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: In this paper, the hydrogenation of acetone in various solvents on Raney nickel was studied at different temperatures and concentrations, where the reaction rates were represented by a Langmuir-Hinshelwood type kinetic equation.
36 citations
TL;DR: In this article, the adsorption of isopropyl alcohol and acetone on zinc oxide was studied by an infrared technique, which revealed that the alcohol is dissociatively adsorbed at room temperature to form zinc alcoholate and hydroxyl group on the surface, while the acetone takes place in its enolic form.
Abstract: The adsorption of isopropyl alcohol and acetone on zinc oxide was studied by an infrared technique which revealed that isopropyl alcohol is dissociatively adsorbed at room temperature to form zinc alcoholate and hydroxyl group on the surface, while the adsorption of acetone takes place in its enolic form. When adsorbed isopropyl alcohol was heated to 363 K, the zinc alcoholate species changed gradually to acetone adsorbed in its enolic form, which further desorbed at higher temperatures as acetone, being replaced by the attacking isopropyl alcohol.The behaviour of the adsorbed species during decomposition of isopropyl alcohol on zinc oxide was studied in more detail, leading to the overall reaction mechanism described by eqn (V).
36 citations
TL;DR: It is demonstrated that manganese is essential for acetone carboxylation and a role for manganes in nucleotide binding and activation is suggested and suggested.
36 citations
TL;DR: In this article, supercritical fluid extraction was used to produce bio-oils from algae in a cylindrical reactor (75mL) under supercritical conditions with (ferric chloride, potassium hydroxide) and without catalyst at the temperatures of 255, 275 and 295 ˚C.
Abstract: Thermochemical conversion processes such as supercritical fluid extraction are used for producing biofuels from biomass. Supercritical fluid extraction process is decomposition process of lignocellulose or other organic materials thermally under supercritical conditions at 250–400 °C temperature range under high pressure (4–5 MPa). In this study, the supercritical fluid extraction was used to produce bio-oils from algae. Supercritical fluid extraction trials were performed in a cylindrical reactor (75 mL) in organic solvents (acetone, ethanol and isopropanol) under supercritical conditions with (ferric chloride, potassium hydroxide) and without catalyst at the temperatures of 255, 275 and 295 °C. The effects of process variables including temperature and catalyst on product yields were investigated. The produced liquids at 295 °C in supercritical liquefaction were analyzed and characterized by elemental, GC–MS and FT-IR. 160, 122 and 108 different types of compounds were identified by GC–MS obtained in acetone, ethanol and isopropanol respectively. Bio-oils from supercritical liquefaction were composed of various organics including aromatics, nitrogenated and oxygenated compounds. Bio-oils obtained from supercritical liquefaction were found to have higher calorific values and superior fuel properties compared to feedstock.
36 citations
TL;DR: Interestingly, the activity of the solubilized enzyme showed a more complicated water dependence as compared to native proleather, and appeared to be the critical factor regulating the optimum activity temperature.
36 citations