Invention Grant
US07449610B2 Method for extracting nitrocresols from waste water produced in the manufacture of mononitrotoluene and use of said extract
有权
用于在制造单硝基甲苯中生产的废水中提取硝基甲酚的方法和所述提取物的使用
- Patent Title: Method for extracting nitrocresols from waste water produced in the manufacture of mononitrotoluene and use of said extract
- Patent Title (中): 用于在制造单硝基甲苯中生产的废水中提取硝基甲酚的方法和所述提取物的使用
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Application No.: US10573020Application Date: 2004-09-18
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Publication No.: US07449610B2Publication Date: 2008-11-11
- Inventor: Johannes Buettner , Holger Allardt , Reinhard Tonder , Reiner Reetz , Michael Reichelt
- Applicant: Johannes Buettner , Holger Allardt , Reinhard Tonder , Reiner Reetz , Michael Reichelt
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Connolly Bove Lodge & Hutz LLP
- Priority: DE10345601 20030929
- International Application: PCT/EP2004/010497 WO 20040918
- International Announcement: WO2005/037766 WO 20050428
- Main IPC: C07C205/06
- IPC: C07C205/06 ; C02F1/26
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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