C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/00 (2006.01) C22B 15/00 (2006.01)
Patent
CA 2644671
The present invention relates to a process for the acid digestion of metal-containing compounds by leaching by means of an aqueous leachant, wherein the aqueous leachant i) contains an alkanesulphonic acid and, if appropriate, sulphuric acid and/or surfactant and/or ii) a mixture of an alkanesulphonic acid salt and sulphuric acid and also, if appropriate, surfactant. Furthermore, an aqueous leachant containing one or more alkanesulphonic acids and, if appropriate, sulphuric acid and/or surfactant and also an aqueous leachant containing one or more alkanesulphonic acid salts and sulphuric acid and, if appropriate, surfactant are also provided by the present invention.
La présente invention concerne un procédé de dissolution acide de composés qui contiennent des métaux, par lixiviation au moyen d'un agent aqueux de lixiviation. L'agent aqueux de lixiviation contient (i) un acide alcanesulfonique et éventuellement de l'acide sulfurique et/ou un agent tensioactif et/ou (ii) un mélange constitué d'un sel d'acide alcanesulfonique et d'acide sulfurique ainsi qu'éventuellement un agent tensioactif. En outre, la présente invention concerne egalement un agent de lixiviation aqueux qui contient un ou plusieurs acides alcanesulfoniques et éventuellement de l'acide sulfurique et/ou un agent tensioactif ainsi qu'un agent de lixiviation aqueux qui contient un ou plusieurs sels d'acide alcanesulfonique et de l'acide sulfurique ainsi qu'éventuellement un agent tensioactif.
Heidenfelder Thomas
Laubusch Bernd
Seelmann-Eggebert Hans-Peter
Witteler Helmut
Basf Se
Robic
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