复合添加法制取糠醛产品萃取分离溶剂的性能与影响

采用溶剂萃取法分离和精制复合添加法由稻草、麦杆等制取的糠醛 ,研究了氯仿、1,2 -二氯乙烷、三氯乙烯、乙酸乙酯、四氯化碳等不同有机溶剂的萃取效果和物性 同时 ,对影响萃取效果的其他因素进行了分析 实验结果表明 ,对糠醛的萃取率氯仿最高 ,其次是 1,2 -二氯乙烷 ;影响萃取效果的主要因素是被萃液的酸度 图 5,表 1,参 6

Separate furfural from the process of adding complex additives with the extraction:comparing the character of the solvents and the analysis of effecting factors

The method of extraction to separate furfural from straw by adding complex additives has been used .It has studied the extractive effect and physical character of trichlormethane ,1,2-dichloroethane, trichloroethylene, dichloromethane, ethyl acetate and carbontetrachloride. In the same time, the other effecting factors on the extraction effect have been discussed. The experiment results have showed, trichlormethane has the highest effect of extraction for furfural , and 1,2-dichloroethane is in the next place. The acidity of extracted liquid is the major effecting factor on the extraction for furfural.5figs.,1tab.,6refs.