Optimization of Supercritical CO_2 Extraction of Hovenia dulcis Thunb. Seed Oil by Orthogonal Test Methodology

摘要

The objective of the work was to optimize the extraction of Hovenia dulcis Thunb. seedoil (HSO) by means of supercritical fluid extraction (SFE). Effects of pressure, temperature, timeand CO_2 flow rate on extract abilities of HSO were studied in this paper. Basis on the signal factortest the orthogonal design was used to optimize the extraction conditions. Results showed thatfollowing conditions were optimal: pressure 40Mpa, temperature 40 °C, time 120min, CO_2 flow rate9 kg/h. Extraction yield of HSO were 8.92%. Supercritical CO_2 technology was a good extractionmethod for its higher yield and shorter time.