Method and apparatus for separating benzaldehyde, phenylpropyl aldehyde, cinnamaldehyde, cinnamyl acetate and o-methoxycinnamaldehyde from cinnamon oil

Abstract

The present invention discloses a method and an apparatus for separating benzaldehyde, phenylpropyl aldehyde, cinnamaldehyde, cinnamyl acetate and o-methoxycinnamaldehyde from cinnamon oil. The method comprises: (1) dewatering cinnamon oil, wherein vapor distillation is performed to obtain cinnamon oil, and anhydrous sodium sulfate is added, wherein a weight ratio of anhydrous sodium sulfate to cinnamon oil is 1:10-1:12; and (2) adding the treated cinnamon oil to a material tank, and controlling the rectification column temperature, the evaporation temperature, the reflux ratio and the vacuum degree so as to respectively obtain benzaldehyde having the purity of more than or equal to 60% and the yield of more than or equal to 50%, phenylpropyl aldehyde having the purity of more than or equal to 50% and the yield of more than or equal to 40%, cinnamaldehyde having the purity of more than or equal to 99% and the yield of more than or equal to 85%, cinnamyl acetate having the purity of more than or equal to 30% and the yield of more than or equal to 80%, and o-methoxycinnamaldehyde having the purity of more than or equal to 30% and the yield of more than or equal to 85%. The apparatus combines advantages of molecular distillation and rectification, such that the concentrations of benzaldehyde and other components are significantly increased, the product yield is significantly increased, the production cost is substantially reduced, and the low energy consumption and efficient separation of a plurality of heat-sensitive materials can be achieved at a low temperature.

Description

Technical field [0001] The invention relates to the field of separation of spices, in particular to a method and device for separating benzaldehyde, phenylpropanal, cinnamaldehyde, cinnamyl acetate and o-methoxycinnamaldehyde from cinnamon oil. Background technique [0002] Cinnamon is mainly distributed in Guangxi and Guangdong in China. Cinnamon oil can be obtained from the bark, branches and leaves of cinnamon after steam extraction. my country is a large exporter of cinnamon oil, which accounts for about 80% of the world’s exports, but mainly crude cinnamon oil is exported with low added value. The method of increasing the content of components in cinnamon oil or separating them from cinnamon oil is called single ionization. For cinnamon oil separated products with higher purity, the added value of the products will be significantly improved. In this regard, further research and development are urgently needed. The main component of cinnamon oil is cinnamaldehyde, which acc...

AI Technical Summary

Problems solved by technology

The disadvantage of the above-mentioned studies is that although the yield of cinnamon essential oil is high, the purity of cinnamaldehyde is low, and it is difficult to meet the requirements for high-purity natural cinnamaldehyde

This study shows that in the absence of a substrate circulation pump, it is difficult to ensure the recovery of the product while increasing the concentration of the product, so it is difficult to achieve industrial production

[0008] It can be seen that in the aforementioned patents and literature reports, there are problems such as low separation efficiency, high cost, large energy consumption and waste of resources when using vacuum distillation, molecular distillation technology, and rectification technology to separate effective components in cinnamon oil.

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