Showing papers on "Methyl isobutyl ketone published in 2016"
TL;DR: In this article, three different acid ZSM-5 zeolites have been prepared and tested in the catalytic dehydration of glucose into 5-hydroxymethylfurfural (HMF).
155 citations
TL;DR: In this article, a series of heteropolyacid catalysts (HOCH2CH2N(CH3)3) xH3−xPW12O40 (abbreviated as ChxH3 −xPw12O 40, x = 1, 2 and 3) were synthesized using choline chloride and H3PW 12O40 as the raw materials, which were used as heterogeneous catalysts in one-pot conversion of cellulose to 5- hydroxymethylfurfural (ABB) in double solvent system
Abstract: A series of heteropolyacid catalysts (HOCH2CH2N(CH3)3) xH3−xPW12O40 (abbreviated as ChxH3−xPW12O40, x = 1, 2 and 3) had been synthesized using choline chloride and H3PW12O40 as the raw materials, which were used as heterogeneous catalysts in one-pot conversion of cellulose to 5- hydroxymethylfurfural (abbreviated as HMF) in double solvent system containing methyl isobutyl ketone (abbreviated as MIBK) and H2O. A remarkable HMF yield of 75.0% was achieved catalyzed by ChH2PW12O40 within 8 h at 140 °C attributed to its higher Bronsted acidity and thermoregulate property comparable to its homogeneous form H3PW12O40. To the best of our knowledge, it was almost the highest yield of HMF from cellulose by now, while the best yield of 64.0% was reported so far over AlCl3 in biphasic system. Using our biphasic reaction protocol, even raw lignocellulosic biomass straw, gave HMF yields of 27.6%. Moreover, such heteropolyacid catalysts could be recycled under simply lowering the reaction temperature to room temperature without loss of its weight, which were reused for more than 10 times.
119 citations
TL;DR: In this paper, Li + extraction was performed using tributyl phosphate in methyl isobutyl ketone as the extractant and FeCl 3 as the coextractant.
108 citations
TL;DR: In this paper, a biphasic system consisting of water, tetrahydrofuran (THF), methyl isobutyl ketone (MIBK), and high-pressure CO2 at elevated temperatures with MIBK as the water immiscible extracting solvent was proposed.
91 citations
TL;DR: In this paper, a new series of heteropolyacids (HPAs) was synthesized by a precipitation/ion exchange method using choline chloride and H5AlW12O40 as precursors.
82 citations
TL;DR: It could be concluded that the different salting-out/salting-in behavior of the various salts is mainly caused by their different tendency to form ion pairs in aqueous solutions.
Abstract: This study investigates the influence of electrolytes on the performance of extracting 5-hydroxymethylfurfural (HMF) from aqueous media using methyl isobutyl ketone (MIBK). For that purpose, liquid–liquid phase equilibria (LLE) of quaternary systems containing HMF, water, MIBK and salts were measured at atmospheric pressure and 298.15 K. The salts under investigation were composed of one of the anions NO3–, SO42–, Cl–, or CH3COO– and of one of the alkali cations Li+, Na+, or K+. On the basis of these LLE data, the partition coefficient of HMF between the aqueous and the MIBK phase KHMF was determined. It could be shown that KHMF significantly depends on the kind and concentration of the added salt. Weak electrolytes (e.g., sulfates, acetates) caused salting-out, whereas nitrates caused salting-in of HMF to the aqueous phase. Unexpectedly, LiCl caused salting-out at low LiCl concentrations and salting-in at LiCl concentrations higher than 3 mol/kgH2O. The model electrolyte perturbed-chain SAFT (ePC-SAFT) w...
52 citations
TL;DR: The performance of the SA-SBSE method using dichloromethane, diisopropyl ether, and cyclohexane is illustrated with analyses of aroma compounds in beer and of pesticides in wine.
49 citations
TL;DR: In this paper, a hybrid purification process combining extraction and distillation for the production of levulinic acid (LA), furfural, and formic acid from lignocellulosic biomass was studied.
Abstract: A hybrid purification process combining extraction and distillation for the production of levulinic acid (LA), furfural, and formic acid (FA) from lignocellulosic biomass was studied. The effective process depends on the choice of appropriate extraction solvent. A comprehensive procedure of solvent selection for the LA production process was developed. A range of solvents were first evaluated by solvent screening, and processes using the three most promising solvents, including methyl isobutyl ketone (MIBK); furfural and octanol were then designed and optimized using an Aspen Plus simulator. These processes were evaluated in terms of the energy consumption, total annual cost, and environmental impact. As a result, MIBK showed the most favorable equilibrium for the extraction of LA but was unfavorable for FA extraction. Octanol showed not only the most favorable result in the extraction of FA, but was also favorable for the extraction of furfural and LA. Interestingly, furfural could extract more LA than o...
45 citations
TL;DR: A novel flow injection-fabric disk sorptive extraction (FI-FDSE) system was developed for automated determination of trace metals and the potentials of this technique were demonstrated for trace lead and cadmium determination in environmental water samples.
39 citations
33 citations
TL;DR: In this paper, a biphasic system consisting of methyl isobutyl ketone and H2O was achieved for a highly integrated one-pot catalytic transformation and delignification process of lignocellulosic biomass.
Abstract: A biphasic system, consisting of methyl isobutyl ketone and H2O, has been achieved for a highly integrated one-pot catalytic transformation and delignification process of lignocellulosic biomass. Using SO3H-functionalized ionic liquids as catalysts, 85.8% of bagasse can be fractionated into 71.4% water-soluble chemicals at 76.3% lignin extraction ratio, under the optimized conditions. The practicability of this biphasic system for other typical biomass sources has also been tested with high efficiency, viz., 79.6 to 91.9% lignin extraction ratio of corncob, corn stalk, rice husk, and rice straw with 56.6 to 72.8% water-soluble chemicals yield at 64.8 to 81.3% feed conversion.
TL;DR: In this paper, the liquid-liquid equilibrium (LLE) data for ternary systems, methyl isobutyl ketone+o, m or p-cresol+water were measured at 333.15, K, 343.15 and 353.15 k under 101.3 kPa.
01 May 2016
TL;DR: In this paper, 2,5-hexanedione was synthesized from biomass derived dimethyl furane using a highly efficient biphasic system, where mineral acids (HCl, H2SO4 and H3PO4) dissolved in aqueous phase were used as hydrolysis catalysts.
Abstract: 2,5-hexanedione, a valuable platform chemical which is being broadly used in biofuel, medicinal chemistry and drug discovery, was synthesized from biomass derived dimethyl furane using a highly efficient biphasic system. In this biphasic systems, mineral acids (HCl, H2SO4 and H3PO4) dissolved in aqueous phase were used as hydrolysis catalysts. The hydrolysis reaction is suggested to take place at the interface between the aqueous and the organic phase. But more importantly, water-immiscible organic phase could continuously extract the in-situ produced 2,5-hexanedione from the interface to prevent the extended contact between the 2,5-hexanedione and the acids, thereby avoiding the oligomerization side reactions A yield of 99 % could be obtained when methyl isobutyl ketone (MIBK) was the organic phase in the biphasic system.
TL;DR: In this article, two improved methods for the synthesis of 5-hydroxymethylfurfural by acid-catalyzed dehydration of fructose have been developed, one in ionic liquids with continuous removal of water under reduced pressure, and the second in two-phase system consisting of aqueous NaHSO4 and methyl isobutyl ketone under atmospheric pressure.
Abstract: Two improved methods for the synthesis of 5-hydroxymethylfurfural by acid-catalyzed dehydration of fructose have been developed. The first one is the synthesis in ionic liquids with continuous removal of water under reduced pressure, and the second is the synthesis in the two-phase system consisting of aqueous NaHSO4 and methyl isobutyl ketone under atmospheric pressure. Both methods ensure isolation of crystalline 5-hydroxymethylfurfural with high purity and multiple recycling of the catalytic system. The synthesis in ionic liquid is convenient on a laboratory scale. Despite relatively low yield, the two-phase synthesis is preferred for industrial scale-up due to simple isolation and purification procedures combined with efficient regeneration of extractant and the catalytic system.
TL;DR: In this article, the effects of dilution of the etching waste acid, N235 and MIBK concentrations, organic/aqueous (O/A) phase ratio, extraction temperature, and contact time were systematically studied.
TL;DR: In this article, 3.5-hydroxymethyl furfural (HMF) was prepared via fructose dehydration in aqueous and organic media, using three methods, i.e., conventional heating, ultrasonication and microwave irradiation.
Abstract: 5-Hydroxymethyl furfural (HMF) is known as a noteworthy platform in a biorefinery concept. HMF was prepared via fructose dehydration in aqueous and organic media, using three methods, i.e., conventional heating, ultrasonication and microwave irradiation. Water, methyl isobutyl ketone (MIBK), methyl ethyl ketone and ethyl acetate were used as media for HCl-catalyzed synthesis of HMF. FTIR and 1H-NMR spectroscopies were used for analysis. The synthesis yield and selectivity were investigated to optimize variables such as fructose concentration, catalyst dosage, temperature, irradiation power, solvent, and the reaction atmosphere. It was found that the yield in the organic media was superior to that of the aqueous ones. In addition, nitrogen atmosphere favored higher yield than air, due to lack of HMF oxidation. As conclusion, the highest yields of the conventional, ultrasonicated and microwave-assisted reactions were 87, 53, and 38%, respectively. In the reactions ultrasonically promoted, the reaction time scale was highly reduced from hours to minutes. The yield was varied with treatment times, so that ultrasonication was recognized to be the best approach in terms of yield, while the microwave method was the fastest one. Selectivity varied from 60 to 90% depending the reaction media and promotion method.
TL;DR: In this article, the distribution coefficients and separation factors were calculated to evaluate the extracting performance of methyl isopropyl ketone, which was proven to be a very efficient solvent to extract phenol from aqueous solution.
Abstract: Liquid–liquid equilibria (LLE) data for the ternary system, methyl isopropyl ketone (MIPK) + phenol + water, were measured at 298.15 K, 313.15 and 323.15 K under atmospheric pressure by gas chromatography. Distribution coefficients and separation factors were calculated to evaluate the extracting performance of methyl isopropyl ketone, which was proven to be a very efficient solvent to extract phenol from aqueous solution, with distribution coefficients for phenol even higher than those of methyl isobutyl ketone (MIBK) or methyl butyl ketone (MBK). The nonrandom two-liquid (NRTL) and universal quasi-chemical activity coefficient (UNIQUAC) models were used to correlate the experimental data to yield binary interaction parameters for phenol extraction process design or optimization.
TL;DR: In this paper, two solvents, 4-methyl-2-pentanone (methyl isobutyl ketone, MIBK) and 2-methyl 2-butanol (tert-pentanol, TAA), were tested and compared according to their performance in furfural extraction from aqueous solutions.
Abstract: Two solvents, 4-methyl-2-pentanone (methyl isobutyl ketone, MIBK) and 2-methyl-2-butanol (tert-pentanol, TAA), were tested and compared according to their performance in furfural extraction from aqueous solutions. Two new experimental apparatus were built and novel liquid–liquid equilibrium of ternary systems consisting of solvent, furfural, and water were measured between 298 and 401 K having boiling point pressure up to 4 bar. In addition, liquid–liquid equilibrium of binary systems were measured between 298 and 352 K at atmospheric pressure. Measurements were modeled with UNIQUAC activity coefficient model and its binary interaction parameters were presented together with the measured data. The suitability of solvent for industrial use was discussed with selectivity and distribution factors.
TL;DR: The reliability of the experimental tie-line data was confirmed by the Hand and Othmer-Tobias equations as mentioned in this paper, and the NRTL and UNIQUAC models were used to correlate the experimental data and relevant binary interaction parameters were obtained.
Abstract: Liquid–liquid equilibria (LLE) data for the ternary methyl isobutyl ketone + phenol + water system have been determined at temperatures of (33315, 34315 and 35315) K under atmospheric pressure The reliability of the experimental tie-line data was confirmed by the Hand and Othmer–Tobias equations The NRTL and UNIQUAC models were used to correlate the experimental data, and relevant binary interaction parameters were obtained The experimental equilibrium compositions were successfully correlated by both models, with root-mean-square deviations <25 %, while the NRTL yielded even better correlation results According to the distribution coefficients and selectivities, methyl isobutyl ketone is an excellent extractant to recover phenol from wastewater even in the temperature range of 33315–35315 K, which offers considerable advantages over extraction at lower temperatures
TL;DR: In this paper, the effects of an alkali-acid purification process on the properties of eucalyptus lignin isolated from a methyl isobutyl ketone (MIBK)/methanol/water-based organosolv fractionation process were evaluated.
Abstract: In this study, the effects of an alkali-acid purification process on the properties of eucalyptus lignin isolated from a methyl isobutyl ketone (MIBK)/methanol/water-based organosolv fractionation process were evaluated. The results showed that the treatment reduced the content of carbohydrates, ash, nitrogen and sulfur, and improved lignin solubility (up to 218%) in five organic solvents (acetone, methanol, ethanol, tetrahydrofuran and dimethyl sulfoxide) and removed lignin fractions with smaller molecular weights. However, analysis by Py-GC/MS, solid state NMR and 2D-HSQC NMR indicated that the alkali-acid treatment process did not cause changes to the monomeric lignin subunits and linkages of the lignin polymer. The treated lignin showed slightly higher thermal stability at temperatures <250 °C, though its maximum rate of decomposition occurred at 325 °C, 26 °C lower than that of the untreated lignin. On the basis of these results, the significant improvement in solvent solubility of the lignin by the treatment process will widen lignin application.
TL;DR: In this article, tie-line and solubility data for the systems containing formic acid (FA), water, and methyl isobutyl ketone (MIBK) + NaCl were determined experimentally at temperature 298.15 K and atmospheric pressure.
Abstract: The tie-line and solubility data for the systems containing formic acid (FA), water, and methyl isobutyl ketone (MIBK) + NaCl were determined experimentally at temperature 298.15 K and atmospheric pressure. The effect of salt 0.05–0.15 mass fraction (base on mass of initial water) was investigated. Binary interaction parameters were ascertained by comparing the experimental tie-line data with the nonrandom two-liquid model (NRTL) correlations. The tie-line data of the systems were analyzed using the Othmer–Tobias, Hand, and Bachman correlation equations. Separation factors and distribution coefficients were assessed. The results show that enlargement of the two–-hase region occurred when the concentration of salt increased in the initial aqueous phase; adding salt to the system proved beneficial in separating FA from water.
TL;DR: In this paper, multi-walled carbon nanotubes (MWCNTs)/polypropylene (PP) blend membranes were synthesized by phase inversion process, using xylene as a solvent and methyl isobutyl ketone (MIBK) as a dispersion medium for MWCNTs.
Abstract: Multi-walled carbon nanotubes (MWCNTs)/polypropylene (PP) blend membranes were synthesized by phase inversion process, using xylene as a solvent and methyl isobutyl ketone (MIBK) as a dispersion medium for MWCNTs. The prepared MWCNTs/PP membranes were characterized using several analytical techniques such as: attenuated total reflections Fourier transform infrared spectroscopy, contact angle measurement, atomic force microscope (AFM), and scanning electron microscope (SEM). Performance of the synthesized membranes in vacuum-enhanced direct contact membrane distillation (VEDCMD) process was evaluated using 55°C feed synthetic water and/or oil field produced water samples with salinities up to 230,000 ppm. Effect of membrane preparation conditions, including polymer concentration, polymer thickness, and CNT concentrations as well as operating temperatures and streams flow rates on the flux were studied. The results showed an improvement in membranes characteristics and trans-membrane flux by MWCNTs ...
TL;DR: In this article, a facile and eco-friendly system for synthesis of 5-hydroxymethylfurfural (HMF) from glucose has been investigated with the catalyst dihydric phosphate (H2PO4) in a methyl isobutyl ketone (MIBK)/H2O biphasic system.
Abstract: A facile and eco-friendly system for synthesis of 5-hydroxymethylfurfural (HMF) from glucose has been investigated with the catalyst dihydric phosphate (H2PO4—) in a methyl isobutyl ketone (MIBK)/H2O biphasic system. The results showed that the catalyst dosage, reaction temperature, and reaction time had noticeable effects on glucose conversion and the HMF yield; more than 50% yield of HMF was achieved at the optimum conditions. In addition, this catalytic system was broadly substrate-tolerant; a satisfactory HMF yield was obtained from higher substrate concentrations and complex substrates. Furthermore, this efficient catalyst was recycled up to nine consecutive times without the loss of catalytic activity.
TL;DR: The dissolution of 2,4-dinitrophenylhydrazine in an acidic solution, such as trifluoroacetic acid, was essential for its function as a reactive matrix for MALDI-MS.
Abstract: The sensitivity, range of applications, and reaction mechanism of 2-hydrazinoquinoline as a reactive matrix for matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) were examined. Using a reaction chamber (125L) equipped with a stirring fan and a window for moving the MALDI-MS plate and volatile samples in and out, the sensitivities of 2-hydrazinoquinoline to gaseous aldehydes (formaldehyde, acetaldehyde, propionaldehyde, and n-butyraldehyde) and ketones (acetone, methyl ethyl ketone, and methyl isobutyl ketone) were determined to be at least parts per million (ppm) levels. On the other hand, carboxylic acids (formic acid, acetic acid, propionic acid, and butyric acid) and esters (ethyl acetate, pentyl acetate, isoamyl acetate, and methyl salicylate) could not be detected by 2-hydrazinoquinoline in MALDI-MS. In addition to 2,4-dinitrophenylhydrazine, a common derivatization reagent for analyzing carbonyl compounds quantitatively in gas chromatography and liquid chromatography, the dissolution of 2-hydrazinoquinoline in an acidic solution, such as trifluoroacetic acid, was essential for its function as a reactive matrix for MALDI- MS.
TL;DR: In this paper, a biphasic system with 1-butyl-3-methylimidazolium chloride (BMIM) and methyl isobutyl ketone (MIBK) was proposed to create a bubbling effect to increase the interface area and enhance the turbulence of the mixture.
Abstract: Separation of a compound from an ionic liquid through extraction usually results in a low mass transfer rate because of the high viscosity of the ionic liquid and the large density difference between the ionic liquid and organics even under strong stirring An improved interface mass transfer during extraction or biphasic reaction was realized by creating a bubbling effect in a biphasic system containing an ionic liquid In a model biphasic system containing 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) as the solvent phase and methyl isobutyl ketone (MIBK) as the extraction phase, the bubbling reagents partitioned in the [BMIM]Cl phase, such as methanol, ethanol and acetonitrile, exhibit dynamic equilibrium between the two phases through constant gasification from and dissolution into the [BMIM]Cl phase Bubbling increases the interface area and dynamically enhances the turbulence of the mixture; both phenomena are beneficial for fast transfer of 5-hydroxymethylfurfural from the ionic liquid phase to the extraction phase The organic solvents suitable as bubbling reagents were identified, and the key parameters in establishing bubbling biphasic systems were determined
Patent•
30 Mar 2016
TL;DR: In this article, a one-step method of preparing methyl isobutyl ketone from acetone was proposed, which mainly overcomes problems in the prior art, namely high catalyst production costs, easy palladium loss and poor stability.
Abstract: The invention relates to a one-step method of preparing methyl isobutyl ketone from acetone, and mainly overcomes problems in the prior art, namely high catalyst production costs, easy palladium loss and poor stability. According to a technical scheme adopted by the method, the method adopts the acetone and hydrogen as raw materials, and synthesizes the methyl isobutyl ketone by bringing the raw materials into contact with a catalyst at 100-250 DEG C under 0.5-4.0 MPa, with the mole ratio of the hydrogen to the acetone being 0.1-2, and the weight hourly space velocity of the acetone being 1-10 h ; and the catalyst includes a) 0.1-1% by weight of a metal active component, b) 40-90% by weight of silicone micropore zeolite, and c) 10-60% by weight of an adhesive. The problems are overcome by adoption of the technical scheme. The method can be used for industrial production of the methyl isobutyl ketone.
Patent•
20 Jan 2016
TL;DR: In this paper, a method for performing efficient treatment on phenolic wastewater through a mixed extraction agent is presented, which comprises the steps that methyl isobutyl ketone and auxiliary extraction solvent are prepared into the mixed extraction agents.
Abstract: The invention belongs to the technical field of sewage treatment, and discloses a method for performing efficient treatment on phenolic wastewater through a mixed extraction agent. The method comprises the steps that methyl isobutyl ketone and auxiliary extraction solvent are prepared into the mixed extraction agent, and any one or more than two of propyl alcohol, n-butyl alcohol, isobutyl alcohol, propyl acetate and tert-butyl methyl ketone is/are adopted as the auxiliary extraction solvent; the phenolic wastewater is extracted with the mixed extraction agent at the temperature of 25 DEG C-80 DEG C to obtain an extraction phase and a raffinate phase. According to the method, compared with the single methyl isobutyl ketone, the mixed extraction agent is lower in boiling point, higher in recovery rate and more economical in energy in the recovery stage; in addition, in an azeotropic composite of the mixed extraction agent and water, the water amount is less, the water tower energy consumption is reduced, and the good industrial application prospect is achieved.
Patent•
16 Nov 2016
TL;DR: The black temperature change paint is made from a mixture of temperature color change pigment, polyurethane resins, cyclohexanone, xylene, 12+/-05% of butyl ester and methyl isobutyl ketone as discussed by the authors.
Abstract: The invention discloses black temperature change paint The black temperature change paint is prepared from resin, a pigment, a solvent and an auxiliary The resin is prepared from, by weight, 24+/-1% of polyurethane resin, 10+/-2% of thermoplastic acrylic resin and 5+/-2% of fully-etherified amino resin The pigment is prepared from, by weight, 25+/-5% of temperature color change pigment The solvent is prepared from, by weight, 5+/-05% of cyclohexanone, 8+/-05% of xylene, 12+/-05% of butyl ester and 9+/-05% of methyl isobutyl ketone (MIBK) The auxiliary is prepared from, by weight, 1+/-02% of fluorine modified flatting agent, 2+/-03% of silicone defoamer and 1+/-03% of inter polymer alkyl ammonium salt dispersant
TL;DR: In this article, the extraction of water-soluble phenols from the total phenol water of the Kiviter and Petroter shale-chemical processes with the following extractants was studied: butyl acetate, methyl isobutyl ketone, and a mixture of butyl and methyl isoacetate.
Abstract: The extraction of water-soluble phenols from the total phenol water of the Kiviter and Petroter shale-chemical processes with the following extractants was studied: butyl acetate, methyl isobutyl ketone, and a mixture of butyl acetate and isobutyl acetate.
TL;DR: P Pt-Al-TUD-1 as mentioned in this paper, which contains acidic and metallic active sites incorporated in a three dimensional mesoporous siliceous tud-1 material, was prepared by one-pot synthesis procedure.