MECHANISM AND KINETICS OF THE COCL2-CATALYZED ESTERIFICATION REACTION OF CASTOR-OIL WITH OLEIC-ACID


ERDEMSENATALAR A., ERENCEK E., ERCIYES A. T.

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, cilt.72, sa.8, ss.891-894, 1995 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 72 Konu: 8
  • Basım Tarihi: 1995
  • Doi Numarası: 10.1007/bf02542066
  • Dergi Adı: JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
  • Sayfa Sayıları: ss.891-894

Özet

The apparent orders of the Lewis acid-catalyzed esterification reactions between castor oil and oleic acid are known to change with the catalyst used and with the reaction temperature. A mechanism is proposed in this study to explain the variations (with temperature) in the apparent orders oi the cobalt chloride-catalyzed esterification reaction between castor oil and oleic acid. According to the proposed mechanism, an acid-catalyst intermediate forms in an initial, fast quasi-equilibrium step, and this intermediate then reacts with the oil to yield the products and to regenerate the catalyst in the rate-determining second step. A general rate expression, with an acid concentration term and a temperature-dependent constant in the denominator, is derived from the proposed mechanism and is verified with data obtained at different temperatures.