Topic
Acetone
About: Acetone is a research topic. Over the lifetime, 9458 publications have been published within this topic receiving 120867 citations. The topic is also known as: propanone & dimethylketone.
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TL;DR: A fluorite prism vacuum spectrograph and hydrogen lamp were used to determine the 49 000 to 67 000 cm-1 absorption spectra of acetone and acetaldehyde in the vapor phase at 22°C as discussed by the authors.
Abstract: A fluorite prism vacuum spectrograph and hydrogen lamp have been used to determine the 49 000‐ to 67 000‐cm—1 absorption spectra of acetone and acetaldehyde in the vapor phase at 22°C
54 citations
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TL;DR: In this article, aldol condensation of furfural and acetone was studied in a batch reactor at 100°C, autogenous pressure and a reaction time of 2h.
Abstract: Potassium-containing BEA zeolites were prepared by ion-exchange from NH4-BEA with potassium nitrate aqueous solution or ion-exchange combined with impregnation. The samples were used as basic catalysts for aldol condensation of furfural and acetone studied in a batch reactor at 100 °C, autogenous pressure and a reaction time of 2 h. To establish a relationship between physico-chemical properties and catalytic behavior of BEA zeolites, the samples were characterized by XRD, N2 adsorption, FTIR, calorimetry, and TGA. The ion-exchanged K-BEA catalysts exhibited low activity in the aldol condensation because of a weak strength of intrinsic basic sites. In contrast, the samples prepared by ion exchange combined with impregnation possessed strong basic sites, plausibly K2O clusters, and demonstrated appreciable activity in the aldol condensation. TGA results proved that, in contrast to acidic zeolites, basic sites of impregnated BEA samples hardly contribute to the formation of heavy carbonaceous deposits during the reaction what could be advantageous for the stable behavior of catalysts.
54 citations
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TL;DR: The catalytic potential of zeolite H-beta in the hydration and isomerization of α-pinene was investigated in this paper, where the main product is the monocyclic alcohol α-terpineol (48%) though selectivity towards bicyclic terpenes is higher than observed for sulphuric acid (26% vs 5.5%).
Abstract: The catalytic potential of zeolite H-beta in the hydration and isomerization of α-pinene was investigated. In the presence of water the main product is the monocyclic alcohol α-terpineol (48%) though selectivity towards bicyclic terpenes is higher than observed for sulphuric acid (26% vs. 5.5%). When the isomerization is performed in pure acetone, a new compound forms by a novel C C coupling reaction between α-pinene and acetone. The product is identified as α-terpinyl acetone. This coupling seems to be a general reaction between α-pinene and ketones and is catalyzed exclusively by zeolite beta.
54 citations
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TL;DR: In this paper, the kinetics of the epoxidation of cis-stilbene were studied and which were shown to follow a simple second order rate law for all solvents studied.
54 citations
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TL;DR: In this paper, the parent aldehyde or ketone is converted into the parent ketone in good yield either by methyl iodide in moist acetone or by methyl fluorosulphonate and water in liquid sulphur dioxide.
Abstract: Thioacetals are converted into the parent aldehyde or ketone in good yield either by methyl iodide in moist acetone or by methyl fluorosulphonate and water in liquid sulphur dioxide.
54 citations