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Abstrakty
Reaction-crystallization processes of hydroxyapatite precipitation from its diluted water solutions in the DTM-type crystallizers were discussed. A liquid jet-pump, working with an assumed minimal power of the feeding stream, was tested. It was concluded that the product crystal agglomerates within the 76-316 žm size range were obtained. It was observed that with the increase of Ca2+ ions concentration in a feeding solution the agglomeration phenomena are more pronounced, while the increase of the temperature and the enlargement of suspension residence time effectively restrain the agglomeration effects.
Czasopismo
Rocznik
Tom
Strony
25--27
Opis fizyczny
Bibliogr. 9 poz., rys., tab.
Twórcy
autor
autor
autor
autor
- Wrocław University of Technology, Institute of Inorganic Technology and Mineral Fertilizers, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, andrzej.matynia@pwr.wroc.pl
Bibliografia
- (1) Valsami-Jones E.: Recent scientific and technical developments: Calcium phosphate precipitation, Scope Newslett., 2001, 41, 8.
- (2) House W. A.: The physico-chemical conditions for the precipitation of phosphate with calcium, Environ. Technol., 1999, 20, 727.
- (3) Grzmil B., Wronkowski J.: Process for removing and recovering phosphates from wastewaters, Przem. Chem., 2004, 83, 275 (in Polish).
- (4) Matynia A., Koralewska J., Kwiecień J.: The influence of continuous crystallization process parameters on the crystal size distribution of hydroxyapatite, Pol. J. Appl. Chem., 2002, XLVI, 81.
- (5) Matynia A., Koralewska J., Piotrowski K.: The influence of the process parameters on the hydroxyapatite continuous crystallization kinetics, Pol. J. Chem. Technol., 2005, 7, 1, 44.
- (6) Matynia A.: Crystallizers with a jet pump, Inż. Ap. Chem., 1997, 36, 6, 9 (in Polish).
- (7) Matynia A., Koralewska J., Wierzbowska B., Piotrowski K.: Jet-pump crystallizers in the reaction crystallization processes of sparingly soluble salts, Pol. J. Chem. Technol., 2005, 7, 3, 56.
- (8) Matynia A., Wierzbowska B., Koralewska J., Piotrowski K., Bechtold Z., Ćwiertnia E.: DTM type crystallizer with jet pump in reaction crystallization processes. A novel efficacious approach, Chemistry for Agriculture, 2005, 6, 879.
- (9) Rojkowski Z., Synowiec J.: Krystalizacja i krystalizatory, WNT, Warszawa, 1991
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPS2-0039-0040