Exxon Research and Engineering Company

Michael Y Wen

Stephen M Davis

Claude C Culross

Peter S Maa

Steve J Hsia

Leonid A Zekel

Georgui S Golovin

Andrew Sullivan

Mikhail Ja Shpirt

Steve C LeViness

The invention relates to a process for recovering the transition metal component of catalysts used in the hydroconversion of heavy hydrocarbonaceous materials. In accordance with the invention, a slurry of a transition metal catalyst and hydrocarbon is catalytically desulfurized resulting in a desulfurized product and a solid residue containing the transition metal. The transition metal may be recovered by coking the residue and then dividing the coker residue into two portions are combusted with the flue dust from the first combustion zone being conducted to the second combustion zone. The flue dust from the second combustion zone is treated with ammonia and ammonium carbonate in order to obtain ammonium molybdate.

Recovery of the transition metal component of catalyst used in heavy

A process for the conversion of solid carbonaceous materials, such as coal, to liquid products using one or more polyoxoanions selected from those represented by:

Conversion of solid carbonaceous material using polyoxoanions

The present invention relates to a catalytic process for converting a solid carbonaceous material, such as coal, to a liquid product in the presence of hydrogen. More particularly, this invention relates to a coal liquefaction process wherein a mixture of coal, bottoms, solvent and a sulfiding agent is subjected to liquefaction conditions in the presence of a catalyst precursor. This catalyst or catalyst precursor is comprised of a thermally decomposable compound of Groups IIB, IVB, VB, VIB, VIIB, and VIII of the Periodic Table of the Elements such as molybdenum.

Liquefaction process

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Baton Rouge, LA, United States of America

Michael Y Wen