METHOD OF CONDITIONING AN INTERNAL COMBUSTION ENGINE

The efficiency of a diesel engine provided with a source of diesel fuel and a source of lubricating oil can be improved by modifying the lubricating oil by the addition of a stabilized nanoparticulate composition of cerium dioxide. There is provided a method of making a suspension of cerium dioxide...

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Bibliographische Detailangaben
1. Verfasser:	REED, KENNETH J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL ADHESIVES CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS DYES FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR INORGANIC CHEMISTRY LIQUEFIED PETROLEUM GAS LUBRICANTS LUBRICATING COMPOSITIONS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING NATURAL GAS NATURAL RESINS PAINTS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATION OF CARBON BLACK SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	The efficiency of a diesel engine provided with a source of diesel fuel and a source of lubricating oil can be improved by modifying the lubricating oil by the addition of a stabilized nanoparticulate composition of cerium dioxide. There is provided a method of making a suspension of cerium dioxide nanoparticles comprising the steps of: a. providing an aqueous reaction mixture comprising a source of cerous ions, a source of hydroxide ion, at least one nanoparticle stabilizer, and an oxidantat a temperature effective to generate small nuclei size and to oxidize cerous ion to ceric ion; and b. subjecting the reaction mixture to mechanical shearing, thereby forming a suspension of cerium dioxide nanoparticles haying a mean hydrodynamic diameter ranging from 2 nm to 15 nm. The at least one nanoparticle stabilizer is selected from the group consisting of alkoxysubstituted carboxylic acids, .alpha.-hydroxyl carboxylic acids, pyruvic acid, and polyacids. Lefficacité dun moteur diesel comportant une source de carburant diesel et une source dhuile lubrifiante peut être améliorée en modifiant lhuile lubrifiante par lajout dune composition de nanoparticules stabilisée de dioxyde de cérium. Une méthode est présentée en vue de fabriquer une suspension de nanoparticules de dioxyde de cérium comprenant les étapes : a. fournir un mélange de réaction aqueuse comprenant une source dions céreux, une source dions hydroxyde, au moins un stabilisateur de nanoparticules et un oxydant à une température efficace pour générer un noyau de petite taille et pour oxyder lion céreux en ion cérique et b. soumettre le mélange de réaction au cisaillement mécanique, pour ainsi former une suspension de nanoparticules de dioxyde de cérium ayant un diamètre hydrodynamique moyen allant de 2 nm à 15 nm. Le au moins un stabilisateur de particules est sélectionné parmi le groupe comprenant les acides carboxyliques alkoxysubstitués, les acides carboxyliques alpha-hydroxyl, lacide pyruvique et les polyacides.