USE OF COLD FLOW IMPROVER COMPOSITIONS FOR FUELS, BLENDS THEREOF WITH BIOFUELS AND FORMULATIONS THEREOF

摘要

The present invention relates to the use of polyalkyl(meth)acrylates as an additive to fuels, especially middle distillate fuels and blends thereof. The present invention further relates to the use of a composition comprising polyalkyl(meth)acrylates as dispersing species susceptible to disperse waxes and sludgy material at low temperatures and a hydrocarbon solvent/an oil for improving the cold flow properties of fuel oil and fuel oil compositions. The present invention further relates to the use of these compositions as an additive to fuels, especially in the function of paraffin dispersant, to such fuels themselves and to fuel additive concentrates which comprise this composition dissolved in a hydrocarbon solvent or an oil.

主权项

1. A method for improving the cold flow properties of a fuel oil composition, said method comprising
mixing a polyalkyl(meth)acrylate with a fuel oil, wherein said polyalkyl(meth)acrylate comprises monomer units of: (a) from 0% to 40% by weight of one or more ethylenically unsaturated ester compounds of formula (I) wherein R is H or CH3, R1 represents a linear or branched, saturated or unsaturated alkyl group with 1 to 9 carbon atoms or a cycloalkyl group with 3 to 9 carbon atoms, R2 and R3 independently represent H or a group of the formula —COOR′, wherein R′ is H or a linear or branched, saturated or unsaturated alkyl group with 1 to 9 carbon atoms or a cycloalkyl group with 3 to 9 carbon atoms, (b) from 20% to 98% by weight of one or more ethylenically unsaturated ester compounds of formula (II) wherein R is H or CH3, R4 represents a linear or branched, saturated or unsaturated alkyl group with 10 to 22 carbon atoms, R5 and R6 independently represent H or a group of the formula —COOR″, wherein R″ is H or a linear or branched, saturated or unsaturated alkyl group with 10 to 22 carbon atoms, (c) from 0% to 10% by weight of one or more ethylenically unsaturated ester compounds of formula (III) wherein R is H or CH3, R7 represents a linear or branched, saturated or unsaturated alkyl group with 23 to 40 carbon atoms, R8 and R9 independently represent H or a group of the formula —COOR′″ wherein R′″ is H or a linear or branched, saturated or unsaturated alkyl group with 23 to 40 carbon atoms, (d) from 0% to 30% by weight of vinyl aromatic monomers, and (e) from 2% to 80% by weight of at least one N-dispersant monomer, wherein components (a) to (e) add up to 100% by weight.