title: Subfractionation, characterization and photooxidation of crude oil resins.
abstract: Resins of five crude oils were obtained using SARA fractionation. The maltenic fraction of Blend Arabian Light, was further separated into six polar fractions. These fractions which are the constituents of the resins were analysed by FTIR spectroscopy. They appeared to be more oxidized, more aliphatic and less aromatic than asphaltenes. Photooxidation of resins showed that they are easily oxidizable and much more influenced by photooxidation than asphaltenes. The principal effect of photooxidation are: (i) increase of carbonyl group amounts and particularly formation of carboxylic groups, (ii) oxidation of sulfoxide in sulfone group, (iii) oxidation of alkyl chains and of aromatic rings (quinone structures).
authors: Laboratoire de Chimie Organique, Faculté des Sciences Dhar El-Mehraz, Fes, Morocco.
authors: A
authors: A
authors: Boukir
authors: E
authors: E
authors: Aries
authors: M
authors: M
authors: Guiliano
authors: L
authors: L
authors: Asia
authors: P
authors: P
authors: Doumenq
authors: G
authors: G
authors: Mille
mesh_terms: D005591:Chemical Fractionation / Q000379:methods; D006841:Hydrocarbons, Aromatic / Q000032:analysis*; D008027:Light; D010084:Oxidation-Reduction / Q000528:radiation effects; D010578:Petroleum / Q000032:analysis*; D012116:Resins, Plant / Q000032:analysis* / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation
chemical_list: D006841:Hydrocarbons, Aromatic; D010578:Petroleum; D012116:Resins, Plant