Research on the Extraction of Plant Volatile Oils
Microwave-assisted extraction will probably be the main technique in the nearfuture for industrial essential oil production1. Two kinds of new methods for essential oilextracting were used in this paper: microwave-assisted extraction (MAE) and supercritica Icarbon dioxide extraction (SC- CO2). The steam extraction system was designed by ourselvesaccording to Chinese Pharmacopoeia. The device has a double advantage of the fast with microwav eassisted extraction and of high purification with the Chinese Pharmacopoeia. The optimum extraction conditions for SC-CO2 were obtained by parallel and uniform design experiments, andsearched for the method of purifying product by reduced pressure distillation. The compare ofthe volatile oils from Lavender from the two extractions was made via gas chromatographyThe optimum conditions of Lavender essential oil extracted by supercritical CO2 extraction process:extraction pressure 22 MPa, extraction temperature 45 ?, extraction time of 1h, and the factors influence on the extraction rate is: extraction pressure> extraction temperature> extraction time. The yield of the product extracted under the optimal conditions was 4.80％. The results from GC analysis show that: the amount of the component of lavender essential oil is 84 obtained by microwave combination of steam distillation with more than of 0.05％ before the retention time of 40 minutes, compared with supercritical received only 65. The microwave-assisted extraction combined steam distillation is a good process for sample pretreatmen with convenient operation and high effective ingredient, and is more suitable for analysis. The supercritical carbon dioxide extraction is a good method with high yield, high relative content and large treat amount for industrial production.
volatile oils from Lavender,supercritical carbon dioxide microwave-assisted extraction,optimum extraction condition
Chen Zhi-ling Cao Hui-lin Cui Hai-yan Chao Jian-ping Bi Wei-tao Li Mo-lin
Dept. of Chemical Engineering Beijing Institute of Petro-chemical Technology Beijing, China 102617 Dept. of Biosciences China Agricultural University Beijing, China 100193 Dept.of Chemical Engineering Beijing Institute of Petro-chemical Technology Beijing, China 102617
国际会议
成都
英文
241-245
2011-01-14（万方平台首次上网日期，不代表论文的发表时间）