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Expired
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Bayer AG
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Farbenfabriken Vorm Friedr Bayer and Co
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Priority claimed from GB191229506Dexternal-prioritypatent/GB191229506A/en
Application filed by Farbenfabriken Vorm Friedr Bayer and CofiledCriticalFarbenfabriken Vorm Friedr Bayer and Co
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Publication of GB191322980ApublicationCriticalpatent/GB191322980A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Abstract
22,980. Farbenfabriken vorm. F. Bayer & Co. Oct. 11. [Addition to 29,506/12.] 1:2:4-Trioxyanthraquinone-3-carboxylic acid is obtained by oxidizing 1: 4-dioxyanthraquinone- 3-carboxylic acid, for example bv means of manganese dioxide in presence of sulphuric acid. 1:4-Dioxyanthraquinone-3-carboxylic acid is obtained by oxidizing 1 :4-dioxy-3-methylanthraquinone.
GB191322980D1912-12-211913-12-11Process for Producing 1.2.4-purpurine-3-carboxylic Acid.
ExpiredGB191322980A
(en)