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US 11,072,840 B2Granted
Use of hydrophobically associating copolymers as binders for pelletizing metal containing ores
AssigneeBASF SE
InventorsAdrian Mauricio Villanueva Berindoague, Alexej Michailovski, Gregor Brodt, Sylvia Von Krog, Dominic Rene Bechen, Rainer Packe-Wirth, Shane Hoff
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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 units derived from at least one hydrophobically as sociative monomer, preferably at least one unsaturated hydrophobically associating monomer.
Claims17
A process, comprising:
- pelletizing a metal comprising ore in contact with a hydrophobically associating copolymer,
- wherein the hydrophobically associating copolymer comprises, in polymerized form, a monomer (C) having a formula (I), formula (III), and/or (V):
- H2C═C(R1)—R2—O—(—CH2—CH2—O—)k—(—CH(R5)—CH(R3)—O—)l—CH2—CH2—O—)m—H (I),
- H2C═C(R1)—(C═O)—O—(—CH2—CH(R5)—O—)k—R6 (III), and/or
- wherein
- k is a number from 10 to 150;
- l is a number from 5 to 20;
- m is a number from 0 to 30;
- R1 is H or methyl;
- R2 is a single bond or a divalent linking group of formula —(CH2)n— and —O—(CH2)n′—, n being a natural number from 1 to 6 and n′ being a natural number from 2 to 6;
- R3 and R5 are independently H, a hydrocarbyl radical comprising 1 to 6 carbon atoms, or an ether group of formula —CH2—O—R3′, R3′ being a hydrocarbyl radical comprising at least 2 carbon atoms;
- R5′ is H, methyl or ethyl;
- R6 is a hydrocarbyl radical comprising 8 to 40 carbon atoms;
- RA, RB, RC, RD, RE, RF are independently H or a hydrocarbyl radical comprising 1 to 4 carbon atoms;
- Q is a hydrocarbylene radical comprising 1 to 8 carbon atoms;
- X is a counterion with a negative charge;
- and
- RG is a hydrocarbyl radical comprising 8 to 30 atoms,
- wherein a sum total of carbon atoms in all hydrocarbyl radicals R3 or R3′ and R5 is in a range from 10 to 50,
- wherein the monomer (C) has the formula (I) and is a mixture comprising a first monomer C of the formula (I) wherein m is 0 and a second monomer (C) of the formula (I) wherein m is in the range of from 1 to 15, and
- wherein the weight ratio of the first to second monomer (C) of the formula (I) is in the range from 19:1 to 1:19.
18 more elements
A composition suitable for pelletizing a metal comprising ore, the composition comprising:
- (i) a hydrophobically associating copolymer;
- and
- (ii) a pelletization aid and/or a water soluble treatment polymer,
- wherein the pelletization aid is a water soluble material comprising 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/or calcium oxide, and
- wherein the water soluble treatment polymer has molecular weight of from about 1,000 to about 20,000 and is a synthetic polymer formed by polymerization of water soluble ethylenically unsaturated anionic monomer or water soluble ethylenically unsaturated monomer blend comprising at least 50% by weight anionic monomer,
- wherein the hydrophobically associating copolymer comprises, in polymerized form, a first and a second monomer (C) independently having a formula (I):
- H2C═C(R1)—R2—O—(—CH2—CH2—O—)k(—CH(R5—CH(R3)—O—)l—(—CH2—CH2—O—)m—H (I)
- wherein
- k is a number in a range of from 10 to 150;
- l is a number in a range of from 5 to 20;
- R1 is H or methyl;
- R2 is a single bond or a divalent linking group of formula —(CH2)n′— and —O—(CH2)n′—, n being a natural number from 1 to 6 and n′ being a natural number from 2 to 6,
- R3 and R5 are independently H, a hydrocarbyl radical comprising 1 to 6 carbon atoms, or an ether group of formula —CH2—O—R3′, R3′ being a hydrocarbyl radical comprising at least 2 carbon atoms, and
- wherein, in the first monomer (C), m is 0, and, in the second monomer (C), m is in a range of from 1 to 15.
11 more elements
Dependencies are inferred from the claim text.