A separation method is described for the identification of organic compounds in synthetic fuel products. Prefractionation of crude synfuel materials into discrete chemical classes was prformed by adsorption column chromatography using small quantities of neutral aluminum oxide and silicic acid. Subsequent high-resolution separation of individual components was achieved by using capillary column gas chromatography, and specific compound types were determined by gas chromatographic retention data and combined gas chromatography-mass spectrometry. The principal chemical classes investigated in a solvent-refined coal liquid were aliphatic hydrocarbons, polycyclic aromatic hydrocarbons, polycyclic aromatic sulfur heterocycles nitrogen polycyclic aromatic compounds, and hydroxyl polycyclic aromatic hydrocarbons. The nitrogen-containing aromatic compounds were further separated into secondary nitrogen polycyclic aromatic heterocycles, amino polycyclic aromatic hydrocarbons, and tertiary nitrogen polycyclic aromatic heterocycles to facilitate their identification.

Chemical class separation and characterization of organic compounds in synthetic fuels

Hydrodeoxygenation (HDO) reactions occur simultaneously with hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) during catalytic hydrotreatment of liquid fuels. Extensive research activities in the areas of HDS and HDN have been dictated by environmental concern to limit SO2 and NOX emissions. Different aspects of catalytic HDN and HDS have been reviewed frequently, most recently by Katzer and Sivasubramanian [1] and Furimsky [2], respectively. HDO has not attracted as much attention. This may be attributed to the very low amounts of oxygen found in conventional crudes, the main source of commercial fuels. Also, during HDO, the O is removed in an environmentally harmfulness form.

Chemistry of Catalytic Hydrodeoxygenation

Separation of the energetic and geometric contributions to the aromaticity. Part IV. A general model for the π-electron systems

Pyridines carrying heterosubstituents (such as carboxy, amido, amino, alkoxy or trifluoromethyl groups or solely individual halogen atoms) can be readily and site selectively metalated. Subsequent reaction with a suitable electrophile opens rational access to a wealth of new building blocks for the synthesis of biologically active compounds. This approach relies on organometallic methods, which are both efficacious and extremely flexible as far as the substitution site and the product structure are concerned (86 references).

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William W. Paudler

Papers

Nitrogen bases in solvent-refined coal

Mechanism of the reaction of 2-haloketones with 2-aminopyridine

1,2,4‐Triazincs XIII. The bond lengths and bond angles of a 1,2,4‐triazine

Some formylation reactions of imidazo[1,5-a] pyridine and pyrrocoline

1,2,4-Triazines. XII. Syntheses of 5-carboxarnido-1,2,4-triazines via an addition-oxidation reaction