초록 ▼

This invention relates to low-sulfur diesel fuels which are useful with diesel engines equipped with exhaust system particulate traps. These fuels contain an effective mount of an organometallic complex to lower the ignition temperature of exhaust particles collected in the trap. The sulfur content

This invention relates to low-sulfur diesel fuels which are useful with diesel engines equipped with exhaust system particulate traps. These fuels contain an effective mount of an organometallic complex to lower the ignition temperature of exhaust particles collected in the trap. The sulfur content of these diesel fuels is no more than about 0.1% by weight, preferably no more than about 0.05% by weight. The organometallic complex is soluble or stably dispersible in the diesel fuel and is derived from (i) an organic compound containing at least two functional groups attached to a hydrocarbon linkage, and (ii) a metal reactant capable of forming a complex with the organic compound (i), the metal being any metal capable of reducing the ignition temperature of the exhaust particles. The functional groups include 〓X, －XR, －NR2, －NO2, 〓NR, 〓NXR, 〓N－R*－XR, [Figure] －CN, －N〓NR and －N〓CR2; wherein X is O or S, R is H or hydrocarbyl, R* is hydrocarbylene or hydrocarbylidene, and a is a number (e.g., zero to about 10). Useful metals include Na, K, Mg, Ca, Sr, Ba, Ti, Zr, V, Cr, Mo, Mn, Fe, Co, Cu, Zn, B, Pb, Sb, and mixtures of two or more thereof. This invention is also directed to methods of operating a diesel engine equipped with an exhaust system particulate trap using the foregoing low-sulfur diesel fuels.

대표청구항 ▼

A diesel fuel composition for use with a diesel engine equipped with an exhaust system particulate trap comprising: a major amount of a diesel fuel characterized by a sulfur content of no more than about 0.1% by weight; and a minor amount effective to lower the ignition temperature of exhaust partic

A diesel fuel composition for use with a diesel engine equipped with an exhaust system particulate trap comprising: a major amount of a diesel fuel characterized by a sulfur content of no more than about 0.1% by weight; and a minor amount effective to lower the ignition temperature of exhaust particles collected in said trap of at least one organometallic complex, said complex being a heterocyclic complex, a borated complex, or a borated heterocyclic complex derived from (i) at least one organic compound containing a hydrocarbon linkage and at least two functional groups, each of said functional groups being independently =X, －XR, －NR2, －NO2, 〓NR, 〓NXR, 〓N－R*－XR, [Figure] －N〓CR2, －CN or －N〓NR, wherein X is O or S, R is H or hydrocarbyl, R* is hydrocarbylene or hydrocarbylidene, said organic compound being a compound other than a sulfur-coupled compound represented by the formula [Figure] (XLIV) wherein in Formula (XLIV), R1 and R2 are independently hydrocarbyl groups and R3 is S; and (ii) at least one metal reactant wherein said metal is capable of forming a complex with component (i), said metal being selected from the group consisting of Mg, Sr, Ba, Ti, Zr, V, Cr, Mo, Mn, Fe, Cu, Zn, Pb, Sb, and mixtures of two or more thereof.