| Summary: | ABSTRACT:
There have been a number of studies on alcoholysis of vegetable oils, but the oil conversion is not so high, due to equilibrium limitation. One method of increasing the oil conversion is to remove glycerine, by adding sodium chloride.
Ethanolysis of castor-oil in the presence of sodium chloride was carried out in an autoclave equipped with thermometer, manometer, heating and rotating devices. Samples were withdrawn at the end of the process, then analyzed for their glycerine content using the Asetin method.
The reaction was found to be .first order with respect to glyceride. Within the range of variables studied, temperature and amount of catalyst affected the reaction rate constant exponentially. Using 0.05 gram of NaCl per gram of castor oil and equivalent ratio of ethanol to castor oil of 5.16. the relative favourable process conditions were found to be 105 minutes of reaction time, temperature of 383 K, and 0.005 gram of catalyst (NaOH) per gram of castor oil. Glyceride conversion of 64.60 % was obtained under these condition.
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