Suspensions of kaolinite and ceramic grade kaolin in sodium hexametaphosphate solutions at different concentrations were prepared and kept at constant temperature for 4 h: the solutions obtained after centrifugation and filtration were analysed using a ICP technique to determine the concentration of significant cations. The results allowed to stress the role of NaHMP in the dissolution process of kaolinite and ceramic grade kaolin. The role of accessory minerals in ceramic grade kaolin dissolution was discussed in the light of the obtained data.
The role of sodium hexametaphosphate in the dissolution process of kaolinite and kaolin / Andreola, Nora Maria; Castellini, Elena; Manfredini, Tiziano; Romagnoli, Marcello. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - STAMPA. - 24:7(2004), pp. 2113-2124. [10.1016/S0955-2219(03)00366-2]
The role of sodium hexametaphosphate in the dissolution process of kaolinite and kaolin
ANDREOLA, Nora Maria;CASTELLINI, Elena;MANFREDINI, Tiziano;ROMAGNOLI, Marcello
2004
Abstract
Suspensions of kaolinite and ceramic grade kaolin in sodium hexametaphosphate solutions at different concentrations were prepared and kept at constant temperature for 4 h: the solutions obtained after centrifugation and filtration were analysed using a ICP technique to determine the concentration of significant cations. The results allowed to stress the role of NaHMP in the dissolution process of kaolinite and ceramic grade kaolin. The role of accessory minerals in ceramic grade kaolin dissolution was discussed in the light of the obtained data.
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