METHOD FOR PRODUCING CERIUM-CONTAINING NANOPARTICLES

A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture contain a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer whe...

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Bibliographische Detailangaben
Hauptverfasser:	PROK, GARY R, REED, KENNETH J, HAILSTONE, RICHARD K, DIFRANCISCO, ALBERT GARY
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR INORGANIC CHEMISTRY LIQUEFIED PETROLEUM GAS LUBRICANTS METALLURGY NATURAL GAS PEAT PETROLEUM, GAS OR COKE INDUSTRIES SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Beschreibung
Zusammenfassung:	A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture contain a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer wherein the molar ratio of said monoether carboxylic acid nanoparticle stabilizers to total metal ions is greater than 0.2, and an oxidant at an initial temperature in the range of about 20'C to about 95'C. Temperature conditions are provided effective to enable oxidation of cerous ion to ceric ion, thereby forming a product dispersion of cerium-containing oxide nanoparticles, optionally containing one or more metal ions (M), CelxMx02_6 , wherein "x" has a value from about 0.0 to about 0.95. The nanoparticles may have a mean hydrodynamic diameter from about 1 nm to about 50 nm, and a geometric diameter of less than about 45 nm.