FLUORINE GENERATION TECHNOLOGY Russian patent published in 2003 - IPC

FIELD: production of fluorine. SUBSTANCE: invention refers, in particular, to winning of melts of acidic calcium fluoride utilized in average temperature method of fluorine electrolysis. Fluorine is generated by electrolysis across carbon anode from melt of potassium trifluoride. Electrolysis is conducted with current density across anode 0.4 A/sq cm with content of hydrogen fluoride in electrolyte amounting to 39.2-40.4 per cent by weight and electrolyte temperature of 106-112 C. Technical effect lies in solving of problem of maintaining of optimum content of hydrogen fluoride in electrolyte at corresponding temperature which ensures maximum ionic conductivity and decreases or excludes electron conductivity of melt. EFFECT: provision for maximum ionic conductivity and decrease or exclusion of electron conductivity of melt. 4 tbl