| 摘要 |
<p>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 <CHEM> in which a has the value 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 (ii) R min N<+>(R<2>)3X<-> linked to the silicon atom of the siloxane unit, R min represents a divalent hydrocarbon group linking the silicon and nitrogen atoms, each R<2> represents an alkyl group having up to 20 carbon atoms and X<-> represents a halogen ion. Preferred organosiloxanes also comprise siloxane units according to the general formula <CHEM> 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 (iv) R3SiO(R2SiO)x(RSiOR min N<+>(R<2>)3X<->)ySiR3 in which x has a value in the range 1 to 150, y has a value in the range 1 to 10 and the ratio of x+y/y lies in the range 2 to 25. In preferred organosiloxanes two of the groups R<2> have 1 to 5 carbon atoms and one of the groups R<2> has a chain of 10 to 15 carbon atoms.</p> |
