沸程
- boiling range
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用气相色谱法同时测定石油苯的结晶点、密度、沸程及纯度
Simultaneous Determination of Crystallization Point . Density . Boiling Range and Purity of Petroleum Benzene by Gas Chromatography
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研究中还找到一个简便有效的对β-胡萝卜素的提取方法,选用盐酸-热处理法进行细胞破壁,并选用沸程为60~90℃的石油醚进行萃取。
In the extracting study , it has showed hydrochloric acid-heat treatment is a simple , convenient and effective extracting methods is which was used to destroy the cell wall , and the extracting organic solvent is petroleum ether whose boiling range is 60 ~ 90 ℃ .
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GB/T615-1988化学试剂沸程测定通用方法
Chemical reagent & General method for the determination of distillation range
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GB/T7534-1987工业用挥发性有机液体沸程的测定
Volatile organic liquids for industrial use & Determination of boiling range
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一种预测重质油沸程的方法
A method for prediction of distillation range of heavy oils
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结果显示,随着馏分沸程的增加,硫、氮等杂原子含量以及碱性氮和非碱性氮含量的增加。
The results showed that the amounts of sulfur , total nitrogen , basic nitrogen and non-basic nitrogen increased with the fraction boiling ranges .
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环烷酸的分子量分布情况与馏分的沸程趋势相一致,随着馏分变重、酸值增加,环烷酸的平均分子量增大、分布变宽、碳数范围增大;
As fraction becomes heavier and acid value increases , the average molecular weight of naphthenic acid increases , its distribution gets wider and the carbon number range increases .
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催化剂内部的结焦前驱物主要为芳香族碳氢化合物,这些化合物的沸程范围在350~650℃。
The results indicates that precursors of coke deposited inside the pore of the molecular sieve are mainly aromatic hydrocarbons with the boiling points ranging from 350 ° C to 650 ° C.
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由于流经稳定塔重沸器壳程的介质中含有大量硫化物,致使20号钢管束腐蚀严重,最短的仅运行7天即发生了泄漏。
As the media flowing through the shell pass of the stabilizer reboiler contained large amount of sulfides , the 20 # steel tubes were severely corroded and some tubes leaked only 7 days after the operation .
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萃取精馏主要用于分离共沸物和近沸程物系。
Extractive distillation is mainly used to separate azeotrope and components of narrow boiling range .