FACTORS AFFECTING THE SOLUBILITY OF GYPSUM. THE EFFECT OF LIME AND TEMPERATURE IN DIFFERENT MEDIA.

被引：0
|
作者：
Ghorab, Hanaa Y. [1 ]
Wassef, Marguerite [1 ]
Abou El Fetouh, Safaa H. [1 ]
机构：
[1] Ain Shams Univ, Dep of Chemistry,, Cairo, Egypt, Ain Shams Univ, Dep of Chemistry, Cairo, Egypt
来源：
Journal of Chemical Technology and Biotechnology, Chemical Technology | 1984年 / 34 A卷 / 08期
关键词：
Cement - Sodium compounds;
D O I：
10.1002/jctb.5040340809
中图分类号：
学科分类号：
摘要：
The effect of lime on the solubility of gypsum in water and in sodium hydroxide solution at 30, 60 and 100 degree C has been studied turbidimetrically and by means of X-ray diffraction analysis. Lime depressed the solubility of gypsum in water only slightly at 30 degree C and a rise of temperature minimized its effect until its complete elimination. In the absence of alkali the minimum sulfate ion concentration in a supersaturated lime solution and at temperatures in the range 30-100 degree C is about 1. 2 g dm** minus **3. In sodium hydroxide solution neither lime nor temperature played a significant role and the solubility of gypsum was clearly promoted. At temperatures in the range 30-100 degree C, 0. 5 g of gypsum dissolved in 100 cm**3 of 0. 2M NaOH solution.
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页码：464 / 467
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