Hi @Beton2
I had collected a whole heap of these. You got most of them. Could add these.
http://zh.scientific.net/AMR.524-527.2011
http://www.directorypatent.com/C2N/201110358932.html
But your last one, I think, covers it best:
https://patentscope.wipo.int/search...)&prevFilter=&sortOption=Relevance&maxRec=832
The devil will be in the Sileach detail, i.e. what their flowsheet is in respect to their claims - especially with impurity removal (the patent wont just be leach but everything in between and they will need to demonstrate innovation). That said, I would put money on Sileach not seeing the light of day, not to mention not being anywhere near the aspirational production cost targets they promote.
Next Move, page-63
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