高效分离杉木精油中柏木醇的研究

High Efficient Separation of Cedrol from Chinese Fir Essential Oil

摘要: 利用减压精馏技术从杉木油中初步分离轻、重组分，再采用冷冻结晶的方法分离出柏木醇，GC/MS联用分析分离物中的柏木醇含量，确定最优工艺。通过研究减压精馏过程中不同回流比和全回流时间对收集的馏分中柏木醇的含量的影响，最终确定减压精馏条件为：在2~3 kPa条件下，全回流1 h，回流比值3~7时，柏木醇质量分数最高为97.89%，回收率为87.52%。将收集的柏木醇最高馏分用乙醇溶解、冷冻结晶，最终柏木醇纯度达到98.43%，回收率83.61%。

Abstract: The light and heavy components were preliminarily separated from the cedar oil by vacuum distillation technology, and then the cedrol was separated by the method of freezing crystallization. The cedrol content in the isolate was analyzed by GC/MS to determine the optimal process. By studying the effects of different reflux ratio and total reflux time in the vacuum distillation process on the content of cedrol in the collected fractions, the final determination of vacuum distillation conditions were 2-3 kPa, total reflux time for 1h, reflux ratio of 3-7, the highest mass fraction of cedrol was 97.89%, the recovery rate was 87.52%. The collected highest fraction of cedrol was dissolved in ethanol, and then frozen and crystallized, and the purity of cedrol was finally reached 98.43%, the recovery rate was 83.61%.