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US 2017/0183590 A1Published application
Corrosion inhibitors for fuels and lubricants
AssigneeBASF SE
InventorsJochen MEZGER, Maxim PERETOLCHIN, Aaron FLORES-FIGUEROA, Markus HANSCH, Ivette GARCIA CASTRO, Klaus MUEHLBACH
Life of this patent
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Abstract
The present invention relates to novel uses of corrosion inhibitors in fuels and lubricants.
Claims17
1-13. (canceled)
14:
- A corrosion inhibitor, comprising:
- a copolymer obtained by a process comprising:
- copolymerizing
- (A) at least one ethylenically unsaturated mono- or dicarboxylic acid or a derivative thereof selected from the group consisting of an anhydride in a monomeric or a polymeric form, a mono- or alkyl ester, and a mixed ester,
- (B) at least one α-olefin comprising from 16 to 28 carbon atoms,
- (C) optionally at least one aliphatic or cycloaliphatic olefin which comprises at least 4 carbon atoms and is different than (B), and
- (D) optionally at least one copolymerizable monomer other than (A), (B) and (C), which is selected from the group consisting of (Da) a vinyl ester, (Db) a vinyl ether, (Dc) a (meth)acrylic ester of an alcohol comprising at least 5 carbon atoms, (Dd) an allyl alcohol or ether thereof, (De) a N-vinyl compound selected from the group consisting of a vinyl compound of a heterocycle comprising at least one nitrogen atom, a N-vinylamide, and a N-vinyllactam, (Df) an ethylenically unsaturated aromatic, (Dg) an α,β-ethylenically unsaturated nitrile, (Dh) a (meth)acrylamide, and (Di) an allylamine, thereby obtaining a first copolymer;
- and
- subsequently partly or fully hydrolyzing the anhydride or carboxylic ester functionalities present in the first copolymer until at least the first copolymer does not comprise any free carboxylic functionalities, thereby obtaining the copolymer,
- wherein the copolymer has a weight-average molecular weight Mw determined by permeation chromatography with tetrahydrofuran and polystyrene as standard of 1.5 to 4 kDa,
7 more elements
15:
- The corrosion inhibitor of claim 14, wherein (A) is at least one selected from the group consisting of acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, n-butyl acrylate, methyl methacrylate, and maleic anhydride.
16:
- The corrosion inhibitor of claim 14, wherein (A) is a dicarboxylic acid or a derivative thereof and is at least one selected from the group consisting of an anhydride in a monomeric or a polymeric form, a mono- or dialkyl ester, and a mixed ester.
17:
- The corrosion inhibitor of claim 14, wherein (B) is an α-olefin comprising from 18 to 26 carbon atoms.
18:
- The corrosion inhibitor claim 14, wherein (C) is present during said copolymerizing and is a polymer comprising more than 30 carbon atoms of propene, 1-butene, 2-butene or isobutene, or an olefin mixture comprising the latter and having a weight-average molecular weight Mw in the range of from 500 to 5000 g/mol.
19:
- The corrosion inhibitor of claim 14, wherein
- (C) is present during said copolymerizing,
- (C) is a polymer of isobutene or an olefin mixture comprising the latter,
- (C) has more than 30 carbon atoms, and
- (C) has a weight-average molecular weight Mw of from 500 to 5000 g/mol.
2 more elements
20:
- The corrosion inhibitor of claim 14, wherein
- (C) is present during said copolymerizing, and
- an averaged molar amount of a mixture of (B) and (C) comprises at least 12 carbon atoms.
21:
- The corrosion inhibitor of claim 14, wherein
- (D) is present during said copolymerizing, and
- (D) is at least one selected from the group consisting of (Da), (Db), (Dc), (De) and (Df).
22:
- The corrosion inhibitor of claim 14, wherein
- (C) is present during said copolymerizing, and
- a molar ratio of (A)/[(B)+(C)] is from 10:1 to 1:10.
23:
- The corrosion inhibitor of to claim 22, wherein a molar ratio of (B) to (C) is from 1:0.05 to 10.
24:
- The corrosion inhibitor of claim 14, wherein
- (D) is present during said copolymerizing, and
- a proportion of (D), based on a total amount of (A), (B), and optionally (C), is from 5 to 200 mol %.
25:
- A fuel, comprising:
- at least one alkali metal and/or at least one alkaline earth metal and/or zinc in a total content of at least 0.1 ppm by weight;
- and
- the corrosion inhibitor of claim 14.
1 more element
26:
- The fuel of claim 25, wherein the at least one alkali metal and/or the at least one alkaline earth metal are selected from the group consisting of sodium, magnesium, and calcium.
27:
- The fuel of claim 25, wherein the fuel is a diesel fuel or a gasoline fuel.
28:
- A method for inhibiting corrosion of an iron surface, a steel surface and/or a nonferrous metal surface, the method comprising:
- applying the corrosion inhibitor of claim 14 to the iron surface, the steel surface and/or the nonferrous metal surface.
29:
- The method of claim 26, wherein the nonferrous metal is a copper or a copper-containing alloy.