Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Platinum group metal
Patent
1981-03-06
1982-07-27
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
043417418
ABSTRACT:
Residues are formed in the carbonylation of esters or ethers, particularly in the production of acetic anhydride or ethylidene diacetate. Such residues contain noble metal, typically rhodium, used as a catalyst, which must be recovered before the residues can be disposed of. The rhodium values are freed from the residues by treatment with amines, preferably primary aliphatic amines and/or hydrazine, thereby enabling the rhodium to be extracted by subsequent contact with an aqueous halogen acid.
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Davidson Walter C.
Fieselmann Benjamin F.
Carter Herbert T.
Long William C.
Stewart Riggs T.
The Halcon SD Group, Inc.
Wells Harold N.
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