CH284416A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH284416A CH284416A CH284416DA CH284416A CH 284416 A CH284416 A CH 284416A CH 284416D A CH284416D A CH 284416DA CH 284416 A CH284416 A CH 284416A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- dye
- amino
- disazo dye
- red
- 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
Verfahren zur Herstellung eines Disazofarbstoffes. (legenstancl des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Disazo- farbstoffes, welches dadureh gekennzeichnet ist, dass man den chtreh Kuppeln der Diazo- verbindung aus 1 1 o1 2--zlminobenzol-7.-ear- bonsäure mit 1 --Hol 2-(3'---#letliyl-1'-aminoben- zoyl)
-aniino-5-oxynaplithalin-7-stllfonsäure er- li < iltli(#lien Aminoazofarbstoff dianotiert Lind die l)iazo-azoverbiizdung mit. 1. llol 2-Benzoyl- ainino-5-ozy-naplitlialin.-7-stilfonsäure kuppelt.
Beispiel: I )ei- Aniinoazofa.rlistoff, den nian durch Kup peln von 1\.3,7 'feilen dianotierter 2-Aminoben- zol-l-ear1)onsäure mit 37,2 Teilen 2-( -h@ethyl- 9.'-a ni in oli enzov 1)
-amiiio-5-oxynaplithalin-7-siil- fonsäure in natriumearbonat-alkalischem lle- diiuii ei hiill, wird in 400 'feilen Wasser an- die Lösung mit 7 Teilen Natrium nitrit versetzt und auf 8 gekühlt. Bei dieser Tenipei-atur gibt man .der Lösung 30 Teile konzentrierte Salzsäure zu und rührt sie wäh rend ungefähr 2 Stunden, worauf die Diazo- tierun,-- beendi;t ist.
Die erhaltene Diazo- suspension lässt man bei 5 bis 10 zu einer Lösung von 31,5 Teilen 2-Benzoyl.amino-5-oxy- naphtlialin-7-sulfons < äure und -10 Teilen Na triumearbonat in 500 Teilen Wasser laufen.
Die Kupplung zum Disazofarbstoff erfolgt sehr rasch; nach 2 Stunden wird die Reak tionsmasse auf 70 erwärmt, der in Lösung -egangene Farbstoff mit 50 Teilen Natrium- cblorid ausgesalzt, der entstandene Nieder schlag filtriert und bei 90 im Vakuum ge trocknet.
Der neue Parbstoi'f ist ein rotes Pulver, welches sich in Wasser mit roter Farbe löst und Baumwolle und Fasern aus regenerierter Celltilose in roten Tönen färbt, welche durch Nachbehandeln mit Kupfersalzen wasch- und liehteclit werden.
Process for the preparation of a disazo dye. (The legend of the present patent is a process for the production of a disazo dye, which is characterized by the fact that the reverse coupling of the diazo compound from 1 1 o1 2-zlminobenzene-7-earboxylic acid with 1 -hol 2 - (3 '--- # letliyl-1'-aminoben- zoyl)
-aniino-5-oxynaplithalin-7-stylfonic acid achieves li <iltli (#lien aminoazo dye dianotates and the l) iazo-azo connection with. 1. llol 2-benzoyl-ainino-5-ozy-naplitlialin.-7-stilfonic acid couples.
Example: I) ei- Aniinoazofa.rlistoff, the nian by coupling 1 \ .3.7 'files dianotized 2-aminobenzene-1-ear1) onic acid with 37.2 parts 2- (-h @ ethyl- 9 .'- a ni in oli enzov 1)
-amiiio-5-oxynaplithalin-7-silphonic acid in sodium carbonate-alkaline lle-diiuii egg shell, the solution is mixed with 7 parts of sodium nitrite in 400% water and cooled to 8. At this point, 30 parts of concentrated hydrochloric acid are added to the solution and the mixture is stirred for about 2 hours, whereupon the diazotization is over.
The diazo suspension obtained is allowed to run at 5 to 10 into a solution of 31.5 parts of 2-benzoylamino-5-oxynaphthalene-7-sulfonic acid and -10 parts of sodium carbonate in 500 parts of water.
The coupling to the disazo dye takes place very quickly; After 2 hours, the reaction mass is heated to 70, the dyestuff which has gone into solution is salted out with 50 parts of sodium chloride, and the resulting precipitate is filtered and dried at 90 in a vacuum.
The new Parbstoi'f is a red powder that dissolves in water with a red color and dyes cotton and fibers from regenerated Celltilose in red tones, which can be washed and lenteclit by post-treatment with copper salts.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH284416T | 1950-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH284416A true CH284416A (en) | 1952-07-31 |
Family
ID=4484524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH284416D CH284416A (en) | 1950-06-27 | 1950-06-27 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH284416A (en) |
-
1950
- 1950-06-27 CH CH284416D patent/CH284416A/en unknown
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