Method for extracting nitrocresols from waste water produced in the manufacture of mononitrotoluene and use of said extract
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United States of America Patent
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Nov 11, 2008
Grant Date -
Feb 22, 2007
app pub date -
Sep 18, 2004
filing date -
Sep 29, 2003
priority date (Note) -
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Abstract
The invention provides a process for removing nitrocresols from wastewater of mononitrotoluene preparation, which comprises acidifying the alkaline wastewater of mononitrotoluene preparation with acids to a pH of at most 3 and treating the nitrocresols with an extractant.The invention further provides the preparation of dinitrotoluene by use of the nitrocresol-containing extracts as a feedstock.
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