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
1989-08-04
1990-08-28
McFarlane, Anthony
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 28, B01J 3860, B01J 3862
Patent
active
049525425
ABSTRACT:
Cyclic alkylene carbonates are produced by the homogeneous catalytic reaction of alkylene oxides with carbon dioxide during which process, polyglycols are formed. The catalyst is separated by distillation from the alkylene carbonate and is recycled to the reaction while associated with polyglycols. A purge stream is removed from the recycle to prevent an undue concentration of polyglycols in the reaction and catalyst is separated from the purge stream by acylation of the polyglycols enabling precipitation of the catalyst.
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patent: 4598057 (1986-07-01), Issacs
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patent: 4661463 (1987-04-01), Mocella
patent: 4746640 (1988-05-01), Erpenbach
patent: 4786752 (1988-11-01), Holzhauer
Balmer Norman L.
McFarlane Anthony
Union Carbide Chemicals and Plastics Company Inc.
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