CH144485A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH144485A CH144485A CH144485DA CH144485A CH 144485 A CH144485 A CH 144485A CH 144485D A CH144485D A CH 144485DA CH 144485 A CH144485 A CH 144485A
- Authority
- CH
- Switzerland
- Prior art keywords
- sulfonic acid
- disazo dye
- preparation
- amino
- 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
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/02—Disazo dyes
- C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 142444. Verfahren zur Herstellung eines Disazofarbstoffes. Es wurde gefunden, dass man einen neuen Disazofarbstoff erhält, wenn man 1-Methyl- 4-aminobenzol-3-sulfosäure dianotiert, mit 1 - Amino-2-methoxynaphthalin-6-sulfosäure vereinigt, den erhaltenen Monoazofarbstoff dianotiert und mit 2-Amino-5-oxynaphthalin- 7-sulfosäure kuppelt.
Der neue Disazofarbstoff färbt Baumwolle und die Kunstseiden aus regenerierter Zellu lose, insbesondere Viskosekunstseide, in blauen Tönen.
<I>Beispiel:</I> Die aus 18,7 Teilen 1-Methyl-4-amino- benzol-3-sulfosäure bereitete Diazolösung wird bis zum Verschwinden der mineral sauren Reaktion mit Natriumacetat versetzt und mit einer neutralen Lösung von 25,3 Teilen 1.-Amino-2-methoxynaphthalin-6-sul- fosäure vereinigt.
Der gebildete Monoazo- farbstoff wird durch Zugabe von Soda in der Wärme in Lösung gebracht, hierauf als Na triumsalz durch Kochsalz ausgesalzen und abfiltriert. Der wieder gelöste Farbstoff wird bei 10 mit 6,9 Teilen Natriumnitrit und hierauf mit 30 Teilen 30 % iger Salz säure versetzt.
Die Diazolösung lässt man einfliessen in eine sodaalkalische Lösung von 23,9 Teilen 2-Amino-5-oxynaphthalin-7-sul- fosäure. Nach beendeter Kupplung wird der Farbstoff ausgesalzen und filtriert. Die zweite Kupplung kann auch bei Gegenwart von Pyridin vorgenommen werden.
Additional patent to main patent no. 142444. Process for the preparation of a disazo dye. It has been found that a new disazo dye is obtained if 1-methyl-4-aminobenzene-3-sulfonic acid is dianotated, combined with 1 - amino-2-methoxynaphthalene-6-sulfonic acid, the monoazo dye obtained is dianotized and 2-amino 5-oxynaphthalene-7-sulfonic acid couples.
The new disazo dye dyes cotton and artificial silk from regenerated cellulose, especially viscose artificial silk, in blue tones.
<I> Example: </I> The diazo solution prepared from 18.7 parts of 1-methyl-4-aminobenzene-3-sulfonic acid is treated with sodium acetate until the mineral acid reaction disappears and with a neutral solution of 25.3 Parts of 1.-amino-2-methoxynaphthalene-6-sulphonic acid combined.
The monoazo dye formed is brought into solution by adding hot soda, then salted out as sodium salt with sodium chloride and filtered off. The redissolved dye is added at 10 with 6.9 parts of sodium nitrite and then with 30 parts of 30% hydrochloric acid.
The diazo solution is allowed to flow into an alkaline soda solution of 23.9 parts of 2-amino-5-oxynaphthalene-7-sulphonic acid. When the coupling is complete, the dye is salted out and filtered. The second coupling can also be carried out in the presence of pyridine.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH142444T | 1929-02-02 | ||
CH144485T | 1929-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH144485A true CH144485A (en) | 1930-12-31 |
Family
ID=25714043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH144485D CH144485A (en) | 1929-02-02 | 1929-02-02 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH144485A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0851004A1 (en) * | 1996-12-24 | 1998-07-01 | Bayer Ag | Disazo dyestuffs for dyeing materials containing cellulose |
-
1929
- 1929-02-02 CH CH144485D patent/CH144485A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0851004A1 (en) * | 1996-12-24 | 1998-07-01 | Bayer Ag | Disazo dyestuffs for dyeing materials containing cellulose |
US6084078A (en) * | 1996-12-24 | 2000-07-04 | Bayer Aktiengesellschaft | Disazo dyestuffs for dyeing cellulosic materials |
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