Continuous flow process for manufacturing surface modified metal oxide nanoparticles by supercritical solvothermal synthesis
AssigneesEssilor International (Compagnie General d'Optique), Nikon Corporation, Centre National de la Recherche Scientifique (CNRS)
InventorsManuel THEODET, Cyril AYMONIER
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Abstract
The invention concerns a continuous flow process for manufacturing surface modified metal oxide nanoparticles by supercritical solvothermal synthesis in an reaction medium flowing within a continuous flow chamber, said continuous flow chamber containing a hydrolysis area and a supercritical area, said process comprising the introduction of a flow of metal oxide precursor into the continuous flow chamber at a point P located in the hydrolysis area or in the supercritical area, and the introduction of a flow of is located downstream of P1 with respect to the flow direction, as well as the device for carrying out this process.
Claims19
A continuous flow process for manufacturing surface modified metal oxide nanoparticles by supercritical solvothermal synthesis in a reaction medium flowing within a continuous flow chamber, said continuous flow chamber containing two areas:
- a hydrolysis area where the reaction medium is not in supercritical state and conditions are such that nucleation and growth of metal oxide nanoparticles can be initiated;
- and
- a supercritical area where the reaction medium is in supercritical state and the supercritical solvothermal synthesis of metal oxide nanoparticles can be performed,
- said process comprising the introduction of a flow of metal oxide precursor into the continuous flow chamber at a point P1 located in the hydrolysis area or in the supercritical area, and the introduction of a flow of surface modifier into the continuous flow chamber at a point P2 located in the hydrolysis area or in the supercritical area,
- wherein P2 is located downstream of P1 with respect to the flow direction.
Dependencies are inferred from the claim text.