Topic
Methyl isobutyl ketone
About: Methyl isobutyl ketone is a research topic. Over the lifetime, 2071 publications have been published within this topic receiving 26976 citations. The topic is also known as: Hexone & Isobutyl methyl ketone.
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TL;DR: In this article, a study on solvent extraction in multipass microporous hollow-fiber modules has been carried out both theoretically and experimentally, and it was found that mass transfer of solvent extraction was analogous to heat transfer in shell-and-tube heat exchangers.
40 citations
TL;DR: All of the solvents gave a negative response in the bacterial mutation assays and the yeast mitotic gene conversion assay and in cultured mammalian cells (either rat liver or Chinese hamster ovary) for structural chromosome damage.
Abstract: Two hydrocarbon solvents (heptane and Special Boiling Point Spirit 100/140) and eight oxygenated solvents [methyl ethyl ketone, methyl isobutyl ketone, diacetone alcohol, di-isobutyl ketone, isopropyl ether, hexylene glycol, secondary butyl alcohol and ME 6K (pentoxone)] have been tested for genotoxic activity. The solvents were tested in bacterial mutation assays, a yeast assay for mitotic gene conversion and in cultured mammalian cells (either rat liver or Chinese hamster ovary) for structural chromosome damage. All of the solvents gave a negative response in the bacterial mutation assays and the yeast mitotic gene conversion assay. In the rat liver chromosome assay, diacetone alcohol evoked a weak positive response, the remaining solvents gave a negative response.
40 citations
TL;DR: In this paper, the effects of Li 2 O and ZrO 2 -doping on the surface and catalytic properties of the CuO/MgO system were investigated.
Abstract: The effects of Li 2 O and ZrO 2 -doping on the surface and catalytic properties of CuO/MgO system have been investigated. The dopant concentration was changed between 0.6 and 3.6 mol% Li 2 O and that of ZrO 2 between 2.4–7.7 mol%. Pure and variously doped solids were calcined at 673 and 773 K. The techniques employed for characterization of different solids were XRD, nitrogen adsorption at 77 K and catalytic conversion of iso -propanol at different reaction temperatures ranged between 423 and 573 K. The results revealed that the addition increasing amounts of dopant (Li 2 O and ZrO 2 ) to CuO/MgO solid led to an increase in the degree of dispersion of CuO phase and a decrease in the specific surface areas of the investigated solids. Li 2 O and ZrO 2 -doping increases the catalytic conversion of iso -propanol, which proceeds mainly via dehydrogenation to give acetone and aldol condensation of the produced acetone to give methyl isobutyl ketone (MIBK). Doping with 1.2 mol% Li 2 O for the solids calcined at 673 K increases both of total conversion and selectivity to MIBK at reaction temperature 473 K with 24% and 25%, respectively. Doping with 7.7 mol% ZrO 2 for the investigated solids calcined at 673 K increases both of total conversion and selectivity to MIBK at reaction temperature 473 K with 32% and 99%, respectively.
40 citations
TL;DR: In this paper, an activity-based kinetic model is proposed to predict the observed results, with the non-idealities of the liquid phase being described using the UNIQUAC method.
Abstract: The kinetics of one-step synthesis of methyl isobutyl ketone from acetone was studied in the presence of the bifunctional commercial ion exchange resin, Amberlyst CH28 over a wide range of temperature, total pressure and catalyst loading in a batch reactor. An activity-based kinetic model is proposed to predict the observed results, with the non-idealities of the liquid phase being described using the UNIQUAC method. Formation of mesityl oxide was found to govern the overall rate of reaction. Low reaction rates were observed at higher conversion, possibly due to a pseudo-equilibrium caused by reversible deactivation of the catalyst as a result of formation of water in the reaction system. Simultaneous removal of water during the course of the reaction may result in an enhanced conversion.
40 citations
TL;DR: Amberlite LA-2 (a secondary amine mixture) has been studied for its ability to extract acrylic acid at different amine concentrations as mentioned in this paper, and the maximum removal of acrylic acid is 98.22 % with MIBK at 298.15 K.
Abstract: Amberlite LA-2 (a secondary amine mixture) has been studied for its ability to extract acrylic acid at different amine concentrations. The extraction of acrylic acid by Amberlite LA-2 dissolved in seven single solvents (cyclohexane, 2-octanone, toluene, methyl isobutyl ketone (MIBK), iso-octane, hexane, and 1-octanol) has been investigated with respect to different amine concentrations at 298.15 K. In the extraction, two acid−amine complexes, (HO):(R2N) and (HO):(R2N)2, have been assumed to exist in the organic phase in the case of proton-donating diluents, while the complexes (HO):(R2N) and (HO)2:(R2N)3 have been suggested in the case of nonproton-donating diluents. Important data for the design and analysis of different separation processes have been obtained as a result of batch experiments. These important data are distribution coefficients (D), loading factors (Z), extraction efficiency (E), and overall extraction constants (K11, K12, K23). The maximum removal of acrylic acid is 98.22 % with MIBK at ...
39 citations