Publication Date:
2012-04-15
Description:
The rate of thermal isomerization of ocimene in the liquid phase has been investigated in the range 90–150 °C. The rate constant for the disappearance of ocimene may be expressed by k = 1. 3 × 10 10 e – 11994. 2/ T (min – 1 ), from which we can infer that the activation energy is 99.7 kJ mol –1 and the pre-exponential factor is 1.3 × 10 10 min –1 . The half-life for the disappearance of ocimene may be expressed by t 1/2 = 5. 2 × 10 – 11 e 11994. 2/ T (min). The conclusion has been supported by the study results that the ocimene is safe when temperature is below 100 °C. A discussion of the mechanism concerning the conversion is included. Copyright © 2011 John Wiley & Sons, Ltd. This work reports that the rate of the thermal isomerization of ocimene in the liquid phase is investigated in the range 90–150 °C. The conclusion is supported by the study results that ocimene is safe when temperature is below 100°C. Thus, not only do we design the apparatus for the preparation of ocimene by the pyrolysis of α-pinene, but also suggest that the boiling temperature of the reaction mixture of α-pinene be kept below 100 °C under vacuum.
Print ISSN:
0894-3230
Electronic ISSN:
1099-1395
Topics:
Chemistry and Pharmacology
,
Physics
