CH232510A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH232510A CH232510A CH232510DA CH232510A CH 232510 A CH232510 A CH 232510A CH 232510D A CH232510D A CH 232510DA CH 232510 A CH232510 A CH 232510A
- Authority
- CH
- Switzerland
- Prior art keywords
- sulfonic acid
- parts
- disazo dye
- hand
- 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
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/02—Disazo dyes
- C09B35/039—Disazo dyes characterised by the tetrazo component
- C09B35/08—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 229184. Verfahren zur Herstellung eines Bisazofarbstoffes. Es wurde gefunden, dass ein wertvoller Disazofarbstoff erhalten werden kann, wenn man tetrazotiertes 3. 3'-Dioxy-4. 4'-diamino- diphenyl einerseits mit 1.8-Dioxynaphthalin- 4-sulfonsäure und anderseits mit 2-Phenyl- amino-5-oxynaphthalin-7-sulf onsäurekuppelt.
Der neue Farbstoff ist ein dunkles Pul ver, das sich in Wasser und in verdünnten Ätzalkalien mit rotstichig blauer und in kon zentrierter Schwefelsäure mit grünstichig blauer Farbe löst und pflanzliche Fasern nach dem ein- oder zweibadigen Nachkupfe- rungsverfahren in reinen Blautönen von sehr guter Wasch- und Lichtechtheit färbt.
Die Tetrazotierung des 3. 3'-Dioxy-4. 4'- diaminodiphenyls, das zum Beispiel durch Uerseifung von Dianisidin mit Aluminium chlorid erhalten werden kann, erfolgt in üblicher Weise. Die Kupplung wird in alka lischem, vorzugsweise in ätzalkalischem oder ammoniakalkalischem Medium durchgeführt und kann auch in Gegenwart von Hydro- xyden der Erdalkalien vorgenommen werden.
<I>Beispiel:</I> 10,8 Teile 3 . 3' - Dioxy - 4 . 4' - diamino- diphenyl werden in üblicher Weise mit 6,9 Teilen Natriumnitrit in Gegenwart von Salz säure tetrazotiert. Das kristallisierte Tetraz- oxyd wird abfiltriert und bei 5 in ein Ge misch von 12 Teilen 1.
8-Dioxynaphthalin-4- sulfonsäure und 20 Teilen Calciumhydroxyd in 150 Teilen Wasser eingetragen. Man rührt während 1 Stunde bei 5 bis 8 und während 1 Stunde bei 10 bis 15 . Hierauf gibt man ein Gemisch von 15,8 Teilen 2-Phenylamno- 5-oxynaphthalin-7-sulfonsäure, 9 Teilen Cal ciumhydroxyd und 100 Teilen Wasser hinzu, rührt während 1 Stunde bei 15 bis 20 und führt die Kupplung bei 25 bis 30 zu Ende.
Man verdünnt das Kupplungsgemisch mit 1000 Teilen heissem Wasser und hält die Temperatur nach Zusatz von 65 Teilen was serfreiem Natriumcarbonat während r/2 Stunde bei 80 bis 85 . Man filtriert vom abgeschie denen Calciumcarbonat ab und versetzt das Filtrat mit Kochsalz und Salzsäure. Der Disazofarbstoff wird abfiltriert und ge trocknet.
Additional patent to main patent No. 229184. Process for the production of a bisazo dye. It has been found that a valuable disazo dye can be obtained by using tetrazotized 3,3'-dioxy-4. 4'-diamino-diphenyl coupled on the one hand with 1,8-dioxynaphthalene-4-sulfonic acid and on the other hand with 2-phenylamino-5-oxynaphthalene-7-sulfonic acid.
The new dye is a dark powder that dissolves in water and in dilute caustic alkalis with a reddish blue color and in concentrated sulfuric acid with a greenish blue color and, after the one- or two-bath post-copper plating process, plant fibers are very good for washing. and color fastness to light.
The tetrazotization of the 3rd 3'-dioxy-4. 4'-diaminodiphenyl, which can be obtained, for example, by saponifying dianisidine with aluminum chloride, is carried out in the usual way. The coupling is carried out in an alkaline, preferably in an alkaline or ammonia-alkaline medium and can also be carried out in the presence of hydroxides of the alkaline earths.
<I> Example: </I> 10.8 parts 3. 3 '- Dioxy - 4. 4 '- diamino-diphenyl are tetrazotized in the usual manner with 6.9 parts of sodium nitrite in the presence of hydrochloric acid. The crystallized tetrazoxide is filtered off and at 5 in a mixture of 12 parts of 1.
8-Dioxynaphthalene-4-sulfonic acid and 20 parts of calcium hydroxide in 150 parts of water. The mixture is stirred for 1 hour at 5 to 8 and for 1 hour at 10 to 15. A mixture of 15.8 parts of 2-phenylamno-5-oxynaphthalene-7-sulfonic acid, 9 parts of calcium hydroxide and 100 parts of water are then added, the mixture is stirred for 1 hour at 15 to 20 and the coupling at 25 to 30 is completed .
The coupling mixture is diluted with 1000 parts of hot water and the temperature is maintained at 80 to 85 for half an hour after the addition of 65 parts of sodium carbonate without water. The calcium carbonate deposited is filtered off and the filtrate is mixed with salt and hydrochloric acid. The disazo dye is filtered off and dried.
Claims (1)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH232510T | 1941-02-18 | ||
CH232505T | 1941-02-18 | ||
CH609299X | 1942-02-03 | ||
CH616155X | 1942-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH232510A true CH232510A (en) | 1944-05-31 |
Family
ID=27429729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH232510D CH232510A (en) | 1941-02-18 | 1941-02-18 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH232510A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2476261A (en) * | 1946-04-11 | 1949-07-12 | Ciba Ltd | Process for the manufacture of asymmetrical polyazo-dyestuffs |
US2476259A (en) * | 1946-03-08 | 1949-07-12 | Ciba Ltd | Disazo dye from dihydroxy benzidine and process therefor |
US2476260A (en) * | 1946-04-11 | 1949-07-12 | Ciba Ltd | Process for the manufacture of disazo-dyestuffs |
-
1941
- 1941-02-18 CH CH232510D patent/CH232510A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2476259A (en) * | 1946-03-08 | 1949-07-12 | Ciba Ltd | Disazo dye from dihydroxy benzidine and process therefor |
US2476261A (en) * | 1946-04-11 | 1949-07-12 | Ciba Ltd | Process for the manufacture of asymmetrical polyazo-dyestuffs |
US2476260A (en) * | 1946-04-11 | 1949-07-12 | Ciba Ltd | Process for the manufacture of disazo-dyestuffs |
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