The Mechanism of the Thermal Decomposition of Methyl Ethyl Ketone

Rates and products have been determined for the thermal decomposition of sec-butyl peroxide at 110–150 °C in several solvents.The decomposition was shown to be unimolecular with energies of activation in toluene, benzene, and cyclohexane of 35.5 ± 1.0, 33.2 ± 1.0, 33.8 ± 1.0 kcal/mole respectively. The activation energy of thermal decomposition for the deuterated peroxide was found to be 37.2 + 1.0 kcal/mole in toluene.About 70–80% of the products could be explained by known reactions of free alkoxy radicals, and very little, if any, disproportionation of two sec-butoxy radicals in the solvent cage could be detected.The other 20–30% of the peroxide yielded H2 and methyl ethyl ketone. The yield of H2 was unaffected by the nature or the viscosity of the solvent, but H2 was not formed when s-Bu2O2 was photolyzed in toluene at 35 °C nor when the peroxide was thermally decomposed in the gas phase.α,α′-Dideutero-sec-butyl peroxide was prepared and decomposed in toluene at 110–150 °C. The yield of D2 was about the same as the yield of H2 from s-Bu2O2, but the rate of decomposition (at 135 °C) was only 1/1.55 as fast.Mechanisms for hydrogen production are discussed, but none satisfactorily explains all the evidence.

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Study of thermal decomposition of methyl ethyl ketone peroxide using DSC and simulation

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2006.06.103 ◽

2007 ◽

Vol 142 (3) ◽

pp. 765-770 ◽

Cited By ~ 32

Author(s):

Jo-Ming Tseng ◽

Ying-Yu Chang ◽

Teh-Sheng Su ◽

Chi-Min Shu

Keyword(s):

Thermal Decomposition ◽

Methyl Ethyl Ketone ◽

Methyl Ethyl Ketone Peroxide ◽

Methyl Ethyl

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Preparation and characterization of nanocrystalline NiO by the thermal decomposition of oxalate salts for the dehydrogenation of 2-butanol to methyl ethyl ketone

Aswan University Journal of Environmental Studies ◽

10.21608/aujes.2021.77260.1025 ◽

2021 ◽

Vol 0 (0) ◽

pp. 0-0

Author(s):

abouelhassan gomaa ◽

samih halawy ◽

adel abdelkader

Keyword(s):

Thermal Decomposition ◽

Methyl Ethyl Ketone ◽

Methyl Ethyl

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Kinetics of the thermal decomposition of hexafluoroazomethane and the reaction of trifluoromethyl radicals with methyl ethyl ketone

The Journal of Physical Chemistry ◽

10.1021/j100843a008 ◽

1969 ◽

Vol 73 (9) ◽

pp. 2838-2845 ◽

Cited By ~ 2

Author(s):

Thomas Howard McGee ◽

Charles E. Waring

Keyword(s):

Thermal Decomposition ◽

Methyl Ethyl Ketone ◽

Methyl Ethyl ◽

Kinetics Of

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Isotopic tracer studies of the thermal decomposition of tert . -butyl hydroperoxide

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1966.0091 ◽

1966 ◽

Vol 291 (1425) ◽

pp. 235-243 ◽

Cited By ~ 6

Keyword(s):

Thermal Decomposition ◽

Methyl Ethyl Ketone ◽

Probable Mechanism ◽

Methyl Ethyl ◽

Reaction Products ◽

Mechanism Of Formation ◽

Tracer Studies ◽

Butyl Hydroperoxide ◽

Tert Butyl Hydroperoxide ◽

Slow Combustion

The thermal decomposition of tert . -butyl hydroperoxide has been investigated at temperatures from 245 to 440 °C and the effects of added oxygen and acetone on the nature and distribution of the reaction products have been determined. Experiments in the presence of [1, 3- 14 C] acetone at 340 °C show that the major part of the methyl ethyl ketone formed from tert . -butyl hydroperoxide is produced via further reactions of acetone, and degradation of the labelled methyl ethyl ketone indicates the distribution of activity throughout the molecule. These results yield valuable information regarding the probable mechanism of formation of the ketone. The measurements carried out, when considered in relation to earlier work on the slow combustion of isobutane, suggest that tert . -butyl hydroperoxide does not play an important part as an intermediate during the oxidation of the corresponding hydrocarbon.

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