某钙基膨润土制活性白土和有机膨润土试验研究

Study on Preparation of Activated Bleaching Clay and Organic Bentonite for Calcium Bentonite

辽宁某膨润土为优质钙基膨润土,主要成分为绿脱石,其次为蒙脱石,杂质含量较低。试验以该膨润土为原料,对其进行了活化、有机化试验研究。研究表明,在活化酸度20%、活化时间4 h的条件下,可制备出脱色率达到99.3%的高效活性白土;采用适宜流程,在温度60℃、浆料浓度5%、有机化时间1 h及覆盖剂用量35%的条件下,制备出的有机膨润土在0号柴油中胶体率达到98%,表观粘度8.75 m Pa·S,性能较佳。

A bentonite in Liaoning Province is high quality calcium- group bentonite,main component is montmoronite and impurity content is low. Taking bentonite clay as raw material,the activation,organification and other experiments were carried about. The high quality activated bleaching clay was made of bentonites on the condition of acidity 20%,activation time over 4h. The decoloring ratio can reach 99. 3%. The excellent organic bentonite preparation was fulfilled under the condition of temperature 60 ℃,slurry concentration 5%,organising time 1hour and dosage of covering agent 35% by using appropriate flowsheet. The colloid ratio can reach 98% and the apparent viscosity can reach 8. 75 m Pa·S in the 0# diesel oil.