风城稠油中石油酸组成结构分析 |
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引用本文: | 杨敬一 何萧 蔡海军 徐心茹. 风城稠油中石油酸组成结构分析[J]. 石油炼制与化工, 2017, 48(2): 107-113 |
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作者姓名: | 杨敬一 何萧 蔡海军 徐心茹 |
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作者单位: | 1. 华东理工大学化工学院;2. 中国石油乌鲁木齐石化公司; |
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基金项目: | 国家自然科学基金资助项目 |
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摘 要: | 由氢氧化钾-乙醇水溶液分离风城稠油中的石油酸,结合元素分析、红外光谱(FT-IR)、核磁共振(NMR)、电喷雾质谱(ESI-MS)、紫外光谱(UV-Vis)和荧光色谱等方法分析其结构组成。结果表明:风城稠油所含石油酸主要是一元羧酸二聚体,平均相对分子质量为665,平均分子式为C43.51H78.47O3.78,氢碳原子比为1.80;各类酸分布范围较广,其中,环烷酸含量最高,占79.84%,脂肪酸次之,占20.16%;环烷酸中一环环烷酸、二环环烷酸、三环环烷酸、四环环烷酸/芳环羧酸、五环环烷酸/芳环并一环羧酸和六环环烷酸/芳环并二环羧酸的含量相当,均在11.00%~18.88%之间。此外,还检测到微量3~4环的芳香结构物质。
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关 键 词: | 石油酸 环烷酸 红外光谱 电喷雾质谱 核磁共振 稠油 |
收稿时间: | 2016-07-11 |
COMPOSITIONS AND STRUCTURES OF PETROLEUM ACIDS IN FENGCHENG HEAVY CRUDE |
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Abstract: | Petroleum acids in Fengcheng heavy crude were separated by potassium hydroxide-ethanol aqueous solution extraction. The compositions and structures of petroleum acids were determined by elemental analysis, IR, NMR, ESI-MS, UV and Fluorescence Spectrum. The results show that the petroleum acid in Fengcheng heavy crude is mainly composed of dimers of mono-carboxylic acids with an average molecular weight of 665, the empirical formula is C43.51H78.47O3.78 with a hydrogen-carbon mole ratio of 1.80. The contents of naphthenic acids and aliphatic acids occupy 79.84% and 20.16%, respectively. The contents of naphthenic acids with different structures (including 1-3 ring naphthenic acids, 4-ring naphthenic acids/aromatic carboxylic acids, 5-ring naphthenic acids/benzonaphthenic carboxylic acids with one ring, 6-ring naphthenic acids/benzonaphthenic carboxylic acids with 2-ring) are close to each other, ranging from 11.00% to 18.88%. Trace amount of 3-4 ring aromatic in petroleum acids are also observed. |
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Keywords: | petroleum acid naphthenic acid IR ESI-MS NMR viscous crude |
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