Process for purifying wastewaters from the workup of crude aromatic nitro compounds

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United States of America Patent

PATENT NO 8697921
APP PUB NO 20130041189A1
SERIAL NO

13569806

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Abstract

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The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the single or multiple performance of the following wash stage (a):

    (a) contacting the crude aromatic nitro compound (N-in) with an aqueous phase (W-res) and then separating the phases to obtain an organic phase (N-res) and an aqueous phase (W-res),wherein at least one demulsifier (D) is present in one or more of the wash stages (a).

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Patent Owner(s)

Patent OwnerAddress
BASF SECARL-BOSCH-STRASSE 38 LUDWIGSHAFEN AM RHEIN 67056

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deckert, Petra Bammental, DE 18 116
Deibel, Stefan Robert Hoeilaart, BE 2 5
Denissen, Leo Brasschaat, BE 6 13
Fankhaenel, Matthias Dackenheim, DE 4 5
Leschinski, Julia Ixelles, BE 11 26
Neto, Samuel Brussels, BE 25 157
Van, De Voorde Bart Antwerpen, BE 4 9

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