Rhodium recovery process
AssigneeUnion Carbide Corporation
InventorsRocco A. Fiato, Jose' L. Vidal
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Abstract
A particular process is provided for the recovery of rhodium values from liquid compositions. The process comprises contacting a solubilized rhodium complex with water, a crown ether and an alkaline cesium salt in the liquid phase such that a solid comprising rhodium is formed. The process is applied with particular advantage to the recovery of solubilized rhodium values derived from processes for the production of polyhydric alcohols such as ethylene glycol, and monohydric alcohols such as methanol, by the reaction of carbon monoxide and hydrogen in the presence of rhodium carbonyl complex catalysts in a homogeneous liquid medium. The invention also concerns cesium/crown ether salts of anionic rhodium complexes.
Claims21
The process for the recovery of rhodium values which comprises contacting a rhodium complex with a crown ether, an alkaline cesium salt and water in a liquid phase such that a rhodium-containing solid is formed.
The process for the recovery of rhodium values which comprises introducing a liquid composition containing a solubilized rhodium carbonyl complex to an aqueous liquid phase reaction mixture and contacting said rhodium carbonyl complex in said aqueous liquid phase with an alkaline cesium salt and a crown ether such that a solid comprising a salt of an anionic rhodium carbonyl complex is formed.
Cesium/crown ether salts of anionic rhodium carbonyl complexes.
Cesium/18-crown-6 salts of anionic rhodium carbonyl complexes.
The cesium/18-crown-6 salt of an anionic rhodium sulfido carbonyl cluster.
Dependencies are inferred from the claim text.