GB1465739A - Process for the preparation of pure 1-nitroanthraquinone - Google Patents
Process for the preparation of pure 1-nitroanthraquinoneInfo
- Publication number
- GB1465739A GB1465739A GB3738674A GB3738674A GB1465739A GB 1465739 A GB1465739 A GB 1465739A GB 3738674 A GB3738674 A GB 3738674A GB 3738674 A GB3738674 A GB 3738674A GB 1465739 A GB1465739 A GB 1465739A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitric acid
- nitroanthraquinone
- anthraquinone
- mole fraction
- distillation
- 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
1465739 1-Nitroanthraquinone BAYER AG 27 Aug 1974 [31 Aug 1973] 37386/74 Heading C2C 1-Nitroanthraquinone which is substantially free from dinitroanthraquinone is prepared by nitrating anthraquinone or a mixture containing anthraquinone with at least 90% nitric acid at a temperature of at least 0‹ C. and with a mole ratio of nitric acid to anthraquinone of less than 20 : 1; stopping the reaction when the anthraquinone conversion is at least 50% by cooling the reaction to not more than 30‹ C. and/or by adjusting the nitric acid mole fraction to not more than 0À86; precipitating 1-nitroanthraquinone by adjusting the nitric acid mole fraction to 0À7 to 0À4 and/or reducing the temperature to not more than 20‹ C., and separating the precipitated 1-nitroanthraquinone and subjecting it to vacuum distillation. The nitric acid mole fraction may be reduced by addition of dilute nitric acid and/or addition of water and/or removal of nitric acid by distillation. The vacuum distillation may be carried out in the presence of at least one solvent which is inert under the distillation conditions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732343978 DE2343978A1 (en) | 1973-08-31 | 1973-08-31 | PROCESS FOR THE PRODUCTION OF PURE 1-NITRO-ANTHRAQUINONE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1465739A true GB1465739A (en) | 1977-03-02 |
Family
ID=5891274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3738674A Expired GB1465739A (en) | 1973-08-31 | 1974-08-27 | Process for the preparation of pure 1-nitroanthraquinone |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5051125A (en) |
| BE (1) | BE819280A (en) |
| BR (1) | BR7407182D0 (en) |
| CH (1) | CH601175A5 (en) |
| DD (1) | DD114805A5 (en) |
| DE (1) | DE2343978A1 (en) |
| DK (1) | DK461574A (en) |
| FR (1) | FR2242368B1 (en) |
| GB (1) | GB1465739A (en) |
| LU (1) | LU70820A1 (en) |
| NL (1) | NL7411530A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2521891B2 (en) * | 1975-05-16 | 1980-02-28 | Bayer Ag, 5090 Leverkusen | Process for stopping nitrations by distillation |
| DE2637689C3 (en) * | 1976-08-21 | 1980-09-25 | Bayer Ag, 5090 Leverkusen | Process for cleaning swelling organic products |
| JPS5387345A (en) * | 1977-01-06 | 1978-08-01 | Sumitomo Chem Co Ltd | Method of preparing 1-nitroanthraquinone |
-
1973
- 1973-08-31 DE DE19732343978 patent/DE2343978A1/en not_active Withdrawn
-
1974
- 1974-08-27 GB GB3738674A patent/GB1465739A/en not_active Expired
- 1974-08-28 BE BE147974A patent/BE819280A/en unknown
- 1974-08-29 CH CH1178274A patent/CH601175A5/xx not_active IP Right Cessation
- 1974-08-29 DD DD18078574A patent/DD114805A5/xx unknown
- 1974-08-29 BR BR718274A patent/BR7407182D0/en unknown
- 1974-08-29 NL NL7411530A patent/NL7411530A/en not_active Application Discontinuation
- 1974-08-29 JP JP9846474A patent/JPS5051125A/ja active Pending
- 1974-08-29 LU LU70820A patent/LU70820A1/xx unknown
- 1974-08-30 DK DK461574A patent/DK461574A/da unknown
- 1974-08-30 FR FR7429749A patent/FR2242368B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2242368A1 (en) | 1975-03-28 |
| LU70820A1 (en) | 1975-06-11 |
| DE2343978A1 (en) | 1975-04-03 |
| BR7407182D0 (en) | 1975-06-24 |
| JPS5051125A (en) | 1975-05-07 |
| DD114805A5 (en) | 1975-08-20 |
| FR2242368B1 (en) | 1978-04-28 |
| BE819280A (en) | 1975-02-28 |
| DK461574A (en) | 1975-04-28 |
| NL7411530A (en) | 1975-03-04 |
| CH601175A5 (en) | 1978-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |