CH192040A - Process for the production of a new azo dye. - Google Patents
Process for the production of a new azo dye.Info
- Publication number
- CH192040A CH192040A CH192040DA CH192040A CH 192040 A CH192040 A CH 192040A CH 192040D A CH192040D A CH 192040DA CH 192040 A CH192040 A CH 192040A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- production
- new azo
- new
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
- C09B29/28—Amino naphthols
- C09B29/30—Amino naphtholsulfonic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines neuen Azofarbstoffes. Es wurde gefunden, dass man einen neuen Azofarbstoff erhält, wenn man die Diazover- bindung des 1-Aminobenzol-2.4-diäthyldi- sulfons in saurer Lösung mit 1-Amino-5-oxy- riaphthalin-2-sulfonsäure vereinigt. Der neue Farbstoff bildet ein dunkles Pulver, das sich in Wasser mit blauer Farbe löst und Wolle aus saurem Bade in echten blauen Tönen färbt.
Beispiel: 277 Teile 1-Aminobenzol-2.4-diäthyldi- sulfon werden in verdünnter Essigsäure mit 250 Teilen Salzsäure vom spezifischen Ge wicht 1,15 verrührt und langsam mit einer konzentrierten Lösung von 69 Teilen Natrium nitrit versetzt. In diese durch Zusatz von Eis gekühlte Diazolösung lässt man eine neutra lisierte Lösung von 239 Teilen 1-Amino-5- oxynaphthalin-2-sulforisäure zutropfen. Die Farbstoffbildung kann durch Zusatz neutra- lisierender Mittel, wie z.
B. Natriumacetat oder Natriumformiat, beschleunigt werden. Man kann die Umsetzung auch bei mässig erhöhter Temperatur durchführen. Der ent standene Farbstoff wird abfiltriert, durch Lösen in heissem Wasser und Zugabe eines Alkalis, Aussalzen und Filtrieren und Trocknen isoliert.
Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the diazo compound of 1-aminobenzene-2,4-diethyl disulfone is combined in acidic solution with 1-amino-5-oxyriaphthalene-2-sulfonic acid. The new dye forms a dark powder that dissolves in water with a blue color and dyes wool from an acid bath in true blue tones.
Example: 277 parts of 1-aminobenzene-2,4-diethyl disulfone are stirred in dilute acetic acid with 250 parts of hydrochloric acid with a specific weight of 1.15, and a concentrated solution of 69 parts of sodium nitrite is slowly added. A neutralized solution of 239 parts of 1-amino-5-oxynaphthalene-2-sulforic acid is added dropwise to this diazo solution, which has been cooled by the addition of ice. The dye formation can be achieved by adding neutralizing agents, such as
B. sodium acetate or sodium formate, are accelerated. The reaction can also be carried out at a moderately elevated temperature. The resulting dye is filtered off, isolated by dissolving in hot water and adding an alkali, salting out and filtering and drying.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH190423T | 1935-09-07 | ||
CH192040T | 1935-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH192040A true CH192040A (en) | 1937-07-15 |
Family
ID=25721980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH192040D CH192040A (en) | 1935-09-07 | 1935-09-07 | Process for the production of a new azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH192040A (en) |
-
1935
- 1935-09-07 CH CH192040D patent/CH192040A/en unknown
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