USE OF A KMGF3 COMPOUND FOR TRAPPING METALS IN THE FORM OF FLUORIDES AND/OR OXYFLUORIDES IN A GASEOUS OR A LIQUID PHASE

摘要

The invention relates to the use of a compound having the formula KMgF3 to trap metals in the form of fluorides and/or oxyfluorides in a gaseous or liquid phase. The invention also relates to a compound having the formula KMgF3 and a specific surface area that is at least equal to 30 m2/g and at most equal to 150 m2/g, as well as to the methods for preparing same. The invention can be used in particular in the nuclear industry, in which it can be advantageously used to purify uranium hexafluoride (UF6) in a stream of gas or liquid with respect to metal impurities also in said stream.