| 摘要 |
<p>Heavy residues produced by noble metal catalyzed carbonylation reactions and containing Group VIII noble metals, particularly rhodium, are treated with reagents to precipitate solids containing substantially all of the noble metal contained in the residues. The solids may be further treated to recover the noble metals or they may be returned directly for reuse in the carbonylation reaction. Suitable reagents include alkali metal hydroxides, alkali metal peroxides, alkali metal borohydrides, and other reducing agents, such as formaldehyde and acidified sodium bisulfite.</p> |
