FUEL COMPOSITIONS Russian patent published in 2004 - IPC

FIELD: petrochemical industry; fuel compositions.

SUBSTANCE: the invention is dealt with the field of petrochemical industry, in particular with a gasoline composition used by transportation vehicle, for example, by cars or airplanes. It is offered to apply at least 10 volumetric % of a component (а), which represents at least one alkane with a forked chain, keeping from 8 up to 12 carbon atoms, with at least 4 side groups, which are methyl or ethyl groups. In the composition of unleaded gasoline with ONM equal to at least 80 and ONR - at least 90 for decrease of emissions at its combustion, where the indicated gasoline also contains at least one component (б), which represents at least one liquid hydrocarbon or a mix of such hydrocarbons with_{tboil from 60 up to 160°С, characterized by ONM value of at least 70 and value ONR - at least 90. At that and the total content of a component (b) makes at least 20 vol.%. The invention also presents a method to decrease emissions of the burnt gases at combustion of a lead-free gasoline with ONM at least 80 and ONR at least 90, including at least one component (б), which represents at least one liquid hydrocarbon or a mix of such hydrocarbons withtboil from 60 up to 160°С, characterized by ONM value of at least 70 and value ONR - at least 90. At that and the total content of a component (b) makes at least 20 vol.%, where the method includes introduction in this gasoline of at least 10 vol.% of a component (а), which represents at least one alkane with a forked chain, keeping from 8 up to 12 carbon atoms, with at least 4 side groups, which are methyl or ethyl groups. There is also a description of a final lead-free gasoline with ONM of at least 80 and ONR - at least 90, which includes at least one dopant to an automobile or to an aircraft gasoline and a composition of components (a), (b) and (c). There is also a description of a lead-free mixed composition having an octane number defined by a motor method (ONM), at least 81 and by an octane number, defined by research (ONR), at least - 91. The gasolines produced under the given invention are characterized by high octane numbers and small emissions at combustion.}

EFFECT: gasolines produced under the given invention are characterized by high octane numbers and small emissions at combustion.

60 cl, 10 ex, 3 tbl