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.Info
- 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
- Authority
- 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
Links
Landscapes
- 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.
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 |
Family
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. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190111766A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2746955A (en) * | 1952-06-03 | 1956-05-22 | Gen Aniline & Film Corp | Manufacture of azo dyestuffs |
-
1901
- 1901-06-08 GB GB190111766D patent/GB190111766A/en not_active Expired
Cited By (1)
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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