Capillary gas chromatography/mass spectrometric determination of nitrogen aromatic compounds in complex mixtures

Abstract

Capillary GC separation of nitrogen-containing aromatics has been accomplished with deactivated glass columns. Highprecision retention measurements of pyridine and quinoline derivatives are reported, utilizing parent aza-arenes as retention standards. As shown on the example of GC/MS analysis of aromatic bases extracted from the recycle oil of solvent-refined coal, both precisely measured retention data and mass spectral information combined can lead to positive identification.

Platinum‐Catalyzed Intermolecular Hydroamination of Alkenes: Halide‐Anion‐Promoted Catalysis

“…The other regioisomer (anti-Markovnikov-type), N-(n-hexyl)aniline (13), formed in much lower amounts (12/13 ≈ 95:5). [56] Other side-products were identified as 2-propylquinoline (14, trace amounts) [57] and N-(2-hexenyl)aniline (15). (10) As expected, the reaction conducted in nBu 4 PBr was more efficient (10 cycles) than that conducted in thf (Ͻ1 cycle, control experiments).…”

Structural analysis of extracts from spent hydroprocessing catalysts

“…The nitrogen compounds usually amount to less than 0.5 wt % in crude petroleum and 1-2% in shale oil and coal-derived liquids (Burchill et al, 1982; Novotny et al, 1980) . The high molecular weight (mw) compounds consist mainly of the diand polynuclear aza arenes.…”

Polynuclear azaarenes in wood preservative wastewater

“…The occurrence of polynuclear azaarenes in coal tar has been known since the early 1800s (11). They have been identified more recently in both natural and synthetic crudes (12-15) and subsequently derived distillates and oils (16)(17)(18)(19). In petroleum oils, the total fraction of basic organic nitrogen has been estimated to range from ~0.2 to 0.5% (15).…”