GB190306419A - Improvements in the Manufacture of Indoxyl and Indoxylic Acid - Google Patents

Improvements in the Manufacture of Indoxyl and Indoxylic Acid

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Publication number
GB190306419A
GB190306419A GB190306419DA GB190306419A GB 190306419 A GB190306419 A GB 190306419A GB 190306419D A GB190306419D A GB 190306419DA GB 190306419 A GB190306419 A GB 190306419A
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GB
United Kingdom
Prior art keywords
indoxyl
mixture
acid
indoxylic
manufacture
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
Inventor
James Yate Johnson
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB190306419A publication Critical patent/GB190306419A/en
Expired legal-status Critical Current

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Abstract

6419. Johnson. J. Y., [Badische Anilin & Soda Fabrik]. March 19. Dyes, artificial.-Indoxyl and indoxylic acid are prepared by evaporating in vacuo either an aqueous solution of a mixture of an alkali-metal salt of phenyl-glycocoll-o-carboxylic acid with caustic alkali, or a mixture of the said two compounds in the presence of water. and then further heating the mixture to 200‹ or 250‹ C. until the formation of the indoxyl or indoxylic acid ceases. The yield is about 90 per cent. of that theoretically possible.
GB190306419D 1903-03-19 1903-03-19 Improvements in the Manufacture of Indoxyl and Indoxylic Acid Expired GB190306419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190306419T 1903-03-19

Publications (1)

Publication Number Publication Date
GB190306419A true GB190306419A (en) 1904-01-07

Family

ID=32541452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190306419D Expired GB190306419A (en) 1903-03-19 1903-03-19 Improvements in the Manufacture of Indoxyl and Indoxylic Acid

Country Status (1)

Country Link
GB (1) GB190306419A (en)

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