Patent ID: 6183713
Filing Date: 2001-02-06
Classification: C01B

Abstract:
A method for producing nitrogen trifluoride, said method comprising:providing a vessel filled with a particulate solid of an ammonium complex of a metal fluoride;introducing a fluorine-containing gas into said vessel to allow said fluorine-containing gas to flow upwardly through said vessel such that said fluorine-containing gas has an upward superficial velocity through said vessel of not less than 1 cm/s, wherein the superficial velocity is defined as O/A where Q is the volume of said fluorine-containing gas introduced into said vessel per unit amount of time at 25.degree. C. and 1 atmosphere and A is the cross-sectional area of said vessel perpendicular to the flow of said fluorine-containing gas through said vessel, andagitating said particulate solid during said introducing,such that fluorine of said fluorine-containing gas is reacted with said particulate solid in said vessel, thereby to obtain a reaction gas containing nitrogen trifluoride; andseparating said nitrogen trifluoride from said reaction gas.