JPS5459236A - Stabilization of aromatic diamine - Google Patents

Stabilization of aromatic diamine

Info

Publication number
JPS5459236A
JPS5459236A JP12186877A JP12186877A JPS5459236A JP S5459236 A JPS5459236 A JP S5459236A JP 12186877 A JP12186877 A JP 12186877A JP 12186877 A JP12186877 A JP 12186877A JP S5459236 A JPS5459236 A JP S5459236A
Authority
JP
Japan
Prior art keywords
aromatic diamine
nitrite
phenylenediamine
stabilization
aromatic
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.)
Granted
Application number
JP12186877A
Other languages
Japanese (ja)
Other versions
JPS578095B2 (en
Inventor
Michiaki Oshio
Yukihiro Tsutsumi
Mitsuo Kikuchi
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.)
Tosoh Corp
Original Assignee
Toyo Soda Manufacturing Co Ltd
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 Toyo Soda Manufacturing Co Ltd filed Critical Toyo Soda Manufacturing Co Ltd
Priority to JP12186877A priority Critical patent/JPS5459236A/en
Publication of JPS5459236A publication Critical patent/JPS5459236A/en
Publication of JPS578095B2 publication Critical patent/JPS578095B2/ja
Granted legal-status Critical Current

Links

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To stabilize an aromatic diamine, by the presence of a nitrite as a stabilizer in a system containing an aromatic diamine, e.g. phenylenediamine, etc., and, preferably nitrogen monoxide.
CONSTITUTION: A system (A), e.g. a melt, aqueous solytion of p-phenylenediamine, etc., containing an aromatic diamine, is stabilized by the presence of 1ppmW 5wt.% based on the aromatic diamine of a nitrite, e.g. sodium nitrite, etc., preferably at pH≥7 after the addition of the nitrite. The addition of nitrogen monoxide together with the nitrite further improves the stabilizing effect. The system (A) is preferably a reaction mixture obtained by ammoniation of an aromatic dihalide in the presence of a copper compound catalyst.
EFFECT: More effective for the system cantaining large amounts of impurities
COPYRIGHT: (C)1979,JPO&Japio
JP12186877A 1977-10-13 1977-10-13 Stabilization of aromatic diamine Granted JPS5459236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12186877A JPS5459236A (en) 1977-10-13 1977-10-13 Stabilization of aromatic diamine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12186877A JPS5459236A (en) 1977-10-13 1977-10-13 Stabilization of aromatic diamine

Publications (2)

Publication Number Publication Date
JPS5459236A true JPS5459236A (en) 1979-05-12
JPS578095B2 JPS578095B2 (en) 1982-02-15

Family

ID=14821908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12186877A Granted JPS5459236A (en) 1977-10-13 1977-10-13 Stabilization of aromatic diamine

Country Status (1)

Country Link
JP (1) JPS5459236A (en)

Also Published As

Publication number Publication date
JPS578095B2 (en) 1982-02-15

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