GB1291225A - Bromination process - Google Patents
Bromination processInfo
- Publication number
- GB1291225A GB1291225A GB5078968A GB5078968A GB1291225A GB 1291225 A GB1291225 A GB 1291225A GB 5078968 A GB5078968 A GB 5078968A GB 5078968 A GB5078968 A GB 5078968A GB 1291225 A GB1291225 A GB 1291225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chlorine
- sulphonic acid
- bromide ion
- aminoanthraquinone
- bromo
- 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
Abstract
1291225 Preparation of 4-bromo-1-aminoanthraquinone-2-sulphonic acid IMPERIAL CHEMICAL INDUSTRIES Ltd 7 Jan 1970 [25 Oct 1968] 50789/68 Heading C4P 4 - Bromo - 1 - aminoanthraquinone - 2 - sulphonic acid is prepared by treating an aqueous solution of 1-amino-anthraquinone-2-sulphonic acid simultaneously with bromine and chlorine, thereby avoiding progressive increase in the aqueous concentration of bromide ion while bromination proceeds. The bromide ion concentration is 0À002 to 0À004 gram ions per litre. The bromine is preferably introduced into the aqueous solution in vapour form diluted with an inert gas, e.g. air, and optionally mixed with chlorine. In the example given the rate of introduction of chlorine is controlled according to a predetermined programme by a voltage signal from a silver/silver bromide electrode which is responsive to the bromide ion concentration. The end point of the reaction is determined by an electrode measuring the redox potential Br 2 + 2e#2Br.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5078968A GB1291225A (en) | 1968-10-25 | 1968-10-25 | Bromination process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5078968A GB1291225A (en) | 1968-10-25 | 1968-10-25 | Bromination process |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1291225A true GB1291225A (en) | 1972-10-04 |
Family
ID=10457354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5078968A Expired GB1291225A (en) | 1968-10-25 | 1968-10-25 | Bromination process |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1291225A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4213909A (en) * | 1977-09-10 | 1980-07-22 | Bayer Aktiengesellschaft | Process for the preparation of 1-amino-4-bromoanthraquinone-2-sulfonic acid II |
US4213910A (en) * | 1977-09-10 | 1980-07-22 | Bayer Aktiengesellschaft | Process for the preparation of 1-amino-4-bromoanthraquinone-2-sulphonic acid I |
-
1968
- 1968-10-25 GB GB5078968A patent/GB1291225A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4213909A (en) * | 1977-09-10 | 1980-07-22 | Bayer Aktiengesellschaft | Process for the preparation of 1-amino-4-bromoanthraquinone-2-sulfonic acid II |
US4213910A (en) * | 1977-09-10 | 1980-07-22 | Bayer Aktiengesellschaft | Process for the preparation of 1-amino-4-bromoanthraquinone-2-sulphonic acid I |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |