METHOD OF REMOVING HYDROUS SILICA FROM BENTONITE

摘要

PROBLEM TO BE SOLVED: To provide a method of removing hydrous silica from bentonite that contains montmorillonite as a main component.SOLUTION: The method of removing hydrous silica from bentonite is provided that comprises the steps of: irradiating slurry with an ultrasonic wave after preparing the slurry by putting the bentonite and a sodium compound into distilled water or deionized water; adding the distilled water or the deionized water to the slurry irradiated with the ultrasonic wave to dilute the slurry and centrifuging the slurry; and drying a supernatant obtained through the centrifugation. The sodium compound is one selected from the group consisting of NaCO, NaHCOand (NaPO). Preferably, the sodium compound is added with a weight ratio in the range of 0.04 to 0.09 with respect to the bentonite.SELECTED DRAWING: Figure 1