GB1439980A - Process for the manufacture of pure 1-nitroanthraquinone - Google Patents
Process for the manufacture of pure 1-nitroanthraquinoneInfo
- Publication number
- GB1439980A GB1439980A GB4993673A GB4993673A GB1439980A GB 1439980 A GB1439980 A GB 1439980A GB 4993673 A GB4993673 A GB 4993673A GB 4993673 A GB4993673 A GB 4993673A GB 1439980 A GB1439980 A GB 1439980A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitric acid
- nitroanthraquinone
- molar ratio
- pure
- acid
- 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.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1439980 Preparation of pure 1-nitroanthraquinone BAYER AG 26 Oct 1973 [28 Oct 1972] 49936/73 Heading C2C Pure 1-nitroanthraquinone is prepared by nitrating anthraquinone in nitric acid at a concentration of at least 87% at from -20‹ to + 80‹ C. using a molar ratio of nitric acid/ anthraquinone of at least 4 : 1, thereafter in a first step precipitating dinitroanthraquinones either by adjusting the conditions to between an acid concentration of 87 to 99% at a mole ratio of nitric acid/nitration product of no less than 4 : 1 or by decreasing solely the acid concentration to 99 to 87% or by decreasing solely the molar ratio of nitric acid/nitration products to no less than 4 : 1, and in a second step separating off 1-nitroanthraquinone from the filtrate by setting up conditions ranging from an acid concentration of 76% and a molar ratio of nitric acid/nitration products of 19 : 1 to an acid concentration of 96% and a molar ratio of nitric acid/nitration products of 4 : 1.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722253016 DE2253016C3 (en) | 1972-10-28 | 1972-10-28 | Process for the production of pure 1-nitro-anthraquinone |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1439980A true GB1439980A (en) | 1976-06-16 |
Family
ID=5860330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4993673A Expired GB1439980A (en) | 1972-10-28 | 1973-10-26 | Process for the manufacture of pure 1-nitroanthraquinone |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE806554A (en) |
CH (1) | CH597143A5 (en) |
DE (1) | DE2253016C3 (en) |
FR (1) | FR2204611B1 (en) |
GB (1) | GB1439980A (en) |
-
1972
- 1972-10-28 DE DE19722253016 patent/DE2253016C3/en not_active Expired
-
1973
- 1973-10-26 BE BE137094A patent/BE806554A/en unknown
- 1973-10-26 GB GB4993673A patent/GB1439980A/en not_active Expired
- 1973-10-26 CH CH1512273A patent/CH597143A5/xx not_active IP Right Cessation
- 1973-10-26 FR FR7338307A patent/FR2204611B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2204611A1 (en) | 1974-05-24 |
FR2204611B1 (en) | 1977-05-27 |
DE2253016B2 (en) | 1980-06-26 |
DE2253016C3 (en) | 1981-02-26 |
CH597143A5 (en) | 1978-03-31 |
DE2253016A1 (en) | 1974-05-09 |
BE806554A (en) | 1974-04-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |