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Preparation of Basic Silicates and Their Use as Supports or Catalysts
1991Abstract The utilization in catalysis of non-swelling basic silicates such as chrysotile and talc are briefly reviewed. Their preparations by hydrothermal synthesis for new applications in catalysis are described. They lead to original Co-Cu catalysts for alcohols synthesis from syngas and to Li/MgO-SiO 2 systems active in the oxidative coupling of ...
G MARTIN +4 more
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ChemInform Abstract: Basic Catalysts and Fine Chemicals
ChemInform, 1994AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Basic properties of molybdenum and tungsten nitride catalysts
Applied Catalysis A: General, 2005Abstract The basic and related properties of high surface area Mo2N and W2N catalysts were characterized using CO2-temperature programmed desorption (TPD), the decomposition and dehydration of 2-methyl-3-butyn-2-ol (MBOH), and changes in the reaction rates on the addition of CO2, a base site poison.
Randolph C.V. McGee +2 more
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Porous Silicon Nitride Materials as Basic Catalysts
Chemical Engineering & Technology, 2001Silicon nitride powders characterized by a high specific surface area were prepared by gas-phase ammonolysis of tetrachlorosilane. The compositions as well as the structural and textural properties of the materials were varied by the reaction conditions and the aftertreatment of the synthesis products.
D. Hullmann, G. Wendt, G. Ziegenbalg
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Studies on solid catalysts with a basic character I
Journal of Catalysis, 1963Abstract The acidic and basic properties of catalysts obtained by saturation of silica gel with various amounts of NaOH were investigated. The investigations were carried out on catalysts dried at 120 °C and roasted at 1000 °C. The strength of the superficial base was determined semiquantitatively from the adsorption of acidic indicators from ...
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Role of oxide catalysts basicity in selective oxidation
1992Abstract Rates of oxidative coupling and ammoxidation of some hydrocarbons are found to increase linearly with increasing the amounts of weak and moderate basic sites on a surface of oxide catalyst. Such a correlation indicates that hydrocarbon activation occurs via the C-H bond heterolytic dissociation under the attack of catalyst basic site ...
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Relationships between basicity and reactivity of zeolite catalysts
Research on Chemical Intermediates, 2000A wide variety of characterization methods, including UV-vis spectroscopy of adsorbed I2, microcalorimetry of CO2 adsorption, and x-ray absorption spectroscopy at the Cs LIII edge of zeolite cations, was applied to a series of alkali containing zeolites in order to elucidate the nature of the basic sites on these materials. In addition, three catalytic
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Modification Of The Acidity And Basicity Of The Surface Of Oxide Catalysts
1985The increase in the acidity of oxide surfaces is achieved by the deposition of atoms or groups of electron-acceptor character. The increase in basicity results from the deposition of donor elements. The deposition of H 3 PO 4 , PCI 3 , PCI 5 , P 2 O 5 brings about an increase in the acidity.
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Basic Solids as Catalysts for the Oxidative Coupling of Methane
1992In the oxidative coupling of methane to ethane, ethylene, and minor amounts of higher hydrocarbons (i.e., C2+ hydrocarbons) a large variety of solid metal oxide materials has been applied as catalysts; they may be loosely categorized as reducible and nonreducible ones.
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