JPS56163151A - Preparation of anthraquinone series dye - Google Patents
Preparation of anthraquinone series dyeInfo
- Publication number
- JPS56163151A JPS56163151A JP6759080A JP6759080A JPS56163151A JP S56163151 A JPS56163151 A JP S56163151A JP 6759080 A JP6759080 A JP 6759080A JP 6759080 A JP6759080 A JP 6759080A JP S56163151 A JPS56163151 A JP S56163151A
- Authority
- JP
- Japan
- Prior art keywords
- cake
- diamino
- anthraquinone
- oleum
- recovered
- 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 the titled dye containing considerably reduced amounts of byproducts causing wool contamination, by suspending and treating a dye cake obtained by brominating and hydrolyzing diamino-anthraquinone in an aqueous alkali solution.
CONSTITUTION: 1,5-or 1,8-Diamino-anthraquinone is dissolved in concentrated sulfuric acid or oleum, and reacted with molecular bromine to obtain a brominated compound of formula I or II, where n is 0W2. Next, the brominated compound is dissolved in concentrated sulfuric acid or oleum, and heated in the presence of a catalyst (e.g. boric acid) to hydrolyze. Thereafter, the reactant is mixed with water to deposit brominated diamino-dihydroxyanthraquinone of formula III or IV, where m is 0W2 and the average value of m in a mixture is 0.7W1.5, and the cake is separated, washed and recovered. Subsequently, the cake is suspended and treated for one hour or more at a temperature of 20°W100°C in an aqueous alkali solution having a concentration of 0.01W10wt% in an amount by weight of about 10W 1,000 times, based on the solid matter of the cake, and thereafter the cake is separated, washed the recovered.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6759080A JPS56163151A (en) | 1980-05-21 | 1980-05-21 | Preparation of anthraquinone series dye |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6759080A JPS56163151A (en) | 1980-05-21 | 1980-05-21 | Preparation of anthraquinone series dye |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56163151A true JPS56163151A (en) | 1981-12-15 |
JPS6245903B2 JPS6245903B2 (en) | 1987-09-29 |
Family
ID=13349274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6759080A Granted JPS56163151A (en) | 1980-05-21 | 1980-05-21 | Preparation of anthraquinone series dye |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56163151A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58196260A (en) * | 1982-05-03 | 1983-11-15 | バイエル・アクチエンゲゼルシヤフト | Anthraquinone dyes, manufacture, use and bichromophoric substance containing same |
-
1980
- 1980-05-21 JP JP6759080A patent/JPS56163151A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58196260A (en) * | 1982-05-03 | 1983-11-15 | バイエル・アクチエンゲゼルシヤフト | Anthraquinone dyes, manufacture, use and bichromophoric substance containing same |
JPH0442438B2 (en) * | 1982-05-03 | 1992-07-13 | Bayer Ag |
Also Published As
Publication number | Publication date |
---|---|
JPS6245903B2 (en) | 1987-09-29 |
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