摘要
以常压渣油为原料,采用分子蒸馏和高真空釜式蒸馏分别对其进行窄馏分切割,得到8个窄馏分蜡油和1个减压渣油馏分。通过计算馏分油的收率绘制蒸馏曲线,并对馏分油的密度、折光率、平均相对分子质量、运动黏度等性质进行了对比。结果表明,在相同馏出温度下,分子蒸馏所得馏出物的收率大于高真空釜式蒸馏,前者350~540℃蜡油收率较后者增加2.22个百分点。随着馏程提高,采用2种蒸馏方法得到的窄馏分蜡油的密度、折光率和平均相对分子质量均增加,三者变化规律相似。
With atmospheric residue as raw mate- rial,8 narrow fractions of vacuum gas oil（VGO） and 1 fraction of vacuum residue were obtained by mo- lecular distillation and high vacuum distillation re- spectively. Distillation curves of the two distillation methods were plotted, and the property parameters of the cut fractions, such as density, refractive index, average ~relative molecular mass, dynamic viscosity and element content were compared. The results showed that molecular distillation had higher yield than high vacuum distillation at the same distillationtemperature, and the yield difference between the 2 distillations was up to 2.22 percent points in 350- 540 ℃. With increasing the cutting tempera- ture, the properties of these two series of cut frac- tions, such as density, refractive index and average relative molecular mass increased, which exhibited similar changing trends.
出处
《石化技术与应用》
CAS
2015年第6期531-535,共5页
Petrochemical Technology & Application
关键词
分子蒸馏
高真空釜式蒸馏
常压渣油
密度
折光率
平均相对分子质量
molecular distillation
high vacuumdistillation
atmospheric residue
density
refractiveindex
average relative molecular mass
