| 摘要 |
<p>An additive composition for improving low temperature flow properties of a wax-containing petroleum distillate fuel comprises:
A. an amorphous, normally solid, essentially saturated hydrocarbons fraction substantially free of normal paraffin hydrocarbons;
B. a wax modifying random copolymer of ethylene and an unsaturated ester; and
C. a fuel-soluble liquid or solid ether.
<??>Examples of the components are (A) those obtained from deasphalting a residual petroleum fraction and removal of normal paraffins, (B) ethylene-vinyl acetate and ethylene-methyl methacrylate polymers, (C) an alkyl diphenyl ether in which the alkyl group is a dimerized C16 alpha olefin.
<??>Preferred treat rates are from 0.15 to 0.75 wt % based on the middle distillate fuel, particularly one boiling within the limits 120 DEG C to 450 DEG C. </p> |
