乙醇/己烷混合溶剂一次性浸提油茶枯饼

Extraction of defatted cake of oil tea camellia by ethanol and hexane mixture

对 95%乙醇和己烷构成的混合溶剂的特性、茶油对混合溶剂的混溶性质及混合溶剂对油茶枯饼的浸出工艺进行了研究。结果表明 :95%乙醇和己烷的体积比在 7∶30～ 4∶6范围内 ,两者均可混溶。茶油对混合溶剂的混溶温度有提高的趋势 ,混合溶剂对茶油的最大溶解度在 1 4 0 %左右。当 95%乙醇和己烷的体积比为 5∶5,浸出温度为 58℃ ,料液比为 2∶1 ,浸出时间为 5h时 ,对残油和油茶皂素的提取较合适 ;残油和油茶皂素的得率分别为 3 6%和7 0 %。表 6参

The property of mixed solvent composed of 95%ethanol and hexane(MSEH),the effect of oil tea camellia seed oil(OCSO)on the mixing solubility of MSEH and the technique of extraction of defatted cake by MSEH were studied.The results showed that with the ratios form 7∶3 to 4∶6,95% ethanol and hexane could be dissolved.Adding OCSO,the mixing soluble temperature was promoted.The maximum solubility of OCSO by MSEH was 14% or so.The defatted cake was extracted under the following suitable conditions:the extracting temperature,58 ℃;the MSEH cake ratio,2∶1;95%ethanol hexane ratio,5∶5;the extracting time,5 hours.The 3 6 g residual oils and 7 0 g thea saponins were retrieved from 100 g defatted cake.