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1)  vacuum topping
减压拔顶蒸馏
2)  atmospheric topping
常压拔顶蒸馏
3)  topping distillation
拔顶蒸馏{化}
4)  vacuum overhead
减压蒸馏塔顶馏分
5)  vacuum distillation
减压蒸馏
1.
Fractionation of biodiesel by vacuum distillation;
生物柴油的减压蒸馏分割
2.
Effect of vacuum distillation to the quality of lubricant;
炼油减压蒸馏与润滑油产品质量的关系
3.
Expansion revamping of heavy oil vacuum distillation unit;
稠油炼制减压蒸馏装置的扩能改造
6)  reduced pressure distillation
减压蒸馏
1.
High performance rosin esters were produced by esterification reaction of pentaerythritol and toll oil rosin which was purified by reduced pressure distillation.
使用普通塔尔油松香和经过减压蒸馏纯化的精制塔尔油松香为原料 ,适当加入复合添加剂 ,通过酯化反应制得优质塔尔油松香改性树脂。
2.
The precursor solution were prepared by using a modified sol gel process, in which solid precursors of PZT were prepared through reduced pressure distillation first, and then the precurs.
溶胶的配制采用先通过减压蒸馏的方法得到干凝胶 ,再将干凝胶溶解在乙二醇甲醚中的方法得到 。
3.
Method:Zedoary turmeric oil was applied for reduced pressure distillation,and the fraction of distillate at 208~216℃ was assembled,recrysted in order to get the product.
方法:以莪术油为原料,进行减压蒸馏,收集208~216℃的馏分经重结晶得到产品,将其和对照品作差示量热光谱、红外光谱、核磁共振和质谱对比分析确定莪术醇;用高效液相色谱法测定其含量,色谱柱为ODS柱;以乙腈∶水(15∶85,V∶V)为流动相;流速为1。
补充资料:常减压蒸馏
分子式:
CAS号:

性质:又称原油三级蒸馏。原油首次加工的标准流程。原油首先通过换热器与热油换热,温度升到220~230℃入初馏塔,从塔顶分出部分轻汽油。初馏塔底油通过常压炉加热至350~370℃后进入常压塔,分出汽油、煤油、轻柴油、重柴油等。常压塔底重油经减压炉加热至400~410℃进入减压塔,蒸出催化裂化原料油或各种润滑油馏分。塔底减压渣油可作为氧化沥青、溶剂脱沥青或减黏裂化等各种原料。蒸馏装置通常包括三部分。(1)原油预处理。采用加入化学物质和高压电场联合作用下的电化学法除去原油中混杂的水和盐类。(2)常压蒸馏。原油在加热炉内被加热至370℃左右,送入常压蒸馏塔在常压(大气压力)下蒸馏出沸点较低的汽油和柴油馏分,残油是常压重油。(3)减压蒸馏。常压重油再经加热炉被加热至410℃左右,进入减压蒸馏塔在约8.799kPa绝压下蒸馏,馏出裂化原料的润滑油原料,残油为减压渣油。

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