The extraction raffinate can be concentrated by one-stage evaporation to obtain sulfuric acid with 80% of mass fraction.
萃余液经一次性蒸发浓缩，可得到质量分数80%以上的硫酸。
In comparison with gasoline, light oil has more light fraction components and better evaporation property, but it has a lower octane number, higher evaporation pressure, and lower calorific value.
与车用汽油相比，轻油中轻质馏分较多，蒸发性好，但辛烷值低，蒸气压高、热值较低。
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