	US 11,692,053 B2
	Polymeric pour point depressants for waxy crude oils
Anton Kaiser, Muehldorf am Inn (DE); Michael Feustel, Koengernheim (DE); Christoph Kayser, Mainz (DE); Matthias Krull, Harxheim (DE); Michael Schaefer, Gruendau (DE); and Rashod Smith, Houston, TX (US)
Assigned to CLARIANT INTERNATIONAL LTD, Muttenz (CH)
Filed by Clariant International, Ltd., Muttenz (CH)
Filed on Apr. 21, 2021, as Appl. No. 17/236,635.
Prior Publication US 2022/0363796 A1, Nov. 17, 2022
Int. Cl. C08F 222/06 (2006.01); C10G 71/00 (2006.01)

CPC C08F 222/06 (2013.01) [C10G 71/00 (2013.01); C10G 2300/302 (2013.01); C10G 2300/304 (2013.01); C10G 2300/4075 (2013.01)]

25 Claims

1. A wax inhibitor for hydrocarbon oils comprising an esterified copolymer having repeating structural units derived from an esterified ethylenically unsaturated dicarboxylic acid and at least one α-olefin having at least 18 carbon atoms, whereof at least 3 mol-% of the at least one α-olefin has 30 or more carbon atoms, and wherein the ethylenically unsaturated dicarboxylic acid has been esterified with a mixture of fatty alcohols comprising

i) 70 to 97 mol-% of a saturated fatty alcohol having 18 to 24 carbon atoms and

ii) 3 to 30 mol-% of an unsaturated fatty alcohol having 16 to 24 carbon atoms.