Generation of reduced pressure in apparatuses in the preparation

Details Generation of reduced pressure in apparatuses in the preparation Generation of reduced pressure in apparatuses in the preparation

1985-09-11

1987-06-23

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549257, C07D30760, C07D30789

Patent

active

046754202

ABSTRACT:
In apparatuses for the preparation of phthalic anhydride and/or maleic anhydride by catalytic oxidation of naphthalene or o-xylene with air, reduced pressure is generated using liquid-jet pumps, and wash liquid is removed from the exit gas washer as a pump fluid for the liquid-jet pumps and is subsequently recycled to the exit gas washer.

REFERENCES:
patent: 4269776 (1981-05-01), Keunecke et al.

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