Optimization of batch distillation process for purification of Cinnamic Aldehyde from Cinnamomum Cassia Oil
Abstract
Cinnamic aldehyde is the major component of cinnamomum cassia oil (~ 75% mass). Normally, high purity of cinnamic aldehyde (greater than 99% mass) can be obtained from the cinnamomum cassia oil by using a high vacuum batch distillation (~ 1 mmHg). In the purification process, a large amount of cinnamic aldehyde is lost because it is entrained by light and middle product cut – off streams. Moreover, energy consumption of the distillation is very high due to long separation time. In this paper, the optimization of a batch distillation process for purifying cinnamic aldehyde from the cinnamomum cassia oil is proposed. Firstly, a short-cut design method for the batch distillation working at constant reflux is applied to obtain preliminary configuration of the column and process parameters. Secondly, optimal operating conditions of the purification are evaluated based on three quality indexes including Luyben’s capacity factor (CAP), total annual cost (TAC), and annual profit.
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