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: Phenol and acetone are produced by the cleavage of cumene hydroperoxide in the presence of a solid heterogeneous catalyst with acidic activity comprising zeolite beta as discussed by the authors.
Abstract: Phenol and acetone are produced by the cleavage of cumene hydroperoxide in the presence of a solid heterogeneous catalyst with acidic activity comprising zeolite beta.
38 citations
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TL;DR: In this article, aldol condensation of acetaldehyde, acetone, and methyl ethyl ketone in the condensed phase was performed using a bi-functional aluminophosphate catalyst and it was found that increasing the number and strength of the basic sites while decreasing acid sites on the catalyst caused a reduction in yield of the condensation products.
Abstract: The aldol condensation of acetaldehyde, acetone, and methyl ethyl ketone, which represent model bio-oil compounds, in the condensed phase, was performed using a bi-functional aluminophosphate catalyst. It was found that increasing the number and strength of the basic sites while decreasing acid sites on the catalyst caused a reduction in yield of the condensation products. In contrast, the addition of organic acids such as acetic acid at low concentrations to the catalyst-containing reaction mixture was found to increase activity. The presence of both acid and base sites was found to be necessary and their relative number was important for both the activity and selectivity of the condensation reaction. A mechanism explaining the observed phenomena was proposed.
38 citations
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38 citations
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TL;DR: In this paper, the adsorption isotherms of acetone on ice were measured at 193, 203 and 213 K using a volumetric method with mass spectrometric detection.
Abstract: [1] The adsorption isotherms of acetone on ice were measured at 193, 203 and 213 K using a volumetric method with mass spectrometric detection. Henry's law applies for values of the acetone partial pressure, Pacetone, lower than 10−3 Pa. Where Henry's law applies, the number of acetone molecules adsorbed per cm2 of ice, is: nads = 90.53 × Pacetone × exp (6610.2/T), with Pacetone in Pa and T in K. The measured enthalpy of adsorption of acetone on ice is ΔHads = −55±7 kJ/mol. Acetone values previously measured in Arctic snow are too high to be due to adsorbed acetone. Acetone was then probably dissolved in ice or in organic aerosols contained in snow. Adsorption of acetone in the snowpack or on ice crystals in cirrus clouds is insufficient to affect Pacetone above the snow or in the clouds.
38 citations
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TL;DR: In this article, the reactivity ratios for the free radical copolymerization of styrene and methyl methacrylate at 50°C have been evaluated in dioxane, acetone and dimethylformamide solutions.
38 citations