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GB191229506A - Process for the Production of 1.2.4-purpurine-3-carboxylic Acid. - Google Patents

Process for the Production of 1.2.4-purpurine-3-carboxylic Acid.

Info

Publication number
GB191229506A
GB191229506A GB191229506DA GB191229506A GB 191229506 A GB191229506 A GB 191229506A GB 191229506D A GB191229506D A GB 191229506DA GB 191229506 A GB191229506 A GB 191229506A
Authority
GB
United Kingdom
Prior art keywords
carboxylic acid
purpurine
production
dioxyanthraquinone
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
Application number
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.)
Bayer AG
Original Assignee
Farbenfabriken Vorm Friedr Bayer and Co
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 Farbenfabriken Vorm Friedr Bayer and Co filed Critical Farbenfabriken Vorm Friedr Bayer and Co
Application granted granted Critical
Publication of GB191229506A publication Critical patent/GB191229506A/en
Priority to GB191322980D priority Critical patent/GB191322980A/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

29,506. Farbenfabriken vorm. F. Bayer & Co. Dec. 27, 1911, [Convention date]. 1:2:4-Trioxyanthraquinone-3-carboxylic acid is obtained by treating 1: 2-dioxyanthraquinone- 3-carboxylic acid with oxidizing-agents, for example, manganese dioxide in concentrated sulphuric acid; it is identical with the pseudopurpurin of madder. 1:2-Dioxyanthraquinone-3-carboxylic acid is obtained by fusing 2-halogenanthraquinone-3- carboxylic acid with caustic alkali.
GB191229506D 1911-12-27 1912-12-21 Process for the Production of 1.2.4-purpurine-3-carboxylic Acid. Expired GB191229506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB191322980D GB191322980A (en) 1912-12-21 1913-12-11 Process for Producing 1.2.4-purpurine-3-carboxylic Acid.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191229506X 1911-12-27

Publications (1)

Publication Number Publication Date
GB191229506A true GB191229506A (en) 1913-05-01

Family

ID=32522819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191229506D Expired GB191229506A (en) 1911-12-27 1912-12-21 Process for the Production of 1.2.4-purpurine-3-carboxylic Acid.

Country Status (1)

Country Link
GB (1) GB191229506A (en)

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