桐油的超临界二氧化碳萃取及溶解度研究  

Study on extraction of tung oil by supercritical CO_2

作　　者：王景娜[1] 刘乃汇[1,2] 田松江[1] 李淑芬[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072 [2]南开大学化工教研室,天津300071

出　　处：《现代化工》2009年第S1期130-132,134,共4页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(20776107)

摘　　要：采用超临界二氧化碳(SC-CO2)萃取技术对从桐籽中提取桐油的工艺进行了研究,考察了物料粒径、萃取温度、萃取压力等对桐油提取率的影响并得到适宜的操作条件。结果表明,优化条件下桐油提取率达到55.16%,桐油回收率达到91%。还利用SC-CO2萃取桐油的实验数据求得了桐油在SC-CO2中的溶解度,并用Chrastil方程对溶解度数据进行关联。在30～50℃和25～55MPa条件下,桐油在SC-CO2中的溶解度为0.004～0.026g/L。Chrastil方程关联的平均相对误差为8.41%。Extraction of tung oil from tung seed with SC-CO2 was investigated.The effects of some factors,such as particle size,extractive temperature,extractive pressure on the yield of tung oil are investigated and the optimum process parameters were obtained.The experimental results show that the extractive yield of tung oil can reach 55.16%,and the recovery of tung oil is about 91%.The solubility of tung oil in SC-CO2 were calculated based on experimental data of extraction process,and correlated by Chrastil equation.The results show that the solubility of tung oil in SC-CO2 is 0.004-0.026 g/L at 30～50℃ and 25～55 MPa.The values of average relative deviations(ARD) correlated by Chrastil equation is 8.41%.

关 键 词：超临界二氧化碳 萃取 桐油 溶解度 关联 

分 类 号：TE667[石油与天然气工程—油气加工工程]