期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 48, 期 24, 页码 10877-10883出版社
AMER CHEMICAL SOC
DOI: 10.1021/ie900253f
关键词
-
In this paper the retardant effect of nitrilotrimethylenephosphonic acid (NTMP) on calcium Sulfate dihydrate nucleation kinetics is evaluated. by means of an optical technique able to accurately measure the induction period. A laboratory-scale experimental apparatus is used, in which sodium sulfate and calcium chloride are mixed to obtain a supersaturated calcium sulfate dihydrate solution; all experiments are carried out for various values of NTMP concentrations (0.005-0.05 g/L) in solution, while changing the saturation index in the range of 4.04 - 4.82; the temperature was varied in the interval 15-45 degrees C. Experimentally measured induction times are used to evaluate the interfacial tension (gamma s) between crystals and mother solution and to estimate the activation energy (E(att)) for precipitation in the presence of NTMP. The measured values of gamma s and E(att) are compared with those found in the absence of any additive and in the presence of citric acid, showing that NTMP is a very strong retardant for gypsum nucleation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据