JPS54160324A - Purification of m-dinitrobenzene - Google Patents

Purification of m-dinitrobenzene

Info

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
Application number
JP6675778A
Other languages
Japanese (ja)
Inventor
Shinji Takenaka
Kosuke Yamamoto
Tomohito Koba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP6675778A priority Critical patent/JPS54160324A/en
Publication of JPS54160324A publication Critical patent/JPS54160324A/en
Pending legal-status Critical Current

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
JP6675778A 1978-06-05 1978-06-05 Purification of m-dinitrobenzene Pending JPS54160324A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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