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Infrared Spectroscopic Study of the Formamide-Na-Montmorillonite Complex. Conversion of s-Triazine to Formamide
Formamide Herbicide Hydrolysis Infrared spectroscopy Intercalation Montmorillonite s-Triazine
2012/1/12
The adsorption and degradation on montmorillonite of s-triazine, the parent compound of a major group of triazine-based herbicides, were studied by Fourier-transform infrared spectroscopy. The origina...
Methyl t-Butyl Ether (MTBE) Production: A Comparison of Montmorillonite-Derived Catalysts with an Ion-Exchange Resin
Amberlyst 15 Catalysis Chlorhydrol Ion-exchange resin Methyl t-butyl ether Montmorillonite
2012/1/13
Montmorillonite-based catalysts were compared with an acidic ion-exchange resin of the type used industrially for the production of methyl t-butyl ether (MTBE) from methanol and isobutene or t-butanol...
Dehydration of K-Exchanged Montmorillonite at Elevated Temperatures and Pressures
Dehydration Differential thermal analysis Enthalpy Montmorillonite Potassium Pressure
2012/1/12
The dehydration temperature of K-montmorillonite, obtained by ion exchange of a Na-montmorillonite, was determined at pressures to 2 kbar, using high-pressure differential thermal analysis. Dehydratio...
Infrared Studies of 1-Hexene Adsorbed onto Cr3+-Exchanged Montmorillonite
Adsorption Alkene Catalysis Chromium Hexene Infrared spectroscopy Water
2011/11/25
Abstract: When 1-hexene was adsorbed by Cr3+-montmorillonite at room temperature, all evidence of C=C(str) vibrations was lost. Protonation of the alkene occurred, and the secondary carbocation formed...
Adsorption of Dimethylanilines on Montmorillonite in High-Pressure Liquid Chromatography
Adsorption Bentonite Dimethylaniline Liquid chromatography Silica
2012/2/1
High-pressure liquid chromatography columns were packed with quasi-spherical particles of bentonite (SP-bentonite) which were prepared from a predominantly Na-bentonite powder by spray drying. The str...
Review of the Diffusion of Water and Pyridine in the Interlayer Space of Montmorillonite: Relevance to Kinetics of Catalytic Reactions in Clays
Catalysis Diffusion Interlayer space Kinetics Montmorillonite Pyridine Water
2012/2/1
With the current interest in the use of transition metal-exchanged phyllosilicates as catalysts for novel organic syntheses, investigations into the factors which affect the movement of reactant, prod...
Hydrolysis Kinetics of Organic Chemicals on Montmorillonite and Kaolinite Surfaces as Related to Moisture Content
Humic acid Hydrolysis kinetics Kaolinite Montmorillonite Surface acidity Water
2011/11/25
Abstract: The effect of the surface acidity of montmorillonite and kaolinite on the hydrolysis rate constants of different agricultural chemicals was studied at variable moisture contents. Ethyl aceta...
X-Ray Diffraction Study of Aqueous Montmorillonite Emulsions
Emulsion Layer stacking Low angle scattering Montmorillonite Water X-ray diffraction
2012/2/6
An X-ray diffraction study of aqueous emulsions of a Na-montmorillonite shows that: (1) At low water content, the d-spacings of the montmorillonite increased stepwise with increasing water content; (2...
Tris(Acetylacetonato)Silicon(IV) Binding to Montmorillonite and Hydrolysis to Interlayer Silicic Acid
Hydrolysis Montmorillonite Pillared interlayer complex Si(acac)3+ Silicic acid
2012/2/2
The reactions of the tris(acetylacetonato)silicone(IV) cation (Si(acac)3+) with Na+-, Mg2+-, and Co2+-exchange forms of hectorite and montmorillonite have been investigated to understand better the fo...
Surface Potentials Derived from Co-Ion Exclusion Measurements on Homoionic Montmorillonite and Illite
Co-ion exclusion Double-layer potential Illite Montmorillonite Surface charge
2012/2/3
Simple equations are presented which allow double-layer potentials of clays to be derived from co-ion exclusion measurements in monovalent and divalent electrolyte solutions. These equations have been...
Physicochemical Properties of Montmorillonite Interlayered with Cationic Oxyaluminum Pillars
Catalysis Interlayering Molecular sieve Montmorillonite Oxyaluminum Pillar
2011/11/23
Abstract: By ion exchanging expandable clay minerals with large, cationic oxyaluminum polymers, 損illars?were introduced that permanently prop open the clay layers. On the basis of thermal, infrared sp...
Infrared Spectra of Thiolane and Tetramethylene Sulfoxide Adsorbed on Montmorillonite
Adsorption Infrared spectroscopy Montmorillonite Tetramethylene sulfoxide Thiolane
2011/11/25
Abstract: Infrared spectra (4000–1200 cm−1) were obtained for several homoionic montmorillonite films on which tetramethylene sulfoxide (TMSO) or thiolane were adsorbed at various temperatures a...
Hydration State of Cu2+ in Mixed Cu2+-Hexadecylpyridinium Montmorillonite by Electron Spin Resonance
Cation exchange Copper Electron spin resonance Hexadecylpyridinium Hydration Montmorillonite
2012/2/6
Electron spin resonance (ESR) spectra of Cu2+-hexadecylpyridinium (HDP) montmorillonites were investigated as a function of HDP+ content and the hydration state of Cu2+ at relative humidities of p/p0 ...
Reactions of Alcohols with Alkenes over an Aluminum-Exchanged Montmorillonite
Alcohol Alkene Aluminum Catalyst Montmorillonite
2012/2/6
The reaction of 2-methyl pent-2-ene with primary alcohols (C1-C18) at 95°C over an Al-montmorillonite gave yields of 20–90% of ethers of the type R-O-C(CH3)2C3H7. Lower yields were produced if seconda...
Interlayer Cations as Reaction Directors in the Transformation of Limonene on Montmorillonite
Catalysis Cation Disproportionation Isomerization Limonene Montmorillonite
2012/2/6
Clays may catalyze chemical reactions by acting as Br鰊sted acids, Lewis acids, and/or Lewis bases. The changes occurring when limonene (p-menthadiene) is heated in the presence of montmorillonite illu...