Studies on Fluorine at Low Temperature. I. Production, Analysis and Methods of Handlings of Fluorine

Electrochemistry—I

“…Produced by electrolysis of the salt 2HF-KF. 145 • 146 The purification of fluorine from the oxygen it contains is carried out by selective adsorption on active charcoal, 147 by passing through a nickel tube at 300°C, and by distillation (8E = -188.0°C) at liquid nitrogen temperature. When HF is the only contaminant, it is possible to reduce the content to a fraction of 1% by passing over sodium fluoride.…”