Method for producing bromine pentafluoride

A method for producing bromine pentafluoride, comprising:

• a reaction step of feeding a bromine-containing compound, the bromine-containing compound being at least one of a bromine gas and bromine trifluoride, and a fluorine gas to a reactor to give a (fluorine atom):
• (bromine atom) molar ratio, that is, F/Br of 3.0 or more and 4.7 or less and reacting the bromine-containing compound and the fluorine gas to each other to obtain a reaction mixture containing bromine pentafluoride and bromine trifluoride;
• and
• a separation step of separating bromine pentafluoride and bromine trifluoride in the reaction mixture from each other;
• wherein the separation step includes a cooling step of cooling and separating the reaction mixture into a gas component containing bromine pentafluoride and a liquid-solid component containing bromine trifluoride;
• and
• wherein the cooling step includes a first cooling step including cooling the reaction mixture in a temperature range of−20° C. or more to not more than a melting temperature of the bromine trifluoride to collect the bromine trifluoride, and a second cooling step including cooling the bromine pentafluoride in the reaction mixture in a temperature range of−80° C. or more to not more than melting temperature of the bromine pentafluoride to collect the bromine pentafluoride.