Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Mark F. Wilkes0
Mark C. Davies0
Date of Patent
September 14, 2010
Patent Application Number
11576969
Date Filed
October 26, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
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.
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