Centre National De La Recherche Scientifique

Université De Bourgogne

Centre National De La Recherche Scientifique-cnrs

Daniel Aymes

Hervé Muhr

Frédéric Bernard

Moustapha Ariane

Frédéric Demoisson

The present invention relates to a method for continuously preparing mineral particles by means of the thermolysis of mineral precursors in an aqueous medium, comprising contacting: a reactive flow, including mineral precursors at a temperature lower than the conversion temperature thereof; and a heat transfer flow that is countercurrent to said reactive flow and contains water at a temperature that is sufficient to bring the precursors to a temperature higher than the conversion temperature thereof, the mixture flow that results from said reactive flow and said heat transfer flow then being conveyed into a tubular reactor, inside of which particles are formed by gradually converting the precursors, and where the reactive flow and the heat transfer flow are placed in contact with each other inside a mixing chamber, inside of which the reactive flow and the heat transfer flow are fed by supply pipes having outlet cross-sections that are smaller than the maximum cross-section of said mixing chamber. The invention also relates to a device for implementing said method.

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Brazey en Plaine, France

Daniel Aymes