Generation of reduced pressure in apparatuses in the...

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

C - Chemistry, Metallurgy

07

D

260/364.5

C07D 307/60 (2006.01) B01J 3/00 (2006.01) C07C 51/265 (2006.01) C07C 51/31 (2006.01) C07D 307/89 (2006.01)

Patent

CA 1235131

- 5 - Abstract of the Disclosure: In apparatuses for the pre- paration 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.

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