Autoxidation of Isobutyraldehyde
Shingo Miyajima,Takashi Inukai,Hiroshi Harada,Ryo Yoshizawa,Tadahiro Hirai,Kazutoshi Matsunaga,Harada Masato +6 more
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TLDR
In this paper, the liquid phase autoxidation of isobutyraldehyde to peroxyisobutyric acid with ozone as an initiator was investigated and the selectivity of the peroxyacid increases with decrease in the amount of aldehyde converted per unit volume of reacting fluid, increase in the ozone feed rate, and decrease in temperature.Abstract:
The liquid phase autoxidation of isobutyraldehyde to peroxyisobutyric acid was investigated with ozone as an initiator. The selectivity of the peroxyacid increases with decrease in the amount of aldehyde converted per unit volume of reacting fluid, increase in the ozone feed rate, and decrease in temperature. A few percent of water in solvents increases the selectivity, although too much water brings about a reverse effect. Isopropyl alcohol, acetone, isopropyl formate, propane, propylene, carbon dioxide, and carbon monoxide are observed as by-products besides isobutyric acid. Purified peroxyisobutyric acid (97.2 wt%) was obtained by fractionally distilling the autoxidation product and some of its physical properties were determined. The utility of the peroxyacid as an epoxidizing agent is described.read more
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Journal ArticleDOI
Liquid-phase Oxidation of Aldehydes
S. A. Maslov,E. A. Blyumberg +1 more
TL;DR: In this article, the kinetics and mechanism of low-temperature liquid-phase oxidation of various classes of aldehydes is surveyed, and the mechanism of the elementary stages under various conditions, with thermal and photochemical initiation, in the presence of catalysts, in various solvents.
Book ChapterDOI
Chapter 2 The Liquid Phase Oxidation of Aldehydes
Lucien Sajus,I. Sérée De Roch +1 more
TL;DR: In this article, the authors discuss the liquid phase oxidation of aldehydes and the role of active radical species in the process of liquid phase autoxidation by molecular oxygen.
Journal ArticleDOI
Formation of volatile compounds and brown products in the model system n-hexanal-glycine.
J Davídek,J Jirouŝová +1 more
TL;DR: During the boiling of a mixture of n-hexanal and glycine in aqueous medium, pH value 9, both soluble and insoluble brown colored pigments and volatile compounds were formed.
Journal ArticleDOI
Reactions of oxidized lipids with protein. Part 13. Autoxidation of hexanal in presence of nonlipidic components.
TL;DR: The presence of peroxides was percepted in the odour by sensory analysis contrary to nonvolatile lipid hydroperoxides, and was higher in mixture with casein or lysine-impregnated cellulose than with cellulose.
Journal ArticleDOI
Bildung flüchtiger Verbindungen und brauner Produkte in dem Modell n-Hexanal-Glycin
Jiři Davidek,Jana Jiroušová +1 more
TL;DR: In this article, wasserunlosliche pigments were gebildet, i.e., 0.57% Stickstoff, and were used for konjugierten Doppelbindungen, Carbonyl-and Carboxylgruppen.
References
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Preparation of Aliphatic Peroxyacids
TL;DR: In this paper, a method for peracetic and perpropionic acids as anhydrous solutions in solvents of negligible acidity is described, based on the reaction of carboxylic acids with hydrogen peroxide and employs azeotropic removal of water to drive the reaction to completion.