Showing papers on "Methyl isobutyl ketone published in 2007"

Batch phenol removal from methyl isobutyl ketone by liquid–liquid extraction with chemical reaction

Abstract: The aim of this work was to investigate in a bench-scale mixed vessel the influence of temperature, NaOH concentration in the extracting aqueous phase and rotational speed on the batch removal of phenol from a 14.4% solution in methyl isobutyl ketone. To this purpose, temperature was varied in the range 10–40 °C, the concentration of NaOH between 5.5 and 6.5% and the rotational speed from 400 to 800 rpm. The average residual concentration of phenol in the organic phase was as less as 0.40–1.0%, corresponding to removal efficiencies of 94.0–97.6%, respectively.

One-step methyl isobutyl ketone (MIBK) synthesis from 2-propanol: Catalyst and reaction condition optimization

Abstract: A gas-phase process for methyl isobutyl ketone (MIBK) synthesis from 2-propanol in one-pot is studied as an alternative to the conventional technology for producing MIBK from acetone (DMK). Bifunctional copper/acid–base catalysts able to operate at mild temperatures and atmospheric pressure were prepared and characterized by measuring the acid and base properties as well as the metal dispersion. It was found that a Cu-Mg-Al mixed oxide catalyst gives high MIBK yields. In this catalyst, the metal fraction in loadings of 2–6 wt% promotes the hydro-dehydrogenation steps at high rates whereas the surface acid–base sites of moderate acid and base properties favor the aldol condensation reaction. The effect of different operational conditions such as reaction temperature and reactant partial pressure was also investigated. The MIBK formation rate was enhanced by increasing 2-propanol partial pressure in a wide range, consistently with a positive 2-propanol reaction order in the overall kinetics whereas the presence of hydrogen in the reactant mixture inhibited MIBK synthesis due to a negative order with respect to H 2 . An increase of the reaction temperature and the use of inert atmosphere improved the MIBK yield. By operation at 533 K in N 2 the Cu-Mg-Al catalyst with 6.4 wt% Cu, yields 27% MIBK in comparison to the 30% typically obtained in current commercial liquid-phase high-pressure processes from DMK.

Experimental Studies on the Syntheses of Mesityl Oxide and Methyl Isobutyl Ketone via Catalytic Distillation

Abstract: Two pilot-scale experiments were conducted to investigate the syntheses of mesityl oxide (MO) and methyl isobutyl ketone (MIBK) from acetone using catalytic distillation (CD) technology. Commercial catalysts were utilized to obtain process benchmarks and to gain a cursory assessment of these processes. In the first CD experiment, MO was produced from acetone using Amberlyst-15 as a catalyst. The MO production and the product distribution were found to be governed by the reflux flow rate in the CD column. A process interaction is evident whereby the magnitude of the effect of the reboiler duty on the reflux flow rate is dependent on the system pressure. Significantly, the results of the first experiment clearly show that, by using CD technology, undesirable consecutive reactions can be minimized while the production of a desired intermediate species is simultaneously increased. In this case, the MO production was increased while the production of phorone, isophorone, mesitlyene, and other higher-molecular-...

One-step synthesis of methyl isobutyl ketone from acetone over Pd/MCM-22 zeolites

Abstract: MCM-22 zeolites with different Si/Al ratios were dynamically synthesized through hydrothermal method, and the Pd/MCM-22 catalysts were prepared by ion-exchange method as well. The physicochemical properties of the samples were well characterized by XRD, SEM, TEM, N2 adsorption, NH3-TPD, and FT-IR of d3-acetonitrile adsorption. MCM-22 synthesized was markedly different from those in previous literatures, showing much smaller crystals. MCM-22 with Si/Al ratio of 25 showed the highest crystallinity and concentration of Bronsted acid sites. The loading of Pd particles had little influence on the structural and porous properties of MCM-22 zeolite. The specific surface area, pore volume, pore diameter, and the concentrations of the acid sites all decreased with increasing Pd loading as expected. One-step synthesis of methyl isobutyl ketone from acetone was investigated over Pd/MCM-22 catalysts. An acetone conversion of 34.0% and a selectivity of 86.9% for MIBK were realized. The catalytic results also suggested that a proper balance between metallic and acidic sites was necessary for obtaining high catalytic performance.

Evaluation of Liquid-Liquid Extraction Process for Separating Acrylic Acid Produced From Renewable Sugars

Abstract: In this article, the separation and the purification of the acrylic acid produced from renewable sugars were studied using the liquid-liquid extraction process. Nonrandom two-liquids and universal quasi-chemical models and the prediction method universal quasi-chemical functional activity coefficients were used for generating liquid-liquid equilibrium diagrams for systems made up of acrylic acid, water, and solvents (diisopropyl ether, isopropyl acetate, 2-ethyl hexanol, and methyl isobutyl ketone) and the results were compared with available liquid-liquid equilibrium experimental data. Aspen Plus (Aspen Technology, Inc., version 2004.1) software was used for equilibrium and process calculations. High concentration of acrylic acid was obtained in this article using diisopropyl ether as solvent.

Measurement and correlation of liquid-liquid equilibrium data for methyl isobutyl ketone-water-phenol ternary system

Abstract: Fundamental liquid-liquid equilibria data are very important in modeling and design of the extraction process.To provide fundamental data for the extraction process of phenol removal from wastewater, experimental liquid-liquid equilibrium data in the range of dilute phenol concentration were determined for the ternary system methyl isobutyl ketone (MIBK)-water-phenol at 25℃, 40℃ and 50℃ under atmospheric pressure.The experimental data were correlated with the NRTL model, and binary interaction parameters of the ternary systems were obtained.The predicted data calculated by using the regressed parameters showed that the experimental data were successfully correlated with the NRTL model.The relative root mean square deviations and absolute mean deviations between calculated and experimental values were less than 2%.

Method for producing pitavastatin calcium raw material

Abstract: The invention relates to a method for preparing the raw materials of pitavastatin calcium, which uses an (E)-7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolyl]-5-hydroxyl-3- carbonyl-6-heptene acid ester as a beginning raw material to generate a heptenoic acid through being reduced and reacted by adding an alkali and an acid; a D-(+) benzyl methylamine is added to generate a mixture of a benzyl methylamine salt, and crystallize to separate out a (3R, 5S)-dihydroxy-7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolyl]-6- heptenoic acid D-(+) benzyl methylamine through the different solubility of the mixtures in a separating agent, and the separating agent is a mixed liquid of a methyl isobutyl ketone and an acetone or an ethanol; finally adds lye to hydrolyze and prepare the pitavastatin calcium salt. The method of the invention is selectively reduced to a pair of isomers by using a determined reduction agent, generates salt by reacting with the D-(+) benzyl methylamine and effectively separates a needed isomer by utilizing the different solubility of various isomers to the separating agent. The invention has the advantages of simple preparing technique, low requirements for the raw materials and high conversion rate of the obtained products.

Preparation method of fluorin modified crylic acid resin for helicopter skining paint

Abstract: the invention discloses a fluorine modified acrylic resin and preparing method for helicopter covering paint, which comprises the following steps: blending composite monomer methacrylic acid borneol ester, n-butyl methacrylate, hydroxyethyl methacrylate, butyl acrylate, methacrylic acid and fluorine monomer in the composite solvent with xylene, propylene glycol methyl ether acetic ester, methyl isobutyl ketone and 100# solvent oil; dripping carbonic glycide ester to polymerize acted by trigger pentaphen peroxide to obtain the product.

Analysis and debottlenecking retrofits for the coal-gasification wastewater treatment process

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.

Fourier-transformed infrared breath testing after ingestion of technical alcohol.

Abstract: The study aim was to evaluate the feasibility of a Fourier-transformed infrared (FT-IR) analyzer for out-of-laboratory use by screening the exhalations of inebriated individuals, and to determine analysis quality using common breath components and solvents. Each of the 35 inebriated participants gave an acceptable sample. Because of the metabolism of 2-propanol, the subjects exhaled high concentrations of acetone in addition to ethanol. Other volatile ingredients of technical ethanol products (methyl ethyl ketone, methyl isobutyl ketone, and 2-propanol) were also detected. The lower limits of quantification for the analyzed components ranged from 1.7 to 12 microg/L in simulated breath samples. The bias was +/-2% for ethanol and -11% for methanol. Within-day and between-day coefficients of variation were <1% for ethanol and <4% for methanol. The bias of ethanol and methanol analyses due to coexisting solvents ranged from -0.8 to +2.2% and from -5.6 to +2.9%, respectively. The FT-IR method proved suitable for use outside the laboratory and fulfilled the quality criteria for analysis of solvents in breath.

InCl4- Observed in the Raman Spectra of Deuterated Acetonitrile Containing InCl3

Abstract: Indium(III) halide complexes have shown a remarkably varied crystal chemistry; structures containing indium in 4-8 coordination are known, whereas only coordination numbers of 4 and 6 have been reported for the complexes in solution. Insertion of water molecule into the coordination sheath readily occurs, resulting in six coordinate complexes. Various mixed halogeno/aqua complexes InX n (H 2 O) 6-n 3-n (X =F, Cl, Br, I) are observed in aqueous solution. More complicate InF n X m (H 2 O) 6-n-m 3-n-m (X=Cl, Br) species have also been identified in a recent F NMR study of indium fluoride complexes. Six coordinate InX n L 6-n 3-n species can also be formed in nonaquous media for L = dimethylformamide, dimethylsulfoxide, or tributyl phosphate and X = Cl or Br, whereas only four coordinate tetrahedral InI 4 − anion is observed in the indium iodide aqueous solution with additional HI, mainly due to the large size of the iodine atom. It is also reported in In NMR studies that four coordinate indium halide anions (InX 4 −) are obtained in extraction with solvents such as acetone, methyl isobutyl ketone, ethyl ether, isopropyl ether, n-butyl acetate, cyclohexanone, and ethyl acetoacetate from HCl, HBr, and HI solutions. Tuck et al. substantiated in an In NMR study formation of In 2 Cl 6 2

Effect of acidic and metallic sites on the catalytic performance of Pd/ZSM-5 catalysts in the one-step synthesis of mibk

Abstract: The acidic properties of Pd/ZSM-5 catalysts were characterized by NH3-TPD and FT-IR of d3-acetonitrile adsorption. Effect of Pd loading on the catalytic activity and product distribution was studied in the one-step synthesis of methyl isobutyl ketone from acetone. The results indicated that a proper balance between acidic and metallic sites was necessary to obtain high catalytic performance.

Recovery of actinides from their dioxides using organic reagents saturated with nitric acid

Abstract: The TBP-HNO3 and N,N′-dimethyl-N,N′-dioctylhexylethoxymalonamide-HNO3 adducts effectively recovery actinides from solid solutions of their oxides in UO2 matrix. The adduct of methyl isobutyl ketone and HNO3 selectively recovers uranium from PuO2-UO2 solid solution, separating uranium from plutonium. The optimal composition of TBP-HNO3 adducts for the recovery of actinides from the dioxide solid solutions was determined. Uranium is recovered with the adduct more rapidly at lower temperatures and smaller volume of the organic phase, as compared to the dissolution of the oxide fuel in aqueous nitric acid. This approach to the processing of spent nuclear fuel can substantially decrease the volume of highly toxic radioactive aqueous and organic wastes arising with the existing technologies.

Method for separating methyl isobutyl ketone synthetic fluid

Abstract: The invention provides a method for separating methyl isobutyl ketone synthesis solution based on an isopropanol one-step process. The method includes an acetone tower, a dehydrating tower, a methyl isobutyl ketone (MIBK) recovery tower and a methyl isobutyl ketone refining tower. A liquid-liquid separator is arranged at the tower bottom of the acetone tower, acetone is collected at the tower top, and a part of water in the synthesis solution material is removed in a tower bottom side. Water in the material and upper light components thereof are removed at the tower top in the dehydrating tower. A liquid-liquid separator is arranged near the feeding port of the MIBK recovery tower, and isopropanol and water in the tower top material of the dehydrating tower are removed at the tower top and the siding by washing the siding water of the acetone tower and by adopting the heterogeneous azeotropic rectification. The bottom material of the dehydrating tower and the bottom material of the MIBK recovery tower are refined in the methyl isobutyl ketone refining tower, and the qualified product can be obtained at the tower top. By adopting the method, the MIBK recovery reaches above 95%, and the mass purity of the MIBK reaches above 99.5%.

Process of preparing atomic energy level zirconium dioxide and hafnium oxide by methyl isobutanone double solvent extraction method

Abstract: The methyl isobutyl ketone (MIBK) double solvent extraction process of prepare zirconia and hafnium oxide in atomic energy level includes the following steps: 1 preparing dilute hydrochloric acid solution, dilute sulfuric acid solution, ammonia solution, zirconium oxychloride solution and ammonium thiocyanate solution; setting in high-level tanks separately; washing and reverse extracting; 2 mixing MIBK and extractant and extracting; 3 mixing ammonium thiocyanate solution, zirconium oxychloride solution and dilute hydrochloric acid solution; and setting the mixture in high-level tank; 4 reaction through stirring for 8 hr and multistage extraction to obtain zirconium hydroxide solution and hafnium hydroxide solution; 5 depositing zirconium hydroxide and hafnium hydroxide in ammonia water; and 6 high temperature roasting zirconium hydroxide and hafnium hydroxide to obtain zirconia and hafnium oxide The process has high separating effect and less environmental pollution

Organic solid fluorescent substance

Abstract: PROBLEM TO BE SOLVED: To provide an organic solid fluorescent substance which is very bright in a solid state. SOLUTION: N,N,N',N'-tetrakis(2-methylbenzyl)-2,5-diamino-3,6-pyrazine carbonitrile, whose maximum reflectance in a visible light region in a solid by the reflectometry of a posterior spectroscopy method is less than 100%, is dissolved with heat in chloroform or methyl isobutyl ketone, and is recrystallized by cooling to obtain the crystal of N,N,N',N'-tetrakis(2-methylbenzyl)-2,5-diamino-3,6-pyrazine carbonitrile having a very bright high luminance. In the crystal, the maximum reflectance in a visible light region in a solid by a reflected degree spectroscopy method is 100% or more, preferably 120% or more, and further preferably 150% or more. COPYRIGHT: (C)2007,JPO&INPIT

Preparation method of high purity electronic stage tetraphenolic ethane tetraglycidel ether epoxy resin

Abstract: This invention relates to preparation method of a high-pure electronic grade four phenolic group methylmethane, four ethyl oxide ester araldite, includes ring cleavage addition and etherealization, ring closure epoxy dechlorinate and ethoxyline resin refine. It takes four phenolic group methylmethane and epichlorohydrin as raw material, add solvent, under protection of inert gas, at the presence of phase transfer catalyst phase transfer catalyst quaternary ammonium salt or quaternary alkylphosphonium salt or their mixture, occur ring cleavage addition and etherealization, generate chlorine hydroxyl ether intermediate; then by stage add aqueous alkali, carry out first time ring closure epoxy dechlorinate reaction, control the reaction temperature at 60 to 80 deg.C; abstract solvent and over dose epichlorohydrin, then add aqueous alkali and methyl isobutyl ketone methyl isobutyl ketone solvent to carry out second time ring closure epoxy dechlorination, control reaction temperature at 70 to 110 deg.C, gain 1, 1, 2, 2 - four ( hydroxybenzene group) ethane four ethyl oxide ester araldite crude product; Refine crude product to obtain final product.

Production,Consumption and Prospects of Methyl Isobutyl Ketone at Home and Abroad

Abstract: The paper reviewed production, consumption, import export as well as competitiveness of main producers of methyl isobutyl ketone at home and abroad . The demand for MIBK is 2010 is forecasted.

Method for photooxidative decomposition of volatile organic compound contained in gas phase

Abstract: PROBLEM TO BE SOLVED: To provide a method for reducing concentration of a volatile organic compound, which is often present in the atmosphere in extremely small concentration and usually has unpleasant odor, by photooxidative decomposition. SOLUTION: The volatile organic compound in the gas phase is adsorbed onto amorphous silica and then is irradiated with UV rays to carry out photooxidative decomposition of the volatile organic compound into a decomposition product containing acetic acid and/or carbon dioxide. Examples of the volatile organic compound include an aromatic hydrocarbon such as toluene and xylene, an aliphatic aldehyde such as acetaldehyde and nonanal, an aliphatic carboxylic acid such as valeric acid, an aliphatic carboxylic acid alkyl ester such as ethyl acetate and an aliphatic ketone such as methyl isobutyl ketone. COPYRIGHT: (C)2008,JPO&INPIT

Study on the liquid complex of boron isotopes separation by chemical exchange reaction and distillation

Abstract: Using anisole,nitromethane,acetone,methyl isobutyl ketone as the donors,four complex compounds were prepared.The basic properties of four complex compounds were experimentally researched respectively,which provided the important data for the production of boron isotopes in the pilot and industrialized scale.These(preliminary) studies indicate that the boron fluoride with nitromethane or acetone system with higher separation factor is superior to the anisole system used currently,but a more detailed study is needed for a realistic economic(comparison) of the two processes.

Method for manufacturing retardation film

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a retardation film which exhibits inverse wavelength dispersion characteristic and which has excellent formability and productivity. SOLUTION: The method for manufacturing a retardation film comprises a process for obtaining a polymer film by dissolving a resin composition containing a polyvinyl acetal resin as an essential component into a solvent comprising at least one selected from toluene, ethyl acetate, methyl isobutyl ketone, methyl ethyl ketone, cyclopentanone and cyclohexanone, casting the prepared solution into the surface of the substrate to be a sheet shape, and vaporizing the solvent and a process for stretching the polymer film. COPYRIGHT: (C)2007,JPO&INPIT