Method for extracting nitrocresols from waste water produced...

Details Method for extracting nitrocresols from waste water produced... Method for extracting nitrocresols from waste water produced...

2004-09-18

2008-11-11

Eyler, Yvonne (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S932000

Reexamination Certificate

active

07449610

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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International Search Report No. PCT/EP2004/010497 dated Jan. 21, 2005, 4 pages.

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