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purifiTONion of raw bentonite

A simple method for physical purification of bentonite

2016-1-1  Purification of raw bentonite The purification process includes grinding, dispersion and centrifugal separation. The raw bentonite was ground firstly for a certain time with an universal grinder.

A simple method for physical purification of bentonite

The purification of raw bentonite was prepared by the method of Gong et al [1]. The raw bentonite was ground firstly with a universal grinder.

A simple method for physical purification of bentonite

The particle size of raw bentonite decreases with increasing the grinding time but it is needed to stay within a certain range to avoid excessive grinding that hinders the purification. A suitable amount of dispersant can change the surface potential of minerals and enlarge the flottability and stability differences between montmorillonite and impurities, which is important for their separation by aqueous


2016-6-1  Powder samples were prepared by putting blocks of bentonite into acetone to remove water without mechanical crushing. The powdered, acetone-dried bentonite was purified by a dispersion-sedimentation method in water after cation exchange of the interlayer Ca 2+ ion with Na + ion by the reaction of raw bentonite with aqueous NaCl. The purification was evaluated using X-ray diffraction

US3865240A Purification of bentonite Google Patents

Finely comminuted, crude bentonite may be purified of accompanying quartz, muscovite, illite, feldspar, iron oxide and like impurities by pouring an aqueous slurry of the clay into a very dilute aqueous solution of a technical grade of sodium hexametaphosphate, and letting the mixture stand a few minutes, whereby almost the entire mineral impurities present are precipitated.

Bentonite by purification, sodium, after modification to

2013-11-24  he experimental results show that, purifying bentonite can be less than 10 micron size of montmorillonite by hydraulic cyclone separator, the purification efficiency is greatly improved. Using sodium carbonate sodium modification of montmorillonite, can be prepared for sodium montmorillonite interlayer spacing of 12.4754A, the preparation of organic montmorillonite raw material requirements.

Improvement of Locally Available Raw Bentonite for

There is a need to either activate or add some polymer to upgrade the raw Na-Ca bentonite and even to Ca-bentonite to meet the American Petroleum Institute (API)

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CFR Code of Federal Regulations Title 21

2020-4-1  Depending on the cations present, natural deposits of bentonite range in color from white to gray, yellow, green, or blue. Bentonite's fine particles provide large total surface area and, hence,...