Fast masse for oppfanging av kvikksölv

摘要

A solid mass for trapping mercury, comprising a solid inorganic support or dispersant, essentially made of copper and sulphur, at least partly in the form of copper sulphide. The invention is characterised in that it is the product resulting from the following stages: a) at least one copper compound other than a sulphide is incorporated in a solid inorganic support or dispersant, b) the product obtained in stage (a) is calcined so as at least partly to convert the copper compound(s) which it contains into copper oxide (CuO and/or Cu2O), c) the product obtained in stage (b), or in stage (a) if there was no stage (b), is placed in contact with elemental sulphur, d) the product resulting from stage (c), called a precursor, is subjected to a heat treatment in a nonoxidising atmosphere, under gas purging, at a temperature and for a period which are sufficient to permit the formation of sulphide of the metal(s) present. e