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在渣油热反应体系中，凝聚态沥青质第二液相是焦的最直接物理化学前身物和制约渣油热转化过程经济性的关键因素。渣油组成对第二液相的形成特性具有最重要影响。将不同性质的渣油单油混合为配油，能够改善配油热反应体系中第二液相和焦的形成特性。在不同性质渣油单油的配油热反应体系中，与在相应的单油热反应体系中相比，第二液相的相分离点几乎总是提前，提前幅度由大至小的顺序是：化学第二液相＞化学物理第二液相＞物理第二液相；另一方面，在一定的热处理温度下，配油热反应体系中第二液相的相分离点随渣油配比的变化通常较小。特别是，当渣油单油的性质差别不大时，它们的配油热反应体系的相分离特性与单油热反应体系相当。
In the residue thermal reaction system, the second liquid phase of condensed asphaltene is the most direct physical and chemical precursor of coke and the key factor that restricts the economy of thermal conversion process of residual oil. Residue composition has the most important effect on the formation characteristics of the second liquid phase. Mixing different kinds of residue single oil into oil can improve the formation characteristics of the second liquid phase and coke in the hot reaction system. In the oil-in-hot reaction system of residue-oil with different properties, the phase separation point of the second liquid phase is almost always advanced compared with that in the corresponding single-oil thermal reaction system, and the order of the advance amplitude is : The second chemical liquid phase> the second chemical liquid phase> the second physical liquid phase; on the other hand, at a certain heat treatment temperature, the phase separation point of the second liquid phase in the oil- The changes are usually small. In particular, when the properties of residuum oils are not significantly different, the phase separation characteristics of their oil-heating reaction system are comparable to that of the single-oil thermal reaction system.