【摘要】 探讨了乙醇为溶剂热回流提取油茶饼中残油的方法。通过单因素实验及正交实验考察了乙醇体积分数、液料比、浸提温度、浸提时间及提取次数对油茶饼中残油收率的影响,确定了优化的提取条件为:乙醇体积分数95%、液料比10∶1(mL∶g)、浸提温度92℃、浸提时间3h、提取次数2次。在此优化条件下,油茶饼中平均残油收率达到残油含量的96.04%。研究结果表明,乙醇具有替代6号溶剂油提取油茶饼中残油的前景。更多还原

【Abstract】 The extraction method of residual oil in defatted cake of camellia using ethanol as solvent had been investigated by heating reflux.Effects of ethanol volume fraction,liquid-solid ratio,extraction temperature,extraction time and extraction times on extraction rate of residual oil were discussed by single factor experiment and orthogonal experiment,respectively.The optimal conditions were obtained as follows:ethanol volume fraction of 95%,liquid-solid ratio of 10∶1(mL∶g),extraction temperature of 92 ℃,extraction time of 3 h and extraction times of twice.Under above conditions,the average extraction rate of residual oil was 96.04% of residual oil content.The results showed that ethanol was a promising solvent substituted for solvent No.6 for extracting residual oil in defatted cake of camellia.更多还原