CH159047A - Process for the preparation of a primary disazo dye. - Google Patents
Process for the preparation of a primary disazo dye.Info
- Publication number
- CH159047A CH159047A CH159047DA CH159047A CH 159047 A CH159047 A CH 159047A CH 159047D A CH159047D A CH 159047DA CH 159047 A CH159047 A CH 159047A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- chloro
- disazo dye
- diazo compound
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B33/02—Disazo dyes
- C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
- C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 155452. Verfahren zur Darstellung eines primären Disazofarbstoffes. Es wurde gefunden, dass man einen neuen wertvollen primären Disazofarbstoff erhält, wenn man 1. 8 -Aminonaphthol - 3 .
6 - disulfo- säure in saurer Lösung mit der Diazoverbin- Jung von 1-Chlor-2-amino-4-benzolsulfäthyl- anilid kuppelt und den so erhaltenen Mono- azofarbstoff weiter -in alkalischer Lösung mit der Diazoverbindung von 4-Chlor-2-aminodi- phenyläther kombiniert. Der neue Farbstoff stellt ein bronzefarbiges Pulver dar, welches sich in Wasser mit blauer, in konzentrierter Schwefelsäure mit grüner Farbe löst.
Er färbt auf Wolle und Seide ein Blauschwarz von vorzüglicher Walk- bezw. Wasserechtheit und sehr guter Lichtechtheit.
Beispiel: Die aus 31 kg 1-Chlor-2-amino-4-benzol- sulfäthylanilid erhaltene Diazolösung wird in 31,9 kg frisch gefällte 1.8-Aminonaphthol- 3. 6-disulfosäure eingetragen.
Nachdem die in stark saurer Lösung bei gewöhnlicher Tem peratur sich vollziehende Kupplung vollendet ist, wird entweder der Monoazofarbstoff iso liert und zur weiteren Kombination wieder in Wasser und überschüssiger Soda gelöst, oder es wird die ursprüngliche saure Kombi nationsmasse unmittelbar mit Natronlauge bezw. Soda neutralisiert und hierauf mit über schüssiger Soda versetzt.
Zur alkalischen Lö sung des Monoazofarbstoffes lässt man sodann unter gutem Rühren die aus 22 kg 4-Chlor- 2-aminodiphenyläther erhaltene Diazolösung bei 0-50 eirAlliessen. Die Kupplung voll zieht sich rasch. Nach Verlauf mehrerer Stun den wird aufgewärmt, der ausgeschiedene Farbstoff eventuell nach Zusatz von etwas Kochsalz abfiltriert und getrocknet.
Der erhaltene Farbstoff bildet ein bronze farbiges Pulver, das in Wasser mit blauer, in konzentrierter Schwefelsäure mit grüner Farbe löslich ist. Er färbt auf Wolle und Seide ein Blauschwarz von vorzüglicher Walk bezw. Wasserechtheit und sehr guter Licht echtheit.
Additional patent to main patent No. 155452. Process for the preparation of a primary disazo dye. It has been found that a new valuable primary disazo dye is obtained by using 1. 8 -aminonaphthol - 3.
6 - disulfonic acid in acidic solution with the diazo compound Jung of 1-chloro-2-amino-4-benzenesulfethyl anilide and the monoazo dye thus obtained further -in alkaline solution with the diazo compound of 4-chloro-2- aminodiphenyl ether combined. The new dye is a bronze-colored powder that dissolves in water with a blue color and in concentrated sulfuric acid with a green color.
He dyes wool and silk a blue-black of exquisite milled or wool. Waterfastness and very good lightfastness.
Example: The diazo solution obtained from 31 kg of 1-chloro-2-amino-4-benzenesulfethylanilide is introduced into 31.9 kg of freshly precipitated 1,8-aminonaphthol-3,6-disulfonic acid.
After the coupling, which takes place in a strongly acidic solution at the usual temperature, is completed, either the monoazo dye is isolated and dissolved again in water and excess soda for further combination, or the original acidic combination mass is immediately added with sodium hydroxide solution. Soda neutralized and then added excess soda.
For the alkaline solution of the monoazo dye, the diazo solution obtained from 22 kg of 4-chloro-2-aminodiphenyl ether is then left at 0-50 degrees with thorough stirring. The clutch pulls itself out quickly. After several hours it is warmed up, the precipitated dye is filtered off, possibly after adding a little common salt, and dried.
The dye obtained forms a bronze-colored powder which is soluble in water with a blue color and in concentrated sulfuric acid with a green color. He dyes wool and silk a blue-black of exquisite milled wool respectively. Waterfastness and very good lightfastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH159047T | 1931-10-11 | ||
CH155452T | 1932-01-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH159047A true CH159047A (en) | 1932-12-15 |
Family
ID=25716579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH159047D CH159047A (en) | 1931-10-11 | 1931-10-11 | Process for the preparation of a primary disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH159047A (en) |
-
1931
- 1931-10-11 CH CH159047D patent/CH159047A/en unknown
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