electrodes circulates by natural force during the electrolysis process, in which there is exchange of cold and heat, rising of gas and liquid The drop supplem...

AI Technical Summary

Problems solved by technology

[0004] Since the electrode stack is mostly square, the cylindrical electrolytic kettle has disadvantages such as low space utilization rate in the kettle and small effective electrolysis area.

During the process of electrolytic fluorination, organic matter breakage and carbonization reactions occur on the surface of the electrode, and solid residues are deposited on the bottom of the electrolytic cell, which may easily lead to blockage of the discharge port at the bottom

The corrosion of the plate and the deposition of solid residues hinder the progress of electrolysis, resulting in a gradual decline in electrolysis efficiency. The electrolysis process needs to be dismantled and inspected regularly, and the surface of the electrode must be polished to ensure that the surface of the electrode is clean

At present, most of the electrode plates are connected by fixed connections, and the electrode plates cannot be disassembled in a single piece. Since the distance between the electrode plates required by the electrolytic fluorination process is very small, it is often necessary to cut off the electrode plates and then weld them during the dismantling process, which is time-consuming and laborious.

[0005] In the prior art, the electrode plate spacing of each electrode group is fixed, but different electrolytic raw materials have different requirements for the electrode plate spacing. To produce different products, different electrode plate spacing needs to be adjusted. In the prior art, the electrode set must be replaced as a whole. The slot is labor intensive

Images