Process for selective flotation of phosphorus minerals
AssigneeHoechst Aktiengesellschaft
InventorsJens M. Krause, Kurt Bauer
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Abstract
The invention relates to a process for the selective flotation of phosphorus minerals, in which process the flotation collectors used are one or more compounds of the formula 1a and/or 1b ##STR1## wherein R.sup.1 is a branched or straight-chain C.sub.8 -C.sub.24 -, in particular C.sub.8 -C.sub.18 -alkenyl, R.sup.2 is a branched, straight-chain or cyclic alkyl having 5 and/or 6 carbon atoms and M is hydrogen, an alkali metal or alkaline earth metal, ammonium or NR.sup.3 R.sup.4 R.sup.5 where R.sup.3, R.sup.4 and R.sup.5 independently of one another are hydrogen, C.sub.1 -C.sub.20 -alkyl or C.sub.1 -C.sub.20 -hydroxyalkyl, optionally as a mixture or combination with co-collectors.
Claims12
A process for the selective flotation of phosphorus minerals, which comprises subjecting a suspension containing said phosphorus minerals to flotation in the presence of at least one flotation collector, in which process the flotation collectors used are one or more compounds of the formula 1a and/or 1b ##STR5## wherein R.sup.1 is a branched or straight-chain C.sub.8 -C.sub.24 -alkenyl,
- R.sup.2 is a branched, straight-chain or cyclic alkyl having, independently, in each occurrence, 5 or 6 carbon atoms and
- M is hydrogen, an alkali metal or alkaline earth metal, ammonium or NR.sup.3 R.sup.4 R.sup.5 where R.sup.3, R.sup.4 and R.sup.5 independently of one another are hydrogen, C.sub.1 -C.sub.20 -alkyl or C.sub.1 -C.sub.20 -hydroxyalkyl,
- optionally as a mixture or combination with co-collectors.
The process as claimed in 5, wherein the flotation collector or the mixture or combination contains up to 10% by weight of olefins of the chain length of R.sup.1.
Dependencies are inferred from the claim text.