CH300451A - Process for the preparation of an acidic monoazo dye. - Google Patents
Process for the preparation of an acidic monoazo dye.Info
- Publication number
- CH300451A CH300451A CH300451DA CH300451A CH 300451 A CH300451 A CH 300451A CH 300451D A CH300451D A CH 300451DA CH 300451 A CH300451 A CH 300451A
- Authority
- CH
- Switzerland
- Prior art keywords
- monoazo dye
- preparation
- medium
- sulfonic acid
- parts
- 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)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines sauren Monoazofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines sauren Monoazofarbstoffes, welches darin besteht, dass man 1 Mol der Diazoverbindung aus 1-Amino- benzol- 2 - sulfonsäure mit 1 Mol 1- Oxy-6- decanoylaminonaphthalin-3-sulfonsäure kup pelt.
Im nachfolgenden Beispiel bedeuten die Teile Gewichtsteile.
<I>Beispiel:</I> 17,3 Teile 1-Aminobenzol- 2 - sulfonsäure werden in 50 Teilen kaltem Wasser und 100 Teilen normaler Natriumhydroxydlösung ge löst und mit einer Lösung von 7 Teilen Na triumnitrit in 50 Teilen Wasser versetzt. Durch Zugabe von Eis wird die Temperatur auf 5 bis<B>10'</B> gebracht. Man giesst hierauf unter Rühren 30 Teile konzentrierte Salzsäure auf einmal zu und rührt bei 10 bis 15'1 bis die salpetrige Säure verschwunden ist. Hierbei scheidet sich die Diazoverbindung zum Teil aus.
Die Suspension der Diazoverbindung wird mit der wässrigen Suspension von 41,4 Teilen des Natriumsalzes der 1- Oxy- 6 - decanoyl- aminonaphthalin-3-sulfonsäure in 1200 Teilen Wasser in Gegenwart von 20 Teilen Natrium- bicarbonat bei 10 bis<B>15'</B> vereinigt. Nach be endeter Kupplung wird der ausgeschiedene neue Farbstoff filtriert und getrocknet.
Er ist ein orangefarbenes Pulver, das sich in heissem Wasser mit oranger Farbe löst und Wolle, Seide und Polyamidfasern in lebhaften orangen Tönen von guter Wasch- imd Schweiss echtheit und sehr guter Lichtechtheit färbt.
Process for the preparation of an acidic monoazo dye. The present patent relates to a process for the preparation of an acidic monoazo dye, which consists in that 1 mol of the diazo compound from 1-amino-benzene-2-sulfonic acid is coupled with 1 mol of 1-oxy-6-decanoylaminonaphthalene-3-sulfonic acid.
In the following example, the parts are parts by weight.
<I> Example: </I> 17.3 parts of 1-aminobenzene-2-sulfonic acid are dissolved in 50 parts of cold water and 100 parts of normal sodium hydroxide solution, and a solution of 7 parts of sodium nitrite in 50 parts of water is added. The temperature is brought to 5 to <B> 10 '</B> by adding ice. 30 parts of concentrated hydrochloric acid are then poured in all at once, with stirring, and the mixture is stirred at 10 to 15 minutes until the nitrous acid has disappeared. The diazo compound is partially eliminated here.
The suspension of the diazo compound is mixed with the aqueous suspension of 41.4 parts of the sodium salt of 1- oxy- 6 - decanoyl-aminonaphthalene-3-sulfonic acid in 1200 parts of water in the presence of 20 parts of sodium bicarbonate at 10 to 15 ' United. After coupling has ended, the new dye which has separated out is filtered off and dried.
It is an orange powder that dissolves in hot water with an orange color and dyes wool, silk and polyamide fibers in lively orange tones with good fastness to washing and perspiration and very good fastness to light.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH300451T | 1951-08-28 | ||
CH297411T | 1951-11-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH300451A true CH300451A (en) | 1954-07-31 |
Family
ID=25733839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH300451D CH300451A (en) | 1951-08-28 | 1951-08-28 | Process for the preparation of an acidic monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH300451A (en) |
-
1951
- 1951-08-28 CH CH300451D patent/CH300451A/en unknown
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