Preparation of phthalic anhydride

Details Preparation of phthalic anhydride Preparation of phthalic anhydride

1981-10-20

1983-01-18

Raymond, Richard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549249, C07D30789

Patent

active

043693270

ABSTRACT:
A process for the preparation of phthalic anhydride (PA) of catalytic oxidation of naphthalene or o-xylene with air, a preheated mixture of air and naphthalene or o-xylene being passed into a reactor charged with the catalyst, and the reaction gas leaving the reactor being passed through a separator in which the PA is separated out as a solid, in which process the air fed to the reactor is preheated, before or after the admixture of naphthalene or of o-xylene, by using it to cool the reaction gas in the PA separator.

REFERENCES:
patent: 3248453 (1966-04-01), Beyrard
patent: 3535345 (1970-10-01), Egbert
patent: 3869479 (1975-03-01), Barth et al.
patent: 4119645 (1978-10-01), Auroy et al.
patent: 4169098 (1979-09-01), Hellmer et al.
patent: 4252772 (1981-02-01), Way
patent: 4269776 (1981-05-01), Keunecke et al.

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