Method of purifying nitrated aromatic compounds from a nitration process
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United States of America Patent
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Dec 18, 2018
Grant Date -
Jun 7, 2018
app pub date -
Jun 12, 2015
filing date -
Jun 12, 2015
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Abstract
A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.
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