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Effect of Kaolinite and Sulfate on the Formation of Hydroxy-Aluminum Compounds
Bayerite CMS Clay KGa-2 Gibbsite Hydroxysulfate Noncrystalline Compounds Nordstrandite
2011/12/2
Abstract: OH-Al solutions were prepared by adding appropriate amounts of NaOH to AlCl3 to obtain OH/Al mole ratios of 2.0, 2.5, 2.7, 3.0, and 3.3 in the final suspension. Solid Na2SO4 and Georgia kaol...
Interactions of Citric Acid and Synthetic Hydroxy-Aluminum Montmorillonite
Adsorption Citric acid Hydroxy-Al Montmorillonite X-ray powder diffraction
2011/12/31
Hydroxy-Al-montmorillonite was prepared by mixing Na-Wyoming montmorillonite with Al(OH)2.5 polycations and aging the mixture for 10 days. The reactions of this complex with citric acid at millimolar ...
Use of Competitive Ion Exchange for Intercalation of Montmorillonite with Hydroxy-Aluminum Species
Competitive ion exchange Hydroxy-Al Intercalation Montmorillonite Pillared clays Thermal stability X-ray powder diffraction
2012/1/4
Three montmorillonite samples, from Wyoming (particle size <0.2 µm, 4.6 wt. % Fe2O3), Greece (<14 µm, 6.5 wt. % Fe2O3), and Poland (0.5 wt. % Fe2O3, two fractions <2 µm and 2–10 &mic...
Dioxon Sorption by Hydroxy-Aluminum-Treated Clays
Adsorption Biphenyl Dioxin Hydroxy-Al Kaolinite Pollutant Smectite
2012/1/6
The treatment of smectites with a hydroxy-Al polymer produced chemically modified clays that had much greater affinities for chlorinated dioxins and biphenyls than untreated clays. For hydroxy-Al-trea...
Sintering of Montomorillonites Pillared by Hydroxy-Aluminum Species
Calcination Hydroxy-Al Infrared spectroscopy Montmorillonite Mossbauer spectroscopy Pillared interlayer complex Thermal stability
2012/1/9
The sintering of montmorillonites pillared by hydroxy-Al species was investigated by several techniques. The change of the microporosity of the pillared interlayer clay with temperature shows that sin...
Preparation and Characterization of Bidimensional Zeolitic Structures Obtained from Synthetic Beidellite and Hydroxy-Aluminum Solutions
Acid sites Beidellite Hydroxy-Al Infrared spectroscopy Nuclear magnetic resonance Pillaring Synthesis
2012/1/11
Beidellite was synthesized hydrothermally from a noncrystalline gel at 320°C and 130 bar pressure. The beidellitic character of the product was verified by infrared spectroscopy on the NH4+-exchanged ...
Chemisorption of Copper on Hydroxy-Aluminum-Hectorite: An Electron Spin Resonance Study
Adsorption Aluminum Copper Electron spin resonance Hectorite Hydroxy-aluminum complex
2012/2/6
Copper adsorption on a hydroxy-aluminum-hectorite complex (OH-Al-hectorite) at pH 4.5, 5.7, 7.4, and 7.8 was examined by means of electron spin resonance. The spectra of these samples were compared to...
Cross-Linked Smectites. III. Synthesis and Properties of Hydroxy-Aluminum Hectorites and Fluorhectorites
Cross-linking Fluorhectorite Hectorite Hydroxyaluminum Molecular sieve Surface area Synthesis Thermal stability
2012/2/2
Interaction of La3+ and Ce3+-exchanged hectorites with oligomeric hydroxy-Al cations results in the formation of cross-linked hectorites possessing moderately high surface areas (∼220–280 m2/g) ...
Cross-Linked Smectites. II. Flocculation and Microfabric Characteristics of Hydroxy-Aluminum-Montmorillonite
Aluminum Flocculation Heterocoagulation Ligand Lithium Montmorillonite
2012/2/10
Cross-linking of Li-montmorillonite by hydroxy-aluminum oligomers was performed in a specially constructed mixing apparatus. Observations on flocculation and solution composition were carried out duri...
Cross-Linked Smectites. I. Synthesis and Properties of Hydroxy-Aluminum-Montmorillonite
Aluminum Electrostatic Hydroxide Oligomer Montmorillonite
2012/2/10
A stable porous system consisting of montmorillonite cross-linked by Al-hydroxide oligomers was synthesized by reacting at room temperature an aqueous solution of such oligomers with a unit-layer disp...
Swelling Characteristics of Hydroxy-Aluminum Interlayered Clays
Hydroxy-Aluminum Interlayered Clays Swelling Characteristics
2011/11/17
Abstract: The hypothesis tested was that macroscopic swelling of montmorillonitic clays is reduced by the presence of interlayer minerals. Fine and coarse clay fractions of Camargo and Panther Greek b...
Heterogeneity of Montmorillonite Surface and Its Effect on the Nature of Hydroxy-Aluminum Interlayers
Heterogeneity Montmorillonite Surface Nature Hydroxy-Aluminum Interlayers
2012/2/21
A specimen montmorillonite (Arizona bentonite) was treated with hydroxy-aluminum solutions of various basicity. The cation exchange sites of this clay were found not to be homogeneous in their strengt...