部分互溶混合溶液主要使用於液液萃取程序和非勻相蒸餾製程中，本研究目的為解決部分互溶混合溶液在分類時所面臨到的閃火點缺乏的問題，利用群組貢獻度描述液體混合物活性係數之UNIFAC(Universal Quasi-chemical Functional Group Activity Coefficient)方程式，建立發展針對部分互溶混合溶液閃火點之預測模式。
本研究使用部分互溶有機水溶液以及部分互溶易燃液體之實驗數據來驗證模式的預測能力。研究結果顯示利用UNIFAC方程式來預測部分互溶溶液之閃火點於兩液相區的範圍雖然有所偏差，但各組成間的閃火點與實驗值相比，顯示有良好的預測能力。因此，本研究不需要過去文獻提供的相平衡參數，只利用群組貢獻度的官能基參數即可預測部分互溶溶液之閃火點，並可使用於預防液液萃取程序和非均勻相蒸餾製程火災爆炸及本質較安全設計。
The partially miscible mixtures are used in heterogeneous distillation process and liquid-liquid extraction process. This research aims at the deficiency improvement of necessity of experimental interaction parameters for the flash point prediction models proposed in the literatures by using UNIFAC (Universal Quasi-chemical Functional Group Activity Coefficient) type models. In this study, we were aim at the prediction model for partially miscible mixtures.
The partially miscible aqueous-organic mixtures and the partially miscible mixtures of flammable solvents were used to verify the prediction capability of the method. Our results revealed that the combined model is able to represent well the measured flash point over the entire flammable composition range of all studied binary and ternary mixtures, although there are some deviations in the estimated region of two liquid phases. However, we can predict the flash point of binary partially miscible mixtures without experimental binary interaction parameters. Based on this evidence, therefore, it appears reasonable to suggest potential application for our model in the assessment of fire and explosion hazards, and development of inherently safer designs for chemical process containing partially miscible mixtures.
