Patent ID: 8142623
Filing Date: 2012-03-27
Classification: C25B

Abstract:
1. An electrolytic apparatus for producing fluorine or nitrogen trifluoride by electrolyzing a hydrogen fluoride-containing molten salt at an applied current density of from 1 to 1,000 A/dm 2 , which comprises: an electrolytic cell which is partitioned into an anode chamber and a cathode chamber by a partition wall, an anode which is disposed in said anode chamber, and a cathode which is disposed in said cathode chamber, said electrolytic cell having an inlet for feeding thereto a hydrogen fluoride-containing molten salt as an electrolysis liquid or a raw material for said hydrogen fluoride-containing molten salt, said anode chamber having an anode gas outlet for withdrawing gas from said electrolytic cell, said cathode chamber having a cathode gas outlet for withdrawing gas from said electrolytic cell, said anode comprising a conductive substrate and a coating layer formed on at least a part of the surface of said conductive substrate, wherein at least a surface portion of said conductive substrate is comprised of a conductive carbonaceous material, and wherein said coating layer is comprised of a conductive carbonaceous material having a diamond structure, wherein the ratio of the horizontal cross-sectional area of said cathode chamber to the horizontal cross-sectional area of said anode chamber is 2 or more.