CH159051A - Process for the preparation of a primary disazo dye. - Google Patents
Process for the preparation of a primary disazo dye.Info
- Publication number
- CH159051A CH159051A CH159051DA CH159051A CH 159051 A CH159051 A CH 159051A CH 159051D A CH159051D A CH 159051DA CH 159051 A CH159051 A CH 159051A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- amino
- preparation
- blue
- disazo dye
- 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. Terfahren zur Darstellung eines primären Disazofarbstoffes. und zur weiteren Kombination wieder in Wasser und überschüssiger Soda gelöst, oder es wird die ursprüngliche saure Kombinations masse unmittelbar mit Natronlauge bezw. Soda neutralisiert und hieraulf mit überschüs siger Soda versetzt.
Zur alkalischen Lösung des Monoazofarbstoffes lässt man sodann unter gutem Rühren die aus 26,2 kg 1-Methyl-4- amino-2-benzolsulfanilid erhaltene Diazolösung bei<B>0-50</B> einfliessen. Nach Verlauf mehrerer Stunden wird aufgewärmt, der Farbstoff aus gesalzen, 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. 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- dung von 1-Chlor-2-amino-4-benzolsulfanilid kuppelt und den so erhaltenen Monoazofarb- stoff weiter in alkalischer Lösung mit der Diazoverbindung von 1-Methyl-4-amino-2- benzolsulfanilid kombiniert. Der neue Farb stoff stellt ein bronzefarbiges Pulver dar, welches sich in Wasser mit blauer, in kon zentrierter Schwefelsäure mit grüner Farbe löst.
Er färbt auf Wolle und Seide ein Blau schwarz von vorzüglicher Walk- bezw. Was serechtheit und sehr guter Lichtechtheit. Beispiel: Die aus 28,2 kg 1-Chlor-2-amino-4-benzol- sulfanilid erhaltene Diazolösung wird in 31,9 kg frisch gefällte 1. 8 -Aminonaphthol - 3. 6- disulfosäure eingetragen.
Nachdem die in stark saurer Lösung bei gewöhnlicher Temperatur sich vollziehende Kupplung vollendet ist, wird entweder der Monoazofarbstoff isoliert Verfahren zur Darstellung eines neuen primären Disazofarbstoffes, dadurch gekenn zeichnet, dass man 1. 8 -Aminonaphthol - 3 . 6-
Additional patent to the main patent No. 155452. Terfahren for the representation of a primary disazo dye. and dissolved again in water and excess soda for further combination, or the original acidic combination mass is immediately BEZW with sodium hydroxide solution. Soda neutralized and then mixed with excess soda.
The diazo solution obtained from 26.2 kg of 1-methyl-4-amino-2-benzenesulfanilide is then allowed to flow in at 0-50 to the alkaline solution of the monoazo dye, with thorough stirring. After several hours it is warmed up, the dye is salted out, filtered off 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. It has been found that a valuable new primary disazo dye is obtained by 1.
8-Aminonaphthol - 3 ..6 - disulfonic acid in acidic solution with the diazo compound of 1-chloro-2-amino-4-benzenesulfanilide and the monoazo dye thus obtained is further coupled in alkaline solution with the diazo compound of 1- Methyl 4-amino-2-benzenesulfanilide 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 excellent milled or wool. What about fastness and very good lightfastness. Example: The diazo solution obtained from 28.2 kg of 1-chloro-2-amino-4-benzenesulfanilide is introduced into 31.9 kg of freshly precipitated 1,8-amino-naphthol-3-6-disulfonic acid.
After the coupling, which takes place in a strongly acidic solution at ordinary temperature, is complete, either the monoazo dye is isolated. Process for the preparation of a new primary disazo dye, characterized in that 1. 8 -aminonaphthol - 3. 6-
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH155452T | 1932-01-01 | ||
CH159051T | 1932-01-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH159051A true CH159051A (en) | 1932-12-15 |
Family
ID=25716583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH159051D CH159051A (en) | 1932-01-01 | 1932-01-01 | Process for the preparation of a primary disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH159051A (en) |
-
1932
- 1932-01-01 CH CH159051D patent/CH159051A/en unknown
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