CH127709A - Process for the preparation of a related azo dye. - Google Patents
Process for the preparation of a related azo dye.Info
- Publication number
- CH127709A CH127709A CH127709DA CH127709A CH 127709 A CH127709 A CH 127709A CH 127709D A CH127709D A CH 127709DA CH 127709 A CH127709 A CH 127709A
- Authority
- CH
- Switzerland
- Prior art keywords
- yellow
- acid
- soluble
- preparation
- aniline
- Prior art date
Links
Landscapes
- Coloring (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines beizenziehenden Azofarbstoffes. Es wurde gefunden, dass man einen wert vollen beizenfärbenden Azofarbstoff der Diphenylmethanreihe von der Art des im Flauptpatent beschriebenen erhält, wenn man die aus p-(co-Chlormethyl)-o-kresotinsäure und Anilin erhältliche Anilin-methylen-o- kresotinsäure von der Formel
EMI0001.0010
diazotiert und in alkalischer Lösung, statt mit 1-Naphtol-:
3.6-disulfosäure, hier mit 1-(2- Chlor- 5 -sulfophenyl)-.3 -methyl- 5 -pyrazolon kuppelt.
Der neue Farbstoff bildet ein gelbes Pulver, schwer löslich in kaltem Wasser, leicht in heissem mit grünlichgelber Farbe, löslich in konzentrierter Schwefelsäure mit gelber Farbe. Er färbt Wolle aus essigsaurem Bad in grünlichgelben Tönen, echt gegen Säure.
Diese Färbung wird durch Nach chromieren nur wenig nach gelb verändert. <I>Beispiel:</I> Eine 6,9 Gewichtsteilen Natriumnitrit entsprechende Menge Anilin-methylen-o-kre- sotinsäure obiger Formel wird in salzsaurer Lösung diazotiert und in Sodalösung ge kuppelt mit dem Natriumsalz von 2,8,8 Ge wichtsteilen 1-(2-Chlor-5-sulfophenyl)-3-me- thyl-5-pyrazolon. Man rührt 24 .Stunden, er wärmt, salzt aus,
filtriert und trocknet.
Process for the preparation of a related azo dye. It has been found that a valuable stain-dyeing azo dye of the diphenylmethane series of the type described in the Flaupt patent is obtained if the aniline-methylene-o-cresotinic acid obtainable from p- (co-chloromethyl) -o-cresotinic acid and aniline of the formula
EMI0001.0010
diazotized and in alkaline solution instead of 1-naphthol:
3.6-disulfonic acid, here with 1- (2-chloro-5-sulfophenyl) -3-methyl-5-pyrazolone.
The new dye forms a yellow powder, sparingly soluble in cold water, slightly soluble in hot water with a greenish yellow color, soluble in concentrated sulfuric acid with a yellow color. It dyes wool from an acetic acid bath in greenish-yellow tones, real against acid.
This color is only slightly changed to yellow by chroming. <I> Example: </I> An amount of aniline-methylene-o-kesotinic acid of the above formula corresponding to 6.9 parts by weight of sodium nitrite is diazotized in hydrochloric acid solution and coupled with the sodium salt of 2.8.8 parts by weight 1 in soda solution - (2-chloro-5-sulfophenyl) -3-methyl-5-pyrazolone. It is stirred for 24 hours, it warms up, salted out
filtered and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE127709X | 1926-01-28 | ||
CH124762T | 1927-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH127709A true CH127709A (en) | 1928-09-17 |
Family
ID=25710303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH127709D CH127709A (en) | 1926-01-28 | 1927-01-24 | Process for the preparation of a related azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH127709A (en) |
-
1927
- 1927-01-24 CH CH127709D patent/CH127709A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH135962A (en) | Process for the preparation of a monoazo dye. | |
CH127709A (en) | Process for the preparation of a related azo dye. | |
CH167047A (en) | Process for the production of a metal-containing dye. | |
AT82760B (en) | Method for the preparation of stain-coloring leukotriarylmethanazo dyes. | |
CH199371A (en) | Process for the preparation of an azo dye. | |
CH199368A (en) | Process for the preparation of an azo dye. | |
CH121711A (en) | Process for the preparation of an azo dye. | |
CH121714A (en) | Process for the preparation of a disazo dye. | |
CH363747A (en) | Process for the production of metal-containing azo dyes | |
CH117270A (en) | Process for the production of a new dye. | |
CH191739A (en) | Process for the preparation of an azo dye. | |
CH192049A (en) | Process for the production of a new azo dye. | |
CH119895A (en) | Process for the production of a new dye. | |
CH129482A (en) | Process for the production of a new azo dye. | |
CH190900A (en) | Process for the preparation of a metal-containing nitro-disazo dye. | |
CH192044A (en) | Process for the production of a new azo dye. | |
CH197279A (en) | Process for the preparation of an azo dye. | |
CH287868A (en) | Process for the preparation of a trisazo dye. | |
CH107521A (en) | Process for the production of a new azo dye. | |
CH184881A (en) | Process for the production of a new copper-containing azo dye. | |
CH199370A (en) | Process for the preparation of an azo dye. | |
CH131254A (en) | Process for the production of a new azo dye. | |
CH183877A (en) | Process for the preparation of an azo dye. | |
CH192042A (en) | Process for the production of a new azo dye. | |
CH199369A (en) | Process for the preparation of an azo dye. |