Substituted fullerenes as flow improvers
US5503643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/736
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The fuel oil-substituted fullerene compositions of the invention are useful for improving the cold flow properties of fuels. Typically the substituted fullerenes have the general formula C.sub.Fn (GRy)x, where C.sub.Fn is a fullerene, n is the number of carbon atoms in the fullerene, x is an integer from 1 up to the maximum number of sites on the fullerene molecule available for adding substituent groups, G is a linking group that may be absent or present, and when present is an oxygen, sulfur, nitrogen, phenol, aniline, Mannich base or diazocarboxylate-derived group, y is an integer determined by the identity of G, and when y equals 1 R is a substituted or unsubstituted hydrocarbyl group and when y equals 2 at most one R may be hydrogen while the remainder are hydrocarbyl groups, and the R group may be the same or different, and wherein when x is greater than 1 the GRy may be the same or different and at most one R may be hydrogen. Also included in the invention are additive concentrates, the substituted fullerenes in the fuel and a liquid carrier medium, and the method of using the substituted fullerenes to improve cold flow properties of fuels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.