US 11,738,292 B2
Terpolymers for oil sands tailings treatment
Tom Fenderson, Decatur, GA (US); Igal Maasen, Acworth, GA (US); Erica Pin, Houston, TX (US); and Miguel Pelaez, Decatur, GA (US)
Assigned to KEMIRA OYJ, Helsinki, FL (US)
Appl. No. 16/644,543
Filed by KEMIRA OYJ, Helsinki (FI)
PCT Filed Sep. 4, 2018, PCT No. PCT/US2018/049345
§ 371(c)(1), (2) Date Mar. 5, 2020,
PCT Pub. No. WO2019/050835, PCT Pub. Date Mar. 14, 2019.
Claims priority of provisional application 62/554,146, filed on Sep. 5, 2017.
Prior Publication US 2021/0060455 A1, Mar. 4, 2021
Int. Cl. B01D 21/01 (2006.01); C02F 1/52 (2023.01); C02F 11/148 (2019.01); C08F 220/06 (2006.01); C08F 220/34 (2006.01); C08F 220/56 (2006.01); C08L 33/02 (2006.01); C10G 1/00 (2006.01); B03D 3/02 (2006.01); B03D 3/06 (2006.01); C10G 1/04 (2006.01)
CPC B01D 21/01 (2013.01) [C02F 1/5245 (2013.01); C02F 11/148 (2019.01); C08F 220/06 (2013.01); C08F 220/34 (2013.01); C08F 220/56 (2013.01); C08L 33/02 (2013.01); C10G 1/002 (2013.01); B03D 3/02 (2013.01); B03D 3/06 (2013.01); C10G 1/045 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A terpolymer suitable for use as a flocculant for treating an aqueous suspension of solids, wherein said terpolymer is comprised of (i) acrylamide (“AMD”) (ii) calcium diacrylate (“CDA”), and (iii) acryloyloxyethyltrimethyl ammonium chloride (“AETAC”) monomers, and wherein the mole percent of said (iii) AETAC monomers ranges from 0.3 mol % to 3.2 mol %.