	US 11,993,756 B2
	Compositions and methods of dispergating paraffins in sulphur-low fuel oils
Matthias Krull, Harxheim (DE); Kerstin Müller, Mainz (DE); Simone Hackländer, Solingen (DE); Oliver Hubert, Düsseldorf (DE); Sergey Burmistrov, Moscow (RU); Lydmila Abramova, Perm (RU); and Alexander Utkin, Krasnogorsk (RU)
Assigned to Clariant International Ltd, Muttenz (CH)
Appl. No. 17/913,755
Filed by Clariant International Ltd., Muttenz (CH)
PCT Filed Jan. 15, 2021, PCT No. PCT/EP2021/050783 § 371(c)(1), (2) Date Sep. 22, 2022, PCT Pub. No. WO2021/190793, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20165086 (EP), filed on Mar. 24, 2020.
Prior Publication US 2023/0340351 A1, Oct. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C10L 10/08 (2006.01); C10L 1/14 (2006.01); C10L 1/22 (2006.01); C10L 1/222 (2006.01); C10L 1/224 (2006.01)

CPC C10L 10/08 (2013.01) [C10L 1/146 (2013.01); C10L 1/2222 (2013.01); C10L 1/224 (2013.01); C10L 2200/0438 (2013.01); C10L 2200/0446 (2013.01)]

33 Claims

1. A method of improving the low-temperature properties of a fuel oil having a sulfur content of less than 50 ppm, and comprising a lubricity additive (C), wherein the method comprises the step of adding a low-temperature additive to the fuel oil, the low-temperature additive comprising

i) at least one oil-soluble amide-ammonium salt of a polycarboxylic acid with a mono- and/or dialkylamine (A),

ii) 5-100% by weight, based on the amount of amide-ammonium salt (A), of an oil-soluble amine (B), and

iii) 0.1 to 10 parts by weight, based on the amount of amide-ammonium salt (A), of a resin formed from at least one aromatic compound bearing an alkyl radical and an aldehyde and/or ketone (D),

wherein the fuel oil contains between 50 and 1000 ppm of a lubricity additive (C) selected from the group consisting of fatty acids, oligomers of unsaturated fatty acids, alk(en)ylsuccinic acids, partial esters of polyols with fatty acids, oligomers of unsaturated fatty acids, alk(en)ylsuccinic acids, fatty acid amides of alkanolamines and mixtures thereof.