JPS54148732A - Purification of diphenylamine - Google Patents
Purification of diphenylamineInfo
- Publication number
- JPS54148732A JPS54148732A JP5599478A JP5599478A JPS54148732A JP S54148732 A JPS54148732 A JP S54148732A JP 5599478 A JP5599478 A JP 5599478A JP 5599478 A JP5599478 A JP 5599478A JP S54148732 A JPS54148732 A JP S54148732A
- Authority
- JP
- Japan
- Prior art keywords
- diphenylamine
- distillation
- glyoxal
- residue
- convert
- 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: Glyoxal is beforehand made to act on diphenylamine containing impurities under a melting condition to convert the amine impurities to high-boiling compounds, which is removed by distillation as the residue, thus purifying efficiently title compound useful as an intermediate for various kinds of chemicals.
CONSTITUTION: Diphenylamine is purified by distillation wherein glyoxal is beforehand made to act on crude dihenylamine to convert the amine impurities to high- boiling compounds, which remain as the residue on the distillation. Various amine impurities included in the starting material and selectively react with glyoxal to convert to high-boiling compounds substantially not being distilled off. Then, only simple distillation gives readily high-purity diphenylamine.
EFFECT: High yield, the residue is simply disposed by, e.g., burning, thus reducing costs.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5599478A JPS54148732A (en) | 1978-05-10 | 1978-05-10 | Purification of diphenylamine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5599478A JPS54148732A (en) | 1978-05-10 | 1978-05-10 | Purification of diphenylamine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54148732A true JPS54148732A (en) | 1979-11-21 |
Family
ID=13014625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5599478A Pending JPS54148732A (en) | 1978-05-10 | 1978-05-10 | Purification of diphenylamine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54148732A (en) |
-
1978
- 1978-05-10 JP JP5599478A patent/JPS54148732A/en active Pending
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