Title of article
Effect of NaOH on aragonite precipitation in batch and continuous crystallization in causticizing reaction
Author/Authors
Konno، نويسنده , , Haruo and Nanri، نويسنده , , Yasunori and Kitamura، نويسنده , , Mitsutaka، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
7
From page
15
To page
21
Abstract
In order to obtain CaCO3 crystals with high aragonite content in the causticizing reaction in the paper industry, the effect of the NaOH addition at various temperatures was investigated using a batch operation. It is apparent that the NaOH addition increased aragonite composition in the crystal at all temperatures investigated. Then, aragonite crystallization was investigated using a continuous operation. In the continuous operation, it appeared that the dominant factor for the aragonite formation is the low molar ratio of Na2CO3 to Ca(OH)2. The lower supersaturation and the higher ratio of [Ca2+]/[CO32−] in the presence of NaOH are advantageous to precipitate aragonite in the causticizing reaction.
Keywords
Aragonite , crystallization , Causticizing reaction , Continuous operation , Supersaturation , batch operation
Journal title
Powder Technology
Serial Year
2003
Journal title
Powder Technology
Record number
1692096
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