摘要
针对已知结构α烯烃的标准谱图缺少的问题,提出了归属工业α烯烃中异构体的核磁共振碳谱的“三步法”,即按强度把各谱峰归属给各组分;按双键碳原子化学位移加和规律归属各组分的不饱和碳原子,初步确定各组分结构;根据双键对饱和碳原子化学位移的取代效应计算烷链碳原子的化学位移,佐证各组分的结构。通过对4种工业α烯烃样品C=10,C=12,C=16和C=24的组成和各组分结构的测定实例说明该方法可行。
Due to the lack of standard materials of α-olefins, it was especially difficult to identify isomers in commercial α-olefins stream. With quantitative ~13C-NMR spectroscopy analysis, it was observed that the change of peak intensity, the change of chemical shifts of unsaturated carbon atoms and saturated carbon atoms in the samples could be used to estimate the composition of isomers in α-olefin mixture. A three-step method was proposed for determining the structure of α-olefin’s isomers from commercial samples with NMR results. The method was applied to determine the composition and structure of four commercial α-olefin samples: C_10-olefins, C_12-olefins, C_16-olefins and C_24-olefins, and the predicted compositions have been quantitated by GC analysis.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2005年第5期51-56,共6页
Petroleum Processing and Petrochemicals
