申请人:BASF SE
公开号:US20220212204A1
公开(公告)日:2022-07-07
The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I wherein R
1
is C
9
-C
22
alkyl or alkenyl, which is linear or branched, R
2
is H, C
1
-C
4
alkyl, which is linear or branched, R
3
is —X—NH
2
, H or C
1
-C
4
alkyl, which is linear or branched, and X is C
2
-C
4
alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula 1-X wherein R
1
is C
9
-C
15
alkyl, which is linear or branched, R
2
is H, R
3
is —X—NH
2
and X is C
2
-C
4
alkylene, which is linear or branched, is disclosed.