초록 ▼

Spent catalysts from hydrocarbon refining processes, comprising transition metal compounds on aluminum oxide-containing supports, are subjected to an oxidative roasting and are treated with sulfuric acid in a counter-current digester to dissolve metals. Following operations to separate compounds of

Spent catalysts from hydrocarbon refining processes, comprising transition metal compounds on aluminum oxide-containing supports, are subjected to an oxidative roasting and are treated with sulfuric acid in a counter-current digester to dissolve metals. Following operations to separate compounds of the various transition metals, a solution containing approximately stoichiometric equivalents of aluminum and sulfate is obtained.

대표청구항 ▼

CM,1. A method for the recovery of valuable components from a particulate catalyst material which contains compounds of metals on a support comprising aluminum oxide, which method comprises: (a) roasting the catalyst in the presence of oxygen; (b) reacting the roasted catalyst with sulfuric acid, in

CM,1. A method for the recovery of valuable components from a particulate catalyst material which contains compounds of metals on a support comprising aluminum oxide, which method comprises: (a) roasting the catalyst in the presence of oxygen; (b) reacting the roasted catalyst with sulfuric acid, in a single counter current digester, to produce a solution comprising aluminum and other metal ions; (c) separating other metals from aluminum; and (d) recovering a solution containing sulfate at approximately 1.5 times the molarity of aluminum.