Cloud point depressants for middle distillate fuels

Details Cloud point depressants for middle distillate fuels Cloud point depressants for middle distillate fuels

1999-07-13

2000-11-07

Johnson, Jerry D.

Fuel and related compositions

Liquid fuels

Heterocyclic carbon compound containing a hetero ring having...

44347, C10L 122

Patent

active

061430439

ABSTRACT:
An additive for distillate and a fuel composition having improved cloud point depressant properties. The additive is incorporated into a major proportion of distillate fuel and is a maleic anhydride .alpha.-olefin copolymer or a polyimide having the following structure: ##STR1## wherein R has at least 80% by weight of a hydrocarbon substituent from about 14 to about 16 carbons, X is oxygen or ##STR2## wherein N is nitrogen and R' has at least 80% by weight of a hydrocarbon substituent from 16 to 18 carbons, and n is from about 2 to about 30 when X is oxygen, and from about 2 to about 17 when X is ##STR3## Alternatively, the cloud point additive can be an ethylene vinyl acetate isobutylene terpolymer.

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patent: 2698316 (1954-12-01), Giammaria
patent: 3413104 (1968-11-01), Mehmedbasich
patent: 3458295 (1969-07-01), Mehmedbasich
patent: 3909215 (1975-09-01), Kray
patent: 4537601 (1985-08-01), Naiman
patent: 5766273 (1998-06-01), Dralle-Voss et al.

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