Process for producing acid anhydrides

Details Process for producing acid anhydrides Process for producing acid anhydrides

1993-07-07

2000-01-25

Dentz, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549233, 549239, 549245, 549247, 549262, C07D30500

Patent

active

060180579

ABSTRACT:
A process for producing anhydrides by passing a solution of the acid, preferably an organic polyacid, which is to undergo anhydridation over an acidified clay and a process for producing the catalysts therefor.

REFERENCES:
patent: 2981697 (1961-04-01), Mickelson et al.
patent: 3704329 (1972-11-01), Rindtorff et al.
McCabe et al., Clay-and Zeolite-catalysed Cyclic Anhydride Formation, 356 J.Chem.Research (S), 1985 pp. 356-357.
Franz et al., Katalysatoren auf der Basis saureaktivierter Bentonite, Erdol und Kohle, 12 Jahrg./Mai 1959, Nr. 5, pp. 335-339.
Gunther, Chem. Abs. vol. 55, 25 234b (1961).
Notification from European Patent Office, Feb. 4, 1991 with attached Rapport De Recherche Europeenne, EP 88 40 2809.
Cram and Hammond, Organic Chemistry, McGraw-Hill, pp. 310-311 (1959).

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