Toluene extraction of dinitrotoluene wash water
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United States of America Patent
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Jan 14, 2003
Grant Date -
N/A
app pub date -
Feb 7, 2002
filing date -
Feb 7, 2002
priority date (Note) -
Expired
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Abstract
This invention relates to an improvement in a process for the production of dinitrotoluene and particularly to the recovery of dinitrotoluene and organic by-products from the wastewater and wash waters generated in the process. Wastewater and wash water streams contaminated with residual levels of mononitrotoluene, dinitrotoluene, and organic by-products, formed in the purification process, are contacted with toluene. An organic phase and an aqueous phase are generated. The phases are separated and the dinitrotoluene recovered from the organic phase.
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