Studies on the Kinetics of Dissolution and Transformation of 2MgO center dot 2B(2)O(3)center dot MgCl2 center dot 14H(2)O in water at 60 degrees C

Authors
Liu, ZH Xia, SP Gao, SY
Citation
Zh. Liu et al., Studies on the Kinetics of Dissolution and Transformation of 2MgO center dot 2B(2)O(3)center dot MgCl2 center dot 14H(2)O in water at 60 degrees C, CHEM J CH U, 20(2), 1999, pp. 186-189
Citations number
4
Categorie Soggetti
Chemistry
Journal title
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN journal
02510790 → ACNP
Volume
20
Issue
2
Year of publication
1999
Pages
186 - 189
Database
ISI
SICI code
0251-0790(199902)20:2<186:SOTKOD>2.0.ZU;2-Q
Abstract
The kinetic of dissolution and transformation process of 2MgO . 2B(2)O(3) . MgCl2 . 14H(2)O in water at 60 degrees C was studied. The solution samples were taken at different time for chemical analysis. The solid phase at dif ferent stages was separated and identified. The experimental results show t hat 2MgO . 2B(2)O(3) . MgCl2 . 14H(2)O dissolved incongruently in water. Th e misproduct is MgO . B2O3 . 4H(2)O and Mg(OH)(2). The final inversion prod uct is pinnoite, MgO . B2O3 . 3H(2)O. The mechanism of dissolution and tran sformation was proposed and discussed. The kinetic equations of dissolution and crystallization were obtained.