JPS5675449A - Precipitation of anthraquinone - Google Patents
Precipitation of anthraquinoneInfo
- Publication number
- JPS5675449A JPS5675449A JP15058779A JP15058779A JPS5675449A JP S5675449 A JPS5675449 A JP S5675449A JP 15058779 A JP15058779 A JP 15058779A JP 15058779 A JP15058779 A JP 15058779A JP S5675449 A JPS5675449 A JP S5675449A
- Authority
- JP
- Japan
- Prior art keywords
- sulfuric acid
- anthraquinone
- concentration
- slurry
- heating
- 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
Links
Abstract
PURPOSE: To prepare a slurry of anthraquinone fine crystals in sulfuric acid, by dissolving anthraquinone in concentrated sulfuric acid with heating, and adjusting the concentration of sulfuric acid first by adding sulfuric acid of specific concentration, and if necessary adding dilute sulfuric acid or water to the solution.
CONSTITUTION: Anthraquinone is dissolved completely in concentrated sulfuric acid (≥95%) by heating at 60W150°C. The objective slurry of anthraquinone fine crystals in sulfuric acid can be obtained by adding first a sulfuric acid of 50W80% concentration to the solution at 50W120°C to reduce the concentration of the sulfuric acid, and if necessary, adding a dilute sulfuric acid or water to the mixture at 50W 120°C to adjust the concentration of the sulfuric acid to 95W70%. The anthraquinone may have a substituent group such as halogen, OH, alkyl, allyloxy, acylamino, etc.
EFFECT: The use of the above fine crystalline slurry enables the smooth nitrification of anthraquinone.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15058779A JPS5675449A (en) | 1979-11-22 | 1979-11-22 | Precipitation of anthraquinone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15058779A JPS5675449A (en) | 1979-11-22 | 1979-11-22 | Precipitation of anthraquinone |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5675449A true JPS5675449A (en) | 1981-06-22 |
JPS623819B2 JPS623819B2 (en) | 1987-01-27 |
Family
ID=15500139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15058779A Granted JPS5675449A (en) | 1979-11-22 | 1979-11-22 | Precipitation of anthraquinone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5675449A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106045839A (en) * | 2016-06-04 | 2016-10-26 | 江阴市长江化工有限公司 | Preparation method of superfine anthraquinone |
-
1979
- 1979-11-22 JP JP15058779A patent/JPS5675449A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106045839A (en) * | 2016-06-04 | 2016-10-26 | 江阴市长江化工有限公司 | Preparation method of superfine anthraquinone |
CN106045839B (en) * | 2016-06-04 | 2018-08-10 | 江阴市长江化工有限公司 | A kind of preparation method of ultra-fine anthraquinone |
Also Published As
Publication number | Publication date |
---|---|
JPS623819B2 (en) | 1987-01-27 |
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