PREVENTION OF PRECIPITATION FROM NITRATED AROMATIC CRUDE PRODUCTS

PREVENTION OF PRECIPITATION FROM NITRATED AROMATIC CRUDE PRODUCTS

Precipitation of nitrohydroxyaromatic salts from the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, is prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are p...

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Bibliographische Detailangaben
Hauptverfasser: FRITZ, RÜDIGER, ZÖLLINGER, MICHAEL, REETZ, REINER, BÜTTNER, JOHANNES, RAICHLE, ANDREAS, HAASE, STEFANIE, ALLARDT, HOLGER
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:Precipitation of nitrohydroxyaromatic salts from the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, is prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are preferably selected from a feed to a distillation column, a bottoms circulation stream of a distillation column and a feed to an evaporator.