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Batch Precipitation of Potash Alum Crystals by Mixing Aqueous Solutions of the Component Salts
Author(s) -
Mullin J.W.,
Žáček S.,
Nývlt J.
Publication year - 1982
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170170510
Subject(s) - supersaturation , potash , alum , precipitation , nucleation , chemistry , mixing (physics) , aqueous solution , potassium , crystal (programming language) , inorganic chemistry , crystal growth , yield (engineering) , chemical engineering , mineralogy , materials science , crystallography , metallurgy , organic chemistry , meteorology , physics , quantum mechanics , computer science , engineering , programming language
The effects of temperature, supersaturation, excess of reacting component salts and method of precipitation on the batchwise precipitation of potash alum crystals, by mixing aqueous solutions of potassium sulphate and aluminium sulphate, have been investigated. From the primary characteristics of the process (crystal size, size distribution and yield) relative crystal growth rates and relative nucleation rates are calculated and interrelation of these rates with the corresponding supersaturation leads to a value of the nucleation order. It is concluded that secondary nucleation plays an important role in the batch precipitation of potash alum crystals.