Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

Influence of admixtures and of mixing on precipitation of Mg(OH)2 from nitrate solution

Pavel Fellner *, Eva Smrčková, Ladislav Pach

Institute of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology, SUT, Radlinského 9, 812 37 Bratislava, Slovakia

E-mail: *

Abstract: Precipitation of Mg(OH)2 from magnesium nitrate solution was studied by means of recording pH of the reacting mixture. Solution of NH4OH was used as the alkalizing agent. The sequence of addition of reactants, rate and time of stirring, and the excess of NH4OH with respect to stoichiometry influence change in pH, and consequently the rate of crystallization and sedimentation of the reaction product, viz. Mg(OH)2. The presence of calcium nitrate up to 10 mass % does not influence remarkably the precipitation process.

Keywords: magnesium hydroxide, ammonium nitrate, calcium nitrate, rate of precipitation

Full paper in Portable Document Format: acs_0043.pdf

Acta Chimica Slovaca, Vol. 2, No. 2, 2009, pp. 14—20