A method and device for separating benzaldehyde, phenylpropionaldehyde, 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 present invention relates to the field of separation of spices, and specifically to a method and device for separating benzaldehyde, phenylpropionaldehyde, cinnamic aldehyde, cinnamic acetate and o-methoxycinnamic aldehyde from cinnamon oil. Background technique [0002] Cinnamon is mainly distributed in Guangxi and Guangdong in China. Cinnamon oil can be obtained by steam extraction from the bark, branches and leaves of cinnamon. my country is a major exporter of cinnamon oil, accounting for about 80% of the world's exports. However, it mainly exports crude cinnamon oil with low added value. The method of increasing the content of components in cinnamon oil or separating it from cinnamon oil is called isolation. For isolated products with higher purity of cinnamon oil, the added value of the product will be significantly improved. In this regard, further research and development are urgently needed. The main component of cinnamon oil is cinnamic...

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.

Images