MODEL-COMPOUND STUDIES ON COAL OIL COPROCESSING CHEMISTRY .1. SULFUR-HYDROGEN COMPOUND INTERACTIONS

Interaction of sulfur model compounds with aliphatic, aromatic and hyd roaromatic hydrocarbons under various conditions mimicking proposed co processing techniques are described. Results suggest that aliphatic th ioether compounds will be much more reactive than aromatic sulfur comp ounds unless an effective hydrogen supply is present to hydrogenate th ese compound types. In the absence of an effective hydrogen source, ph enyl sulfide and benzothiophene underwent retrogressive reactions prod ucing higher molecular weight products containing new aromatic C-C and C-S bonds.