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Crystallization of ammonium aluminium sulphate
Hostomský, Jiří ; Hostomská, Věra
The report deals with research and development of the process for production of extra pure ammonium aluminium sulphate by crystallization from solution. In the pilot plant, the crystallization experiments were carried out with the solution volume of 50 litres. The distribution of contaminants (Na, K, Fe, Si, Ca, Cr, Mg, Ti, Ga, Mn, Zn, Co, Pb a Cu) between the crystalline phase and solution was determined. The heat balance of the crystallization process was evaluated.
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Crystallization of ammonium aluminium alum
Hostomský, Jiří ; Hostomská, Věra
The report deals with the research and development of the process for production of extra pure ammonium aluminium sulphate by crystallization from solution. The distribution of contaminants (Na, K, Fe, Si, Ca, Cr, Mg, Ti, Ga, Mn, Zn, Co, Pb a Cu) between the crystalline phase and solution was determined for two initial concentrations of ammonium aluminium sulphate and for two final crystallization temperatures. The effect of recrystallization of ammonium aluminium sulphate and the effect of the excess of ammonium ions upon the product purity was investigated.
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Research and development of the process for production of extra pure ammonium aluminium sulphate II
Rodová, A. ; Hora, L. ; Bezucha, P. ; Synek, V. ; Kokšal, J. ; Hodslavská, J. ; Hostomský, Jiří ; Hostomská, Věra
295 Research and development of the process for production of extra pure ammonium aluminium sulphate, where the concentration of contaminants does not exceed 0.3 ppm for Ca, Co, Cr, Fe, Mg, Mn, Pb, Si, Ti, Zn, 2.0 ppm for Ga and Na and 3.0 ppm for K. Preparation of ammonium aluminium sulphate (alum) solution by dissolution of aluminium hydroxide in sulphuric acid solution and by addition of ammonia. Purification of alum by crystallization and recrystallization.
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Research and development of the process for production of extra pure ammonium aluminium sulphate I
Rodová, A. ; Wildnerová, M. ; Janoš, P. ; Bezucha, P. ; Domský, V. ; Hostomský, Jiří ; Hostomská, Věra ; Velická, Jana
Research and development of the process for production of extra pure ammonium aluminium sulphate, where the concentration of contaminants does not exceed 0.3 ppm for Ca, Co, Cr, Fe, Mg, Mn, Pb, Si, Ti, Zn, 2.0 ppm for Ga, and Na and 3.0 ppm for K. Evaluation of suitable raw materials; analytical methods for determination of contaminant concentrations; determination of phase equilibria in the system sulphuric acid ů ammonium sulphate ů aluminium sulphate ů water.
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