000			01728nab a2200205 4500
005			20260520000817.0
008			260224s2009 xxu
245	0	0	_aAlkyl side chains connected to aromatic units in dagang vacuum residue and its supercritical fluid extraction and fractions (SFEFs)
260			_a _b _cene. 2009
270			_a15/05/2009 ; 17/04/2009
300			_a11 p. ; 374-385
520			_aTranscripción del resúmen publicado por el autor: Dagang vacuum residue (VR) was separated into 16 extractable fractions and a non-extractable end cut by the supercritical fluid extraction and fraction (SFEF) technique. The average molecular structures of the VR and selected SFEFs were determined. The VR and SFEFs were further separated into saturate, aromatic, resin, and asphaltene (SARA) subfractions. Aromatic, resin, and asphaltene subfraction were subjected to ruthenium-ion-catalyzed oxidation (RICO). A homologous series of n-alkanoic acids and a, -di-n-alkanoic acids have been detected and measured in the reaction product after esterification with diazomethane or phenacyl bromide. Concentrations of n-alkanoic acids (C1-C33) were determined, which indicated the content distribution of n-alkyl side chains attached on aromatic carbon. Those a, -di-n-alkanoic acids (C4-C26) represented polymethylene bridges, connecting two aromatic units in the sample. This information was unavailable in average molecular structure analysis.
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aGang Zhang, Zhan _940935
100	1		_aGuo, Shaohui _940936
100	1		_aZhao, Suoqi _926203
999			_c169594 _d169594
856			_uhttp://pubs.acs.org/doi/full/10.1021/ef8006883