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CH192984A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH192984A
CH192984A CH192984DA CH192984A CH 192984 A CH192984 A CH 192984A CH 192984D A CH192984D A CH 192984DA CH 192984 A CH192984 A CH 192984A
Authority
CH
Switzerland
Prior art keywords
azo dye
production
new
new azo
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ici Ltd filed Critical Ici Ltd
Publication of CH192984A publication Critical patent/CH192984A/en

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Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Gemäss der vorliegenden Erfindung erhält  man einen neuen     Azofarbstoff    durch Kuppeln  von     diazotiertem        p-Dodecylanilin    mit     2-N-ss-          hydroxyätbyl-N        -n-butyryl-amin    -8-     naphtol-6-          sulfonsäure    in einem wässerigen alkalischen  Medium.  



  <I>Beispiel:</I>  26,1 Teile     p-Dodecylanilin    werden in       einem    Gemisch von 200 Teilen Wasser und  100 Teilen     l0o/oiger    Salzsäure suspendiert  und bei 5-10o C durch Zusetzen von 6,9  Teilen     Natriumnitrit        diazotiert.    Die so er  haltene Lösung der     Diazoverbindung-    wird  einer eiskalten Lösung von 37,5 Teilen des       Natriumsalzes    der     2-N-ss-hydroxyäthyl-N-n-          butyt#yl-amin-8-naphtol-6-sulfonsäure    und 21  Teilen wasserfreiem     Natriumkarbonat    in 400  Teilen Wasser zugesetzt.

   Der so gebildete  neue     Farbstoff    wird     abfiltriert,    mit ein wenig  schwachem Salzwasser gewaschen und ge  trocknet. Der neue Farbstoff trocknet zu  einem dunkelbraunen Pulver, welches sich im  heissen Wasser zu einer rötlich braunen und    in konzentrierter Schwefelsäure zu einer     kar          moisiuroten    Lösung löst. Er färbt Wolle in  rötlich braunen Tönen von sehr guter Halt  barkeit beim Walken.



  Process for the production of a new azo dye. According to the present invention, a new azo dye is obtained by coupling diazotized p-dodecylaniline with 2-N-β-hydroxyethyl-N-n-butyryl-amine -8-naphthol-6-sulfonic acid in an aqueous alkaline medium.



  <I> Example: </I> 26.1 parts of p-dodecylaniline are suspended in a mixture of 200 parts of water and 100 parts of 10% hydrochloric acid and diazotized at 5-10 ° C. by adding 6.9 parts of sodium nitrite. The so he obtained solution of the diazo compound is an ice-cold solution of 37.5 parts of the sodium salt of 2-N-ss-hydroxyethyl-Nn-butyt # yl-amine-8-naphthol-6-sulfonic acid and 21 parts of anhydrous sodium carbonate in 400 Parts of water added.

   The new dye thus formed is filtered off, washed with a little weak salt water and dried. The new dye dries to a dark brown powder, which dissolves in hot water to a reddish brown and in concentrated sulfuric acid to a caramelized solution. It dyes wool in reddish brown shades that are very durable when fulled.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes p-Dodecylanilin mit 2-N-ss- hydroxyäthyl - N- n-b utyryl-ami n-8 -naphtol-6- sulfonsäure in einem wässerigen alkalischen Medium kuppelt. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that diazotized p-dodecylaniline is coupled with 2-N-β-hydroxyethyl-N-n-butyryl-amine n-8-naphthol-6-sulfonic acid in an aqueous alkaline medium. Der neue Farbstoff ist ein dunkelbraunes Pulver, welches sich in warmem Wasser zu einer rötlich braunen Lösung und in konzen trierter Schwefelsäure zu einer karmoisin- roten Lösung löst. Er färbt Wolle in rötlich braunen Tönen von sehr guter Haltbarkeit im Walken. The new dye is a dark brown powder which dissolves in warm water to form a reddish brown solution and in concentrated sulfuric acid to form a crimson-red solution. It dyes wool in reddish brown tones that are very durable in fulling.
CH192984D 1935-08-30 1936-08-14 Process for the production of a new azo dye. CH192984A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB192984X 1935-08-30
CH189409T 1936-08-14

Publications (1)

Publication Number Publication Date
CH192984A true CH192984A (en) 1937-09-15

Family

ID=25721788

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192984D CH192984A (en) 1935-08-30 1936-08-14 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH192984A (en)

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