Abstract: A method for the manufacture of ammonium sulfate is known which consist of the reaction of solid calcium sulfate with an aqueous solution of ammonium carbonate to give ammonium sulfate as product. The ammonium sulfate recovered as an aqueous solution, from which the ammonium sulfate can be obtained in the form of crystal by evaporation. This study deals with the design and operation of cooling and evaporation crystallizers and precipitators for reaction crystallization. The median crystal size of and the crystal size distribution of ammonium sulfate mainly depend on the crystallization kinetics and that these kinetics are controlled by supersaturation. Therefore, the main objective in crystallization and precipitation is to choose and to maintain the optimal supersaturation with respect to product quality at all times and all locations in the crystallizer
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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