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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01 Jan 2007
TL;DR: In this paper, the feasibility of several renovations for the two main problems, i.e.,low phenols removal performance of extraction and crystal deposition induced by the crystallization of CO2 and NH3, were discussed.
Abstract: The bottleneck of the coal gasification wastewater treatment process was analyzed based on simulation by using Aspen Plus.The feasibility of several renovations for the two main problems,i.e.,low phenols removal performance of extraction and crystal deposition induced by the crystallization of CO2 and NH3,were discussed.The results show that it is not economical to reduce the residual concentration of CO2 by increasing the stripper stages or lowering pH of wastewater,since the residual CO2 mainly exists as ions in gasification wastewater.However,the residual concentration of CO2 can be effectively reduced by increasing the operating pressure of the stripper.It also indicates that using diisopropyl ether as solvent,the residual concentration of phenols can not be reduced to less than 400 mg/L by increasing solvent flowrate and extractor stages or lowering pH of wastewater.Based on experimental results,methyl isobutyl ketone(MIBK) can be selected as extraction solvent to meet the requirement,and the performances of phenols removal and COD removal are greatly improved for the coal-gasification wastewater treatment.
9 citations
TL;DR: In this article, a bifunctional catalyst TiO2/Al2O3 and Pd/Cor was used for one-pot liquid-phase synthesis of MIBK from acetone.
Abstract: We reported a bifunctional catalyst TiO2/Al2O3 and Pd/Cor for one-pot liquid-phase synthesis of MIBK from acetone in this paper. The characterizations of FT-IR, Raman spectra, TEM, XPS, CO2-TPD, NH3-TPD, Py-IR and TGA spectra revealed that the TiO2/Al2O3 could possess more acid sites and especially Lewis acid sites due to the coexistence of TiO2 and Al2O3. So a higher acetone conversion 35–45% at 150 °C and 2.0 MPa pressure was achieved than ever reported for MIBK liquid-phase synthesis. In addition, the catalyst could keep active for at least 90 h on stream at 80–90% MIBK selectivity. The phenomenon of carbonaceous accumulation on TiO2/Al2O leaded to the deactivation of catalyst. Because of the coexistence of TiO2 and Al2O3. TiO2/Al2O3 could have more acid sites and especially Lewis acid sites. For liquid-phase synthesis of methyl isobutyl ketone, bifunctional catalyst TiO2/Al2O3&Pd/Cor showed higher acetone conversion.
9 citations
Patent•
11 Jul 2013
TL;DR: A method for producing bisphenol A is described in this paper, which comprises: (1) a step wherein phenol and acetone are subjected to a condensation reaction using a reactor that is filled with a strongly acidic cation exchange resin catalyst that is partially modified with a sulfur-containing amine compound, and (2) a low-boiling-point component is separated from the reaction mixture liquid, thereby preparing a crystallization starting material containing concentrated bisphensol A.
Abstract: A method for producing bisphenol A, which comprises: (1) a step wherein phenol and acetone are subjected to a condensation reaction using a reactor that is filled with a strongly acidic cation exchange resin catalyst that is partially modified with a sulfur-containing amine compound, thereby producing bisphenol A and obtaining a reaction mixture liquid containing bisphenol A; (2) a step wherein a low-boiling-point component is separated from the reaction mixture liquid, thereby preparing a crystallization starting material containing concentrated bisphenol A; (3) a step wherein the crystallization starting material is cooled so that an addition product of bisphenol A and phenol is crystallized, thereby producing a crystallized product of the addition product of bisphenol A and phenol, and the crystallized product is separated from the reaction mixture liquid; and (4) a step wherein phenol is removed from the crystallized product and bisphenol A is collected. This method for producing bisphenol A also comprises: (R1) a step wherein water and phenol are separated from waste water, which contains phenol and is generated during the bisphenol A production process, using methyl isobutyl ketone, thereby extracting crude phenol; and (R2) a step wherein the crude phenol is purified by distillation, thereby obtaining phenol that has a sulfur concentration of 0.5 ppm by mass or less and a nitrogen concentration of 0.1 ppm by mass or less. The phenol obtained in the step (R2) is reused in at least one step among the steps (1)-(4).
9 citations
TL;DR: In this paper, the impact energy loss spectra of acetone, 2-butanone, methyl isobutyl ketone and methyl isopropyl-ketone have been recorded at an impact energy of 100 eV and a scattering angle of two degrees.
9 citations
TL;DR: In this paper, the authors measured the density and viscosity properties of pure chloroform and methyl isobutyl ketone at T = (283.15, 293.15 and 313.15) K. The experimental results were fitted to empirical equations, which permit the calculation of these properties over the whole concentration and temperature ranges studied.
9 citations