Process for recovery of catalyst from polymerization of polyphen

Details Process for recovery of catalyst from polymerization of polyphen Process for recovery of catalyst from polymerization of polyphen

1976-12-13

1978-01-31

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6544, C08G 6545

Patent

active

040715000

ABSTRACT:
A process for the recovery of copper catalyst from the polymerization of polyphenylene ethers comprises forming a complex of the catalyst and an amino acid chelating agent, separating the complex from the polymerization mixture, contacting the complex with a reducing sugar in an alkaline medium to precipitate the copper as an oxide and, optionally, acidifying the alkaline medium to precipitate and recover the amino acid chelating agent.

REFERENCES:
patent: 3733301 (1973-05-01), Modan
patent: 3838102 (1974-09-01), Bennett et al.
patent: 3951917 (1976-04-01), Floryan et al.

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