Exxon Research and Engineering Company

Charles Rebick

Richard Kenneth Lyon

William J Metrailer

Robert L Seiver

Harold N Weinberg

Duane A Goetsch

Kenneth O McElrath

A fluid coking process is provided in which a stream of heavy oil product, which typically is recycled to the coking zone, is first subjected to solvent separation to separate it into a high Conradson carbon product and a lower Conradson carbon product and, thereafter, at least a portion of the lower Conradson carbon product is recovered and the high Conradson carbon product is recycled to the coking zone.

Fluid coking with solvent separation of recycle oil

A process for selectively removing nitrogen from petroleum distillate feedstocks, notably lube oil distillates or lube base stocks without significant desulfurization of said petroleum distillate feedstocks, especially lube oil distillates or lube base stocks, while hydrotreating the oil to improve odor, color, improve stability, and the like. In accordance therewith, a supported, non (metal-promoted) carbon-containing molybdenum sulfide HDN/HDS selective hydrotreating catalyst is formed from a precursor composite made by compositing a preselected quantity of a porous, refractory inorganic oxide with a complex salt characterized by the formula B.sub.x [MoO.sub.y S.sub.4-y ] where B is (a) an alkyl substituted diammonium ion, or (2) an alkyl substituted ammonium ion or quaternary ammonium ion; x is 1 where B is an alkyl substituted diammonium ion, or 2 where B is an alkyl substituted ammonium or quaternary ammonium ion; and y is 0, or a fraction or whole number ranging up to 3. The supported, non (metal-promoted) carbon-containing molybdenum sulfide HDN/HDS selective lube oil hydrotreating catalyst is then formed from the precursor composite by heating said composite, and heat decomposing the salt of said catalyst precursor composite in the presence of hydrogen, hydrocarbon and sulfur.

Supported, non (metal-promoted) carbon-containing molybdenum sulfide

A fluid coking process is provided in which a relatively large amount of hydrogen sulfide is added to the coker fluidizing gas. A preferred fluidizing gas is a mixture of hydrogen and hydrogen sulfide.

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Annandale, NJ, United States of America

Charles Rebick