Diesel fuel additives and diesel fuels containing soluble platinum group metal compounds and use in diesel engines

Claim 1

A method of reducing emissions from or increasing the utilizable energy of diesel fuel for powering internal combustion engines, comprising admixing with diesel fuel a fuel soluble organo-metallic fuel additive composition in an amount effective to supply from 0.01 to 1.0 parts per million of platinum per part of fuel, said composition comprising a compound having the general formula XPtR.sub.1 R.sub.2 wherein X is a ligand containing at least one unsaturated carbon-to-carbon bond with an olefinic, acetylenic or aromatic pi bond configuration and R 1 and R2 are, independently, benzyl, phenyl, nitrobenzyl or alkyl having from 1-10 carbons.

Claim 2

A method of reducing emissions from or increasing the utilizable energy of diesel fuel for powering internal combustion engines, comprising admixing with diesel fuel a fuel soluble organo-metallic fuel additive composition in an amount effective to supply from 0.01 to 1.0 parts per million of platinum per part of fuel, said composition comprising a compound having the general formula XPtR.sub.1 R.sub.2 wherein X is a ligand containing at least one unsaturated carbon-to-carbon bond with an olefinic, acetylenic or aromatic pi bond configuration and R 1 and R2 are, independently, benzyl, phenyl, nitrobenzyl or alkyl having from 1-10 carbons.

Claim 13

A method of increasing the utilizable energy of diesel fuel for powering internal combustion engines, comprising admixing with diesel fuel a fuel soluble organo-metallic fuel additive composition in an amount effective to supply from 0.01 to 1.0 parts per million of platinum group metal per part of fuel, said composition comprising compounds selected from the group consisting of 2,2'- bis (N, N-dialkylamino) 1,1'-diphenyl metals of the general formula ##STR5## wherein M is platinum, palladium, rhodium or iridium; R 1 -R 4 are, independently, alkyl having from 1-10 carbons; and n is an integer from 1-5; tetrakis (alkoxy carbonyl) metal cycloalkenes of the general formula R.sub.2 MC.sub.4 (COOR.sub.1).sub.4 wherein M is platinum, palladium, rhodium or iridium; R 1 is alkyl having from 1-5 carbons; and R 2 is cycloalkene having from 5-8 carbons and from 2-4 unsaturations in the ring structure; bis(cyclopentadiene) acetylene dipalladium compounds of the general formula (φC Cφ)(C.sub.5 φ.sub.5).sub.2 Pd.sub.2 wherein φ is phenyl; dialkyl dipyridyl metals of the formula R.sub.1 R.sub.2 M(C.sub.10 H.sub.8 N.sub.2) wherein R 1 and R 2 are alkyl having from 1-10 carbons; and M is platinum, palladium, rhodium or iridium; and bis (π-allyl) metals of the general formula (R-C.sub.3 H.sub.4).sub.2 M wherein M is platinum, palladium, iridium and rhodium; and R is hydrogen, aryl or alkyl having from 1-10 carbons.

Claim 14

A method of increasing the utilizable energy of diesel fuel for powering internal combustion engines, comprising admixing with diesel fuel a fuel soluble organo-metallic fuel additive composition in an amount effective to supply from 0.01 to 1.0 parts per million of platinum group metal per part of fuel, said composition comprising compounds selected from the group consisting of 2,2'- bis (N, N-dialkylamino) 1,1'-diphenyl metals of the general formula ##STR5## wherein M is platinum, palladium, rhodium or iridium; R 1 -R 4 are, independently, alkyl having from 1-10 carbons; and n is an integer from 1-5; tetrakis (alkoxy carbonyl) metal cycloalkenes of the general formula R.sub.2 MC.sub.4 (COOR.sub.1).sub.4 wherein M is platinum, palladium, rhodium or iridium; R 1 is alkyl having from 1-5 carbons; and R 2 is cycloalkene having from 5-8 carbons and from 2-4 unsaturations in the ring structure; bis(cyclopentadiene) acetylene dipalladium compounds of the general formula (φC Cφ)(C.sub.5 φ.sub.5).sub.2 Pd.sub.2 wherein φ is phenyl; dialkyl dipyridyl metals of the formula R.sub.1 R.sub.2 M(C.sub.10 H.sub.8 N.sub.2) wherein R 1 and R 2 are alkyl having from 1-10 carbons; and M is platinum, palladium, rhodium or iridium; and bis (π-allyl) metals of the general formula (R-C.sub.3 H.sub.4).sub.2 M wherein M is platinum, palladium, iridium and rhodium; and R is hydrogen, aryl or alkyl having from 1-10 carbons.

Claim 19

The method of claim wherein said octyl nitrate is employed at a level up to about 1 percent of said composition and said metal is present at a level of from 0.05 to 0.5 parts per million parts fuel.