CH136565A - Process for the preparation of a stain dye. - Google Patents
Process for the preparation of a stain dye.Info
- Publication number
- CH136565A CH136565A CH136565DA CH136565A CH 136565 A CH136565 A CH 136565A CH 136565D A CH136565D A CH 136565DA CH 136565 A CH136565 A CH 136565A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- diazotized
- stain
- acid
- preparation
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title claims description 3
- 239000000975 dye Substances 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 150000008049 diazo compounds Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- JBIJLHTVPXGSAM-UHFFFAOYSA-N 2-naphthylamine Chemical compound C1=CC=CC2=CC(N)=CC=C21 JBIJLHTVPXGSAM-UHFFFAOYSA-N 0.000 claims description 2
- WUBBRNOQWQTFEX-UHFFFAOYSA-N 4-aminosalicylic acid Chemical compound NC1=CC=C(C(O)=O)C(O)=C1 WUBBRNOQWQTFEX-UHFFFAOYSA-N 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 229960004909 aminosalicylic acid Drugs 0.000 claims description 2
- 239000000987 azo dye Substances 0.000 claims 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 1
- 239000002253 acid Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- -1 7-naphthyl Chemical group 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000000983 mordant dye Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Paper (AREA)
Description
Verfahren zur Darstellung eines Beizenfarbstof%s. lin Hauptpatent wurde ein Verfahren be schrieben, wonach ein wertvoller Beizenfarb- stoff entsteht, wenn man die p-Amino-o-stilfo- benzolazosalicylsäure dianotiert und die Diazo- verbindung in saurem Medium bei erhöhter Temperatur behandelt.
Es wurde nun gefunden, dass ein ähnlicher Farbstoff entsteht, wenn man den aus diano tierter p-Aminosalicylsäure und dem techni schen Gemisch von 1:6- und 7 :7-Naphtyl- aminsulfosäure erhältlichen Amittoazofarbstoff dianotiert und die erhaltene Diazoverbindung in saurem, wässerigem Medium bei erhöhter Temperatur behandelt, bis die Kupplungs fähigkeit vollständig verschwunden ist.
Das Verfahren kann beispielsweise auf folgende Art ausgeführt werden 387 Teile des Aminoazofarbstoffes aus dianotierter p-Atnittosalicylsätire und dem technischen Gemischvon 1: 6- und 1: 7-Naphtyl- aminsulfosäure werden in verdünnter Soda gelöst. Zu dieser Lösung werden 69 Teile Natriumnitrit zugefügt und die Mischung wird unter Kühlen und Rühren allmählich in 600 Teile Salzsäure eingegeben; worauf sich die Diazoverbindung ausscheidet.
Die Suspension dieser Diazoverbindung, die noch überschüssige Säure enthält, wird zum Kochen erhitzt, bis die einsetzende Gas entwicklung aufgehört hat und die Kupplungs fähigkeit vollständig verschwunden ist. Man kühlt ab, worauf sich der entstandene Farb stoff ausscheidet; eventuell vervollständigt man die Ausscheidung durch Zugabe von etwas Salz. Der Farbstoff wird abfiltriert und ge trocknet.
An Stelle von Salzsäure kann in diesem Beispiel mit gleichem Resultat die äquivalente Menge einer andern Säure, z. B. Schwefel säure, verwendet werden.
Der neue Farbstoff löst sich in Wasser mit brauner Farbe, in konzentrierter Schwefel säure mit violetter Farbe. Aus der Schwefel säurelösung fällt er auf Zusatz von Wasser in Form schwarzer Flocken aus. Der neue Farbstoff gibt mit Chrombeize auf Baumwolle gedruckt braune Nuancen von guten Echtheits eigenschaften.
Process for the preparation of a mordant dye% s. In the main patent, a process was described according to which a valuable stain dye is produced if the p-amino-o-stilfobenzolazosalicylic acid is dianotized and the diazo compound is treated in an acid medium at elevated temperature.
It has now been found that a similar dye is formed when the amittoazo dye obtainable from diano-tated p-aminosalicylic acid and the technical mixture of 1: 6- and 7: 7-naphthyl aminesulfonic acid is dianotized and the diazo compound obtained is dianotized in an acidic, aqueous medium treated at elevated temperature until the coupling ability has completely disappeared.
The process can be carried out, for example, in the following way. 387 parts of the aminoazo dye from dianotized p-Atnittosalicylsätire and the technical mixture of 1: 6- and 1: 7-naphthylamine sulfonic acid are dissolved in dilute soda. 69 parts of sodium nitrite are added to this solution and the mixture is gradually added to 600 parts of hydrochloric acid with cooling and stirring; whereupon the diazo compound precipitates.
The suspension of this diazo compound, which still contains excess acid, is heated to the boil until the evolution of gas has ceased and the coupling ability has completely disappeared. It is cooled, whereupon the resulting dye precipitates; eventually you complete the excretion by adding a little salt. The dye is filtered off and dried.
In this example, instead of hydrochloric acid, the equivalent amount of another acid, e.g. B. sulfuric acid can be used.
The new dye dissolves in water with a brown color, in concentrated sulfuric acid with a purple color. From the sulfuric acid solution it precipitates in the form of black flakes on addition of water. When printed on cotton with chrome stain, the new dye gives brown nuances with good fastness properties.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE136565X | 1927-01-10 | ||
| CH134944T | 1928-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH136565A true CH136565A (en) | 1929-11-15 |
Family
ID=25712401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH136565D CH136565A (en) | 1927-01-10 | 1928-01-02 | Process for the preparation of a stain dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH136565A (en) |
-
1928
- 1928-01-02 CH CH136565D patent/CH136565A/en unknown
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