Separation and characterization of asphaltenic subfractions

Quimica nova

González, Gaspar¹  Ferreira, Silas R.²  Lucas, Elizabete F.²  Mansur, Claudia R. E.²  Honse, Siller O.² 

[1] Centro de Pesquisas da PETROBRAS, Rio de Janeiro, Brasil;Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

关键词: crude oil;    asphaltenes;    characterization.;   

DOI  :  10.1590/S0100-40422012001000019

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The structure ofthe various asphaltenic subfractions found in crude oil was evaluated. For thispurpose, C5 asphaltenes were extracted from an asphaltic residue using n-pentaneas the flocculant solvent. The different subfractions were isolated from theC5 asphaltenes by the difference in solubility in different solvents. Thesewere characterized by infrared spectroscopy, nuclear magnetic resonance, X-rayfluorescence, elementary analysis and mass spectrometry. The results confirmedthat the subfractions extracted with higher alkanes had greater aromaticityand molar mass. However, small solubility variations between the subfractionswere attributed mainly to the variation in the concentrations of cyclical hydrocarboncompounds and metals.

【 授权许可】

CC BY