Recovery of rhodium from carbonylation residues using immiscible liquids.

摘要

Heavy residues produced by noble metal catalyzed carbonylation reactions and containing rhodium, are treated with a mixture of immiscible liquids to precipitate solids containing substantially all of the rhodium contained in the residues. The solids may be returned directly for reuse in the carbonylation reaction. One group of liquids consists of water with immiscible alcohols or hydrocarbons, or mixtures thereof. A second group consists of acetic anhydride with immiscible hydrocarbons.