用溴仿酒精溶液分离膨润土中的蒙脱石

Separation of Montmorillonite from Bentonite with an Alcoholic Mixture of Bromoform

一、引言。膨润土的一系列重要物理化学性质、使用性能(例如铸造生产中型砂的工艺性能、石油钻井泥浆等)主要由膨润土中的蒙脱石矿物含量所决定。有人通过试验证明,膨润土中的蒙脱石含量与型砂的湿压强度呈正相关关系。所以,除了鉴别膨润土的类型是属于钙基或是钠基等外。

Bentonite quality depends largely on its content of montmorillonite.Method of methylene blue adsorption has been used usually to estimate the approximate montmorillonite content.But the heavey liquid separation method is considered to be the most precision process to separate the montmorillonite from other minerals.The specific gravity of alcoholic bromoform mixture,the speed and types of centrifugal equipment and other technical parameiers were studied in detail.An optimum testing procedure is described in this paper.More than 10 chinese bentonites have been separated,and the contents of montmorillonite have been determined.A new coefficient of methylene blue adsorption for bentonite is found by comparing them with those of the methylene blue adsorption.It is considered in this paper,that this new method is important for examing the quality of bentonite.The above method is technically practical not only for fon-dry industry but also for geologic examination.