Copper-containing aromatic mannich complexes and concentrates and diesel fuels containing same

A method of operating a diesel engine equipped with an exhaust system particulate trap to reduce build-up of exhaust particles collected in said trap comprising operating said diesel engine with a diesel fuel containing an effective amount of at least one copper-containing complex to lower to lower the ignition temperature of the exhaust particulates collected in said trap, said copper-containing complex being made by contacting

• (B)(I) at least one compound represented by the formula ##STR16## wherein R.sup.3 is an alkyl group of about 12 carbon atoms and R.sup.5 is oleyl;
• (B)(II) at least One compound represented by the formula ##STR17## wherein R.sup.6 and R.sup.8 are each alkyl groups of about 12 carbon atoms;
• and
• (C) copper carbonate;
• the molar ratio of (B)(I) to (B)(II) being from about 2:1 to about 3:
• 1;
• and the ratio of total gram-moles of (B)(I) and (B)(II) to gram-atoms of copper in (C) being from about 2:1 to about 3:1.

A method of operating an apparatus powered by a diesel engine and equipped with a fuel additive dispenser and an exhaust system particulate trap comprising:

• operating said engine using a diesel fuel;
• maintaining a fuel additive comprising at least one copper-containing complex in said fuel additive dispenser;
• blending an effective amount of said fuel additive with said diesel fuel to reduce the ignition temperature of exhaust particulates collected in said trap;
• said copper-containing complex being made by contacting either component (A) or component (B) with component (C);
• component (A) being at least one compound represented by the formula ##STR18## wherein R.sup.1 is an alkyl group of 1 to about 6 carbon atoms, and R.sup.2 is a saturated or unsaturated aliphatic hydrocarbyl group of about 16 to about 20 carbon atoms;
• component (B) being a mixture of (B)(I) and (B)(II), component (B)(I) being at least one compound represented by the formula ##STR19## wherein R.sup.3 is an alkyl group of about 9 to about 18 carbon atoms, R.sup.4 is an alkylene group of 1 to about 4 carbon atoms, and R.sup.4 is a saturated or unsaturated hydrocarbyl group of about 16 to about 20 carbon atoms;
• and component (B)(II) is at least one compound represented by the formula ##STR20## wherein R.sup.6 and R.sup.8 are independently alkyl groups of about 9 to about 18 carbon atoms, and R.sup.7 is an alkylene group of 1 to about 4 carbon atoms;
• and
• component (C) is at least one copper reactant.

A method of operating an apparatus powered by a diesel engine and equipped with a fuel additive dispenser and an exhaust system particulate trap comprising:

• operating said engine using a diesel fuel;
• maintaining a fuel additive comprising at least one copper-containing complex in said fuel additive dispenser;
• blending an effective amount of said fuel additive with said diesel fuel to reduce the ignition temperature of exhaust particulates collected in said trap;
• said copper-containing complex being made by contacting
• (A) a compound represented by the formula ##STR21## wherein R.sup.1 is t-butyl and R.sup.2 is oleyl;
• and (C) copper carbonate;
• the ratio of gram-moles Of (A) to gram-atoms of copper in (C) being about 1:5:1 to about 3:1.

A method of operating an apparatus powered by a diesel engine and equipped with a fuel additive dispenser and an exhaust system particulate trap comprising:

• operating said engine using a diesel fuel;
• maintaining a fuel additive comprising at least one copper-containing complex in said fuel additive dispenser;
• blending an effective amount of said fuel additive with said diesel fuel to reduce the ignition temperature of exhaust particulates collected in said trap;
• said copper-containing complex being made by contacting (B)(I) at least one compound represented by the formula ##STR22## wherein R.sup.3 is an alkyl group of about 12 carbon atoms and R.sup.5 is oleyl;
• (B)(II) at least one compound represented by the formula ##STR23## wherein R.sup.6 and R.sup.8 are each alkyl groups of about 12 carbon atoms;
• and
• (C) copper carbonate;
• the molar ratio of (B)(I) to (B)(II) being from about 2:1 to about 3:1;
• and the ratio of total gram-moles of (B)(I) and (B)(II) to gram-atoms of copper in (C) D being from about 2:1 to about 3:1.