An asphalt-base crude is one containing a relatively high proportion of nonhydrocarbon constituents such as nitrogen, sulfur, and oxygen compounds.

沥青基原油含较高比例的非烃组分，如氮、硫、氧的化合物。

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Simple solvent recovery unit, a high recovery rate, flammable, explosive, toxic and easy oxidation of materials can be used as a nitrogen gas containing a closed-cycle wet, so that the safe operation.

溶剂回收装置简单，回收率高，对于易燃、易爆、有毒和易氧化的物料，可用氮气作为载湿气体进行闭路循环，使之安全操作。

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