| 摘要 |
<p>The present invention provides a method of asphaltene control in a hydrocarbon fluid, the method employing a composition comprising: a dispersant of formulae (I) or (II), including salts thereof, wherein T or T′is hydrogen or a polymerizing terminating group; A is C16-20 alkylene or alkenylene group; B is C10-20 alkylene or alkenylene group; Z and Z′are the residue of a polyamine or polyimine; n is 2 to 50; m is 0 to 25; p and p′are 2 or more, in one embodiment not greater than 2000 and in another embodiment not greater than 1000; A′is C8-20 alkylene or alkenylene group; n′is 2 to 10; and the weight ratio of T-(O-A-CO)n (O—B—CO)m to Z or T′-(O-A′-CO)n to Z′is at least 5:1.</p> |
