石油炼制与化工 ›› 2017, Vol. 48 ›› Issue (2): 107-113.

• 分析与评定 • 上一篇    

风城稠油中石油酸组成结构分析

杨敬一1,何萧1,蔡海军2,徐心茹1   

  1. 1. 华东理工大学化工学院
    2. 中国石油乌鲁木齐石化公司
  • 收稿日期:2016-07-11 修回日期:2016-09-20 出版日期:2017-02-12 发布日期:2017-01-17
  • 通讯作者: 杨敬一 E-mail:jyyang@ecust.edu.cn
  • 基金资助:
    国家自然科学基金资助项目

COMPOSITIONS AND STRUCTURES OF PETROLEUM ACIDS IN FENGCHENG HEAVY CRUDE

    

  1.  
  • Received:2016-07-11 Revised:2016-09-20 Online:2017-02-12 Published:2017-01-17
  • Supported by:
     

摘要: 通过氢氧化钾-乙醇水溶液分离风城稠油中的石油酸,采用元素分析、红外光谱、核磁共振波谱、电喷雾质谱、紫外和荧光色谱等方法分析石油酸的结构组成。实验结果表明,风城稠油所含石油酸主要是一元羧酸二聚体,平均分子量为665,平均分子式为C43.51H78.47O3.78,氢碳比为1.80。风城稠油中石油酸组成以环烷酸为主占79.84%,脂肪酸占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较平均,在11.00%~18.88%之间,其中四环环烷酸/芳环羧酸含量稍高。石油酸中还含有微量3~4环的芳香结构物质。

关键词: 石油酸, 环烷酸, 红外光谱, 电喷雾质谱, 核磁共振, 稠油

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.

Key words: petroleum acid, naphthenic acid, IR, ESI-MS, NMR, viscous crude

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