The influence of the process parameters on the hydroxyapatite continuous crystallization kinetics

Matynia, A.; Koralewska, J.; Piotrowski, K.

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Tytuł artykułu

The influence of the process parameters on the hydroxyapatite continuous crystallization kinetics

Autorzy

Matynia A. , Koralewska J. , Piotrowski K.

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Abstrakty

The results of the mass crystallization kinetics of the process of calcium ions precipitation with the use of ammonium dihydrogenphosphate NH4H2PO4 in water under alkaline conditions (pH = 9) are presented. The experiments were carried out in the continuous laboratory DTB MSMPR (Draft Tube Baffle, Mixed Suspension Mixed Product Removal) crystallizer with the internal circulation of the suspension. The influence of calcium ions concentration in the feed stream, the temperature and the residence time on the nucleation and the growth rates of hydroxyapatite crystals formed, was established. The kinetic parameters were evaluated from the crystal size distributions employing selected SDG (Size Dependent Growth) models.

Słowa kluczowe

hydroxyapatite (HAP) precipitation reaction crystallization ammonium dihydrogenphosphate DTB MSMPR crystallizer Size Dependent Growth (SDG)

hydroksyapatyt strącanie krystalizacja

Wydawca

West Pomeranian University of Technology. Publishing House

Czasopismo

Polish Journal of Chemical Technology

Rocznik

2005

Tom

Vol. 7, nr 1

Strony

44--53

Opis fizyczny

Bibliogr. 43 poz., tab., rys.

Twórcy

autor

Matynia A.

andrzej.matynia@pwr.wroc.pl

Wrocław University of Technology, Institute of Inorganic Technology and Mineral Fertilizers, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

autor

Koralewska J.

Wrocław University of Technology, Institute of Inorganic Technology and Mineral Fertilizers, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

autor

Piotrowski K.

Silesian University of Technology, Department of Chemical & Process Engineering, Gliwice, Poland

Bibliografia

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Bibliografia

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