JPS56154442A - Recovery of 2,2'-dimethyl-4-hydroxydiphenylamine, on production of 4-amino-3-methylphenol - Google Patents

Recovery of 2,2'-dimethyl-4-hydroxydiphenylamine, on production of 4-amino-3-methylphenol

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Publication number
JPS56154442A
JPS56154442A JP4656181A JP4656181A JPS56154442A JP S56154442 A JPS56154442 A JP S56154442A JP 4656181 A JP4656181 A JP 4656181A JP 4656181 A JP4656181 A JP 4656181A JP S56154442 A JPS56154442 A JP S56154442A
Authority
JP
Japan
Prior art keywords
organic layer
hydroxydiphenylamine
methylphenol
amino
sulfuric acid
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
JP4656181A
Other languages
Japanese (ja)
Inventor
Akihiro Tamaoki
Teruyuki Nagata
Nobuyuki Kajimoto
Masaru Wada
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 JP4656181A priority Critical patent/JPS56154442A/en
Publication of JPS56154442A publication Critical patent/JPS56154442A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE: o-Nitrotoluene is reduced with hydrogen in the presence of a noble metal catalyst and dilute sulfuric acid and the reaction is stopped while the organic layer keeps fluidized state, then the organic layer is extracted with a basic aqueous solution to recover a by-product of amine used in dye production and produce the titled compound in high yield.
CONSTITUTION: When o-nitrotoluene is brought into contact with molecular hydrogen in the presence of a noble metal catalyst such as platinum catalyst and dilute sulfuric acid at 50W120°C to produce 4-amino-3-methylphenol, the hydrogenation reaction is stopped while the organic layer keeps sufficient fluidity and the reaction mixture is separated into the dilute sulfuric acid layer and the organic layer. Then, 2,2'-diemthyl-4-hydroxydiphenylamine is extracted from the organic layer with a basic aqueous solution, whereby 2,2'-diemethyl-4-hydroxydiphenylamine is obtained, when 4-amino-3-methylphenol is produced.
COPYRIGHT: (C)1981,JPO&Japio
JP4656181A 1981-03-31 1981-03-31 Recovery of 2,2'-dimethyl-4-hydroxydiphenylamine, on production of 4-amino-3-methylphenol Pending JPS56154442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4656181A JPS56154442A (en) 1981-03-31 1981-03-31 Recovery of 2,2'-dimethyl-4-hydroxydiphenylamine, on production of 4-amino-3-methylphenol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4656181A JPS56154442A (en) 1981-03-31 1981-03-31 Recovery of 2,2'-dimethyl-4-hydroxydiphenylamine, on production of 4-amino-3-methylphenol

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP55039097 Division

Publications (1)

Publication Number Publication Date
JPS56154442A true JPS56154442A (en) 1981-11-30

Family

ID=12750727

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4656181A Pending JPS56154442A (en) 1981-03-31 1981-03-31 Recovery of 2,2'-dimethyl-4-hydroxydiphenylamine, on production of 4-amino-3-methylphenol

Country Status (1)

Country Link
JP (1) JPS56154442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008214906A (en) * 2007-03-01 2008-09-18 Sekisui House Ltd Anchor bolt restraining implement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008214906A (en) * 2007-03-01 2008-09-18 Sekisui House Ltd Anchor bolt restraining implement

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