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Pyrolysis of 1-phenyl-3-pyrazolidinone

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Abstract

Pyrolysis of 1-phenyl-3-pyrazolidinone (phenidone) was examined in static air atmosphere by the conventional dynamic heating technique in a derivatograph. The thermal stability of 1-phenyl-3-pyrazolidinone, its melting point and the kinetic parametersE, A andn of the first partial process of the pyrolysis at different heating rates were determined. It is shown that the thermal decomposition of 1-phenyl-3-pyrazolidinone in the presence of oxygen is a rather complicated process composed of several overlapping reactions. The pyrolysis is influenced by the conditions of thermal analysis.

Zusammenfassung

Die Pyrolyse von 1-Phenyl-3-pyrazolidinon (Phenidon) wurde mit einem Derivatographen in einer statischen LuftatmosphÄre und bei konventioneller dynamischer Aufheizung untersucht. Die thermische StabilitÄt und der Schmelzpunkt von 1-Phenyl-3-pyrazolidinon sowie die kinetischen ParameterE, A undn des ersten Teilprozesses der Pyrolyse für verschiedene Aufheizgeschwindigkeiten wurden bestimmt. Es stellte sich heraus, da\ die in Gegenwert von Sauerstoff verlaufende thermische Zersetzung von 1-Phenyl-3-pyrazolidinon ein ziemlich komplizierter, aus mehreren sich überlappenden Teilschritten bestehender Proze\ ist. Die Pyrolyse wird durch die Bedingungen der thermischen Analyse beeinflu\t.

РЕжУМЕ

пИРОлИж 1-ФЕНИл-3 пИРАжО лИДИНОНА (ФЕНИДОНА) Бы л ИсслЕДОВАН с пОМОЩьУ ДЕРИВАтОгРАФА В стАт ИЧЕскОИ АтМОсФЕРЕ ВО жДУхА пРИ ОБыЧНОМ ДИНАМИЧЕскО М НАгРЕВЕ. ОпРЕДЕлЕНы тЕРМОУст ОИЧИВОсть сОЕДИНЕНИ ь, ЕгО тОЧкА плАВлЕНИь И кИНЕтИЧЕ скИЕ пАРАМЕтРыE, A Иn Дль пЕРВОгО ЧАстИ ЧНОгО пРОцЕссА пИРОл ИжА, пРОВЕДЕННОгО пРИ РАж лИЧНых скОРОстьх НАгРЕВА. УстАНОВлЕНО, ЧтО тЕРМИЧЕскОЕ РАжл ОжЕНИЕ 1-ФЕНИл-3-пИРАжОлИДИНОН А В пРИсУтстВИИ кИслОРОДА ьАльЕтсь с лОжНыМ пРОцЕссОМ, сОс тОьЩИМ Иж НЕскОлькИх пЕРЕкРыВ АУЩИхсь РЕАкцИИ. пРОцЕсс пИРО лИжА жАтРАгИВАЕтсь У слОВИьМИ тЕРМИЧЕскОгО АНАлИж А.

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Authors and Affiliations

  1. Institute of general food chemistry, Technical university of łódź, Ul. stefanowskiego 4/10, 90-924, łó dź, Poland

    M. E. Guzek & J. Masłowska

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  1. M. E. Guzek
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  2. J. Masłowska
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Guzek, M.E., Masłowska, J. Pyrolysis of 1-phenyl-3-pyrazolidinone. Journal of Thermal Analysis 29, 933–940 (1984). https://doi.org/10.1007/BF02188839

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