Title:
ニトロ化用の酸でトルエンをニトロ化してジニトロトルエンを製造する工程からでるプロセス排水中のジニトロトルエンを蒸留的に除去する方法
Document Type and Number:
Japanese Patent JP4901883
Kind Code:
B2
Abstract:
A process is proposed for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating toluene with nitrating acid, which comprises basifying the process wastewater to a pH of >8.5, feeding it to a stripping column in the upper region thereof and stripping it with steam in countercurrent to obtain a vapor stream laden with dinitrotoluene and a bottom stream depleted in dinitrotoluene compared to the process wastewater used.
Inventors:
Penzell, Ulrich
Fritz, Rudiger
Alarto, Holger
Adam, Johannes
Melten, Anne-Katlin
Fritz, Rudiger
Alarto, Holger
Adam, Johannes
Melten, Anne-Katlin
Application Number:
JP2008557742A
Publication Date:
March 21, 2012
Filing Date:
March 06, 2007
Export Citation:
Assignee:
BASF SE
International Classes:
C02F1/04; B01D3/14; C07C201/06; C07C201/16; C07C205/06
Domestic Patent References:
| JP2005021890A | ||||
| JP2005296949A |
Other References:
化学大辞典4 縮刷版,共立出版株式会社,1974年 3月10日,縮刷版第16刷,386
Attorney, Agent or Firm:
Satoshi Eto