Removal of water haze from distillate fuel
US4818251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1988 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Apr 28, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/285
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The specification discloses a method of de-hazing distillate fuel which comprises adding to the fuel an organosiloxane having at least one quaternary ammonium substituted siloxane unit having the general formula EQU R.sub.a ZSiO.sub.(3-a)/2 (i) in which a has the value of 1 or 2, each R represents a substituted or unsubstituted hydrocarbon group of up to 10 carbon atoms provided that one of the Rs may be a hydroxyl group when a has the value 2, Z represents a quaternary ammonium group EQU R'N.sup.+ (R.sup.2).sub.3 X.sup.- (ii) linked to the silicon atom of the siloxane unit, R' represents a divalent hydrocarbon group linking the silicon and nitrogen atoms, each R.sup.2 represents an alkyl group having up to 20 carbon atoms and X.sup.- represents a halogen ion. Preferred organosiloxanes also comprise siloxane units according to the general formula EQU R.sub.b SiO.sub.(4-b)/2 (iii) in which each R is a substituted or unsubstituted hydrocarbon group of up to 10 carbon atoms and b has the value 1, 2, or 3 and may be according to the average general formula EQU R.sub.3 SiO(R.sub.2 SiO).sub.x (RSiOR'N.sup.+ (R.sup.2).sub.3 X.sup.-).sub.y SiR.sub.3 (iv) in which x has a value in the range…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.