PROCESS FOR PREPARING FINE METAL OXIDE PARTICLES

Disclosed is a process for preparing fine metal oxide particles, comprising the following steps of reacting a reactant mixture comprising i) water, ii) at least one water-soluble metal nitrate and iii) ammonia or ammonium salt at 250-700° C. under 180-550 bar for 0.01 sec to 10 min in a reaction zon...

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Bibliographic Details
Main Authors PARK, SE-WOONG, SONG, KYU-HO, MYEONG, WAN-JAE, BAIK, JIN-SOO, CHUNG, CHANG-MO
Format Patent
LanguageEnglish
French
German
Published 14.09.2011
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
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
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
MANUFACTURE OR TREATMENT THEREOF
METALLURGY
NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS,MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES ASDISCRETE UNITS
NANOTECHNOLOGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:Disclosed is a process for preparing fine metal oxide particles, comprising the following steps of reacting a reactant mixture comprising i) water, ii) at least one water-soluble metal nitrate and iii) ammonia or ammonium salt at 250-700° C. under 180-550 bar for 0.01 sec to 10 min in a reaction zone to synthesize the metal oxide particles, the metal nitrate being contained at an amount of 0.01-20 wt % in the reactant mixture; and separating and recovering the metal oxide particles from the resulting reaction products. According to the present invention, nano-sized metal oxide particles are synthesized, while the harmful by-products generated concurrently therewith are effectively decomposed in the same reactor.
Bibliography:Application Number: EP20030764228