JPS5394334A - Preparation of high purity quinacridone - Google Patents
Preparation of high purity quinacridoneInfo
- Publication number
- JPS5394334A JPS5394334A JP768977A JP768977A JPS5394334A JP S5394334 A JPS5394334 A JP S5394334A JP 768977 A JP768977 A JP 768977A JP 768977 A JP768977 A JP 768977A JP S5394334 A JPS5394334 A JP S5394334A
- Authority
- JP
- Japan
- Prior art keywords
- quinacridone
- high purity
- preparation
- oxidation
- quinaldoquinone
- 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
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
PURPOSE: To prepare a high purity quinacridone by the oxidation of 6, 13-dihydroquinacridone with O2-containing gas in a solvent comprising a mixture containing an alcohol, water and an alkali hydroxide, whereby production of quinaldoquinone is prevented and the oxidation reaction is smoothly proceeded.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP768977A JPS5394334A (en) | 1977-01-28 | 1977-01-28 | Preparation of high purity quinacridone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP768977A JPS5394334A (en) | 1977-01-28 | 1977-01-28 | Preparation of high purity quinacridone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5394334A true JPS5394334A (en) | 1978-08-18 |
Family
ID=11672743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP768977A Pending JPS5394334A (en) | 1977-01-28 | 1977-01-28 | Preparation of high purity quinacridone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5394334A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0363759A2 (en) * | 1988-10-12 | 1990-04-18 | Bayer Ag | Process for the manufacture of a possibly substituted quinacridone |
US5286863A (en) * | 1991-08-22 | 1994-02-15 | Ciba-Geigy Corporation | Oxidation process for preparing quinacridone pigments |
US5457203A (en) * | 1993-09-15 | 1995-10-10 | Ciba-Geigy Corporation | Pigmentary synthesis of quinacridone solid solutions |
US5502192A (en) * | 1994-08-08 | 1996-03-26 | Ciba-Geigy Corporation | Process for the preparation of quinacridones from dihydroquinacridones in an aqueous medium |
CN102942802A (en) * | 2012-11-23 | 2013-02-27 | 江苏双乐化工颜料有限公司 | Preparing method of pigment red 122 |
-
1977
- 1977-01-28 JP JP768977A patent/JPS5394334A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0363759A2 (en) * | 1988-10-12 | 1990-04-18 | Bayer Ag | Process for the manufacture of a possibly substituted quinacridone |
US5286863A (en) * | 1991-08-22 | 1994-02-15 | Ciba-Geigy Corporation | Oxidation process for preparing quinacridone pigments |
US5457203A (en) * | 1993-09-15 | 1995-10-10 | Ciba-Geigy Corporation | Pigmentary synthesis of quinacridone solid solutions |
US5502192A (en) * | 1994-08-08 | 1996-03-26 | Ciba-Geigy Corporation | Process for the preparation of quinacridones from dihydroquinacridones in an aqueous medium |
CN102942802A (en) * | 2012-11-23 | 2013-02-27 | 江苏双乐化工颜料有限公司 | Preparing method of pigment red 122 |
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