Amine and diamine compounds and their use for inverse froth flotation of silicate from iron ore

Patent metadata

Field	Value
Publication number	US-9561512-B2
Application number	US-201214110646-A
Country	US
Kind code	B2
Filing date	Apr 10, 2012
Priority date	Apr 13, 2011
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

Compounds of the formulae: RO—X—NH 2 (Ia); RO—X—NH 3 + Y − (Ib); RO—X—NH—Z—NH 2 (IIa); and RO—X—NH—Z—NH 3 + Y − (IIb), in which X is an aliphatic alkylene group containing 2 to 6 carbon atoms; Z is an aliphatic alkylene group containing 2 to 6 carbon atoms; Y − is an anion; and R is an aliphatic iso C 13 H 27 -group with average branching degree ranging from 1.5 to 3.5. The compounds are particularly suitable as flotation collectors for enriching an iron mineral from a silicate-containing iron ore.

First claim

The invention claimed is:

1. A process for enriching an iron mineral from a silicate-containing iron ore, the process comprising:
performing inverse flotation with a collector or collector formulation comprising at least one compound of any of formulae (Ia), (Ib), (IIa) and (IIb), to at least partially separate a silicate-containing mineral from the silicate-containing iron ore and provide an iron-enriched mineral:
RO—X—NH 2   (Ia);

RO—X—NH 3 + Y −   (Ib);

RO—X—NH—Z—NH 2   (IIa); and

RO—X—NH—Z—NH 3 + Y −   (IIb),

wherein
X is an aliphatic alkylene group containing 2 to 6 carbon atoms;
Z is an aliphatic alkylene group containing 2 to 6 carbon atoms;
Y − is an anion; and
R is an aliphatic iso C 13 H 27 -group with an average branching degree ranging from 2.0 to 2.5.

2. The process according to claim 1 ,
wherein at least one of X and Z is a linear or branched alkylene group.

3. The process according to claim 2 ,
wherein at least one of X and Z is a —CH 2 CH 2 CH 2 — moiety.

4. The process according to claim 1 ,
wherein Y − of the compounds of formulae:
RO—X—NH 3 + Y −   (Ib); and

RO—X—NH—Z—NH 3 + Y −   (IIb),

is CH 3 CO 2 − .

5. The process according to claim 1 ,
wherein the collector or collector formulation comprises at least one compound selected from the group consisting of compounds of formulae (Ia) and (Ib) in combination with at least one compound selected from the group consisting of compounds of formulae (IIa) and (IIb).

6. The process according to claim 1 , further comprising performing froth flotation.

7. The process according to claim 1 , further comprising employing an additional frother.

8. The process according to claim 7 ,
wherein the additional frother is either a branched aliphatic alcohol with 10 or less carbon atoms; and/or an alkyl ethoxylate.

9. The process according to claim 1 ,
wherein the iron ore is haematite.

10. The process according to claim 1 , further comprising adding a depressant.

11. The process according to claim 10 ,
wherein the depressant is a starch.

12. The process according to claim 1 , wherein R has an average degree of branching from 2.0 to 2.4.

13. The process according to claim 1 , wherein the inverse flotation is carried out at a pH of from 9.8 to 10.7.

14. The process according to claim 1 , wherein the collector or collector formulation further comprises 20-50% by weight of acetic acid.

15. The process according to claim 1 , wherein the inverse flotation comprises five froth steps.

Assignees

• Bittner Christian
• Vacano Bernhard Ulrich Von
• Berger Alexsandro
• Boehn Roland
• Oetter Guenter
• Nieberle Joerg
• Basf Se

Inventors

• Bittner Christian
• Vacano Bernhard Ulrich Von
• Berger Alexsandro
• Boehn Roland
• Oetter Guenter
• Nieberle Joerg

Classifications

• B03D1/01 Primary

  containing nitrogen · CPC title

• B03D2201/02

  Collectors · CPC title

• B03D1/016

  Macromolecular compounds · CPC title

• B03D2201/04

  Frothers · CPC title

• B03D2201/06

  Depressants · CPC title