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-methylphenolInfo
- 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
Links
Landscapes
- 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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008214906A (en) * | 2007-03-01 | 2008-09-18 | Sekisui House Ltd | Anchor bolt restraining implement |
-
1981
- 1981-03-31 JP JP4656181A patent/JPS56154442A/en active Pending
Cited By (1)
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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