Fuel oil compositions with improved cold flow properties

Patent metadata

Field	Value
Publication number	US-10047314-B2
Application number	US-201715425427-A
Country	US
Kind code	B2
Filing date	Feb 6, 2017
Priority date	Dec 4, 2003
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

The use is described of polymers which contain, in copolymerized form, an α-olefin, a vinyl ester and an ester of an α,β-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuel oils. In addition, the fuel oils and lubricants additized with these polymers; and also additive packages comprising such polymers are described.

First claim

What is claimed is:

1. A method of preparing a fuel or lubricant composition, comprising adding to the fuel or lubricant composition a polymer which comprises, in copolymerized form, an α-olefin, a vinyl ester and an ester of an α,β-unsaturated carboxylic acid.

2. The method according to claim 1 , wherein the polymer is obtained by free-radical polymerization.

3. The method according to claim 1 , wherein the polymer is composed of monomers including M1, M2 and M3 and wherein M1, M2 and M3 have the following general formulae:

where
R 1 is H or C 1 -C 40 -hydrocarbyl;
R 2 , R 3 and R 4 are each independently H or C 1 -C 4 -alkyl;
R 5 is C 1 -C 20 -hydrocarbyl;
R 6 , R 7 and R 8 are each independently H or C 1 -C 4 -alkyl; and
R 9 is C 1 -C 20 -hydrocarbyl.

4. The method according to claim 3 , wherein the monomers M1, M2 and M3 are present in the polymer in the following molar proportions:
M1: from 0.60 to 0.98
M2: from 0.01 to 0.20
M3: from 0.01 to 0.20.

5. The method according to claim 3 , wherein the monomer M1 is ethylene.

6. The method according to claim 3 , wherein R 2 , R 3 and R 4 are each H or two of the R 2 , R 3 and R 4 radicals are each H and the other radical is methyl.

7. The method according to claim 3 , wherein R 5 is C 1 -C 9 -hydrocarbyl.

8. The method according to claim 7 , wherein R 5 is n-butyl or 2-ethylhexyl.

9. The method according to claim 6 , wherein M2 is n-butyl acrylate or 2-ethylhexyl acrylate.

10. The use method according to claim 3 , wherein M3 is vinyl acetate.

11. The method according to claim 1 , wherein the polymer is a cold flow improver.

12. A fuel oil composition comprising:
a middle distillate fuel boiling in a range of 120-500° C.; and
at least one polymer as defined in claim 1 ,
wherein a content of the middle distillate fuel is greater than a content of the polymer by weight.

13. The fuel oil composition according to claim 12 , wherein the fuel component comprises biodiesel in proportions of 0-100% by weight.

14. The fuel oil composition according to claim 12 , selected from diesel fuels, kerosene and heating oil.

15. The fuel oil composition according to claim 14 , wherein the diesel fuel is obtained by refining, coal gasification or gas liquefaction, or is a mixture of such products and is optionally mixed with renewable fuels.

16. The fuel oil composition according to claim 12 , wherein a sulfur content of the composition is at most 500 ppm.

17. A lubricant composition, comprising:
a lubricant; and
at least one polymer as defined in claim 1 ,
wherein a content of the lubricant is greater than a content of the polymer by weight.

18. The method according to claim 1 , wherein the polymer is used in combination with further cold flow improvers and/or further lubricant and fuel oil additives.

19. An additive package comprising at least one polymer as defined in claim 1 in combination with at least one further lubricant or fuel oil additive.

20. The method according to claim 4 , wherein the monomers M1, M2 and M3 are present in the polymer in the following molar proportions:
M1: from 0.60 to 0.98
M2: from 0.015 to 0.17
M3: from 0.02 to 0.15.

21. The method according to claim 4 , wherein the monomers M1, M2 and M3 are present in the polymer in the following molar proportions:
M1: from 0.60 to 0.98
M2: from 0.02 to 0.16
M3: from 0.02 to 0.15.

Assignees

• Basf Se

Inventors

• Ahlers Wolfgang
• Fechtenkoetter Andreas
• Maehling Frank-Olaf
• Troetsch-Schaller Irene
• Eisenbeis Ansgar

Classifications

• C10N2030/08

  Resistance to extreme temperature · CPC title

• C08F210/02

  Ethene · CPC title

• C10L10/14

  for improving low temperature properties · CPC title

• C10M145/14

  Acrylate; Methacrylate · CPC title

• C10M2209/084

  Acrylate; Methacrylate · CPC title