Patent ID: 6342194
Filing Date: 2002-01-29
Classification: B01D,B01J

Abstract:
A process for treating NF3, comprising the following steps:preparing a first reactor including an outer tube, agitator blades for agitating gas in the first reactor and generating a flow of the gas, and a gas flow guide tube for efficiently circulating and dispersing the gas flow generated by the agitator blades, said gas flow guide tube being disposed inside said outer tube so as to form an inner space inside said gas flow guide tube and an outer space between the said gas flow guide tube and said outer tube: stationarily placing at least one substance selected from the group consisting of a metal and a metal compound within the inner space of said first reactor, the metal being at least one metal selected from the group consisting of Si, B, W, Mo, V, Se, Te and Ge, the metal compound being at least one metal compound selected from the group consisting of solid compounds of Si, B, W, Mo, V, Se, Te and Ge; heating the inside of said first reactor to a temperature ranging from 400Â° to 900Â° C.: introducing a gas containing NF3 into the first reactor; operating said agitator blades to generate a flow of the gas containing NF3; circulating the gas containing NF3 through the inner and outer spaces in said first reactor to promote reaction of gas containing NF3 with at least one substance of the metal and the metal compound, thereby forming a fluoride gas; and capturing the fluoride gas.