JPS54160324A - Purification of m-dinitrobenzene - Google Patents
Purification of m-dinitrobenzeneInfo
- Publication number
- JPS54160324A JPS54160324A JP6675778A JP6675778A JPS54160324A JP S54160324 A JPS54160324 A JP S54160324A JP 6675778 A JP6675778 A JP 6675778A JP 6675778 A JP6675778 A JP 6675778A JP S54160324 A JPS54160324 A JP S54160324A
- Authority
- JP
- Japan
- Prior art keywords
- naoh
- dinitrobenzene
- purity
- yield
- dnb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title compound useful as a raw material for m-phenylenediamine in high purity and yield, by adding NaOH to crude m-dinitrobenzene (D) continuously to maintain the initial NaOH concentration, and by heat-treating D with an aqueous NaOH.
CONSTITUTION: NaOH is continuously added to crude m-dinitrobenzene (D) to maintain the concentration of an aqueous NaOH at 9% or less, preferably 4W7%, and the mixture is then heat-treated at 91W100°C, preferably 93W97°C to give high-purity m-dinitrobenzene (m-DNB) in high yield. The m-DNB is readily hydrogenated at a high rate to form high-purity m-phenylenediamine in high yield.
EFFECT: Improved volume efficiency, reduced amounts of unreacted NaOH and waste liquor, and economical.
USE: Raw materials for m-nitroaniline and intermediates for organic synthesis.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6675778A JPS54160324A (en) | 1978-06-05 | 1978-06-05 | Purification of m-dinitrobenzene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6675778A JPS54160324A (en) | 1978-06-05 | 1978-06-05 | Purification of m-dinitrobenzene |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54160324A true JPS54160324A (en) | 1979-12-19 |
Family
ID=13325066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6675778A Pending JPS54160324A (en) | 1978-06-05 | 1978-06-05 | Purification of m-dinitrobenzene |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54160324A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61257950A (en) * | 1985-05-09 | 1986-11-15 | Mitsui Toatsu Chem Inc | Method for purifying meta-dinitro aromatic hydrocarbon |
-
1978
- 1978-06-05 JP JP6675778A patent/JPS54160324A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61257950A (en) * | 1985-05-09 | 1986-11-15 | Mitsui Toatsu Chem Inc | Method for purifying meta-dinitro aromatic hydrocarbon |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54160324A (en) | Purification of m-dinitrobenzene | |
JPS55139375A (en) | Production of hydroxyflavan | |
JPS56135428A (en) | Purification of 1,2-dichlroethane | |
JPS5412307A (en) | Purification of 3-methyl-3-methoxybutanol | |
JPS52102273A (en) | Synthesis of 5-oxo-2-(alpha,alpha-disubstituted benzyloxyethyl)pyrrolidines | |
JPS5340737A (en) | Preparation of cyanophenol | |
JPS5236604A (en) | Preparation of methylchloride and its purification process | |
JPS5352682A (en) | Purification of l-methionase | |
JPS52144649A (en) | Separation and purification of cyclohexene | |
JPS5533416A (en) | Production of hexamethyene bis-dicyandiamide | |
JPS554315A (en) | Purification of 2-butyne | |
JPS53144583A (en) | Preparation of 5-fluoro-6-hydroxy-5,6-dihydrouracilmonohydrate | |
JPS52156846A (en) | Preparation of cyanonorbornene | |
JPS5266684A (en) | Purification and separation of 2-keto-l-glonic acid | |
JPS5359622A (en) | Preparation of saccharic acid salt mixture | |
SU1317890A1 (en) | Method of succinimide synthesis | |
JPS5488220A (en) | Preparation of aminonitrile | |
JPS5519055A (en) | Separation of micophenolic acid | |
JPS57149270A (en) | Preparation of 3,4,5,6,7,8-hexahydrocarbostyril-5-one | |
JPS57149257A (en) | 4-benzyloxyphenylacetamide | |
JPS53147048A (en) | Purification of naphthalene | |
JPS5211193A (en) | Production of crystalline gypsum fiber | |
JPS5520706A (en) | Preparation of metoclopramide | |
JPS54144327A (en) | Separation and purification of styrene oxide | |
JPS56158734A (en) | Preparation of p-n-alkylbenzoic acid |