The extraction and refining process includes distillating washingoil or anthracene oil to get fluorene distillate, then crystallizing the fluorene distillate to get fluorene using cooling or solvent.
Based on the framework of the components phase equilibrium, the process of gas washing can deplete then-alkanes of the oil and produce the subsequent condensates.
在各组分气液溶解平衡的格架下，气洗作用将导致残余油中正构烷烃的大量损失以及次生凝析气藏的形成。
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Water - washing and dehydrating steps in the old process are left out in the new one, of which the main advantages are: no sewage discharge. low energy consumption, less time and low oil loss.