Method for producing fluorine

Details Method for producing fluorine Method for producing fluorine

C - Chemistry, Metallurgy

25

B

204/44

C25B 1/24 (2006.01) C04B 35/532 (2006.01) C25B 11/12 (2006.01)

Patent

CA 1153981

ABSTRACT OF THE DISCLOSURE The use of an isotropic carbon block having an anisotropy of not more than 1.2 in terms of an anisotropic ratio of specific resistance as an anode in the production of fluorine by the electrolysis of an electrolyte comprising a mixed molten salt system of potassium fluoride and hydrogen fluoride has been found to be extremely useful for attaining increase in critical current density so that occurrence of the un- desirable anode effect can be effectively prevented. With such an isotropic carbon block anode, even if the anode effect occurs, the electrolysis can be stably continued again by lowering the potential of the electrode. Further, the incorporation of a fluoride into the isotropic carbon block anode and/or the addition of a fluoride into the electrolyte is effective for further increasing critical current density.

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