Dissolution Kinetics of Calcined Ulexite in Ammonium Chloride Solutions at High Solid-to-Liquid Ratios

被引：0

作者：

GR Aycan ^{[1
]}

机构：

[1] Science & Art Faculty Department of Chemistry Yüzüncü Yιl University VAN-TURKEY

来源：

物理化学学报 | 2006年 / 10期

关键词：

Ulexite; Dissolution kinetics; High solid-to-liquid ratios; Ammonium chloride;

D O I：

暂无

中图分类号：

O643.1 [化学动力学];

学科分类号：

070304 ; 081704 ;

摘要：

The dissolution kinetics of calcined ulexite in ammonium chloride solutions at high solid-to-liquid ratios were investigated. In the experiments, calcination temperature, solution concentration, reaction temperature, and pre-hydration were chosen as parameters. It was observed that the dissolution rate increased with increasing calcination temperature, solution concentration, and reaction temperature, whereas it was not affected by pre-hydration. Employing graphical and statistic methods, the dissolution rate, based on homogeneous reaction model, can be given as: (1-X(B2O3))-1-1= k(c(NH4Cl))1.982t. The activation energy for the dissolution of the ulexite sample calcined at 160 ℃ was found to be 84.04 kJ·mol-1.

引用

页码：1287 / 1290

页数：4