Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Platinum group metal
Patent
1981-03-06
1982-07-20
Carter, Herbert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Platinum group metal
252413, 252414, 252415, 260546, 260549, C01G 5500
Patent
active
043405690
ABSTRACT:
Residues are formed in the carbonylation of esters or ethers, particularly in the production of acetic anhydride or ethylidene diacetate. When such residues contain noble metal, typically rhodium, used as a catalyst, the noble metals must be recovered before the residues can be disposed of. The metal values are freed from the residues by treatment with amines, thereby enabling the rhodium to be extracted by subsequent contact with an aqueous halogen acid. The residues are pretreated with alkanols and concentrated by evaporation to improve the effect of such amine treatments.
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Davidson Walter C.
Porcelli Richard V.
Carter Herbert T.
Long William C.
Stewart Riggs T.
The Halcon SD Group, Inc.
Wells Harold N.
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