催化裂化油浆中烯烃分布研究

摘要

以某催化裂化油浆为原料,通过二烯值和溴价分析方法测定了其四组分和五个馏分中共轭烯烃(双键)和烯烃(双键)的含量;同时结合紫外光谱法、核磁共振氢谱法(1 H-NMR)对其四组分和五个馏分中的烯烃类型和含量进行了表征和测定.结果表明,催化裂化油浆中的确存在烯烃(双键)和共轭烯烃(双键),其烯烃(双键)和共轭烯烃(双键)的含量高达21%和6%,四组分中的共轭烯烃(双键)含量依次增多,五个馏分中共轭烯烃(双键)的含量在5%左右,且四组分和五个馏分中烯烃(双键)的含量均呈现先减小后增大的趋势.同时,不同组分和不同馏分之间正构α-烯烃和内烯烃的含量也存在差异.%The content of conjugated olefins (double bonds) and olefins (double bonds) in four fractions and five fractions of a FCC slurry was determined by the diene number and bromine number analysis method. UV and 1H-NMR were used to characterize and determine the type and content of olefins in the four fractions and five fractions. The results confirm that the olefin (double bond) and conjugated olefin (double bond) exist in FCC slurry,the contents of olefin(double bond) and conjugated olefin(double bond) are as high as 21% and 6%, the content of conjugated olefin (double bond) in the four components increased in turn, the content of conjugated olefin(double bond) in the five fractions was about 5%,and the content of olefin(double bond) in four components and five fractions all showed a trend of decreasing first and then increasing. At the same time, there are also differences in the content of normal alpha-olefins and internal olefins between different components and different fractions.