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SEM images of (a, b) raw bentonite and (c, d) cinnamic acid modified bentonite. Material Studio 6.0 (Accelrys, San Diego, CA, USA) software was used to describe
Bentonite clay is one of the oldest clays that humankind has been using from ancient times as traditional habits and remedies. In recent years researchers have found many applications of bentonite clay due to its various physio-chemical properties. In the present work, various physical and chemical properties of bentonite such as surface area, …
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 …
The raw bentonites were purified using sedimentation and centrifugation techniques prior to preparation of the organo-bentonite. The purification results were evaluated in light of X-ray diffraction (XRD), cation exchange capacity (CEC), free swelling volume (FSV), X-ray fluorescence (XRF), and particle-size analysis data.
Bentonite, with montmorillonite as the base clay, was modified with hexadecethyltrimethylammonium bromide (a cationic surfactant) in the amount of 1.0 cation exchange capacity (CEC) of bentonite ...
Purification of raw bentonite2.2.1. Method-I: simple sedimentation using (Na (PO 3)) 6 as a dispersing agent. 5 g of bentonite was added to 1 L deionized water containing 0.25 g (Na (PO 3)) 6 as a dispersing agent and stirred for about 1 h. The dispersion was placed undisturbed at 25 °C and after 15 h, the supernatant above 10 cm …
Dry method. The dry method is to have been ground to a certain fineness of the bentonite ore and air fully mixed into the fluidisation; in the classification wheel centrifugal force and fan pumping force, most of the coarse particles and specific gravity of the particles and fine-grained minerals separated from the purification process—Wang et al. purified low …
Purification of Bentonite. ... A significant weight loss is observed in the raw bentonite in the range between 325 and 720°C, with a maximum at 350°C, which can be attributed to the dehydroxylation of the clay minerals present in the clay, whereas, for the activated bentonite, the weight loss has taken place in a smaller range, from 410 to ...
The raw bentonites were purified using sedimentation and centrifugation techniques prior to preparation of the organo-bentonite. The purification results were …
The physical purification of bentonite was performed according to Hassan and Abdel-Khalek (1998). Raw bentonite was crushed by primary jaw crusher to 5 ml and treated using attrition scrubber at impeller speed 2500 rpm and solid concentration 50% for 1 h. The treated product was transferred into Mozley-2-hydrocyclone with adjusting the ...
The raw bentonites were purified using sedimentation and centrifugation techniques prior to preparation of the organo-bentonite. The purification results were evaluated in light of X-ray diffraction (XRD), cation exchange capacity (CEC), free swelling volume (FSV), X-ray fluorescence (XRF), and particle-size analysis data.
The present study deals with modeling of the effects of processing temperature (30–95 °C), concentration of Bentonite (Bent) (1–5 g/L) and pH (3.5–6) on color, turbidity, purity, ash and invert sugar content of purified raw sugar-beet juice.The used methodology was the face central composite design of response surface to …
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 …
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.
Mineralogical data proved that the raw bentonite is mainly composed of smectite and illite with small quantities of gangue minerals such quartz, feldspars …
Raw bentonite clay cannot directly have applied in catalysis it needs to be activated. The activation of bentonite results in an increase in the number of active sites, increase the pore volume, increase the surface area, etc. ... temperature and purification. Features of bentonite. Features of bentonite are found as, economically viable ...
The raw bentonite contained feldspar, quartz, and cristobalite, and feldspar and quartz were removed by the new purification procedure. The purification was evaluated quantitatively by comparing ...
Nowadays, due to the most application of montmorillonite, its purification from raw bentonite has great importance. More than 76% of bentonite is composed of montmorillonite, and its industrial ...
A bentonite with 44% montmorillonite was purified adopting a simple method. Purified bentonite with montmorillonite content of 96.5% and montmorillonite yield of 70% was obtained. Appropriate grinding of raw bentonite and dispersant are very important …
Comparative XRD diagram of raw bentonite and of purified sodium exchanged bentonite actually confirms a good purification of bentonite by comparison of the lines with the (001) peak. A shift in the position of the (001) line from 14.3 to 12.7Å, which shows that the exchange between calcium and sodium was produced.
DOI: 10.1246/cl.220499 Corpus ID: 257196739; Separation and Purification of Montmorillonite from Raw Bentonite Using a Simple Hydrothermal Treatment @article{Yoshikawa2023SeparationAP, title={Separation and Purification of Montmorillonite from Raw Bentonite Using a Simple Hydrothermal Treatment}, …
Raw and modified bentonite has been used to develop effective sorbents to remove phosphate from aqueous solution. Acid thermoactivation, Rewoquate, Irasoft, calcium, Fe and Al were employed to treat the bentonite. Results show that samples adsorption capacity for phosphate is in the order of, unmodified bentonite = acid thermoactivation ...
The results of elemental analysis of the raw bentonite were presented in Table 1. The raw bentonite showed a higher content of calcium compared to sodium, and thus it indicated the presence of calcium bentonite. Montmorillonite was a three-layered sheet of alumino-silicate mineral (Figure 4). Hence, silicone and aluminum comprised higher than ...
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 ...
The purification was evaluated using X-ray diffraction and thermogravimetric analyses (TG). The raw bentonite contained feldspar, quartz, and cristobalite, and feldspar and quartz were removed by the new purification procedure. The purification was evaluated quantitatively by comparing the TG data before and after the purification. The …
The purification of the raw bentonite In the case of the physical purification method, Mt particles (size fractions <2 μm) were separated by centrifugation ( Thuc et al., 2010 ). Typically, 10 g of the raw bentonite dried at 110 °C for two hours was dispersed in 0.20 L of deionized water and mixed for 24 h.
The purification was evaluated using X-ray diffraction and thermogravimetric analyses (TG). The raw bentonite contained feldspar, quartz, and cristobalite, and feldspar and quartz were removed by the new purification procedure. The purification was evaluated quantitatively by comparing the TG data before and after the purification. The …
A simple physical method composed of grinding, dispersion and centrifugation was adopted to purify a low-grade bentonite from Zhejiang, China. This experiment …
Purification of raw Egyptian bentonite clay used for preparation of bentonite clay nanocomposites as its high content of montmorillonite. Purification was done by four steps; eliminate the ...
The bentonite was purified using solution of sodium-hexa-meta-phosphate (NaPO 3) 6, and was activated using acid reflux methods (H2SO 4, 100oC). The bentonite activation …
Raw bentonite with the following physicochemical properties was used: surface area of 45 m 2.g −1, mean pore diameter of 7.7 nm, total pore volume of 0.0898 cm 3.g −1, swelling index of 15 mL/2 g, and CEC of 58 meq/100 g. Residual olive oil was purchased from an olive oil refinery and its FFA profiles and physical properties were …
The powdered, acetone-dried bentonite was purified by a dispersion-sedimentation method in water after cation exchange of the interlayer Ca2+ ion with Na+ ion by the …
Results Mineralogical data proved that the raw bentonite is mainly composed of smectite and illite with small quantities of gangue minerals such quartz, feldspars (orthoclase and albite) and calcite .
Nowadays, due to the most application of montmorillonite, its purification from raw bentonite has great importance. More than 76% of bentonite is composed of montmorillonite, and its industrial ...