摘要
采用正交实验法对超临界CO2萃取桐油的条件进行了研究,考察了萃取温度、萃取压力、萃取时间在不同水平下对桐油出油率的影响,得到了桐油的最佳萃取工艺为:萃取压力30 MPa、萃取温度40℃、萃取时间5 h.通过对超临界CO2萃取的桐油与市售的压榨桐油的折光指数、碘值以及酸值等指标的测定表明,应用超临界CO2萃取的桐油品质较好.
By the orthogonal experiments and using the extraction quantity of tung oil as the indicator, the influence of extracting pressure, extracting temperature and extracting time on oil yielding rate is studied, then the optimum conditions for supercritieal carbon dioxide extraction of tung oil is concluded, that is, extracting pressure of 30 MPa, extracting temperature of 40 ℃, the extracting time of five hours. By testing refractive index values, iodine value and acid value of extracted tung oil and squeezing tung oil in the market, it is concluded that extracted tung oil is of higher quality.
出处
《重庆工学院学报（自然科学版）》
2008年第7期153-155,共3页
Journal of Chongqing Institute of Technology
基金
重庆市教委科学技术研究项目(KJ070623)
关键词
超临界萃取
CO2
桐油
supercritieal extraction
carbon dioxide
tung oil
