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On the kinetics of magnesia hydration in magnesium acetate solutions
Author(s) -
Filippou Dimitrios,
Katiforis Nikolaos,
Papassiopi Nymphodora,
Adam Katerina
Publication year - 1999
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199904)74:4<322::aid-jctb35>3.0.co;2-l
Subject(s) - magnesium , magnesium acetate , dissolution , precipitation , kinetics , chemistry , particle size , inorganic chemistry , nuclear chemistry , chemical engineering , organic chemistry , physics , quantum mechanics , meteorology , engineering
High‐quality magnesium hydroxide powders can be produced byhydrating slow‐reacting magnesia in dilute magnesium acetatesolutions. The kinetics of this process are very crucial for processdesign and control, and for the production of a powder with desirableparticle morphology. In this work, industrial heavily‐burnedmagnesia powders were hydrated in 0.01–0.1 mol dm −3 magnesium acetate solutions at temperatures ranging between 333and 363 K. Examination of the magnesium hydroxide produced and theanalysis of the kinetic data suggest that the hydration of heavilyburned magnesia in magnesium acetate solutions is adissolution–precipitation process controlled by the dissolutionof magnesia particles. The activation energy was estimated to be 60kJ mol −1 , while the reaction order with respect toacetate concentration was found to be about one. © 1999 Society of Chemical Industry