1 Catalytic Synthesis method
In the reaction system of graphite and fluorine, if trace amounts of metal fluoride such as Lif, MgF2, AlF3 and CuF2 exist, it can also synthesize fluorinated graphite under 300T condition. Metal fluoride plays a catalytic role here. In the production of fluorine fossil inks, contain traces of metal fluoride. Although the quantity is tiny, the properties of fluorinated graphite are changed, especially the conductivity is increased by a order of magnitude. The equipment used is the same as the direct synthesis method. However, the requirements for the purity of raw materials used are relatively high. The carbon content of natural graphite requires more than 99.4%; the purity of fluorine gas is 99.4~99.7%, and the N2 content is less than 0.3~0.6% and 1^ is less than 0.01%;(: 1^2 purity requirements greater than 98%, A1F3 purity requirements greater than 98%.
2. Solid and Solid synthesis method
The first two methods are solid graphite and gas fluorine synthesis, gas fluorine is very toxic substances, highly corrosive, at high temperature reaction, production is unsafe. In Japan, a mixture of solid fluorine-containing polymers and graphite was developed, and in inert gases, the graphite was heated to 650T. This synthesis method provides good conditions for the production of fluorinated graphite, and the synthesis reaction is carried out in the quartz tube of the tubular furnace.
3. Vertical Vibration Reactor Synthesis method
At the bottom of the nickel reactor, a vibrator is added, on the one hand, the reaction material is mixed evenly, and the reaction speed can be improved, and the yield and product quality can be improved. ‘ Compared with rotary reactors, a step forward is made in the control of process conditions.
4. Electrolysis method
A new fluorinated graphite can be produced by electrolysis of carbon or graphite materials in anhydrous hydrofluoric acid. Specifically, the hydrofluoric acid cycle between the anode and the cathode allows for continuous synthesis of fluorinated graphite. This method is accomplished in a circulating electrolytic device. The electrolysis process is carried out by controlling the concentration of the reaction solution, the reaction temperature and the amount of the conductive agent.
