吐哈柴油石蜡结构特点的波谱分析

采用尿素络合法分离出吐哈柴油中的石蜡。用气相色谱-质谱(GC/MS)联用技术、核磁共振波谱法(1H-NMR)对石蜡进行了定性、定量分析。结果显示气-质联用技术对蜡样进行了有效的分离,共分离出27个组分,全部为饱和烷烃,其中正构烷烃组分占95%以上。利用核磁共振波谱技术对蜡样进行测试,选用平均结构参数表征了正构烷烃的结构特点,计算出了平均碳链长度。结果显示,吐哈柴油具有典型的石蜡基原油特征。

Structural Characteristics of Wax in Diesel of Tuha by Spectra

Wax in diesel of Tuha 0~# was determined by urea adduction.The constitute and contents of wax were explored by gas chromatography-mass spectrometry(GC/MS) and ~1H nuclear magnetic resonance(~1H-NMR).The constitute of the wax is separated successfully from each other.Twenty-seven compounds are identified and their relative intensities are confirmed,all of them are saturated hydrocarbons,which including over 95% n-paraffin and C_(11)-C_(19) contents over 76%.Average carbon number of n-paraffin was calculated through ~1H-NMR.The average carbon number is 15.95 and typical characteristic of crude oil of wax is in the diesel.