PROCESS FOR PREPARING FLUORINE ELECTROLYTICALLY

摘要

1303389 Producing fluorine electrolytically SCC DES USINES CHIMIQUES DE PIERRELATTE 19 April 1971 [12 March 1970] 23513/71 Heading C7B Fluorine containing less than 6% by volume of HF is produced by electrolyzing an anhydrous NH 3 and HF mixture fed with HF to maintain the NH 3 content of the bath between 17À5% and 20À5% by weight (corresponding to NH 4 F, 3-2À3 HF molar) at between 0 and 50‹C. and at least 6 volts in the absence of air. A quarter or less of the total molar NH 4 F content may be replaced mole for mole by at least one alkali metal fluoride; e.g. the HF bath may contain by weight 14% NH 3 and 15% KF. Electrolysis may be effected in a water cooled double-walled steel tank having a central C anode separated from 2 steel cathodes by diaphragms of "Monel" (Registered Trade Mark) metal wire grid.