Patent ID: 8864961
Filing Date: 2014-10-21
Classification: C01B,C25B,F17C,Y02E

Abstract:
1. A fluorine gas generating apparatus which generates a fluorine gas by electrolyzing hydrogen fluoride in molten salt, comprising: an electrolytic cell in which the molten salt is retained and which is separated and divided above the liquid level of the molten salt into a first gas chamber into which a product gas mainly containing a fluorine gas generated at an anode immersed in the molten salt is led and a second gas chamber into which a byproduct gas mainly containing a hydrogen gas generated at a cathode immersed in the molten salt is led; and a refining device which refines the fluorine gas by coagulating with a cooling medium and trapping a hydrogen fluoride gas evaporated from the molten salt in the electrolytic cell and mixed in the product gas generated from the anode, wherein the refining device includes a buffer tank which recovers and temporarily stores cooling medium gas and liquid cooling medium used for coagulation of the hydrogen fluoride gas and discharged, wherein the refining device includes a pressure meter which detects an internal pressure of the buffer tank, and a pressure control valve which controls the internal pressure of the buffer tank, and wherein the cooling medium gas stored in the buffer tank is re-used as a utility gas used at spots in the fluorine gas generating apparatus.