Results 211 to 220 of about 63,695 (265)
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Heterogeneous basic catalysts for biodiesel production
Catalysis Science & Technology, 2016We review the recent advances in the synthesis and utilization of heterogeneous basic catalysts for biodiesel production.
Ana Lúcia de Lima +2 more
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Microcalorimetric characterisation of acid–basic catalysts
Catalysis Today, 1998Abstract Fundamentals of microcalorimetry are briefly reviewed. A heat-flow microcalorimeter of the Tian–Calvet type has been used to obtain information on the differential molar enthalpy of adsorption. Ammonia, pyridine, n-butylamine or CO2 and SO2 have been used to characterize the acid–base properties of several catalysts such as zeolites and ...
Vincenzo Solinas, Italo Ferino
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Design and fabrication of mesoporous heterogeneous basic catalysts
Chemical Society Reviews, 2015Recent advances in mesoporous solid bases were reviewed, and fundamental principles of how to fabricate efficient basic catalysts were highlighted.
Lin-Bing, Sun +2 more
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Glucose–fructose isomerisation promoted by basic hybrid catalysts
Catalysis Today, 2012As-synthesised mesoporous ordered molecular sieves of the M41S family, containing their organic template and used without any pretreatment, were shown to be efficient weak basic catalysts in glucose-fructose isomerisation in water at 100 degrees C. Selectivities higher than 80% were obtained for glucose conversion higher than 20%.
Souza, R. O. L. +5 more
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Basic evidences for methanol-synthesis catalyst design
Catalysis Today, 2009A series of Cu-ZnO/ZrO2 catalysts (Znat/Cuat, 0-3; ZrO2, 42-44 wt.%) with markedly improved total (SA, 120-180 m2/g) and metal surface area (MSA, 9-63 m2/g) has been synthesized via the reverse coprecipitation under ultrasound field. Structure, adsorption properties and surface reactivity were probed by BET, XRD, TPR, N2O-titration and TPD measurements
F Arena +5 more
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New perspectives on basic zeolites as catalysts and catalyst supports
Journal of Catalysis, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
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The Journal of Organic Chemistry, 2020
We report a highly efficient ortho-selective electrophilic chlorination of phenols utilizing a Lewis basic selenoether catalyst. The selenoether catalyst resulted in comparable selectivities to our previously reported bis-thiourea ortho-selective catalyst, with a catalyst loading as low as 1%.
Andrew N. Dinh +5 more
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We report a highly efficient ortho-selective electrophilic chlorination of phenols utilizing a Lewis basic selenoether catalyst. The selenoether catalyst resulted in comparable selectivities to our previously reported bis-thiourea ortho-selective catalyst, with a catalyst loading as low as 1%.
Andrew N. Dinh +5 more
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Methanolysis of triacylglycerols by organic basic catalysts
European Journal of Lipid Science and Technology, 2007AbstractMethanolysis of rapeseed and soybean oil was studied using organic basic catalysts at boiling with reflux. The molar ratio methanol/free fatty acids (FFA) amounted to approx 2.8 : 1. The catalyst (guanidine carbonate) is used at concentrations between 0.5 and 1.3 wt‐% with respect to the oil.
Siegfried Peter, Eckhard Weidner
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New Chiral Basic Heterogeneous Catalyst Based on Csβ Zeolite.
ChemInform, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Evgeniy V. Suslov +4 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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