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1. IN4704/DELNP/2008 - METHODS FOR PRODUCTION OF METAL OXIDE NANO PARTICLES AND NANO PARTICLES AND PREPARATIONS PRODUCED THEREBY

Office
India
Application Number 4704/DELNP/2008
Application Date 30.05.2008
Publication Number 4704/DELNP/2008
Publication Date 15.08.2008
Publication Kind A
IPC
C01B 13/36
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
13Oxygen; Ozone; Oxides or hydroxides in general
14Methods for preparing oxides or hydroxides in general
36by precipitation reactions in solutions
Applicants JOMA INTERNATIONAL AS
Inventors VITNER ASHER
EYAL AHARON
Priority Data 172837 27.12.2005 IL
Title
(EN) METHODS FOR PRODUCTION OF METAL OXIDE NANO PARTICLES AND NANO PARTICLES AND PREPARATIONS PRODUCED THEREBY
Abstract
(EN)
The invention provides a method for the formation of small-size metal oxide particles, comprising the steps of:a) preparing a starting aqueous solution comprising at least one of metallic ion and complexes thereof, at a concentration of at least 0.1% w/w of the metal component;b) preparing a modifying aqueous solution having a temperature greater than 50°C;c) contacting the modifying aqueous solution with the starting aqueous solution in a continuous mode in a mixing chamber to form a modified system;d) removing the modified system from the mixing chamber in a plug-flow mode;wherein the method is characterized in that:i) the residence time in the mixing chamber is less than about 5minutes; and iii) there are formed particles or aggregates thereof,wherein the majority of the particles formed are between about 2nm andabout 500nm in size.