Regeneration of metallo-organic catalyst for carbon dioxide-epox

Details Regeneration of metallo-organic catalyst for carbon dioxide-epox Regeneration of metallo-organic catalyst for carbon dioxide-epox

1989-03-31

1990-10-02

Konopka, Paul E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

502 28, 502170, C08G 6362, B01J 2120, B01J 2102

Patent

active

049608622

ABSTRACT:
A process is provided for regenerating metallo-organic catalyst used in copolymerizing carbon dioxide with epoxides to form poly(alkylene carbonates). The catalyst is a polyvalent metal dicarboxylate and the regeneration procedure involves contacting spent or deactivated catalyst with dicarboxylic acid, preferably in a slurry. In one aspect the copolymerization is carried out and catalyst is separated from the polymerization mixture, reactivated with the dicarboxylic acid, such as glutaric or adipic acid, and reused in copolymerization to form poly(alkylene carbonate).

REFERENCES:
patent: 3585168 (1971-06-01), Inoue et al.
patent: 3900424 (1975-08-01), Inoue et al.
patent: 4789727 (1988-12-01), Sun
patent: 4851507 (1989-07-01), Kesling, Jr. et al.
"Organic and Bio-Organic Chemistry of Carbon Dioxide", Inoue and Yamazaki, pp. 167-176, John Wiley & Sons, New York (1982).

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