GB189812118A - The Manufacture of a New Sulphonic Acid of the Naphthalene Series and of Colouring Matters therefrom. - Google Patents

The Manufacture of a New Sulphonic Acid of the Naphthalene Series and of Colouring Matters therefrom.

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Publication number
GB189812118A
GB189812118A GB189812118DA GB189812118A GB 189812118 A GB189812118 A GB 189812118A GB 189812118D A GB189812118D A GB 189812118DA GB 189812118 A GB189812118 A GB 189812118A
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Prior art keywords
acid
sulphonic
gamma
sulphonic acid
dye
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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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LEVINSTEIN Ltd
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LEVINSTEIN Ltd
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Application filed by LEVINSTEIN Ltd filed Critical LEVINSTEIN Ltd
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Publication of GB189812118A publication Critical patent/GB189812118A/en
Expired legal-status Critical Current

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Abstract

12,118. Levinstein, I., Herz, R., and Levinstein (Limited). May 28. #1-Acetylamido-alpha4-naphthol-#3-sulphonic-acid-gamma is produced by heating amidonaphthol sulphonic acid-y with glacial acetic acid and a dehydrating-agent, such as sodium acetate, under a reflux cooler. The excess of acetic acid is distilled off and the residue is dissolved in water. The acetylamido compound may be separated by evaporating the solution to dryness, or by concentrating and acidifying it. Dyes, artificial. - Azo and disazo colouring- matters are produced by combining acetylamidonaphthol sulphonic acid-gamma with diazo and tetrazo compounds, and mixed disazo dyes result when a tetrazotized p-diamine is combined with one molecular proportion of the said acid-gamma and with one molecular proportion of an aromatic amine, phenol, oxyphenol, or amidophenol, or a sulphonic or carboxylic acid thereof, for example with amidonaphthol disulphonic acid-H. Disazo dyes derived from p-phenylenediamine, or its homologues, or from naphthylenediamine, are produced by combining the diazo compound of p-nitraniline, p-nitroo-toluidine, or nitronaphthylamine, with acetylamidonaphthol sulphonic acid-y, reducing the nitroazo product, rediazotizing the amidoazo compound thus formed, and combining it with aromatic amines, diamines, amidophenols, or amidophenol ethers, or sulphonic or carboxylic acids thereof. The acetyl group is then split off by heating the dye with caustic soda yielding a dye of greater intensity and darker tint. For example, alpha1alpha2- diazonitronaphthalene, acetylamidonaphthol sulphonic acid-gamma, and ClÚve's alpha1-naphthylamine-#3-or #4- sulphonic acid yield by this process a steel-blue dye for unmordanted cotton. This dye may be diazotized upon the fibre and developed to dark blue or deep black, fast to light and washing by # naphthol or m-phenylenediamine respectively.
GB189812118D 1898-05-28 1898-05-28 The Manufacture of a New Sulphonic Acid of the Naphthalene Series and of Colouring Matters therefrom. Expired GB189812118A (en)

Applications Claiming Priority (1)

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GB189812118T 1898-05-28

Publications (1)

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GB189812118A true GB189812118A (en) 1899-01-28

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ID=32416090

Family Applications (1)

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GB189812118D Expired GB189812118A (en) 1898-05-28 1898-05-28 The Manufacture of a New Sulphonic Acid of the Naphthalene Series and of Colouring Matters therefrom.

Country Status (1)

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GB (1) GB189812118A (en)

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