CH143592A - Process for the preparation of a stain-coloring disazo dye. - Google Patents
Process for the preparation of a stain-coloring disazo dye.Info
- Publication number
- CH143592A CH143592A CH143592DA CH143592A CH 143592 A CH143592 A CH 143592A CH 143592D A CH143592D A CH 143592DA CH 143592 A CH143592 A CH 143592A
- Authority
- CH
- Switzerland
- Prior art keywords
- parts
- stain
- preparation
- coloring
- brown
- Prior art date
Links
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
Verfahren zur Darstellung eines beizentärbenden Disazofarbstoffes. Es wurde gefunden, dass man einen wert vollen,beizenfärbenden Disazofarbstoff erhält, wenn man 2-Aminonaphtalin-6,8-disulfosäure diazotiert, mit 1-Amino-6-methoxy-3-m,ethyl- henzol kombiniert, erneut diazotiert und mit 1-Oxybenzol-2-ca.rbonsä,ure kuppelt.
<I>Beispiel:</I> 30,3 Teile 2-Aminonaphta.lin-6,8-disulfo- säure in 10%iger Anschlämmung werden nach Zusatz von 12 Teilen Salzsäure 30%ig mit 6,9 Teilen Natriumnitrit diazotiert. rn die mit Eis versetzte Diazolösung fliesst eine Lösung von 13,
8 Teilen 1-Amino-6- methoxy-3-methylbenzol in 150 Teilen Was ser und 12 Teilen Salzsäure 30%ig". Die Kupplungsmasse wird mit Natronlauge neu tral gestellt und nach Zusatz von 6,9 Teilen Natriumnitrit in 35 Teilen Salzsäure 30 % ig, verdünnt mit 200 Teilen Wasser, bei 15 einlaufen gelassen. Die Diazoverbindung wird mit Kochsalz ausgefällt und gepresst.
Der Presskuchen wird darauf mit 150 Teilen @4 asser und<B>150</B> Teilen Eis angeteigt, mit 14 Teilen 1-Oxybenzol-2-carbonsäure als Na- tronsalz versetzt und 30 Teile l\atronlauge 20%ig langsam zufliessen gelassen. Nach beendeter Kupplung wird mit 10 Teilen Es sigsäure 80%ig neutralisiert und der Farb stoff mit Kochsalz gefällt.
Der Farbstoff bildet ein . r ötlichbraunes Pulver, löslich in Wasser mit gelbbrauner. in konz. Schwefelsäure mit blauer Farbe. Er erzeugt im Chromdruck ein Braun von grosser Seifen-,Wasch- und Lichtechtheit.
Process for the preparation of a disazo dye to be stained. It has been found that a valuable, stain-dyeing disazo dye is obtained if 2-aminonaphthalene-6,8-disulfonic acid is diazotized, combined with 1-amino-6-methoxy-3-m, ethylhenzene, diazotized again and with 1 -Oxybenzene-2-carbonic acid couples.
<I> Example: </I> 30.3 parts of 2-aminonaphta.lin-6,8-disulfonic acid in a 10% suspension are diazotized with 6.9 parts of sodium nitrite after addition of 12 parts of 30% hydrochloric acid. rn the diazo solution mixed with ice flows a solution of 13,
8 parts of 1-amino-6-methoxy-3-methylbenzene in 150 parts of water and 12 parts of 30% hydrochloric acid. The coupling compound is neutralized with sodium hydroxide solution and, after addition of 6.9 parts of sodium nitrite in 35 parts of 30% hydrochloric acid ig, diluted with 200 parts of water, allowed to run in at 15. The diazo compound is precipitated with common salt and pressed.
The press cake is then made into a paste with 150 parts of water and 150 parts of ice, 14 parts of 1-oxybenzene-2-carboxylic acid as sodium salt are added and 30 parts of 20% sodium hydroxide solution are allowed to slowly flow in . After the coupling is complete, it is neutralized with 10 parts of 80% acetic acid and the dye is precipitated with sodium chloride.
The dye forms a. reddish brown powder, soluble in water with yellowish brown. in conc. Sulfuric acid of blue color. With chrome printing, it creates a brown that is extremely fast to soap, washing and light.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE143592X | 1928-02-20 | ||
| CH141877T | 1929-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH143592A true CH143592A (en) | 1930-11-15 |
Family
ID=25713946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH143592D CH143592A (en) | 1928-02-20 | 1929-02-18 | Process for the preparation of a stain-coloring disazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH143592A (en) |
-
1929
- 1929-02-18 CH CH143592D patent/CH143592A/en unknown
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