JPS5394334A - Preparation of high purity quinacridone - Google Patents

Preparation of high purity quinacridone

Info

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
Application number
JP768977A
Other languages
Japanese (ja)
Inventor
Shigeo Yokoyama
Mitsuru Katayose
Osamu Okuno
Kyugo Tanaka
Teruyuki Misumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP768977A priority Critical patent/JPS5394334A/en
Publication of JPS5394334A publication Critical patent/JPS5394334A/en
Pending legal-status Critical Current

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
JP768977A 1977-01-28 1977-01-28 Preparation of high purity quinacridone Pending JPS5394334A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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