✦ LIBER ✦

The thermal decomposition of biacetyl

✍ Scribed by H. Knoll; K. Scherzer; G. Geiseler

Publisher: John Wiley and Sons
Year: 1973
Tongue: English
Weight: 562 KB
Volume: 5
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550050209

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✦ Synopsis

Abstract

The thermal decomposition of biacetyl has been studied at small percentage conversion over the temperature range 375‐417°C. For these conditions, an almost quantitative mass balance was obtained by gas‐chromatographic analysis. The following equation was obtained for the overall reaction
equation image
Between 240° and 277°C, the decomposition of biacetyl initiated by methyl radicals has also been studied. As source of radicals, the thermolysis of azomethane was used. Moreover, the Arrhenius parameters of the following reactions were determined:
equation image
where A is in sec^−1^ for reaction (1) and in cm^3^mole^−1^ sec^−1^ for reactions (3) and (4); E is in kcal/mole. Evidence is provided that the displacement reaction (4) proceeds by a two step mechanism.

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