Lubricant comprising a diester of adipic acid with a tridecanol

Patent metadata

Field	Value
Publication number	US-11932819-B2
Application number	US-201917291134-A
Country	US
Kind code	B2
Filing date	Oct 28, 2019
Priority date	Nov 5, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

The invention relates to a lubricant comprising a diester of adipic acid with a tridecanol mixture which comprises 20 to 60% of at least triply branched tridecanols, 10 to 50% doubly branched tridecanols, and 5 to 30% singly branched and/or linear tridecanols, and where the percentages are determined by gas chromatography.

First claim

The invention claimed is:

1. A method for reducing friction between moving surfaces comprising the steps of:
a) obtaining a tridecanol mixture by hydroformylation and hydrogenation of a mixture of isomeric dodecenes obtained by reacting a hydrocarbon mixture comprising butenes on a heterogeneous catalyst, wherein the heterogeneous catalyst comprises nickel oxide, and wherein the heterogeneous catalyst is a precipitation catalyst obtained by mixing aqueous solutions of nickel salts and silicates;
wherein the tridecanol mixture comprises
20 to 60% of at least triply branched tridecanols,
10 to 50% doubly branched tridecanols, and
5 to 30% singly branched and/or linear tridecanols, and

where the percentages are determined by gas chromatography;
where the tridecanol mixture comprises less than 5 wt % tetradecanol;
b) obtaining a diester of adipic acid with the tridecanol mixture by esterification of adipic acid and the tridecanol mixture, wherein the diester has a pour point below −50° C. and a viscosity index of at least 140; and
c) contacting the surfaces with a lubricant comprising the diester of the adipic acid with the tridecanol mixture.

2. The method according to claim 1 where the tridecanol mixture comprises 25 to 50% of at least triply branched tridecanols.

3. The method according to claim 1 where the tridecanol mixture comprises 20 to 45% doubly branched tridecanols.

4. The method according to claim 1 where the tridecanol mixture comprises 10 to 25% singly branched and/or linear tridecanols.

5. The method according to claim 1 where the tridecanol mixture comprises at least 85 wt % of linear or branched tridecanols.

6. The method according to claim 5 where the tridecanol mixture comprises at least 98 wt % of linear or branched tridecanols.

7. The method according to claim 1 where the tridecanol mixture comprises less than 15 wt % dodecanol.

8. The method according to claim 7 where the tridecanol mixture comprises less than 2 wt % dodecanol.

9. The method according to claim 1 where the tridecanol mixture comprises less than 1 wt % tetradecanol.

10. The method according to claim 5 , wherein
the tridecanol mixture comprises at least 98 wt % of linear or branched tridecanols,
the tridecanol mixture comprises less than 2 wt % dodecanol and
the tridecanol mixture comprises less than 1 wt % tetradecanol.

11. The method according to claim 1 further comprising a base oil selected from the group consisting of mineral oils, polyalphaolefins, polymerized and interpolymerized olefins, alkyl naphthalenes, alkylene oxide polymers, silicone oils, phophate ester and carboxylic acid ester; and further comprises a lubricant additive.

12. The method according to claim 1 , where the tridecanol mixture comprises less than 3 wt % tetradecanol.

13. The method according to claim 1 , wherein the heterogeneous catalyst is a catalyst whose active substantial constituents are from 10 to 70 percent by weight of nickel oxide, from 5 to 30 percent by weight of titanium dioxide and/or zirconium dioxide, and from 0 to 20 percent by weight of aluminum oxide, and the remainder being silicon dioxide.

14. The method according to claim 1 , wherein the heterogeneous catalyst is obtainable by precipitating the catalyst composition at a pH of from 5 to 9 by adding an aqueous solution comprising nickel nitrate to an alkali metal water glass solution which comprises titanium dioxide and/or zirconium dioxide, filtering, drying and amlealing at from 350 to 650 degrees C.

15. The method according to claim 1 , wherein the diester has a pour point below −61° C.

16. The method according to claim 1 , wherein the diester has a viscosity index of at least 145.

17. The method according to claim 1 , wherein the nickel salt is nickel nitrate and the silicate is sodium silicate.

Assignees

• Basf Se

Inventors

• Scherer Markus
• Strittmatter Jan
• Breitscheidel Boris

Classifications

• C10M105/36 Primary

  of polycarboxylic acids · CPC title

• C10M169/04

  Mixtures of base-materials and additives · CPC title

• C10M177/00

  Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes · CPC title

• C10M2207/2825

  used as base material · CPC title

• C10M2207/2835

  used as base material · CPC title