Method for producing fluorine

Details Method for producing fluorine Method for producing fluorine

1980-06-20

1982-01-26

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

204294, C25B 124

Patent

active

043127185

ABSTRACT:
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 unfavorable 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.

REFERENCES:
patent: 3442787 (1969-05-01), Landrum et al.
patent: 4226900 (1980-10-01), Carlson et al.
Pinkston, "Preparation of Fluorine", Ind. & Engineering Chem., vol. 39, No. 3 (Mar. 1947) pp. 255-258.

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