GB190111766A - The Manufacture or Production of New Azo Colouring Matters and of Intermediate Products for Use therein. - Google Patents

The Manufacture or Production of New Azo Colouring Matters and of Intermediate Products for Use therein.

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Publication number
GB190111766A
GB190111766A GB190111766DA GB190111766A GB 190111766 A GB190111766 A GB 190111766A GB 190111766D A GB190111766D A GB 190111766DA GB 190111766 A GB190111766 A GB 190111766A
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GB
United Kingdom
Prior art keywords
acid
dyes
1alpha4
amidonaphthol
produced
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
Henry Edward Newton
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.)
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 GB190111766A publication Critical patent/GB190111766A/en
Expired legal-status Critical Current

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  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)

Abstract

11,766. Newton, H. E., [Farbenfabriken vorm. F. Bayer & Co.]. June 8. p-p-Diamidodiphenylurea disulphonic acid of the formula is produced by causing phosgene to act upon nitrometanilic acid (NH2 : SO3H : NO2 = 1 : 3 : 4) in presence of a condensing-agent, such as sodium carbonate, and then reducing the resulting dinitro compound, for example, by means of iron filings. The new product is precipitated from a sodiumcarbonate solution by hydrochloric acid as uncoloured needles soluble with difficulty in water. Alternatively, phosgene may be caused to act upon p-phenylenediamine monosulphonic acid whereby the same product is produced. Dyes, artificial.-New disazo dyes, which dye unmordanted cotton red to violet-red shades fast to light, are produced by combining the tetrazo derivative of the foregoing diamido diphenylurea disulphonic acid with #1alpha4-amidonaphthol, its sulphonic acids, or the alkylized derivatives of these compounds, in neutral or acid solutions. Examples are given in which bright-red and violet-red dyes are obtained from #1alpha4-amidonaphthol-#3-sulphonic acid and #1alpha4-amidonaphthol, respectively. The same disazo dyes are also produced by causing phosgene to act upon a solution in sodium carbonate, or the like, of two molecular proportions of monoazo dyes, which are obtained either by combining the diazo compound of p-nitraniline-osulphonic acid with #1alpha4-amidonaphthol, or a derivative thereof, and then reducing the product, or by splitting of the acetyl group from the corresponding monoazo dyes obtained from acetylized p-phenylenediamine monosulphonic acid.
GB190111766D 1901-06-08 1901-06-08 The Manufacture or Production of New Azo Colouring Matters and of Intermediate Products for Use therein. Expired GB190111766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190111766T 1901-06-08

Publications (1)

Publication Number Publication Date
GB190111766A true GB190111766A (en) 1902-05-01

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ID=32619823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190111766D Expired GB190111766A (en) 1901-06-08 1901-06-08 The Manufacture or Production of New Azo Colouring Matters and of Intermediate Products for Use therein.

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GB (1) GB190111766A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746955A (en) * 1952-06-03 1956-05-22 Gen Aniline & Film Corp Manufacture of azo dyestuffs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746955A (en) * 1952-06-03 1956-05-22 Gen Aniline & Film Corp Manufacture of azo dyestuffs

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