Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1992-06-17
1993-05-11
Tsang, Cecilia
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549248, 549250, C07D30789
Patent
active
052102238
ABSTRACT:
The present invention is an improvement to the conventional process for the production of phthalic anhydride. In particular, the present invention enables the crude phthalic anhydride product to be recovered in a more efficient manner.
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Chen Michael S.
Cook Philip J.
Gunardson Harold H.
Ulrich Melinda B.
Air Products and Chemicals Inc.
Marsh Willam F.
Simmons James G.
Tsang Cecilia
Wolff Robert J.
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