Title:
【発明の名称】トルエンのニトロ化中に得られるジニトロトルエン混合物から硫酸および硝酸を分離する方法
Document Type and Number:
Japanese Patent JP2640956
Kind Code:
B2
Abstract:
Sulphuric and nitric acids present in dinitrotoluene are separated from the dinitrotoluene by adding up to 10 wt. % water (based on quantity of dinitrotoluene) to the mixture of dinitrotoluene, sulphuric acid and nitric acid, mixing and separating the aqueous phase containing nitric and sulphuric acids. The mixtures treated by this process generally contain up to 5 wt. % nitric acid and up to 6 wt. % sulphuric acid.
Inventors:
HARURO UITSUTO
HAIKO BETSUKUHAUSU
HAIKO BETSUKUHAUSU
Application Number:
JP3200188A
Publication Date:
August 13, 1997
Filing Date:
February 16, 1988
Export Citation:
Assignee:
BAIERU AG
International Classes:
C07C67/00; C07C201/00; C07C201/08; C07C201/16; C07C205/06; (IPC1-7): C07C205/06; C07C201/08; C07C201/16
Domestic Patent References:
| JP57203036A |
Attorney, Agent or Firm:
Kawahara Kazuho