Middle distillate fuel having improved low temperature flow properties

摘要

The present invention provides for a middle distillate fuel having a boiling range within about 120 DEG to about 400 DEG C. which has enhanced low temperature flow properties. These enhanced properties are provided by the addition of a mixture comprising: a) the sulfonamide or amine salt reaction product of an alkylaryl sulfonic acid having from about 10 to about 70 carbon atoms and a primary, secondary tertiary or quaternary amine having from 4 to about 40 carbon atoms; b) an alkyl diphenyl ether wherein the alkyl group contains from about 16 to about 44 carbon atoms; and c) an oil soluble nitrogen-containing compound containing a total of about 30 to about 300 carbon atoms and having at least one straight chain alkyl segment of 8 to 40 carbon atoms and selected from the class consisting of the amine salt and/or amide reaction product of a hydrocarbyl carboxylic acid or anhydride having 1 to 4 carbonyl groups and a primary, secondary, tertiary or quaternary amine having from 4 to about 40 carbon atoms. This mixture may be added to very low levels to middle distillate oils, i.e., diesel and home heating oil, to yield fuel products having enhanced cold flow properties.