Oil additives and compositions
AssigneeExxon Chemical Patents Inc.
InventorsBrian William Davies, Kenneth Lewtas, Alessandro Lombardi
Life of this patent
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Abstract
The low temperature properties of a blend of biofuel and petroleum-based fuel oil are improved by the addition of an ethylene-unsaturated ester copolymer, or a comb polymer, or a polar N compound, or a compound having at least one linear alkyl groups connected to a non-polymeric organic residue.
Claims3
A fuel oil composition comprising a mixture of 10-50% by weight of a biofuel selected from the group consisting of vegetable oil and re-esterified vegetable oil with a petroleum based middle distillate fraction containing 0.0005% to 1% by weight of an additive being a mixture of a first ethylene vinyl acetate copolymer having 36 wt. % ethylene and an Mn of about 2400 with a second ethylene vinyl acetate copolymer having 14 wt. % vinyl acetate and a Mn of about 3500, the weight ratio of the first ethylene vinyl acetate to the second being 6:1.
A fuel oil composition comprising a mixture of 10-50% by weight of a biofuel selected from the group consisting of vegetable oil and re-esterified vegetable with a petroleum based middle distillate fraction containing 0.0005% to 1% by weight of an additive comprising a mixture of an oil soluble ethylene vinyl acetate and a wax antisettling agent which is a mixture of equal parts by weight of (i) a C.sub.12 /C.sub.14 alkyl fumarate/vinyl acetate comb copolymer and (ii) the amide-amine salt of phthalic anhydride with two molar properties of hydrogenated tallow.
A fuel oil composition comprising a mixture of 10-50% by weight of a biofuel selected from the group consisting of vegetable oil and re-esterified vegetable oil with a petroleum based middle distillate fraction containing 0.0005% to 1% by weight of an additive comprising a mixture of an oil soluble ethylene vinyl acetate and a wax antisettling agent which is a blend of 1 part each by weight of a C.sub.16 alkyl polyitaconate and C.sub.18 alkyl polyitaconate and 2 parts by weight of the amide-amine salt of phthalic anhydride with two molar proportions of hydrogenated tallow.
Dependencies are inferred from the claim text.