GB1291225A - Bromination process - Google Patents

Bromination process

Info

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
Application number
GB5078968A
Inventor
John Hunter Adam
David Michael Marsh
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB5078968A priority Critical patent/GB1291225A/en
Publication of GB1291225A publication Critical patent/GB1291225A/en
Expired legal-status Critical Current

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.
GB5078968A 1968-10-25 1968-10-25 Bromination process Expired GB1291225A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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