Accession Number : AD0848434

Title :   Kinetics and Mechanism of the Thermal Disintegration of Acetylacetone,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Geiseler, G. ; Scherzer, K.

Report Date : 24 JUN 1968

Pagination or Media Count : 19

Abstract : The thermal disintegration of acetylacetone is submitted to a thorough investigation utilizing both statically and dynamically operating measuring apparatus. Under static test, disintegration satisfactorily occurred in the range of 375 to 450C, with an initial pressure of 300 tons. Free radicals are determined utilizing the Paneth metal mirror technique. An induction period could not be determined. In all, propylene acts in a markedly inhibitive manner, and the gross reaction obeys the time law of the first order. Under dynamic measurement, disintegration was investigated in the range of 450 to 540C. Durations were between 10 and 180 seconds. Principal products of disintegration were: 50 to 60% by volume of acetone, 15 to 25% by volume of methane, 20 to 25% by volume of carbon monoxide and 5 to 10% by volume of carbon dioxide. Semi-quantitative gas chromatographic and infrared spectroscopic analysis of the disintegration products enable the clarification of various divider processes. A radical chain mechanism is proposed which under application of the principle of stationariness, leads to a time law of the first order which is in satisfactory agreement with that found empirically. (Author)

Descriptors :   *PYROLYSIS), (*PENTANONES, REACTION KINETICS, FREE RADICALS, PROPENES, INFRARED SPECTRA, GAS CHROMATOGRAPHY, CARBON DIOXIDE, WEST GERMANY.

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE