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超临界流体萃取(SFE)是一种高选择性、节能的新型分离技术,有关其过程开发中的若干问题,笔者已作过综述。要开发这种新的分离过程有许多技术问题有待解决,其中尤以增大溶质组分的溶解度和提高要分离组分的选择性为关键,本文将对携带剂的作用作进一步的评述。一、携带剂及其作用早在1974年,Peter提出了在超临界流体(SF)中加入少量混溶的有机化合物以增加其溶解能力的概念,例如在丙烷—乙烯—硬脂酸—油酸体系中加苯来提高脂肪酸在SC_3H_6—C_2H_4中的溶解度。而“携带剂(entrainer)”这个名词,则由Panzer等正式提出,在用
Supercritical fluid extraction (SFE) is a new separation technology with high selectivity and energy saving. The author has reviewed some problems in the process of its development. There are a number of technical issues to be solved in order to develop this new separation process, with particular emphasis on increasing the solubility of the solute components and increasing the selectivity of the components to be separated. This article will further comment on the role of carrier agents. First, the carrier and its role As early as 1974, Peter proposed the concept of adding a small amount of miscible organic compounds in the supercritical fluid (SF) to increase its ability to dissolve, such as propane - ethylene - stearic acid - oleic acid In the system, benzene was added to improve the solubility of fatty acids in SC_3H_6-C_2H_4. The term “entrainer” was formally proposed by Panzer et al