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石油热转化过程包含由物理化学因素引起的相态分离与转化。第二液相的出现是相变化的初级阶段,碳质中间相的形成是相变化的中间阶段,焦的形成是相变化的高级阶段。与沥青质和碳质中间相类似,第二液相也是一种溶液度类物态,其工作定义为甲苯(或苯)不溶而为喹啉(或吡啶)可溶物。
The thermal conversion of petroleum involves phase separation and conversion due to physico-chemical factors. The appearance of the second liquid phase is a primary phase of phase change, the formation of a carbonaceous mesophase is an intermediate phase of phase transformation, and the formation of coke is an advanced phase of phase change. Similar to asphaltenes and carbonaceous intermediates, the second liquid phase is also a solution state, defined as toluene (or benzene) insoluble quinoline (or pyridine) solubles.