Fuel and related compositions – Liquid fuels – Heterocyclic carbon compound containing a hetero ring having...
Patent
1997-01-17
1998-04-07
Medley, Margaret
Fuel and related compositions
Liquid fuels
Heterocyclic carbon compound containing a hetero ring having...
508293, 508292, 558546, C10L 122, C10M13316
Patent
active
057359156
ABSTRACT:
A simplified process for preparation of an alkenylsuccinimide or a polyalkenylsuccinimide is described, characterized in that it comprises successively: a stage (a) in which an alkenylsuccinic anhydride or a polyalkenylsuccinic anhydride is prepared by bringing about an ene-synthesis reaction between at least one olefin or one polyolefin and at least one unsaturated dicarboxylic anhydride that is selected from maleic anhydride and the maleic anhydrides that are substituted by 1 or 2 methyl groups, characterized in that said reaction is carried out within at least one aromatic solvent that is selected from toluene and the xylenes that are used at a ratio of between 30 to 70% by weight of the reaction mixture and in which a fraction of said unsaturated dicarboxylic anhydride does not react with said olefin or polyolefin; a stage (b) in which the product of stage (a) that contains unsaturated, unreacted dicarboxylic anhydride is reacted with at least one alcohol or an amine; and a stage (c) in which the product that is obtained in stage (b) is reacted with an amine.
These succinimides can be used as detergent additives for engine fuels and as ashless dispersing additives for engine lubricants.
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Binet Daniel
Durand Jean-Pierre
Gateau Patrick
Paille Fabrice
Institut Francais du Pe'trole
Medley Margaret
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