JPS5690053A - Preparation of 1,4-diaminoanthraquinone-2-sulfonic acid - Google Patents
Preparation of 1,4-diaminoanthraquinone-2-sulfonic acidInfo
- Publication number
- JPS5690053A JPS5690053A JP16897579A JP16897579A JPS5690053A JP S5690053 A JPS5690053 A JP S5690053A JP 16897579 A JP16897579 A JP 16897579A JP 16897579 A JP16897579 A JP 16897579A JP S5690053 A JPS5690053 A JP S5690053A
- Authority
- JP
- Japan
- Prior art keywords
- diaminoanthraquinone
- sulfate
- sulfonic acid
- give
- air
- 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: To obtain the titled compound which is an intermediate for a disperse dye in high yield and purity through a relatively simple operation, by oxidizing leuco- 1,4-diaminoanthraquinone with air, sulfating the oxidation product, and rearranging the sulfate under heating in the same reactor.
CONSTITUTION: Leuco-1,4-diaminoanthraquinone is oxidized with air in an inert solvent, e.g. 1,2,4-trichlorobenzene, to give 1,4-diaminoanthraquinone, which is then sulfated with sulfuric acid to afford 1,4-diaminoanthraquinone.sulfate. The sulfate is then heated at 190°C or above, preferably 200W220°C, to give 1,4-diaminoanthraquinone-2-sulfonic acid. The oxidation reaction is carried out at 100°C, preferably 130W160°C. An organic acid salt, e.g. cobalt salt, may be used as a catalyst. The concentration of the sulfuric acid is 70% or more, preferably 90W 100%.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16897579A JPS5690053A (en) | 1979-12-24 | 1979-12-24 | Preparation of 1,4-diaminoanthraquinone-2-sulfonic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16897579A JPS5690053A (en) | 1979-12-24 | 1979-12-24 | Preparation of 1,4-diaminoanthraquinone-2-sulfonic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5690053A true JPS5690053A (en) | 1981-07-21 |
Family
ID=15878027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16897579A Pending JPS5690053A (en) | 1979-12-24 | 1979-12-24 | Preparation of 1,4-diaminoanthraquinone-2-sulfonic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5690053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323590A (en) * | 2018-10-30 | 2019-02-12 | 阜阳市四通化工有限公司 | A kind of p-aminobenzene sulfonic acid solidifies the preparation method of indexable furnace and p-aminobenzene sulfonic acid |
-
1979
- 1979-12-24 JP JP16897579A patent/JPS5690053A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323590A (en) * | 2018-10-30 | 2019-02-12 | 阜阳市四通化工有限公司 | A kind of p-aminobenzene sulfonic acid solidifies the preparation method of indexable furnace and p-aminobenzene sulfonic acid |
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