Additive combinations and fuels containing them
An additive combination for improving the cold flow properties of distillate fuels comprises a combination of: (A) a distillate flow improver which is an ethylene containing polymer, preferably a copolymer of ethylene with unsaturated esters, e.g., vinyl acetate; (B) a hydrocarbon polymer of C/sub 2/ to C/sub 3/0 olefin of number average molecular weight of 103 to 106 or derivatized version thereof, for example copolymers of ethylene and propylene, or polyisobutylene, which are used as lubricating oil V.I. improvers; and (C) a polar oil soluble compound which includes amides, salts, carboxylates, sulfonates, sulfates, phosphates, phenates and borates, having hydrocarbon solubilizing groups, for example salts and amides of polycarboxylic acid such as phthalic anhydride reacted with hydrogenated secondary tallow amine.
- Assignee:
- Exxon Research and Engineering Co
- Patent Number(s):
- US 4375973
- OSTI ID:
- 6466543
- Country of Publication:
- United States
- Language:
- English
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