Use of hydrophobically associating copolymers as binders for pelletizing metal containing ores

Patent metadata

Field	Value
Publication number	US-2019010577-A1
Application number	US-201615754325-A
Country	US
Kind code	A1
Filing date	Sep 1, 2016
Priority date	Sep 2, 2015
Publication date	Jan 10, 2019
Grant date	—

Abstract

The present invention relates to the use of hydrophobically associative copolymers as binders for pelletizing metal containing ores such as iron containing ores. The copolymers comprise monomer unitsderived from at least one hydrophobically as sociative monomer, preferably at least one unsaturated hydrophobically associating monomer.

First claim

1 . A process, comprising pelletizing a metal containing ore in contact with Use of a hydrophobically associating copolymer.

2 . The process according to claim 1 , wherein the hydrophobically associating copolymer comprises monomer units derived from at least one unsaturated hydrophobically associating monomer C.

3 . The process according to claim 2 , wherein the at least one monomer C is a monomer of the general formula (I), formula (III), formula (IV), formula (V) or (VI);
H 2 C═C(R 1 )—R 2 —O—(—CH 2 —CH 2 —O—) k —(—CH(R 5 )—CH(R 3 )—O—) l —(—CH 2 —CH 2 —O—) m —R 4   (I)
H 2 C═C(R 1 )—(C═O)—O—(—CH 2 —CH(R 5′ )—O—) k —R 6   (III)
H 2 C═C(R 1 )—(C═O)—O—R 6   (IV)

wherein
k: is a number from 10 to 150, preferably from 20 to 30;
l: is a number from 5 to 20;
m: is a number from 0 to 30;
R 1 : is H or methyl;
R 2 : is independently a single bond or a divalent linking group selected from the group consisting of —(CH 2 ) n — and —O—(CH 2 ) n′ —, where n is a natural number from 1 to 6 and n′ is a natural number from 2 to 6;
R 3 and R 5 : are each independently hydrogen or a hydrocarbyl radical having 1- to 6 carbon atoms or an ether group of the general formula —CH 2 —O—R 3′ where R 3′ is a hydrocarbyl radical having at least 2 carbon atoms; with the proviso that the sum total of the carbon atoms in all hydrocarbyl radicals R 3 or R 3 ′ and R 5 is in the range from 10 to 50; and
R 4 : is independently H or a hydrocarbyl radical having 1 to 4 carbon atoms;
R 5′ : is independently H, methyl or ethyl;
R 6 : is independently an aliphatic and/or aromatic, straight-chain or branched hydrocarbyl radical having 8 to 40 carbon atoms;
R A , R B , R C , R D , R E , R F , R a , R b , R c : are each independently hydrogen or a hydrocarbyl radical containing 1 to 4 carbon atoms;
Q: is a hydrocarbyl radical containing 1 to 8 carbon atoms;
R G : is a hydrocarbyl radical containing 8 to 30 atoms;
R d : is a saturated or unsaturated alkyl containing 4 to 18 carbon atoms;
X: is a counterion with a negative charge; and
G: is —O— or —NH—.

4 . The process according to claim 3 , wherein the at least one monomer C is a monomer of the general formula (I), wherein:
k: is a number from 23 to 26; l: is a number from 8.5 to 17.25; and m: is a number from 0 to 15.

5 . The process according to claim 3 , wherein the at least one monomer C is a monomer of the general formula (I) which is a mixture of at least one monomer C of the formula (I) wherein m=0, and at least one monomer C of the formula (I) wherein m=1 to 15.

6 . The process according to claim 5 , wherein the weight ratio of the at least one monomer C of the formula (I), wherein m=0, and the at least one monomer C of the formula (I) wherein m=1 to 15 is in the range from 19:1 to 1:19.

7 . The process according to claim 1 , wherein the hydrophobically associating copolymer further comprises monomer units derived from at least one anionic monoethylenically unsaturated, hydrophilic monomer A.

8 . The process according to claim 7 , wherein the at least one monomer A comprises at least one group selected from the group consisting of —COOH, —SO 3 H, —PO 3 H 2 , salts thereof and mixtures of any of the foregoing.

9 . The process according to claim 8 , wherein the at least one monomer A is 2-acrylamido-2-methyl-propane sulfonic acid (AMPS) or a salt thereof.

10 . The process according to claim 2 , wherein the hydrophobically associating copolymer further comprises monomer units derived from at least one uncharged, monoethylenically unsaturated hydrophilic monomer B.

11 . The process according to claim 1 , wherein the hydrophobically associating copolymer comprises monomer units derived from:
i. at least one anionic monoethylenically unsaturated, hydrophilic monomer A; ii. at least one uncharged, monoethylenically unsaturated hydrophilic monomer B; and iii. at least one unsaturated, hydrophobically associating monomer C.

12 . The process according to claim 10 , wherein the at least one monomer B is selected from the group consisting of acrylamide, methacrylamide, N-methyl methacrylamide, N-methyl acrylamide, N,N′-dimethyl acrylamide, N,N′-dimethyl methacrylamide, N-methylol acrylamide, N-methylolmethacrylamide, uncharged vinylamides or mixtures thereof.

13 . The process according to claim 2 , wherein the copolymer comprises about 0.1 to about 15% by wt. of the at least one monomer C.

14 . The process according to claim 11 , wherein the copolymer comprises about 2% by wt. of the at least one monomer C, about 48% by wt. of the at least one monomer A and about 50% by wt. the at least one monomer B.

15 . The process according to claim 1 , wherein the copolymer has been made by polymerisation of the monomer blend in the presence of at least one branching agent.

16 . The process according to claim 1 , claims 1 to 15 , wherein the molecular weight of the copolymer is at least 300,000 Da.

17 . The process according to claim 1 , wherein the copolymer is water-soluble.

18 . The process according to claim 3 , wherein the copolymer does not comprise monomers derived from monomers C of formula (V) or (VI).

19 . The process according to claim 1 , wherein the metal containing ore is selected from the group consisting of an Fe containing ore, a Cu containing ore, a Mo containing ore, a Ni containing ore, a Cr containing ore, and mixtures thereof.

20 . A composition for metal containing ore pelletizing,. the composition comprising:
(i) a hydrophobically associating copolymer; and (ii) a pelletisation aid, a water soluble treatment polymer, or both, wherein: the pelletizing aid is a water soluble material selected from the group consisting of sodium carbonate, sodium bicarbonate, sodium silicate, sodium phosphate, sodium stearate, sodium benzoate, sodium tartrate, sodium oxalate, sodium citrate, sodium acetate, the corresponding ammonium, potassium, calcium and magnesium salts of the preceding sodium salts, urea and calcium oxide; and the water soluble treatment polymer has molecular weight of from about 1,000 to about 20,000 and is a synthetic polymer formed by polymerisation of water soluble ethylenically unsaturated anionic monomer or water soluble ethylenically unsaturated monomer blend containing at least 50% by weight anionic monomer.

Assignees

• Basf Se

Inventors

• Villanueva Berindoague Adrian Mauricio
• Michailovski Alexej
• Brodt Gregor
• Von Krog Sylvia
• Bechen Dominic Rene
• Packe-Wirth Rainer
• Hoff Shane

Classifications

• C22B1/244 Primary

  organic · CPC title

• C22B1/00

  Preliminary treatment of ores or scrap · CPC title

• C09J133/26

  Homopolymers or copolymers of acrylamide or methacrylamide · CPC title

• C22B1/2406

  pelletizing · CPC title

• C08F216/145

  Monomers containing side chains of polyethylene-co-propylene oxide groups · CPC title