Controlled precipitation of an inorganic compound in solution using a polymeric matrix

Martha Gellner (1, 2, 3) , Ana Cameirão (1, 2, 3) , Eric Serris (2, 3, 4) , Frédéric Gruy (1, 2, 3)

1 GENERIC-ENSMSE - Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation
2 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
3 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
4 ProcESS-ENSMSE - Département Procédés et évolution des systèmes avec solides

Precipitation of strontium molybdate was performed from aqueous solutions of sodium molybdate and strontium chloride in presence of hydroxypropylmethylcellulose. Three experiments were conducted: without cellulose, with dissolved cellulose and with a tablet containing cellulose and strontium chloride powder. The first one results in agglomerates of bipyramidal crystals, the second one in smaller monosized bipyramidal crystals and the last one in a mixture of bipyramidal, spherical, ellipsoidal particles and their agglomerates. Explanations based on the effect of solution viscosity are proposed.

Mots clés: Release; dissolution; precipitation; morphology

Domaines: Génie des procédés

Martha Gellner, Ana Cameirão, Eric Serris, Frédéric Gruy. Controlled precipitation of an inorganic compound in solution using a polymeric matrix. XII ° Congrès de la Société Française de Génie des Procédés Pour relever les défis industriels du XXI° siècle A la croisée des Sciences et des Cultures, Oct 2009, Marseille, France. ⟨hal-00460275⟩