Extraction and Characterization of Seed Oil from Naturally Grown Chinese Tallow Trees |
| |
Authors: | Xiao-Qin Yang Hui Pan Tao Zeng Todd F Shupe Chung-Yun Hse |
| |
Affiliation: | 1. Department of Chemical Engineering, Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, Jiangsu, 210037, People’s Republic of China 2. Calhoun Research Station, Louisiana State University Agricultural Center, Calhoun, LA, 71225, USA 3. School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA 4. Southern Research Station, USDA Forest Service, Pineville, LA, 71360, USA
|
| |
Abstract: | Seeds were collected from locally and naturally grown Chinese tallow trees (CTT) and characterized for general physical and chemical properties and fatty acid composition of the lipids. The effects of four different solvents (petroleum ether, hexane, diethyl ether, and 95 % ethanol) and two extraction methods (supercritical carbon dioxide (SC-CO2) and conventional Soxhlet) on the properties of the CTT seed oil, including Chinese vegetable tallow (CVT) and stillingia oil (SO), were also investigated. In general, the yields of CVT and SO did not vary based on solvent for Soxhlet extraction and solvent-free SC-CO2 extraction, except that the yield of CVT from SC-CO2 extraction was substantially lower. Nevertheless, the CTT seed oil, extracted by SC-CO2 displayed better quality than those extracted by Soxhlet extraction in terms of color, residual precipitation, and acid value of the oils. The pretreatment of CTT seed by 3 % aqueous sodium bicarbonate solution likely promoted the hydrolysis of triglyceride and caused the high acid value in the CVT samples. The iodine value at around 180 indicated that the SO is a highly unsaturated drying oil. Palmitic (76 %) and oleic (23 %) are two dominant fatty acids in CVT while linolenic (43 %), linoleic (31 %), and oleic (13 %) are the dominant fatty acids in SO. |
| |
Keywords: | Fatty acid compositions Lipid yield Oilseed crop Soxhlet extraction Stillingia oil Supercritical carbon dioxide extraction |
本文献已被 SpringerLink 等数据库收录! |
|