| 1. | Properties and components of narrow fractions of daqing and liaohe decanted oils
大庆和辽河油浆窄馏分的性质及组成 |
| 2. | Close cut separation
窄馏分分离 |
| 3. | Effect of reaction temperature on the product of aromatization reaction of fcc gasoline narrow fraction
反应温度对催化汽油窄馏分芳构化的研究 |
| 4. | The aromatic factors of liaohe decanted oil are much higher than those of daqing decanted oil at the same cumulative yield
在相同累积收率时，辽河油浆窄馏分的芳碳率远大于大庆油浆窄馏分。 |
| 5. | The metals have not been found in the narrow fractions of two feeds , which illustrates that sfef effectively traps the metals in the unextractable endcuts
窄馏分中的金属含量没有被检出，表明超临界流体萃取分馏将重金属浓缩于萃取残余物中。 |
| 6. | Supercritical fluid extraction and fractionation ( sfef ) are used to separate daqing and liaohe decanted oils into a number of narrow fractions
摘要以大庆和辽河油浆为研究对象，采用超临界流体萃取分馏技术将其切割成窄馏分，分析了油浆窄馏分的性质及组成随收率变化的规律。 |
| 7. | These series of products are blended with highly narrow boiling mineral oil and anti - oxidant , anti - foam , anti - emulsion additives . suitable for all types of vacuum pump lubrication
本产品系列是由深度精制的窄馏分矿物油与抗氧、抗泡、破乳等添加剂调配而成。适合各类真空泵的润滑。 |
| 8. | As the cumulative yield reaches 70 % for daqing decanted oil or 25 % for liaohe feed , the content of aromatics exceeds that of saturates and goes up rapidly while the saturates drop down by the same level
大庆、辽河油浆分别在累积萃取收率达70 %和25 %后，窄馏分中的芳香分含量超过饱和分且迅速增加，而饱和分含量相应下降。 |
| 9. | The density , viscosity , refractive index , molecular weight and sulfur amount of the fractions are on the increase with the increasing cumulative yield , while their molecular weight exhibits a narrow distribution from 300 to 400
研究表明，随累积萃取收率的增加，大庆和辽河油浆窄馏分的密度、粘度、折光率、硫含量及芳碳率呈增大趋势，油浆窄馏分的相对分子质量分布较窄( 300 ~ 400 ) 。 |
| 10. | Then , analytical work was carried out as follows : the ultimate analysis and physi - chemical analysis of the pyrolytic oil comprised a sketch of the fuel properties of the oil ; then , through the distillation analysis of the oil , the fraction composition of the " unrefined " oil was known . after that , a general knowledge of the aromaticity and saturation of the hydrocarbons in the oil was provided by the outcome of the ft - ir functional group analysis . also , from the analysis , the form of the polar functional groups and their distribution in different fractions of the oil were learned
文中首先对不同热解温度下热解油产率进行分析讨论，然后，针对热解油品质进行了一系列分析：通过元素组成和理化特性的分析，对热解油作为燃料特性有了一个大致了解；通过实沸点蒸馏分析，得到热解油作为一种未提炼油的馏分分布，并为后续热解油馏分的细入分析提供了前提；通过对热解全油和各窄馏分的ft - ir官能团分析，对热解油的芳香性、不饱和性有了整体的了解，并且清楚了热解油中的极性官能团存在型式及其在热解油不同馏分中的分布。 |
