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, Li et al. showed that there exists an obvious synergic effect between CS2 and acetone during the extraction and between toluene and methanol during the thermal dissolution.
Abstract: Baiyinhua lignite (BL) was sequentially extracted and thermally dissolved in isometric CS2/acetone and toluene/methanol binary solvents to obtain an extract in isometric CS2/acetone (EICA) and a soluble portion (SP) in isometric toluene/methanol (SPITM). The yields of EICA and SPITM are notably higher than the total extract yield from sequential extraction with CS2 and acetone (or acetone and CS2) and the total SP yield from sequential thermal dissolution in toluene and methanol (or methanol and toluene), indicating that there exists an obvious synergic effect between CS2 and acetone during the extraction and between toluene and methanol during the thermal dissolution. EICA and SPITM mainly consist of hydrocarbons and oxygen-containing organic species, respectively. Little difference in Fourier transform infrared spectroscopy spectra of BL and its extraction residue was observed, while the intensities of absorbances assigned to the phenolic OH, C═O, and C–O/C–O–C groups of the thermal dissolution residue ...
39 citations
TL;DR: The first bacterial ketone formation from gaseous alkanes was demonstrated with methane-grown Pseudomonas methanica as discussed by the authors, which was able to oxidize but not assimilate propane and butane, in the presence of the growth substrate (methane).
Abstract: Publisher Summary Epoxides are extremely valuable products because of their ability to undergo a variety of chemical reactions. The products of epoxidation are industrially important because of their ability to polymerize under thermal, ionic, and free radical catalysis to form epoxy homopolymers and copolymers. Ethylene oxide and propylene oxide constitute the two important commercial epoxides. Past studies of epoxide formation showed that the rate of propylene oxide production was linear for the first 120 minutes for strains CRL M1 and OB3b, and for the first 60 minutes for strain CRL 26. In the epoxidation of propylene by cell suspensions of methane-utilizing bacteria, no formation of 3-hydroxy-l-propene was detected. The first bacterial ketone formation from gaseous alkanes was demonstrated with methane-grown Pseudomonas methanica. This strain was able to oxidize but not assimilate propane and butane, in the presence of the growth substrate (methane). Products of this cooxidation of propane were n -propanol, propionic acid, and acetone.
39 citations
TL;DR: In this article, three cellulose derivatives; ethyl cellulose, cellulose acetate and carboxymethyl cellulose were subjected to electrohydrodynamic processing with safe, environmentally friendly solvents; ethanol, acetone and water.
Abstract: Cellulose derivatives are an attractive sustainable material used frequently in biomaterials, however their solubility in safe, green solvents is not widely exploited. In this work three cellulose derivatives; ethyl cellulose, cellulose acetate and carboxymethyl cellulose were subjected to electrohydrodynamic processing. All were processed with safe, environmentally friendly solvents; ethanol, acetone and water. Ethyl cellulose was electrospun and an interesting transitional region was identified. The morphological changes from particles with tails to thick fibres were charted from 17 to 25 wt% solutions. The concentration and solvent composition of cellulose acetate (CA) solutions were then changed; increasing the concentration also increased fibre size. At 10 wt% CA, with acetone only, fibres with heavy beading were produced. In an attempt to incorporate water in the binary solvent system to reduce the acetone content, 80:20 acetone/water solvent system was used. It was noted that for the same concentration of CA (10 wt%), the beading was reduced. Finally, carboxymethyl cellulose was electrospun with poly(ethylene oxide), with the molecular weight and polymer compositions changed and the morphology observed.
39 citations
39 citations
TL;DR: In this article, the authors investigated the influence of temperature and pressure in the supercritical regimes of water, catalyst, and aqueous products in relation to the yield and composition of the gases and products.
Abstract: Gasification of glucose in near- and supercritical water was investigated at temperature and pressure ranges from 400 to 600 °C and 20 to 42.5 MPa with a reaction time of 1 h. Hydrothermal gasification of glucose was performed in the absence and presence of catalyst (K 2 CO 3 ) in a batch reactor. The influences of temperature and pressure in the supercritical regimes of water, catalyst were examined in relation to the yield and composition of the gases and aqueous products. The product gases were analyzed by gas chromatography, and the aqueous products were analyzed by high performance liquid chromatography. The gases produced were carbon dioxide, methane, hydrogen, carbon monoxide, and C 2 –C 4 hydrocarbons and there was significant production of aqueous products and residue. The aqueous products composed of oxygenated compounds, including carboxylic acids (glycolic acid, formic acid, acetic acid), furfurals (furfural, 5-hydroxymethyl furfural, 5-methyl furfural), phenols (phenol, methyl phenols, hydroxy phenols, methoxy phenols), aldehydes (formaldehyde, acetaldehyde, acetone, propionaldehyde), ketones (3-methyl-2-cyclo-pentene-1-one, 2-cyclo-pentene-1-one) and their alkylated derivatives. Carbon gasification efficiencies were improved by addition of K 2 CO 3 into the reacting system. Carbon gasification efficiency reached maximum (94%) at 600 °C and 20 MPa. The yield of hydrogen among gaseous products increased with increasing temperature and decreasing pressure.
39 citations