正己烷-乙醇-水三元体系的相平衡研究

Study on Phase Balance of Hexane-ethanol-water System in Flaxseed

研究正己烷-乙醇-水三元体系的相平衡及萃取中亚麻籽含水量与体系乙醇浓度的平衡关系。结果表明,乙醇-己烷-水构成的三元体系中,混溶程度随温度的升高和乙醇浓度的增大而增加。亚麻籽含水量与体系中乙醇浓度存在平衡关系,相应的平衡关系为:95%的乙醇浓度对应于7%～9%含水量的亚麻籽;90%的乙醇溶液对应于9%～11%含水量的亚麻籽;85%的乙醇溶液对应于10%～12%含水量的亚麻籽。

Phase balance of hexane-ethanol-water system and balance relation between water content in flaxseed and ethanol concentration for extraction were studied. Results showed that mutual solubility of hexane-ethanol-water system increases along with augmentation of temperature and ethanol concentration, which shows balance relation between water content of flaxseed and ethanol concentration of three fractions solvent system in the course of extraction. The corresponding balance relations are as follows： 95 % ethanol concentration in solvents to 7 %-9 % water content in flaxseed, 90% ethanol concentration in solvents to 9 %- 11% water content in flaxseed and 85 % ethanol concentration in solvents to 10 %-12 % water content in flaxseed.