Topic
Methyl isobutyl ketone
About: Methyl isobutyl ketone is a research topic. Over the lifetime, 2071 publications have been published within this topic receiving 26976 citations. The topic is also known as: Hexone & Isobutyl methyl ketone.
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TL;DR: A method for the separation and determination of neptunium in uranium-fission product mixtures using a twocycle extraction system is described in this article, where Neptunium is oxidized to 6+ with permanganate and quantitatively extracted as a nitrate complex into methyl isobutyl ketone.
Abstract: A method for the separation and determination of neptunium in uranium-- fission product mixtures uses a twocycle extraction system. Neptunium is oxidized to 6+ with permanganate and quantitatively extracted as a nitrate complex into methyl isobutyl ketone from an acid-deficient aluminum nitrate salting solution containing tetrapropylammonium nitrate. Neptunium is stripped from the ketone phase and simultaneously reduced to 4+ by contact with ferrous chloride--hydroxylamine solution, then quantitatively extracted into thenoyltrifluoro acetone-xylene. The extraction of uranium and plutonium is less than 0.1 and O.O1%, respectively. Ruthenium and zirconium, the only 80-day cooled fission products which follow the neptunium, are decontaminated to greater than 1 x 10/sup 4/.
10 citations
TL;DR: Aromatic 2-hydroxyaldehydes have been condensed with a number of aliphatic and aromatic amines to form a series of bi-, tri-and tetradentate Schiff bases, which have been used to extract Cu(II) into chloroform, methyl isobutyl ketone and toluene as discussed by the authors.
10 citations
TL;DR: In this article, a sensitive spectrophotometric method for determining trace amounts of chromium(VI) is described, where chromium oxidizes hydroxylamine quantitatively to nitrite at pH 4.0 ± 0.5.
Abstract: A sensitive spectrophotometric method for determining trace amounts of chromium(VI) is described. In the presence of acetate buffer, chromium(VI) oxidizes hydroxylamine quantitatively to nitrite at pH 4.0 ± 0.5. The nitrite diazotizes p-nitroaniline to form a diazonium salt that, in acidic medium, couples with N-(1-naphthyl)ethylenediamine dihydrochloride to form an azo dye with a molar absorptivity of 4.1 x 10 4 L/mol-cm at 545 nm. The color is stable for 5 h, and the system obeys Beer's law in the range 0-8 μg chromium(VI) in a final volume of 10 mL. The detection limit of chromium(VI) is 0.6 μg. Chromium(III) can be determined after it is oxidized with bromine water in alkaline medium to chromium(VI). Extraction of the azo dye in alkaline medium with methyl isobutyl ketone followed by addition of methanolic hydrochloric acid permitted determination of chromium(VI) down to 10 ng/mL. The method has been used to determine chromium in alloy steels, pharmaceutical preparations, and industrial effluents.
10 citations
TL;DR: In this paper, the dielectric constant and loss factor for binary liquid mixtures of ethyl methyl ketone and methyl isobutyl ketone+ethylenediamine at 9.44 GHz microwave frequencies at 30°C were determined.
Abstract: Values of dielectric constant (e′) and loss factor (e″) have been experimentally determined for binary liquid mixtures of ethyl methyl ketone+ethylenediamine and methyl isobutyl ketone+ethylenediamine at 9.44 GHz microwave frequencies at 30°C. The values ofe′ ande″ have been used to evaluate the molar polarization, apparent polarization and the excess permittivities. Excess refractive index, viscosity and activation energy of viscous flow have also been estimated. These parameters have been used to explain the formation of 1:1 complexes for both the systems.
10 citations
TL;DR: In this article, the intrinsic viscosity of several fractions of poly(phenyl methacrylate) with temperature in methyl isobutyl ketone has been explained in terms of a conformational transition of great magnitue due to the formation of specific interactions between phenyl groups.
10 citations