JPS54141760A - Preparation of benzanthrone - Google Patents
Preparation of benzanthroneInfo
- Publication number
- JPS54141760A JPS54141760A JP4843878A JP4843878A JPS54141760A JP S54141760 A JPS54141760 A JP S54141760A JP 4843878 A JP4843878 A JP 4843878A JP 4843878 A JP4843878 A JP 4843878A JP S54141760 A JPS54141760 A JP S54141760A
- Authority
- JP
- Japan
- Prior art keywords
- dihydroanthraquinone
- acrolein
- benzanthrone
- components
- component
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title substance in high purity, by reacting tetra-and dihydroanthrahydroquinones as first components and dihydroanthraquinone as a second component in a specific proportion with acrolein.
CONSTITUTION: Hydroanthraquinones are reacted with acrolein in an inert solvent and a ring closure agent at 50W150°C to give benzanthrone. 1,4,4a, 9a-Tetrahydroanthraquinone and/or 1,4-dihydroanthrahydroquinone (as first components) and 1,4-dihydroanthraquinone (as a second component) are used at a molar ratio of 55:45W80:20 as the hydroanthraquionones. A lower fatty acid, and an aromatic sulfone may be preferably used as the solvent and the ring closure agent respectively.
EFFECT: Easy crystallization and separation of product.
USE: Raw materials for indanthrene dyes or pigments.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53048438A JPS5823857B2 (en) | 1978-04-24 | 1978-04-24 | Manufacturing method of benzanthrone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53048438A JPS5823857B2 (en) | 1978-04-24 | 1978-04-24 | Manufacturing method of benzanthrone |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54141760A true JPS54141760A (en) | 1979-11-05 |
JPS5823857B2 JPS5823857B2 (en) | 1983-05-18 |
Family
ID=12803347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53048438A Expired JPS5823857B2 (en) | 1978-04-24 | 1978-04-24 | Manufacturing method of benzanthrone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5823857B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5534133A (en) * | 1978-08-31 | 1980-03-10 | Mitsubishi Heavy Ind Ltd | Multistage flush evaporator |
-
1978
- 1978-04-24 JP JP53048438A patent/JPS5823857B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5534133A (en) * | 1978-08-31 | 1980-03-10 | Mitsubishi Heavy Ind Ltd | Multistage flush evaporator |
Also Published As
Publication number | Publication date |
---|---|
JPS5823857B2 (en) | 1983-05-18 |
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