CH118621A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH118621A
CH118621A CH118621DA CH118621A CH 118621 A CH118621 A CH 118621A CH 118621D A CH118621D A CH 118621DA CH 118621 A CH118621 A CH 118621A
Authority
CH
Switzerland
Prior art keywords
dye
oxyazo
preparation
sulfonic acid
diazoxyd
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH118621A publication Critical patent/CH118621A/en

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Description

  

  Verfahren zur Darstellung eines     o-Oxyazöfarbstoffes.       Im Hauptpatent ist die Darstellung eines       o-Oxyazofarbstoffes    aus     diazotierter        2-Amino-          4-nitro-l-oxybenzol-G-sulfosäure    und     1-p-          Naphthyl-3-niethyl-5-py        razolon    beschrieben.

   Es  wurde nun gefunden, dass durch Kuppeln der  aus     Naphth        ali        n-1.2-diazoxyd-4-s    u     lfosäure    durch  Nitrieren gewonnenen     Nitronaphthalin-1.2-          diazoxyd-4-sulfosäure    (vergleiche deutsche  Patentschrift Nr. 164665) mit     1-u-Naphthyl-3-          inethyl-5-pyrazolon    ebenfalls ein wertvoller       Farbstoff    entsteht, dessen Chromlack auf  Wolle bordeauxrot ist und sich durch Licht  echtheit auszeichnet.  



       Beispiel     Eine     Aufschlemmung    von 22,6 Teilen       1-a-Naphtnyl-3-methyl-5-pyrazolon    in der zehn  fachen Menge Wasser mischt man mit 29,5  Teilen Nitronaphthalin-1.2-diazoxyd-4-sulfo-    säure (D. R. P. Nr. 164665) und gibt unter  Rühren 10 Teile wasserfreies Natriumkarbonat  in 10      /oiger    Lösung zu. Der     Farbstoff    bildet  sich in kurzer Zeit und scheidet sich zum  grössten Teil aus.



  Process for the preparation of an o-oxyazo dye. The main patent describes the preparation of an o-oxyazo dye from diazotized 2-amino-4-nitro-1-oxybenzene-G-sulfonic acid and 1-p-naphthyl-3-niethyl-5-py razolone.

   It has now been found that by coupling the n-1,2-diazoxyd-4-sulfonic acid obtained by nitration from naphthalene-1,2-diazoxyd-4-sulfonic acid (cf. German Patent No. 164665) with 1-u-naphthyl-3 - Inethyl-5-pyrazolon, a valuable dye is also created, the chrome lacquer of which is burgundy on wool and is characterized by its lightfastness.



       EXAMPLE A slurry of 22.6 parts of 1-a-naphthyl-3-methyl-5-pyrazolone in ten times the amount of water is mixed with 29.5 parts of nitronaphthalene-1,2-diazoxyd-4-sulfonic acid (DRP No. 164665 ) and add 10 parts of anhydrous sodium carbonate in 10% solution with stirring. The dye is formed in a short time and is largely eliminated.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxyazo- farbstoffes, der Wolle im Verein mit Chrom beizen lichtecht bordeauxrot färbt, dadurch gekennzeichnet, dass man. die durch Nitrieren von Naphthalin-1.2-diazoxyd-4-sulfosäure er hältliche -i#'itronaphthalin-1.2-diazoxyd-4-sulfo- säure mit 1-a-Naphthyl-3-methyl-5-pyrazolon kuppelt. PATENT CLAIM: Process for the preparation of an o-oxyazo dye which dyes wool in combination with staining chrome light-fast burgundy red, characterized in that one. the -i # 'itronaphthalene-1.2-diazoxyd-4-sulfonic acid, obtainable by nitrating naphthalene-1,2-diazoxyd-4-sulfonic acid, couples with 1-a-naphthyl-3-methyl-5-pyrazolone.
CH118621D 1924-04-19 1925-04-18 Process for the preparation of an o-oxyazo dye. CH118621A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE118621X 1924-04-19
CH115939T 1925-05-18

Publications (1)

Publication Number Publication Date
CH118621A true CH118621A (en) 1927-01-17

Family

ID=25708616

Family Applications (1)

Application Number Title Priority Date Filing Date
CH118621D CH118621A (en) 1924-04-19 1925-04-18 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH118621A (en)

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