GB190308503A - Improvements in the Manufacture of Halogen Derivatives of Oxyanthraquinones. - Google Patents

Improvements in the Manufacture of Halogen Derivatives of Oxyanthraquinones.

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Publication number
GB190308503A
GB190308503A GB190308503DA GB190308503A GB 190308503 A GB190308503 A GB 190308503A GB 190308503D A GB190308503D A GB 190308503DA GB 190308503 A GB190308503 A GB 190308503A
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United Kingdom
Prior art keywords
acid
added
colouring
flavo
purpurin
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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
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MICHAEL ILJINSKIJ
Wedekind & Co R
Original Assignee
MICHAEL ILJINSKIJ
Wedekind & Co R
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Application filed by MICHAEL ILJINSKIJ, Wedekind & Co R filed Critical MICHAEL ILJINSKIJ
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Publication of GB190308503A publication Critical patent/GB190308503A/en
Expired legal-status Critical Current

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

Abstract

8503. Iljinskij, M., and Wedekind & Co., R. April 14. Dyes, artificial; b-oxyanthraquinones.-Halogen compounds of m-mono-oxyanthraquinone, anthraflavic acid, isoanthraflavic acid, alizarin, flavopurpurin, and isopurpurin, &c. are obtained by treating these bodies in aqueous suspension. The bromo compound is obtained in the cold, and the chloro compound under heat, assisted by the addition of neutral salts or of sulphuric acid. The new bodies are permanent, may be re-crystallized without decomposition, can be dissolved in dilute alkali without decomposition, and can be precipitated from the latter solution by acids. When sublimed, they decompose, the halogen escaping. When heated with fuming sulphuric acid, sulphonic acids form. When derived from colouring oxyanthraquinones, they produce directly colouring-matters, and when from either colouring or non-colouring oxyanthraquinones, they can be used as raw materials for making new colouring- matters. The following examples are given :-(1) m-mono-oxyanthraquinone or antbraflavic acid is suspended in water, and sulphuric acid and bromine added in the cold. The light-yellow dibromo compound formed is filtered off, washed, and dried. (2) Anthraflavic acid or flavo-purpurin is suspended in water and slightly acidulated with sulphuric acid. Bromine is then added in the cold while stirring. Tribromo-anthraflavic acid is produced, and is filtered off &c. When flavo-purpurin is used, a small quantity of sodium sulphite is added before filtering &c. (3) Alizarin or flavo-purpurin is suspended in water, brought to ebullition, and a mixture of potassium chlorate and crude hydrochloric acid slowly added. The light yellow precipitate formed is filtered &c. as usual. When flavo-purpurin is used, a solution of the compound obtained in dilute alkali has a somewhat lighter colour than flavopurpurin. Mordanted fabrics, when dyed therewith, acquire more yellowish shades. (4) Anthraflavic acid is suspended in water, sulphuric acid is added, and the whole is heated to about 120‹ C. and maintained at this temperature, while a solution of potassium chlorate and common salt is allowed to enter slowly while stirring. The product obtained is cooled, sodium bisulphite is added, and the resultant fine yellow dichloroanthraflavic acid is filtered off &c.
GB190308503D 1903-04-14 1903-04-14 Improvements in the Manufacture of Halogen Derivatives of Oxyanthraquinones. Expired GB190308503A (en)

Applications Claiming Priority (1)

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GB190308503T 1903-04-14

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GB190308503A true GB190308503A (en) 1904-04-14

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ID=32253213

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GB190308503D Expired GB190308503A (en) 1903-04-14 1903-04-14 Improvements in the Manufacture of Halogen Derivatives of Oxyanthraquinones.

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GB (1) GB190308503A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695302A (en) * 1952-02-15 1954-11-23 Interchem Corp 1, 4, 5 trihalo-hydroxy anthraquinone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695302A (en) * 1952-02-15 1954-11-23 Interchem Corp 1, 4, 5 trihalo-hydroxy anthraquinone

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