【摘要】：以石蠟基屬催化裂化油漿——長慶油漿為研究對象,采用高真空釜式蒸餾按沸點將其切割成7個窄餾分,采用常規(guī)分析方法結(jié)合正離子甲酸銨電噴霧-傅里葉變換離子回旋質(zhì)譜(ESI FT-ICR MS)、核磁共振氫譜(1 H-NMR)和紅外光譜(FT-IR),得到長慶油漿窄餾分性質(zhì)及結(jié)構(gòu)隨沸點變化的規(guī)律。結(jié)果表明,隨餾分沸點升高,長慶油漿窄餾分的密度和折光率先增大后減小,氫/碳原子比先減小后增大,出現(xiàn)了與原油不一樣的變化趨勢,而其殘?zhí)�、平均相對分子質(zhì)量和運動黏度則逐漸增大。此外,以500℃為分界點,飽和分含量先減小后增大,芳香分先增大后減小。油漿窄餾分中含有相當(dāng)數(shù)量的烷烴結(jié)構(gòu),芳碳率fA隨餾分沸點升高先增大后減小,烷基碳率fP的變化趨勢則相反。長慶油漿各窄餾分中主要含3~5環(huán)芳烴,低于500℃餾分,隨餾分沸點上升,芳環(huán)數(shù)不斷增加,縮合程度提高;500℃以上餾分的芳環(huán)保持在5個左右,出現(xiàn)環(huán)烷環(huán)數(shù)的增加和側(cè)鏈的變長。
[Abstract]:The paraffin-based FCC slurry-Changqing slurry was cut into seven narrow fractions by high vacuum tank distillation at boiling point. Conventional analytical methods were combined with cationic ammonium formate electrospray Fourier transform ion cyclotron mass spectrometry (ESI FT-ICR MS), nuclear magnetic resonance hydrogen spectroscopy (1 H-NMR) and infrared spectroscopy (FT-IR). The variation of properties and structure of narrow fractions of Changqing slurry with boiling point was obtained. The results show that with the increase of boiling point, the density and refraction of narrow fractions of Changqing slurry increase at first and then decrease, and the ratio of hydrogen to carbon atom decreases first and then increases, and the change trend is different from that of crude oil, but the residual carbon of Changqing slurry is different from that of crude oil. The average relative molecular weight and kinematic viscosity increased gradually. In addition, when 500 鈩，

本文編號：2447988