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Article | REF: J6325 V1

Fluorine

Author: François NICOLAS

Publication date: June 10, 2002

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1. Process

1.1 Principle

Fluorine is prepared by electrolysis of anhydrous hydrogen fluoride, made conductive by the addition of a metal fluoride. Industrial producers use molten salt with a composition close to KF, 2 HF at a temperature of between 85 and 105 ˚C.

In this medium, hydrogen fluoride decomposes at a minimum potential of 2.9 V according to the reaction : 2 HF (l)→H2 (g )+F2 (g )

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