CH135954A - Process for the preparation of a new trisazo dye. - Google Patents
Process for the preparation of a new trisazo dye.Info
- Publication number
- CH135954A CH135954A CH135954DA CH135954A CH 135954 A CH135954 A CH 135954A CH 135954D A CH135954D A CH 135954DA CH 135954 A CH135954 A CH 135954A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- diazotized
- acid
- new
- gray
- 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
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
- C09B31/22—Trisazo dyes from a coupling component "D" containing directive hydroxyl and amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 131818. Verfahren zur Herstellung eines neuen Trisazofarbstoües. Es wurde gefunden, da.ss man zu einem neuen wertvollen T'risazofarbstoff gelangt, wenn man den diazotierten Disazofarbstoff, der erhalten wird durch Kuppeln der diazotierten 2-Aminonaphthalin-4,8-disulfot- säure mit a-Naphthylamin, Diazotieren des so erhältlichen Monoazofarbstoffes,
Weiter kuppeln mit dem technischen Gemisch der 1,6- und 1,7-Aminonaphthalinsulfosäure und Diazotieren, mit 1-Amino@-5-oxynaphthalin-7- sulfosäure in einem Medium, dessen p$ zwischen 1,5 und 8,4 liegt, vereinigt. Der neue Farbstoff stellt ein schwarzes Pulver dar, welches sieh in Wasser auf Sodazusatz mit grünstichig blaugrauer Farbe löst. In konzentrierter Schwefelsäure löst sich das Produkt grünstichig graublau auf. Die Färbung auf Baumwolle stellt ein grünes Grau dar und ist weiter diazotierbar.
Beispiel: 34,8 Teile 2-aminonaphthalin-4"8-disulfo- saures Natron werden in üblicher Weise mit Nitrit und Salzsäure diazotiert und mit 14,5 Teilen a-Naphthyla.min vereinigt. Der entstandene Farbstoff wird isoliert, in üblicher Weise weiter diazotiert und mit 22,3 Teilen des technischen Gemisches der 1,6- und 1,7-Aminonaplhthalinsulfosäure ge kuppelt.
Nach vollendeter Kombination wird der Disa.zofarbstoff abermals diazotiert und dann die gebildete Diazoverbindung zu einer Lösung von 24 Teilen 1-Amino-5-oxynaph- thalin-7-sulf osäure, die mit Alkali in Natron salz umgewandelt und mit so viel Natrium acetat versetzt war, dass die Reaktion nach erfolgtem Zusatz der Diazoverbindung lakmussauer ist, zugefügt. Die Kupplung ist nach kurzer Zeit vollendet.
Der Trisazo- farbstoff wird in Na.tronsalz umgewandelt, ausgesalzen,, filtriert und getrocknet.
Additional patent to main patent no. 131818. Process for the production of a new trisazo dye. It has been found that a new valuable trisazo dye is obtained if the diazotized disazo dye, which is obtained by coupling the diazotized 2-aminonaphthalene-4,8-disulphotoic acid with α-naphthylamine, is diazotized Monoazo dye,
Then couple with the technical mixture of 1,6- and 1,7-aminonaphthalenesulfonic acid and diazotize with 1-amino @ -5-oxynaphthalene-7-sulfonic acid in a medium whose p $ is between 1.5 and 8.4, united. The new dye is a black powder that dissolves in water on the addition of soda with a greenish blue-gray color. In concentrated sulfuric acid, the product dissolves in a greenish gray-blue. The color on cotton is a green gray and can be further diazotized.
Example: 34.8 parts of 2-aminonaphthalene-4 "8-disulphonic acid sodium are diazotized in the usual way with nitrite and hydrochloric acid and combined with 14.5 parts of a-naphthyla.mine. The resulting dye is isolated and further in the usual way diazotized and coupled with 22.3 parts of the technical mixture of 1,6- and 1,7-aminonaplhthalene sulfonic acid.
After the combination is complete, the disa.zo dye is diazotized again and then the diazo compound formed is converted into a solution of 24 parts of 1-amino-5-oxynaphthalene-7-sulfonic acid, which is converted into sodium salt with alkali and so much sodium acetate is added was that the reaction after the addition of the diazo compound is lakmus-sour, added. The coupling is completed after a short time.
The trisazo dye is converted into sodium salt, salted out, filtered and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH131818T | 1927-10-31 | ||
CH135954T | 1927-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH135954A true CH135954A (en) | 1929-10-15 |
Family
ID=25711690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH135954D CH135954A (en) | 1927-10-31 | 1927-10-31 | Process for the preparation of a new trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH135954A (en) |
-
1927
- 1927-10-31 CH CH135954D patent/CH135954A/en unknown
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