NITROGEN TRIFLUORIDE PRODUCTION PROCESS Russian patent published in 2006 - IPC C01B21/83 C25B1/24 C25B9/00 

FIELD: inorganic compounds technology.

SUBSTANCE: process comprises electrolysis of ammonium fluoride melts in electrolyzer with carbon or nickel anodes and steel cathodes provided with anode bell, said process being characterized by that electrolyzer contains louver cathodes and anode bell is arranged above electrodes. In this case, electrolyte mirror area under the bell constitutes not more than 0.2 total area electrolyte mirror, bell dipping depth in electrolyte is at least 0.25 electrode height, cathode-bell distance is at least 0.025 electrode height, anode-bell distance is at least 0.025 electrode height in case of carbon anode and 0.05 electrode height in case of nickel anode, predetermined electrolyte level in electrolyzer is maintained by feeding hydrofluoric acid gas while ammonia gas is supplied continuously, ammonia supply velocity being varied depending on content NF₃ in anode gas and weight portion of ammonia in electrolyte is maintained equal to 24-28 wt %.

EFFECT: enabled production of NH₃ with less important fluctuation of yield during prolonged electrolysis (70-80% on carbon electrode and 70-75% on nickel electrode) and ensured explosion-proof production.

2 cl, 1 dwg, 2 tbl, 7 ex