CH140003A - Process for the preparation of a yellow monoazo dye. - Google Patents
Process for the preparation of a yellow monoazo dye.Info
- Publication number
- CH140003A CH140003A CH140003DA CH140003A CH 140003 A CH140003 A CH 140003A CH 140003D A CH140003D A CH 140003DA CH 140003 A CH140003 A CH 140003A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- yellow
- monoazo dye
- dye
- yellow monoazo
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines gelben Monoazofarbstoffes. Gegenstand dieser Anmeldung ist ein Verfahren zur Darstellung des Azofarb- stoffes:
EMI0001.0004
1-Amino-2-methylbenzol-5-sulfosäure <SEP> --> <SEP> 1-(2'-Chlor-5'-sulfophenyl)-3-methyl-5-pyrazolorr, welches dadurch gekennzeichnet ist, dass man diazotierte 1-Amino-2-methylbenzol-5-sulfo- säure mit 1-(2'-Chlor-5'-sulfophenyl)-3-me- thyl-5-pyrazolon kuppelt.
<I>Beispiel</I> 288,5 Gewichtsteile 1-(2'-Chlor-5'-sulfo- phenyl)-3-methyl-5-pyrazolon werden in un gefähr 1000 Gewichtsteilen Wasser und 212 Gewichtsteilen Soda gelöst. Dazu lässt man eine in bekannter Weise aus 187 Gewichts teilen 1-Amino-2-methylbenzol-5-sulfosäure erhaltene Diazolösung langsam einlaufen.
-Nach beendeter Kupplung wind der Farb stoff durch wenig Kochsalz zur Abseheidung gebracht; er stellt nach dem Absaugen und Trocknen ein gelbes Pulver dar, welches bei spielender Löslichkeit auch in kalkhaltigem Wasser Wolle in grünstichig gelbem Farb- ton anfärbt. Die Färbung zeichnet sich durch hervorragende Lichtechtheit, sehr gute Ega lität und Wasserechtheit aus.
Process for the preparation of a yellow monoazo dye. The subject of this application is a process for the preparation of the azo dye:
EMI0001.0004
1-Amino-2-methylbenzene-5-sulfonic acid <SEP> -> <SEP> 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolorr, which is characterized in that it is diazotized 1-Amino-2-methylbenzene-5-sulfonic acid couples with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone.
<I> Example </I> 288.5 parts by weight of 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone are dissolved in approximately 1000 parts by weight of water and 212 parts by weight of soda. For this purpose, a diazo solution obtained in a known manner from 187 parts by weight of 1-amino-2-methylbenzene-5-sulfonic acid is slowly run in.
-After the coupling is complete, the dye is caused to separate by a little common salt; After vacuuming and drying it turns out to be a yellow powder which, with its solubility at play, also dyes wool in a greenish yellow shade in hard water. The dyeing is characterized by excellent lightfastness, very good Ega quality and waterfastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE140003X | 1927-05-10 | ||
CH136648T | 1928-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH140003A true CH140003A (en) | 1930-05-15 |
Family
ID=25712759
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH140003D CH140003A (en) | 1927-05-10 | 1928-05-07 | Process for the preparation of a yellow monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH140003A (en) |
-
1928
- 1928-05-07 CH CH140003D patent/CH140003A/en unknown
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