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采用湿法工艺 ,通过季铵盐与钠基膨润土 ,进行离子交换反应合成有机膨润土 .实验表明 ,以硫酸为活化剂 ,在控制反应温度为 55℃～ 65℃和反应时间为 90min的条件下 ,让适量的季铵盐与经钠化处理的膨润土浆液发生反应 ,然后过滤、洗滤和干燥反应产物 ,可以得到在有机介质中具有极好分散性和触变性的有机膨润土 .该产品可作为流变助剂和增稠剂应用于油漆、油墨、润滑脂、钻井油浆等领域 .
The organic bentonite was prepared by ion exchange reaction of quaternary ammonium salt and sodium bentonite by the wet process.The experimental results showed that when the reaction temperature was 55 ℃ ~ 65 ℃ and the reaction time was 90min, sulfuric acid was used as activator, An appropriate amount of quaternary ammonium salt is reacted with the sodium bentonite slurry and then the reaction product is filtered off, washed with water and dried to obtain an organobentonite having excellent dispersibility and thixotropy in an organic medium, Variable additives and thickeners used in paint, ink, grease, drilling slurry and other fields.