Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Patent
1997-04-01
1999-10-12
Lewis, Michael
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
502 20, 502 24, 502 29, 558270, 558274, B01J 3852, B01J 3850, B01J 2034, C07C 6996
Patent
active
059654724
ABSTRACT:
Catalyst systems with a content of a platinum-group-metal catalyst, a co-catalyst, a quaternary salt and a base for the oxidative carbonylation of aromatic hydroxy compounds to the corresponding diaryl carbonates are according to the invention obtained as a mother liquor by suspension crystallization and can be returned into the carbonylation reaction or worked up to valuable materials. The crystallizate, which consists predominantly of diaryl carbonate and the parent aromatic hydroxy compound, is worked up to pure diaryl carbonate and pure hydroxy compound.
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patent: 5312955 (1994-05-01), Pressman et al.
patent: 5495038 (1996-02-01), Buysch et al.
Orbit Abstract of EP 0 687 666 (Dec. 20, 1995).
Ullman's Encyclopedia of Industrial Chemistry, vol. B-2, Unit Operations I, Chapter 25: Stirring, pp. 25-1 through 25-6 (1988). no month.
Chem.-Ing.-Tech.57, Nr. 2, pp. 91-95 (1985). no month.
Buysch Hans-Josef
Hesse Carsten
Rechner Johann
Wirges Hans-Peter
Bayer AG
Ghyka Alexander G.
Lewis Michael
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