Recovery of noble metal values from carbonylation residues using immiscible liquids
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United States of America Patent
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Aug 12, 1986
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N/A
app pub date -
Aug 26, 1985
filing date -
Aug 26, 1985
priority date (Note) -
Expired
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Abstract
Heavy residues produced by noble metal catalyzed carbonylation reactions and containing Group VIII noble metals, particularly rhodium, are treated with a mixture of immiscible liquids to precipitate solids containing substantially all of the noble metal 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.
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