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在渣油热反应过程的初期，体系中出现了３类具有不同形貌特征和体相效应的第二液相，热处理温度是影响它们相分离特性的重要因素。热处理温度提高时，所有３类第二液相的相分离点均提前，其中化学第二液相相分离点的提前幅度最大，物理第二液相相分离点的提前幅度最小。物理第二液相的相分离点取决于渣油胶体体系的稳定性。根据渣油体系的胶状结构导出渣油体系的稳定性函数与其ＳＡＲＡ组成的关系为：Ｓ（Ｒｅ／Ａｓｐ，Ａｒ，Ｓａｔ）＝１．３６Ｒｅ／Ａｓｐ＋３．１１Ａｒ－１．８６Ｓａｔ。该式间接地指出了渣油热反应体系中各个虚拟组分对其相分离点的影响。
In the initial stage of thermal reaction, three kinds of second liquid phase with different morphologies and bulk phase appeared in the system. The temperature of heat treatment is an important factor affecting the phase separation characteristics. When the heat treatment temperature is increased, the phase separation points of all three types of the second liquid phase are advanced, in which the chemical second liquid phase separation point has the largest advance and the physical second liquid phase separation point has the smallest advance. The phase separation point of the physical second liquid phase depends on the stability of the residue colloidal system. According to the gel structure of the residue system, the relationship between the stability function of the residue system and its SARA composition is: S (Re / Asp, Ar, Sat) = 1.36Re / Asp + 3.11Ar-1.86Sat. The formula indirectly indicates the influence of each virtual component in the residue thermal reaction system on the phase separation point.