Acetone from 2-propanol

To eluate an antibiotic from chromatographic columns as a mobile phase such solvents as methanol, ethanol, propanol, acetone, acetonitrile are usually used. Influence of these solvents on ions Eu(III) in a complex with OxTC and Cit has been investigated. It is established, that the used solvents do not reduce I Eu(III) ions, and sometimes they increase I by 16-45 %. 

Zuppa et al.60 have used SOMs in the assessment of data from an electronic nose. Six chemicals—water, propanol, acetone, acetonitrile, butanol, and methanol—were presented at varying concentrations to a 32-element conducting polymer gas sensor array. The output was used to train a group of SOMs, rather than a single SOM, to avoid the problems of parameter drift. One SOM was associated with each vapor, and with suitable use of smoothing filters, the SOM array was found to perform effectively. 

FIGURE 3 2 Solvent extraction efficiencies (EF) as functions of dielectric constants (D), solubility parameters (6), and polarity parameters (P and E -). Solvents studied silicon tetrachloride, carbon disulfide, n pentane. Freon 113, cyclopentane, n-hexane, carbon tetradiloride, diethylether, cyclohexane, isooctane, benzene (reference, EF 100), toluene, trichloroethylene, diethylamine, chloroform, triethylamine, methylene, chloride, tetra-hydrofuran, l,4 dioxane, pyridine, 2 propanol, acetone, ethanol, methanol, dimethyl sulfoxide, and water. Reprinted with permission from Grosjean. ... 

Kennedy and Stock reported the first use of Oxone for many common oxidation reactions such as formation of benzoic acid from toluene and of benzaldehyde, of ben-zophenone from diphenyhnethane, of frawi-cyclohexanediol Ifom cyclohexene, of acetone from 2-propanol, of hydroquinone from phenol, of e-caprolactone from cyclohexanone, of pyrocatechol from salicylaldehyde, of p-dinitrosobenzene from p-phenylenediamine, of phenylacetic acid from 2-phenethylamine, of dodecylsulfonic acid from dodecyl mercaptan, of diphenyl sulfone from diphenyl sulfide, of triphenylphosphine oxide from triphenylphosphine, of iodoxy benzene from iodobenzene, of benzyl chloride from toluene using NaCl and Oxone and bromination of 2-octene using KBr and Oxone . Thus, they... 

Fig. 19. ATR signals as a function of time for 2-propanol oxidation at 298 K catalyzed by 5% Pd/ TiO2 immobilized on a ZnSe IRE. At time t = 20 s, the solvent flow was switched from hydrogen-saturated 2-propanol to oxygen-saturated 2-propanol. At t = 120 s, the flow was switched again to hydrogen-saturated 2-propanol. Signals associated with the oxidation product of 2-propanol, acetone, and water are shown. The signal at 1820 cm is associated with changes occurring on the metal catalyst (see text for details) (49. ...

Ethanol is formed by the anaerobic metabolism of yeasts like Saccharomyces and many other species. In the presence of sulfite salts or in alkaline solutions, the alcohol formation can be changed to glycerin formation. Clostridium and Bacillus species participate in the production of butanol-acetone-butyric acid. Besides n-butanol, acetone and butyric acid, other organic compounds like propionic and lactic acids, 2-propanol, ethanol, and acetyl methylcarbinol (3-oxo-2-butanol) as well as C02 and H2 are produced as by-products. Some bacteria generate 2-propanol from acetone and others form acetone from ethanol. 

It was claimed by Henty(Ref 2) that O. de Battice prepd nittoacetone in 1895 in Belgium by oxidation of nitroisopropanol with chromic mixture. Henry described the compd as a col, mobile liq with a sharp odor, d 1.070 at 14°, bp 152° at 767 mm and insol in w. Lucas claimed(Ref 3) that the compd described by Henry was not nittoacetone, but this statement was disputed by Henry(Ref 4)> Harries also claimed(Ref 5) diat the compd described by Henry is not nittoacetone More recently, Hass Hudgin(Ref 7) claimed that they had isolated some nitro-acetone from the high-boiling fraction of the vapor-phase nitration of acetone but it is not clear from their paper whether die substance was liq or solid. Hurd Nilson(Ref 8) ptopd nittoacetone as pale-green ctysts, mp 47°, by oxidizing 1-nitro—2—propanol with sodium dichromate and sulfuric acid. The yield was 66% of theoretical. The explosibility of this compd was not mentioned... 

The butanols and their methyl and ethyl ethers have several advantages as oxygenates over methanol and ethanol in gasoline blends. Their energy contents are closer to those of gasoline the compatibility and miscibility problems with petroleum fuels are nil excessive vapor pressure and volatility problems do not occur and they are water tolerant and can be transported in gasoline blends by pipeline without danger of phase separation due to moisture absorption. Fermentation processes (Weizmann process) have been developed for simultaneous production of 1-butanol, 2-propanol, acetone, and ethanol from... 

Incinerator exhaust gases do, however, contain a variety of pollutants -not only dioxin derivatives but also other compounds such as odours, volatile organic compounds (VOCs) and the reaction intermediates of dioxins [516], VOCs are a major contributor to air pollution because of their toxic and malodorous nature and their contribution to ozone and smog formation [131], They are emitted from a wide range of industrial processes and transportation activities [131,162,519-521], Some representative VOCs are methanol, ethanol, 2-propanol, acetone and toluene. 

Fig. 7. TPD traces from alkyl iodides adsorbed on oxygen- (left) and hydroxide- (right) precovered Ni(lOO) surfaces. The bottom traces correspond to the formation of acetaldehyde from ethyl iodide, while those on top display the desorption of acetone from 2-propyl iodide conversion. The enhancing power of OH surface groups towards partial oxidation pathways is indicated by two observations from these data (1) the yield for acetone increases to the point of resembling that seen with 2-propanol and (2) some acetaldehyde is detected as well. It is at the present time unclear if the OH groups favor the formation of alkoxide intermediates or the subsequent P-hydride elimination step.

Afsar et al. (1987) have developed a method to differentiate mancozeb from a mixture of maneb and zinc salts or from a mixture of maneb and zineb. Compounds are distinguished on the basis of color differences after treatment of the saturated solutions of fungicides in n-propanol-acetone mixture first with dithizone and then with monosodium dihydrogen phosphate. Stevenson (1972) presented a similar earlier method that distinguished maneb, zineb, mancozeb, and selected fungicidal mixtures by successive application of acid dithizone, sodium hydroxide, and acid dithizone to the spot. 

Extraction of water from an aqueous solution of ethanol Extraction of water from solutions of alcohols and acetone Extraction of water from an aqueous solution of ethanol Extraction of water from solutions of ethanol, pyridine Separation of Cs isomers Separation of benzeneM-heptane Extraction of water from an aqueous solution of ethanol Extraction of water from solutions of ethanol, acetic acid Separation of dichloroethane/trichloroethylene mixtures Extraction of water from solutions of ethanol, acetic acid Extraction of water from an aqueous solution of ethanol Extraction of water from an aqueous solution of ethanol Extraction of 1 -propanol, ethanol from an aqueous solution Extraction of water from solutions of ethanol and acetic acid... 

Crystals from methanol + ether, dec 162-163°. pK, 5.90 pK] 9.15. Very sparingly sol in water. Sol in ethanol, iso-propanol, acetone, ethyl acetate. 

It is imperative to have an accurate E value for the reference from the literature [55], Care has to be taken about solvent also, as Mukheijee et al [27] have demonstrated. For example, the E (MV /MV 0 is - 450 mV in aqueous system while it is - 330 mV in 2-propanol-acetone-aqueous (mixed) solvent. 

Many other amylose complexes are water-insoluble, and the complexes with methanol, 1-propanol, acetone, and butanone may be precipitated from solutions of amylose in methyl sulfoxide, as well as from aqueous solution. As amylose frequently forms crystalline complexes. X-ray diffraction patterns have been obtained for a number of them. Amylose-methyl sulfoxide complexes have a structure almost identical to those of amylose-ethylenediamine complexes, in which the complexing ratio is one ethylenediamine molecule per two n-glucose residues. The helix packing-diameter of the complexes, at least for complexes with linear aliphatic ketones, is dependent upon the chain-length of the molecule complexed, although other factors are also involved. ... 

The generally accepted formal potential, E°, of the NAD+/NADH redox couple at pH 7.0 (25 °C) is —315 mV versus normal hydrogen electrode (NHE)(—560 mV vs. saturated calomel electrode (SCE) [23, 24). From thermal data and the equilibrium constants of the ethanol/acetaldehyde and 2-propanol/acetone reactions catalyzed by alcohol dehydrogenase, a value of —320 mV was calculated, which was later recalculated to be —315 5 mV versus NHE by Clark [23]. Through direct potentiometric titrations using several different mediators and xanthine oxidase as catalyst, Rodkey [25, 26] obtained an E° value of —311 mV versus NHE (25 °C) and a temperature variation of the E° of —1.31 mV/ C in the range of 20 to 40 °C. A variation of the E° with pH of —30.3 mV/pH (30 C) was found, which... 

Gas samples from room air were also detected with PTR-MS to estimate the indoor air quality [4,123]. Samples were taken from five rooms constructed more than 20 years ago. Two rooms had been equipped with new furniture and carpets only 2 months before the measurements were done. The concentrations of formaldehyde and ethanol were quite similar in the old and newly furnished rooms. Acetaldehyde, methanol, propanol, acetone, and toluene were strongly enhanced in the two newly furnished rooms. It was also found that the concentration of formaldehyde in four of the five rooms was higher than the maximum concentration allowed by Austrian law for permanent exposure dose to human [4]. 

From seven organic solvents tested for diluting olive oil extracts (methanol, ethanol, acetonitrile, dimethyl sulfoxide (DMSO), 1-propanol, 2-propanol, acetone) in different... 

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