摘要
用１３￣Ｃ－ＮＭＲ及ＤＥＰＴ技术，对抚顺老虎台气煤吡啶抽提残煤热解加氢产物中沥青烯段分进行了表征。结果表明：各组分平均分子结构中的芳环并非完全缩聚，而且有亚甲基或联苯型键所连接的小芳香单元。计算得到了各组分的平均分子结构中含有的芳香环数、芳核片数和平均取代度。这些结果对于推断原始媒的大分子结构具有参考价值。
The main objective of the present study is to analyze the structure of as-phaltenes from hydrogenated pyridine-insolubles(PI)of Fushun gas coal. AsphaIteneswere separated into acidic, basic and neutral fraction by ion·exchange resins。 The neutralfraction was further divided into four samples by home-made preparative silica gel chro-matography. The samples were characterized by‘13￣C-NMR combined with DEPT tech-nique to derive average structural parameters. Seven fractions of asphaltenes contain 2.0～9. 0 aromatic rings and 2.2～4.4 aromatic nucleis per average molecule. The degree of alkyl,naphthenic and phenolic substituents bonding to available aromatic clusters is about 37～51%.The analytical method determined the bi-aryl linkages, methylene bridges and naph-thenic rings, and exactly characterized the molecular structure of polycyclic aromatic hydro-carbons.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1995年第4期410-416,共7页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
中国科学院武汉物理所波谱与原子分子物理国家重点实验室基金
