Bp Oil International Limited

Anthony George William Parker

Philip Howard

Alisdair Quentin Clark

Unleaded blend composition having a Motor Octane Number (MON) of at least 80 having less than 42% of aromatic compounds, and at least 2% by volume of the total composition of component (a'), which is a substantially aliphatic hydrocarbon refinery stream of MON value of at least 85. At least 70% in total of the stream is branched chain alkanes, the stream being obtained by distillation from a refinery material as a cut having Initial Boiling Point of at least 15&#xb0; C. and Final Boiling Point of at most 160&#xb0; C. The Boiling Points are measured according to ASTMID2892. At least 5% of at least one paraffin, aromatic hydrocarbon compound or olefinic hydrocarbon has a bp 60-160&#xb0; C., with not more than 5% of the total composition of hydrocarbon having a bp more than 160&#xb0; C. Less than 5% 2,2,3-trimethylbutane or 2,2,3-trimethylpentane is present.

Fuel composition

Unleaded blend compositions, as well as formulated gasolines containing them have a Motor Octane Number (MON) of at least 80 comprising either: The components (a), (a') and (a&#x2033;) give rise to reduced emissions to the composition or gasoline on combustion.

A process for preparing at least two compositions suitable for production of gasoline, which process comprises: fractionating an alkylation product to produce a first cut boiling in the range 90-106&#xb0; C., a second cut boiling at temperature lower than said first cut, and a third cut boiling at a temperature above said first Cut, blending at least 2% by volume of said first cut with at least 5% of a component selected from at least one of a paraffin, an aromatic hydrocarbon and an olefinic hydrocarbon, said component having a boiling point of 60-160&#xb0; C., wherein not more than 5% of the total composition of hydrocarbon has a boiling point of more than 160&#xb0; C. and wherein said composition comprises less than 5% of 2,2,3-trimethylbutane or 2,2,3-trimethylpentane, to produce a first high octane unleaded gasoline composition of RON at least 97 and MON value at least 86, and incorporating said second and third cuts with said component to produce a second high octane unleaded gasoline composition of RON at least 92 and MON value at least 80.

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Hook, United Kingdom

Anthony George William Parker