CH136040A - Process for the preparation of a new dye intermediate. - Google Patents
Process for the preparation of a new dye intermediate.Info
- Publication number
- CH136040A CH136040A CH136040DA CH136040A CH 136040 A CH136040 A CH 136040A CH 136040D A CH136040D A CH 136040DA CH 136040 A CH136040 A CH 136040A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- sulfonic acid
- azine
- amino
- dye intermediate
- 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
- C09B17/00—Azine dyes
- C09B17/04—Azine dyes of the naphthalene series
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines neuen Farbstoff-Zwisehenproduktes. Es wurde gefunden, dass es gelingt ein Azin, weiches sich von der 2-Amino-5-oxy- rraphthalin-7-sulfosäur e ableitet, in guten Aus beuten zu erhalten, wenn man die 2-Amino- 5 - oxyriaphthalin - 7 - sulfosäure an der OH- Gruppe verestert, nach der Veresterung durch Behandeln mit Oxydationsmitteln das Azin darstellt und nachher den Ester verseift.
Das entstandene Produkt, wahrscheinlich ein 5,5'-Dioxy-7,7'-disulfo-1,2,2',1'-dinaphtlra- zin der Formel
EMI0001.0015
welches in verdünnten Säuren und Wasser mit gelber, in verdünnten Alkalien mit roter und in konzentrierter Schwefelsäure mit grüner Farbe löslich ist, soll zur Herstellung von Farbstoffen Verwendung finde . <I>Beispiel:</I> Man löst 239 Teile 2-Amirro-5-oxyrraplr- thalin-7-sulfosäure in 300 Teilen 30 gewichts prozentiger Natronlauge und 700 Teilen Wasser, fügt 224 Teile p-Toluolsulfochlorid zu und erwärmt solange auf 95 C, bis letz teres verschwunden ist.
Jetzt wird auf 18 0 C abgekühlt und mit einer Alkalihypochlorit- lösung, entsprechend 105-130 Teile aktivem Chlor, versetzt und durch Eiszugabe die Temperatur auf 20-25 C reguliert. Es scheidet sich der Di-p-tolrrolsulfoester des 5,5' - Dioxy-7, 7'- di s ulfo-1,2,2',1'-dinaphthazirrs als ein gelber, kristalliner Körper ab, den man wie üblich isoliert.
Durch Verseifen mit 1000 Teilen 5 % iger Natronlauge bei Siede- temperatur wird das entsprechende Dioxy- disulfoazin erhalten. An Stelle von Alkalihypoclrlorit können auch andere Oxydationsmittel angewendet werden.
Process for the preparation of a new dye intermediate product. It has been found that an azine, which is derived from the 2-amino-5-oxyrraphthalene-7-sulfonic acid e, can be obtained in good yield if the 2-amino-5-oxyriaphthalene-7 - sulfonic acid esterified at the OH group, after esterification it is the azine by treatment with oxidizing agents and then the ester is saponified.
The resulting product, probably a 5,5'-dioxy-7,7'-disulfo-1,2,2 ', 1'-dinaphthrazine of the formula
EMI0001.0015
which is soluble in dilute acids and water with yellow, in dilute alkalis with red and in concentrated sulfuric acid with green, is to find use for the production of dyes. <I> Example: </I> 239 parts of 2-amirro-5-oxyrraplr-thalin-7-sulfonic acid are dissolved in 300 parts of 30 percent strength by weight sodium hydroxide solution and 700 parts of water, 224 parts of p-toluenesulfonyl chloride are added and the mixture is heated to 95 C until the latter is gone.
It is then cooled to 18 ° C. and an alkali hypochlorite solution, corresponding to 105-130 parts of active chlorine, is added and the temperature is regulated to 20-25 ° C. by adding ice. The di-p-tolrolsulfoester of 5,5'-dioxy-7,7'-di sulfo-1,2,2 ', 1'-dinaphthazirrs separates out as a yellow, crystalline body which is isolated as usual .
The corresponding dioxydisulfoazine is obtained by saponifying with 1000 parts of 5% strength sodium hydroxide solution at the boiling point. Instead of alkali hypochlorite, other oxidizing agents can also be used.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH136040T | 1928-09-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH136040A true CH136040A (en) | 1929-10-31 |
Family
ID=4393815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH136040D CH136040A (en) | 1928-09-08 | 1928-09-08 | Process for the preparation of a new dye intermediate. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH136040A (en) |
-
1928
- 1928-09-08 CH CH136040D patent/CH136040A/en unknown
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