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Citation: Li Xiao-Ping, Liu Zhi-Hong, Gao Shi-Yang, Hu Man-Cheng, Xia Shu-Ping. Kinetics of Dissolution and Transformation of Chloropinnoite in H3BO3 Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;2003, 19(07): 584-587. doi: 10.3866/PKU.WHXB20030703 shu

Kinetics of Dissolution and Transformation of Chloropinnoite in H3BO3 Aqueous Solution

1.
1Shool of Chemistry and Materials Science, Shaanxi Normal University, Xi’an　710062; 2The Second Part of Institue of Salt Lake, Chinese Academy of Sciences, Xi’an　710043

Received Date: 7 October 2002
Available Online: 15 July 2003

The kinetics of dissolution and transformation processes of 2M •2B2O3•MgCl2•14H2O in 4.5％ H3BO3 aqueous solution at 40 ℃ was studied. The liquid samples were taken at different times for chemical analysis. And the solid phase at different stages was separated and identified. The experimental results showed that 2M •2B2O3•MgCl2•14H2O dissolved congruently in 4.5％ H3BO3 aqueous solution, which was different from the process of the dissolution of 2M •2B2O3•MgCl2•14H2O in water. The final crystal solid phase was kurnakovite(2M •3B2O3•15H2O). The kinetic equations of the crystallization reaction were given with the aid of Simplex Optimum Method and Runge-Kutta digital solution of differential equation system, a mechanism of dissolution and transformation and the formation condition of kurnakovite in Qinghai-Tibetan plateau were proposed and discussed.
- Borochemistry;Chloropinnoite;Kinetics;Dissolution and transformation; Kurnakorite
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