Methylethylketone, MEK

In another case an unlabeled drum smelled like methylethylketone (MEK), so it was assumed to be MEK and was fed to the plant. Actually, it contained ethanol and a bit of MEK. Fortunately, the only result was a ruined batch. 

The almost quantitative oxidation/complexation of palladium(O) in powder or foils by Me2dazdt 2I2 in THF, acetone, acetonitrile, and methylethylketone (MEK) to afford [Pd(Me2dazdt)2](I3)2 makes this synthetic route appealing for practical industrial applications. A selective process for Pd-recovery from model three-way car converters was simulated obtaining a Pd-extraction yield > 90%, and was proposed as an alternative to hydrometallurgical processes.62... 

Carbonylation of IBPE and other 2-arylethanols with various organosoluble Pd-catalysts was studied in detail with special emphasis on the role of the promoters p-toluenesulfonic acid and LiCl [55], Some of the catalytic species, such as [PdCl(PPh3)2] formed from [Pd(PPh3)4] or from Pd(II) precursors in aqueous methylethylketone (MEK) under reaction conditions (54 bar CO, 105 °C) were identified by P NMR spectroscopy. Ibuprofen was obtained in a fast reaction (TOP = 850 h" ) with 96% yield (3-IPPA 3.9 %), while the carbonylation of l-(6-methoxynaphtyl)ethanol gave 2-(6-methoxynaphtyl)propionic acid (Naproxen) with high selectivity (97.2 %) but with moderate reaction rates (TOP = 215 h" ). 

More synthetic interest is generated by the potentially very useful hydration of dienes. As shown on Scheme 9.6, methylethylketone (MEK) can be produced from the relatively cheap and easily available 1,3-butadiene with combined catalysis by an acid and a transition metal catalyst. Ruthenium complexes of several N-N chelating Hgands (mostly of the phenanthroline and bipyridine type) were found active for this transformation in the presence of Bronsted acids with weakly coordinating anions, typically p-toluenesulfonic acid, TsOH [18,19]. In favourable cases 90 % yield of MEK, based on butadiene, could be obtained. 

The conclusion of the unsupervised PCA analysis was that there was enough selectivity to distinguish between compounds based on functional groups. However, it was unclear whether the se array could distinguish between compounds with the same chemical functionaltty. SIMCA models for 2 of the 10 compounds, triethylamine (TEA) and methylethylketone (MEK), are constructed and validated against the entire data set containing all 10 classes of compounds. 

Likely, components of the odors such as acetone, methylethylketone (MEK), and methylvinylketone (MVK), have also been tested separa-... 

Both methylethylketone (MEK) andmethylisopropylketone (MIPK) form minimum-boihng azeotropes with water (Fig. 13-58b). In this ternary system, a separatrix connects the binary azeotropes and divides the RCM into two regions. The high-boiHng node of Region I is pure water, while the low-boiHng node is the MEK-water azeotrope. 

The kinetic rate constant of the OH oxidation of NMP was determined using the relative kinetic method. The principle of this method is to measure the decay rate of the OH-induced oxidation of the reactant (NMP) relative to that of a reference compound (R) for which the OH oxidation rate constant is well known (reactions 2 and 3). In this study, two reference compounds were chosen methylethylketone (MEK) and methyl-iso-butylketone (MIBK) ... 

Stationary phase Solvent Gelman ITLC-SG (fiberglass), 2x9.5 cm Acetone (resp. methylethylketone [MEK])... 

Percentage swell in water, methylethylketone (MEK) and xylene was determined for square specimens (25 x 25 mm) after 2 weeks of immersion at room temperature and calculated from the following equation ... 

Absorption and emission spectra of 20 trans-4,4 -disubstituted stilbenes have been measured in four solvents cyclohexane (CH), chlorobenzene (CB), 2-butanone (methylethylketone, MEK), anddimethylsulfoxide (DMSO) at room temperature [24]. Fluorescence quantum yields (4>f) and fluorescence lifetimes (Xf) have been measured for these stilbenes. Substituent effects on the Stokes shift were described by a spectroscopic Hammett equation... 

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