Epoxidation of karanja (Pongamia glabra) oil by H2O2 |
| |
Authors: | Vaibhav V Goud Narayan C Pradhan Anand V Patwardhan |
| |
Affiliation: | (1) Department of Chemical Engineering, Indian Institute of Technology, 721302 Kharagpur, India |
| |
Abstract: | Epoxidation of karanja oil (KO), a nondrying vegetable oil, was carried out with peroxyacetic acid that was generated in situ from aqueous hydrogen peroxide and glacial acetic acid. KO contained 61.65% oleic acid and 18.52% linoleic acid, respectively,
and had an iodine value of 89 g/100 g. Unsaturated bonds in the oil were converted to oxirane by epoxidation. Almost complete
epoxidation of ethylenic unsaturation was achieved. For example, the iodine value of the oil could be reduced from 89 to 19
by epoxidation at 30°C. The effects of temperature, hydrogen peroxide-to-ethylenic unsaturation ratio, acetic acid-to-ethylenic
unsaturation ratio, and stirring speed on the epoxidation rate and on oxirane ring stability were studied. The rate constant
and activation energy for epoxidation of KO were 10−6 L·mol−1·s−1 and 14.9 kcal·mol−1, respectively. Enthalpy, entropy, and free energy of activation were 14.2 kcal·mol−1, −51.2 cal·mol−1·K−1, and 31.1 kcal·mol−1, respectively. The present study revealed that epoxides can be developed from locally available natural renewable resources
such as KO. |
| |
Keywords: | Hydrogen peroxide in situ epoxidation karanja oil kinetics peroxyacetic acid sulfuric acid |
本文献已被 SpringerLink 等数据库收录! |
|