That is an analytical process used for assay work in the lab.
Go look for a commercial extractive process economic for a couple of hundred tonnes a day.
Please report back, we are interested, and I am sure it is done. Thanks.
"Tantalum was separated from the rest of the mineral matrix by solvent extraction using methyl isoamyl ketone.
The analytical results indicated that 98.9(9)% Ta2O5 was recovered from the organic portion while 101.6(3)% Nb2O5 and the rest of the elements were recovered from the aqueous solution."
That is an analytical process used for assay work in the lab.Go...
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