Showing papers on "Methyl isobutyl ketone published in 2017"
TL;DR: Dimethyl carbonate (DMC) is an established solvent and a green reagent which continues to attract attention as discussed by the authors, it is a nonpolar aprotic solvent with good miscibility with water, biodegrades readily in the atmosphere, and is non-toxic.
Abstract: Dimethyl carbonate (DMC) is an established solvent and a green reagent which continues to attract attention. It is a nonpolar aprotic solvent with good miscibility with water, biodegrades readily in the atmosphere, and is non-toxic. DMC is classified in the greenest “recommended” bracket according to the solvent selection guide, and can be a potential replacement for methyl ethyl ketone, ethyl acetate, methyl isobutyl ketone, and most other ketones. Currently, the most prevalent commercial pathway for the production of DMC is through oxidative carbonylation of methanol using O2; in addition, new alternative processes for DMC from CO2 are being developed. DMC has found several applications such as the electrolyte in lithium rechargeable batteries and as a solvent in several reactions including pharmaceutically relevant synthesis and in biocatalysis. This report provides a brief overview of physical-thermodynamic-, toxicological- and ecotoxicological properties, production methods, reactivity, and applications of DMC as an environmentally benign chemical in chemical- and biotechnical processes.
111 citations
TL;DR: Li + ions were extracted using tributyl phosphate (TBP) in methyl isobutyl ketone (MIBK) as the extractant and FeCl 3 as the coextractant.
80 citations
TL;DR: In this article, mesityl oxide, as a novel extractant, is found with high phenols removal efficiency through quantum chemical calculations, and the removal performance with three different solvents (diisopropyl ether (DIPE), methyl isobutyl ketone (MIBK), and m obesityl oxide) are investigated and compared via multi-stage counter-current extraction experiments.
39 citations
TL;DR: In this paper, the effect of different parameters, such as reaction temperature, reaction time, catalyst loading and volume ratio of water with methyl isobutyl ketone (MIBK) was studied using heteropolyacids, immobilized in silica, as catalyst.
37 citations
TL;DR: In this article, the reactive extraction of levulinic acid (4-oxopentanoic acid) was investigated by using Aliquat 336 in various organic solvents [benzene, dichloromethane, dodecane, methyl isobutyl ketone (MIBK), 1-octanol] from dilute aqueous solution.
Abstract: In the present study, the reactive extraction of levulinic acid (4-oxopentanoic acid) was investigated by using Aliquat 336 in various organic solvents [benzene, dichloromethane (DCM), dodecane, methyl isobutyl ketone (MIBK), 1-octanol] from dilute aqueous solution. Equilibrium data obtained at 298 K and 101.325 kPa were used to determine the values of distribution coefficient (KD), degree of extraction (E%), loading factor (Z), and complexation constants (KE). Among the diluents tested, DCM gave the highest extraction efficiency. Using 0.5454 mol·kg–1 of Aliquat 336 in DCM, KD and E% were obtained as 2.082 and 67.55%, respectively, at 0.2795 mol·kg–1 initial acid concentration in the aqueous solution. Z values were found to be between 0.033 and 1.628 depending on the nature of the diluent used and Aliquat 336 concentration in the organic phase. Using mass action law modeling, the stoichiometry of the extraction reaction was determined. It was observed that mostly 1:1, 2:1, and 3:1 types of complexes were...
35 citations
TL;DR: In this paper, a solvent-free NaOH catalyzed aldol condensation of biomass-derived 5-hydroxymethyl furfural (HMF) and Furfural with methyl isobutyl ketone (MIBK) was studied, producing branched C11 and C12 furan compounds in high yields of up to 96%.
Abstract: Solvent-free NaOH catalyzed aldol condensation of biomass-derived 5-hydroxymethyl furfural (HMF) and furfural with methyl isobutyl ketone (MIBK) was studied, producing branched C11 and C12 furan compounds in high yields of up to 96%. Through use of a Pd/C and Eu(OTf)3 catalytic system, the condensation products of the bio-based starting materials were further hydrodeoxygenated (HDO) in one-step to biofuel compatible branched alkanes 2-methylundecane (3) and 2-methyldecane (4) in excellent yields of 90% and 98%, respectively. In the one-step HDO developed herein, the variation of solvent had a significant effect on the reaction route and degree of conversion of furans to alkanes in the HDO process. Very high overall yields of alkanes 3 (86%) and 4 (94%) were obtained starting from the biomass-based HMF and furfural.
26 citations
TL;DR: The developed method was applied for the analysis of commercial samples of soybean lecithin, finding the best conditions were found to be 213.561nm with a pyrolysis temperature of 1300°C, a volatilization temperature of 2300°C and Mg as a chemical modifier.
22 citations
TL;DR: In this paper, a ternary mixture of butanol, butyl acetate, and methyl isobutyl ketone (MIBK) was initially analyzed by the residual curve.
20 citations
TL;DR: The results indicated that the continuous dosing and impact of MIBK had limited effect on phenols removal in the UASB reactor, but the specific methanogenic activity (SMA) values of sludge decreased by 45-75% after M IBK exposure.
18 citations
TL;DR: In this article, an operationally simple and versatile method encompassing in a one-pot process both the dehydration of several carbohydrate substrates into HMF and subsequently its direct conversion into various high value-added furan derivatives was described.
Abstract: 5-Hydroxymethylfurfural (HMF) constitutes one of the pivotal chemicals to utilize biomass as chemical feedstock. For this approach the vast majority of methods require accessing to pure HMF from biomass before its utilization, thus incorporating one or more purification steps that obstruct industrial implementation. This work describes an operationally simple and versatile method encompassing in a one-pot process both the dehydration of several carbohydrate substrates into HMF and subsequently its direct conversion into various high value-added furan derivatives. To that end, we selected the aldol condensation of HMF with methyl isobutyl ketone (MIBK) as a model reaction. With the optimized conditions of solvent and base catalyst in hand, the one-pot dehydration of fructose and condensation sequence with various ketones afforded the products in good overall yields over two steps. The scope of the process was successfully expanded to more complex carbohydrates, such as glucose, lactose, sucrose, cellobiose and inulin. Moreover, by fine-tuning the reaction conditions, the one-pot methodology using inulin as substrate was found to be highly efficient when applied to various other important reaction types, such as oxidation, reduction, Cannizzaro and Baylis-Hillman reactions, rendering the corresponding furan derivatives in high overall yields.
18 citations
TL;DR: Two integrated processes for the direct synthesis of dodecanol or 2,4,8-trimethylnonane (a jet fuel range C12 -branched alkane) using methyl isobutyl ketone (MIBK) that can be derived from lignocellulose are demonstrated.
Abstract: For the first time, we demonstrated two integrated processes for the direct synthesis of dodecanol or 2,4,8-trimethylnonane (a jet fuel range C12 -branched alkane) using methyl isobutyl ketone (MIBK) that can be derived from lignocellulose. The reactions were carried out in dual-bed continuous flow reactors. In the first bed, MIBK was selectively converted to a mixture of C12 alcohol and ketone. Over the Pd-modified magnesium- aluminium hydrotalcite (Pd-MgAl-HT) catalyst, a high total carbon yield (73.0 %) of C12 oxygenates can be achieved under mild conditions. In the second bed, the C12 oxygenates generated in the first bed were hydrogenated to dodecanol over a Ru/C catalyst or hydrodeoxygenated to 2,4,8-trimethylnonane over a Cu/SiO2 catalyst. The as-obtained dodecanol can be used as feedstock in the production of sodium dodecylsulfate (SDS) and sodium dodecyl benzene sulfonate (SDBS), which are widely used as surfactants or detergents. The asobtained 2,4,8-trimethylnonane can be blended into conventional jet fuel without hydroisomerization.
TL;DR: In this paper, a stepwise isopropylation reaction of acetone is developed for preparation of methyl isobutyl ketone (MIBK) through acetone condensation and a recoverable Pt/C-catalyzed transfer hydrogenation of mesityl oxide (MO) with iso-propane (IPA).
TL;DR: The experimental data were correlated by thermodynamic nonrandom two-liquid and universal quasichemical models, and the binary interaction parameter values were obtained from the data correlation as mentioned in this paper.
Abstract: Liquid–liquid equilibrium (LLE) data for the water + N,N-dimethylacetamide + solvents (chloroform, methyl isobutyl carbinol, methyl isobutyl ketone, isopropyl acetate, or isopropyl ether) ternary systems were determined at 308.2 and 298.2 K and at 101.3 kPa. Distribution coefficients and separation factors were calculated to evaluate the effectiveness of extracting N,N-dimethylacetamide from aqueous solution. The Othmer–Tobias equation and the Hand equation were used to confirm the reliability of the experimental LLE data. The experimental data were correlated by thermodynamic nonrandom two-liquid and universal quasichemical models, and the binary interaction parameter values were obtained from the data correlation.
TL;DR: The main product obtained in the industrial cultivation of green microalgae Dunaliella salina is natural β-carotene (5-Carotene).
Abstract: The main product obtained in the industrial cultivation of green microalgae Dunaliella salina is natural β-carotene. After the extraction of the valuable pigment an algae residue remains. This remnant was hydrolyzed under mild liquefaction conditions at 453 K for 1 h in various ethanol/water ratios. A heterogeneous acidic catalyst, Nafion NR50, was used in one experiment for comparison. The main compounds comprising the soluble fraction were identified. Methyl isobutyl ketone (MIBK) was used as extraction solvent to obtain 5-hydroxymethylfurfural (5-HMF) as a product. The 5-HMF solubility in the ternary ethanol/water/MIBK mixtures along the binodal curve was predicted by the quantum chemical method COSMO-RS. The partition of the 5-HMF in the MIBK rich extract and the aqueous phase was estimated based on the prediction. Theoretically, 96.2% of 5-HMF can be recovered in the MIBK rich extract in liquefaction conditions with an ethanol/water ratio of 50/50 (v/v). Experimentally, 10.3 mg of 5-HMF per gram of t...
TL;DR: In this article, the extraction equilibrium behavior of Pb(II) by noncommercial ionic liquid having extraction properties (3-[1-(hydroxyimine)undecyl]-1-propylpyridinium chloride) dissolved in MIBK was investigated.
TL;DR: In this paper, experimental liquid equilibrium data for ternary systems (methyl isobutyl ketone, catechol, water, resorcinol and water) were determined at 333.15, 343.15 and 353.15 K under atmospheric pressure.
TL;DR: In this article, the authors report the new experimental values of densities, speeds of sound, and refractive indices for four binary mixtures: {methyl isobutyl ketone (MIBK)+dimethyl sulfoxide (DMSO) or acetone or acetonitrile, or cyclohexane} over the entire composition range and in the temperatures range (293.15-313.15) K at 10 K intervals and pressure p ǫ = 0.1 MPa.
TL;DR: In this paper, the authors used a static analytic method to analyze the solubility of their own synthesis of esomeprazole sodium in ethyl acetate, acetonitrile, methyl isobutyl ketone, ethanol, methanol, and in the (ethanol + ethylacetate) mixtures between 278.15 and 328.15 K.
Abstract: Esomeprazole sodium was a proton pump inhibitor (PPI) synthesized using omeprazole sulfide. In this paper, we used a static-analytic method to analyze the solubility of our own synthesis of esomeprazole sodium in ethyl acetate, acetonitrile, methyl isobutyl ketone, ethanol, methanol, and in the (ethanol + ethyl acetate) mixtures between 278.15 and 328.15 K. A group of thermodynamic models were selected such as the Jouyban–Acree equation, the modified Apelblat equation, and CNIBS/R-K equations. All equations can be well applied and the modified Apelblat equations are relatively better. We determined the thermodynamic properties of esomeprazole sodium using the van’t Hoff equation furthermore, including the entropy, Gibbs energy, and enthalpy.
Patent•
17 May 2017
TL;DR: In this paper, a method for preparing cyclopentanol by hydrating cyclopsene and acetic acid is presented. But the method is not suitable for the high energy consumption and high selectivity, high product yield and the like.
Abstract: The invention discloses a method for preparing cyclopentanol by hydrating cyclopentene. The method comprises the following steps: (1) performing addition reaction on cyclopentene and acetic acid under the action of modified sulfonic acid group cation exchange resin to produce cyclopentyl acetate, wherein the modified sulfonic acid group cation exchange resin is prepared by soaking the conventional sulfonic acid group cation exchange resin with methylbenzene and methyl isobutyl ketone sequentially; (2) enabling the material obtained in the step (1) to enter a rectifying tower, forming azeotrope with water on the lower part of the rectifying tower, performing hydrolysis reaction on the material and water under the action of a sulfonic acid group cation exchange resin catalyst filling the upper part of the rectifying tower, withdrawing a product cyclopentanol from the top of the tower and withdrawing acetic acid from the bottom of the tower. The method has the advantages of simple technical process, low energy consumption, high conversion rate, high selectivity, high product yield and the like.
TL;DR: In this paper, the solubility of two erlotinib hydrochloride polymorphs (form A and form B) in methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, and methyl isobutyl kone from 273.15 to 323.15 K were determined by means of high-performance liquid chromatography (HPLC).
Abstract: The solubility of two erlotinib hydrochloride polymorphs (form A and form B) in methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, and methyl isobutyl ketone from 273.15 to 323.15 K were determined by means of high-performance liquid chromatography (HPLC). The modified Apelblat equation and the Buchowski–Ksiazczak λh equation were used to correlate the experimental solubility data. The results showed that the solubility of both forms generally increased with the temperature and at a given temperature decreased with the increase of the carbon number of alcohols; furthermore, methyl isobutyl ketone showed the largest solubility in the studied ketones. Meanwhile form A had a higher solubility than form B which demonstrated that form A was the metastable form. Furthermore, both models mentioned above gave satisfactory correlation results, in which the modified Apelblat equation worked better than the Buchowski–Ksiazczak λh equation.
TL;DR: In this article, the methyl isobutyl ketone + o-cresol + water ternary system has been experimentally measured from 298.2 to 323.2 K below 101kPa.
Abstract: Liquid–liquid equilibrium (LLE) data for the methyl isobutyl ketone + o-cresol + water ternary system have been experimentally measured from 298.2 to 323.2 K below 101 kPa. The measured LLE data were verified to be highly consistent through the Othmer–Tobias and Hand equations. The extraction efficiency of methyl isobutyl ketone for o-cresol was assessed by the distribution coefficient and separation factor. The experimental results correlated well with two excess Gibbs energy models: non-random two-liquid and universal quasi chemical, which also yielded binary interaction parameter.
TL;DR: In this article, the solubility of 2-mercaptobenzothiazole with cyclohexylamine (2-MBT-CHA) and tert-butylamine with cyclosmosphate (TBA) in solid-liquid equilibrium, in various alternative solvents, is studied.
TL;DR: In this article, MIBK and acetophenone (Methyl Phenyl Ketone) were used for removal of Fe(III) from concentrated hydrochloric acid solutions, and the best condition was found to be 30 min − 400 r.p.m.
Abstract: In this study Methyl Isobutyl Ketone (MIBK) and acetophenone (Methyl Phenyl Ketone) are presented as suitable agents for removal of Fe(III) from concentrated hydrochloric acid solutions. An extensive study applying 4 parameters was carried out: Time (5, 10,15,20,30 and 60 minutes), Stirring rate (200, 300, 400 and 500 r.p.m), Solvent to HCl Ratio (5%, 10%, 14% and 16%), and initial concentration of Fe ions in crude HCl (95.24, 126 ppm, 330 ppm and 1955 ppm).The best Condition was found to be 30 min – 400 r.p.m – 14 %. The distilled water was used to strip Fe ions out of MIBK; In order to get most of the MIBK dissolved in both the concentrated HCl and water. Diluents were used such as benzene, kerosene and xylene. Xylene gives better recovery of about 96%.
Patent•
26 Apr 2017
TL;DR: A self-cleaning antifouling organic-inorganic super-amphiphobic polymer coating which is prepared from the following raw materials: perfluoroalkyl ethanol, methyl isobutyl ketone, HDI trimer, methyl methacrylate, styrene, hydroxyethyl methacriclate, perfluorooctyl methacyl, benzoyl peroxide, 25-28 parts of methanol silica sol, propylene glycol methyl ether acetate, titanium dioxide, sodium hexametaphosphate, vinyl tri
Abstract: The invention discloses a self-cleaning antifouling organic-inorganic super-amphiphobic polymer coating which is prepared from the following raw materials: perfluoroalkyl ethanol, methyl isobutyl ketone, HDI trimer, methyl methacrylate, styrene, hydroxyethyl methacrylate, perfluorooctyl methacrylate, benzoyl peroxide, 25-28 parts of methanol silica sol, propylene glycol methyl ether acetate, titanium dioxide, sodium hexametaphosphate, ethyl orthosilicate, vinyl triethoxysilane, an appropriate amount of ammonia water, an appropriate amount of silane coupling agent KH570, an appropriate amount of methyl hydroxyl silicone oil, an appropriate amount of 10% dibutyltin dilaurate, a dispersant, a leveling agent, a defoamer, an appropriate amount of butyl acetate, an appropriate amount of anhydrous ethanol, and an appropriate amount of deionized water The super-amphiphobic polymer coating provided by the invention is simple and feasible in preparation method, can be firmly combined with a variety of substrates, and has universality, good self-cleaning performance, dirt resistance, scrub resistance, corrosion resistance and other performance, and good application prospects
TL;DR: In this paper, isobaric vapor-liquid equilibrium (VLE) data at 100 kPa have been obtained for the two ternary systems formed by the two hydrocarbons and one of the selected solvents.
Abstract: Diethyl carbonate and methyl isobutyl ketone are tested as possible entrainers for separating 1-hexene and n-hexane by extractive distillation. For this purpose, isobaric vapor–liquid equilibrium (VLE) data at 100 kPa have been obtained for the two ternary systems formed by the two hydrocarbons and one of the selected solvents: 1-hexene + n-hexane + diethyl carbonate and 1-hexene + n-hexane + methyl isobutyl ketone. VLE data for the following constituent binary systems have also been determined: 1-hexene + diethyl carbonate, n-hexane + diethyl carbonate, 1-hexene + methyl isobutyl ketone, and finally n-hexane + methyl isobutyl ketone. All binary systems present moderate positive deviations from Raoult’s law, and neither binary systems nor ternary systems show an azeotrope. The local composition models Wilson, UNIQUAC, and NRTL have been used for correlating VLE data and evaluating solvent effects.
TL;DR: Different solvents including cyclohexane, dichloromethane, chloroform, toluene, 1-octanol, and methyl isobutyl ketone (MIBK) have been evaluated in extracting copper(II) from nitrate medium by salicylideneaniline as mentioned in this paper.
Abstract: Different solvents including cyclohexane, dichloromethane, chloroform, toluene, 1-octanol, and methyl isobutyl ketone (MIBK) have been evaluated in extracting copper(II) from nitrate medium by salicylideneaniline. Extracted species differs from solvent to solvent: CuL2 in cyclohexane, toluene, 1-octanol, and methyl isobutyl ketone. However, in dichloromethane or chloroform, there are two complexes of the type CuL2 and CuL2(HL). The extraction constants and percentage of extraction (%E) are calculated for different solvents. Solvent played an important role in recovering copper(II) from the aqueous solution, thus affecting the extraction equilibrium and extraction efficiency. The nonpolar solvent showed better performance than the polar solvent. The maximum extraction efficiency was 85.75% at pH = 4.5, which was from cyclohexane.
TL;DR: The experimental VLE data for all the measured binary systems were correlated with the Wilson and NRTL activity coefficient models using the gamma-phi approach (γ-Φ) with the Hayden and O'Connell correlation employed for calculating the second virial coefficients that are used in accounting for nonidealities in the vapor phase.
Abstract: Isothermal vapor–liquid equilibrium (VLE) data for 1-propanol + methyl isobutyl ketone at 338.15, 353.15, and 368.15 K and 2-propanol + methyl isobutyl ketone were measured at 323.15, 338.15, and 353.15 K. All the measurements were undertaken on a recirculating VLE glass still operated at isothermal conditions. The experimental VLE data for all the measured binary systems were correlated with the Wilson and NRTL activity coefficient models using the gamma–phi approach (γ–Φ) with the Hayden and O’Connell correlation employed for calculating the second virial coefficients that are used in accounting for nonidealities in the vapor phase. The models provided satisfactory correlation of the measured alcohol–ketone-binary mixtures at all the temperatures reported. The thermodynamic consistency of the data was checked using the point test method of Van Ness et al. (Van Ness, H. C., Byer, S. M., and Gibbs, R. E. AIChE J. 1973, 19, 238−244) as well as the more rigorous direct test of Van Ness (Van Ness, H. C. Pure...
TL;DR: In this article, the removal of glycolic acid from aqueous solutions by using reactive extraction with different organic solvents and tripropylamine mixtures was investigated, and the most important parameters for the design of reactive extraction processes were calculated: Distribution coefficient (D), loading factor (Z), and the percentage of extraction efficiency (E%).
Abstract: In this study, the removal of glycolic acid from aqueous solutions by using reactive extraction with different organic solvents and tripropylamine mixtures was investigated. In experimental studies, methyl isobutyl ketone (MIBK), 1-decanol, toluene, cyclohexyl acetate (CHA), DMP and an ionic liquid, namely 1-butyl-3-methylimidazolium hexafluorophosphate (IL), were chosen as the diluent solvent in the organic phase. In recent chemistry researches, IL compounds have come to the foreground due to their superior properties and environmentally friendly chemical structures and they are being used intensively. For this reason, it is particularly aimed to compare the efficiency of the IL compound with other solvents. In addition to the solvent effect, the amine concentration used was changed to determine the effect on extraction yield. Using the obtained data, the most important parameters for the design of reactive extraction processes were calculated: Distribution coefficient (D), loading factor (Z), and the percentage of extraction efficiency (E%). The maximum removal of glycolic acid has been achieved as 99.76 % with IL and 1.75 mol L -1 initial amine concentration.
TL;DR: In this article, the synergistic solvent extraction of Nickel(II) from sulfate medium with N-(2-hydroxybenzylidene)aniline in the absence and presence of Methyl-Isobutyl Ketone (MIBK) in chloroform at 25°C, has been studied.
Abstract: The synergistic solvent extraction of Nickel(II) from sulfate medium with N-(2-hydroxybenzylidene)aniline in the absence and presence of Methyl-Isobutyl Ketone (MIBK) in chloroform at 25°C, has been studied. Synergistic effect is observed for the metal at low and high (MIBK) concentration ratios, respectively. The synergistic extraction of nickel (II) with the mixtures has been investigated with the analysis methods of slope. The extractable species has been identified as NiL2 and NiL2(MIBK)2. The extraction constants are reported.