Fuel composition
AssigneeShell Oil Company
InventorsMark Lawrence Brewer, Felix Balthasar, Karsten Wilbrand
Life of this patent
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Abstract
A middle distillate fuel composition is provided comprising (a) a middle distillate base fuel, (b) a Fischer-Tropsch derived paraffinic wax component, and (c) one or more cold flow additives; a method for formulating a middle distillate fuel composition comprising a middle distillate base fuel, comprising (i) incorporating into the base fuel a Fischer-Tropsch derived wax component. The use of a Fischer-Tropsch derived wax component in a middle distillate fuel composition, for the purpose of increasing the effect of a CFPP improver additive in the composition is disclosed.
Claims13
A middle distillate fuel composition comprising (a) a middle distillate base fuel, (b) a Fischer-Tropsch derived paraffinic wax component in the amount of at least 100 mg/kg and less than 3500 mg/kg, based on the fuel composition, having a melting point in the range of from 40° C. to 120° C., and at least 90 wt % of the paraffinic hydrocarbon molecules in the paraffinic wax are n-paraffinic, and (c) one or more cold flow additives in an amount up to 1000 ppmw, wherein the middle distillate base fuel comprises a fatty acid methyl ester, a paraffinic hydrocracked fatty ester middle distillate fuel fraction, and/or a fatty ester middle distillate fuel fraction.
A method for formulating a middle distillate fuel composition comprising a middle distillate base fuel and at least one cold flow additive, comprising (i) incorporating into a base fuel comprising a fatty acid methyl ester, a paraffinic hydrocracked fatty ester middle distillate fuel fraction, and/or a fatty ester middle distillate fuel fraction, a Fischer-Tropsch derived paraffinic wax component wherein at least 90 wt % of the paraffinic hydrocarbon molecules in the paraffinic wax are n-paraffinic, in an amount effective to improve the cold flow response of the fuel to the cold flow additive.
Dependencies are inferred from the claim text.