Isolation and Identification of Fatty Acid Amides from Shengli Coal

Shengli coal, a Chinese brown coal, was extracted with carbon disulfide and the extract was gradiently eluted with <i>n</i>-hexane and ethyl acetate (EA)/<i>n</i>-hexane mixed solvents with different concentrations of EA in a silica gel-filled column. A series of fatty acid amides, including fourteen alkanaimdes (C₁₅−C₂₈) and three alkenamides (C₁₈ and C₂₂), were isolated from the coal by this method and analyzed with a gas chromatography/mass spectrometry

Ruthenium Ion-Catalyzed Oxidation of Shenfu Coal and Its Residues

Shenfu coal (SFC), its liquefaction residue (R_L), and carbon disulfide (CS₂)/tetrahydrofuran (THF)-inextractable matter (R_E) were subject to ruthenium ion-catalyzed oxidation to understand the differences in structural features among the above three samples. The results suggest that SFC is rich in long-chain arylalkanes and α,ω-diarylalkanes (DAAs) with carbon number of methylene linkage from 2 to 4 and that long-chain arylalkanes and DAAs are reactive toward hydroliquefaction and soluble in a CS₂/THF mixed solvent, whereas highly condensed aromatic species in SFC show poor solubility in the CS₂/THF mixed solvent

Ruthenium Ion-Catalyzed Oxidation of Shenfu Coal and Its Residues

Shenfu coal (SFC), its liquefaction residue (R_L), and carbon disulfide (CS₂)/tetrahydrofuran (THF)-inextractable matter (R_E) were subject to ruthenium ion-catalyzed oxidation to understand the differences in structural features among the above three samples. The results suggest that SFC is rich in long-chain arylalkanes and α,ω-diarylalkanes (DAAs) with carbon number of methylene linkage from 2 to 4 and that long-chain arylalkanes and DAAs are reactive toward hydroliquefaction and soluble in a CS₂/THF mixed solvent, whereas highly condensed aromatic species in SFC show poor solubility in the CS₂/THF mixed solvent