Patent ID: 11932819
Assignee: BASF SE
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
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.