2006 Spring Meeting & 2nd Global Congress on Process Safety
(74c) The Effect of Ultrasound on Crystallisation-Precipitation Processes
Authors
John Dodds - Presenter, Ecole des Mines d'Albi
Fabienne Espitalier - Presenter, Ecole des Mines d'Albi
Olivier Louisnard - Presenter, Ecole des Mines d'Albi
Rene David - Presenter, Ecole des Mines d'Albi
Romain Grossier - Presenter, Ecole des Mines d'Albi
Myriam Hassoun - Presenter, Ecole des Mines d'Albi
Cendrine Gatumel - Presenter, Ecole des Mines d'Albi
Nathalie Lyczko - Presenter, Ecole des Mines d'Albi-Carmaux
This paper discusses the effects of ultrasound on the production of particles by precipitation and crystallisation. Examples are given from the formation of crystals of BaSO4, K2SO4, TiO2 and sucrose. It is shown that ultrasound reduces the induction time, narrows the width of the metastable zone and leads to the production of more, finer, and more uniform crystals in some cases. The reseaons for these effects of ultrasound on the nucleation of crystals are discussed and a possible mechanism is presented.