亚临界生物萃取技术概述

溶剂在高于其沸点但低于临界点的温度区间内，在一定压力下以液化状态存在，我们定义为溶剂的亚临界状态。在此状态下利用其相似相溶的物理性质，用作生物成分萃取的溶剂为亚临界萃取溶剂，其萃取工艺称为亚临界萃取工艺。适合在室温及更低温度下萃取和脱溶的溶剂，我们定义为低温亚临界溶剂，目前适合工业生产的低温亚临界溶剂主要有丙烷、丁烷、二甲谜、四氟乙烷、液氨5种。用一句话概括：低温亚临界生物萃取工艺是一种低温低压高效的物理方法。

Overview of subcritical extraction technology

A solvent exists in a liquefied state at a certain pressure in a temperature interval above its boiling point but below its critical point, which we define as the subcritical state of the solvent. The solvents used for extraction of biological components in this state are subcritical extraction solvents by utilizing their physical properties of similar solubility, and their extraction processes are called subcritical extraction processes. Suitable for extraction and desolvation solvents at room temperature and lower temperatures, we define as low-temperature subcritical solvents, currently there are five main low-temperature subcritical solvents suitable for industrial production: propane, butane, dimethyl enigma (DME), tetrafluoroethane(R134a), and liquid ammonia. Summarized in one sentence: Subcritical extraction process is a low-temperature, low-pressure and high-efficiency physical methods.