Patent ID: 6860908
Filing Date: 2005-03-01
Classification: C10L

Abstract:
1. A petroleum middle distillate composition comprising a major proportion of a petroleum middle distillate containing paraffins and having a distillation range of between 150° and 450° C., and a minor proportion, effective to reduce the rate of sedimentation of said paraffins, of at least one additive consisting essentially of a product having an average molecular weight of about 300 to 10,000 resulting from the reaction of (a) at least one aliphatic dicarboxylic compound selected from the group consisting of maleic anhydride, methylmaleic anhydride, n-octadecenyl succinic anhydride and dodecenyl succinic anhydride, with (b) a primary amine which is N-stearyl dipropylene triamine, wherein said primary amine (b) is used in a proportion of 0.3 to 0.7 moles per mole of said dicarboxylic compound (a) and said reaction is carried out at a temperature of 120° C. to 200° C., and continued until substantially all the water or alcohol, or mixture thereof formed during the reaction has evolved.