STRUCTURAL CHARACTERIZATION OF GUDAO ASPHALTENE BY RUTHENIUM ION CATALYZED OXIDATION

摘要

Structural characterization of Gudao asphaltene was undertaken by using ruthenium ion catalyzed oxidation (RICO) which is capable of converting aromatic carbons selectively to carbon dioxide and/or carboxylic groups while leaving aliphatic and alicyclic structures essentially unaffected. The oxidation products were dominated by a homologous series of straight chain monocarboxylic acids (C_2- C_35) indicating that normal alkyl chains are important constituents of the asphaltene. A series of α, ω-dicarboxylic acids (C_4～C_26) were also detected and determined, confirming the presence of polymethylene moieties linking two aromatic units.