EP 2231326 A2 20100929 - PURIFIED POWDER OF NANOMETRIC PARTICLES
Title (en)
PURIFIED POWDER OF NANOMETRIC PARTICLES
Title (de)
GEREINIGTES NANOMETRISCHES TEILCHENPULVER
Title (fr)
POUDRE DE PARTICULES NANOMETRIQUES PURIFIEE
Publication
Application
Priority
- FR 2008052162 W 20081128
- FR 0759487 A 20071130
- FR 0850805 A 20080208
Abstract (en)
[origin: WO2009071862A2] The invention relates to a method for synthesising a powder, said method comprising the following successive steps: A) the preparation of a mother liquor comprising i. an oxide base constituent or a precursor of said base constituent and an additional constituent of formula MC, the additional constituent consisting of an agent M selected from the group of oxoanions, anions of the elements of column 17 of the periodic table of elements, hydroxide OH-, and the mixtures thereof, and a complement C which is inorganic when the agent is hydroxide OH-; or ii. an oxide base constituent or a precursor of the base constituent comprising an agent M selected from the group of oxoanions, anions of the elements of column 17 of the periodic table of elements, and the mixtures thereof; B) the hydrothermal preparation of a sol, from said mother liquor, containing coarse particles of a maximum size higher than 10 nm and lower than 250 nm, or even lower than 100 nm; and C) the sol is washed in such a way as to obtain, following a drying stage, a powder comprising more than 99.3 % of the base constituent, in weight per cent in relation to the dry material.
IPC 8 full level
B01J 21/06 (2006.01); B01J 35/02 (2006.01); B01J 37/03 (2006.01); B01J 37/06 (2006.01); C01G 25/02 (2006.01)
CPC (source: EP)
B01J 21/06 (2013.01); B01J 21/066 (2013.01); B01J 35/40 (2024.01); B01J 35/50 (2024.01); B01J 37/031 (2013.01); B01J 37/036 (2013.01); B01J 37/06 (2013.01); B82Y 30/00 (2013.01); C01G 25/02 (2013.01); C01G 27/02 (2013.01); C01G 39/02 (2013.01); C01G 41/02 (2013.01); C01P 2002/52 (2013.01); C01P 2002/72 (2013.01); C01P 2004/04 (2013.01); C01P 2004/10 (2013.01); C01P 2004/20 (2013.01); C01P 2004/32 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2004/80 (2013.01); C01P 2006/10 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01)
Citation (search report)
See references of WO 2009071862A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009071862 A2 20090611; WO 2009071862 A3 20091015; CN 101883632 A 20101110; EP 2231326 A2 20100929; TW 200932669 A 20090801
DOCDB simple family (application)
FR 2008052162 W 20081128; CN 200880118535 A 20081128; EP 08856976 A 20081128; TW 97146612 A 20081201