Lubricity additive, process for preparing lubricity additives, and middle distillate fuel compositions containing the same
US6719814B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1999 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Nov 4, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/191
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a lubricity additive in the form of an ester of an acid and an alcohol, wherein the acid is an aromatic mono-, di- or polyhydric, mono-, di- or polycarboxylic acid or mixture thereof, which may be alkylated and/or alkoxylated and wherein the alkyl and/or alkoxy groups, if any, are independently selected from groups having from 1 to 30 carbon atoms, characterised in that (a) the alcohol is glycerol, and (b) the mole percent of acid groups in the lubricity additive is less than 10%, based on the total of acid and ester groups. The invention also provides a process for preparing the lubricity additive, and a middle distillate fuel oil having a sulphur concentration of 0.2% by weight or less, and a minor portion of the lubricity additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.