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Extraction of Camphor Tree Essential Oil by Steam Distillation and Supercritical COsub.2 Extraction
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Extraction of Camphor Tree Essential Oil by Steam Distillation and Supercritical COsub.2 Extraction
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Journal Article
Extraction of Camphor Tree Essential Oil by Steam Distillation and Supercritical COsub.2 Extraction
2022
Overview
The essential oil extracted from Cinnamomum camphora leaves is a mixture of volatile compounds, mainly terpenes, and is widely used in medicine, perfume and chemical industries. In this study, the extraction processes of essential oil from Cinnamomum camphora leaves by steam distillation and supercritical CO[sub.2] extraction were summarized and compared, and the camphor tree essential oil was detected by GC/MS. The extraction rate of essential oil extracted by steam distillation is less than 0.5%, while that of supercritical CO[sub.2] extraction is 4.63% at 25 MPa, 45 °C and 2.5 h. GC/MS identified 21 and 42 compounds, respectively. The content of alcohols in the essential oil is more than 35%, and that of terpenoids is more than 80%. The steam extraction method can extract volatile substances with a low boiling point and more esters and epoxides; The supercritical method is suitable for extracting weak polar substances with a high alcohol content. Supercritical CO[sub.2] extraction can selectively extract essential oil components and effectively prevent oxidation and the escape of heat sensitive substances.
Publisher
MDPI AG
Subject
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