CH140010A - Process for the preparation of a strongly basic azo dye. - Google Patents

Process for the preparation of a strongly basic azo dye.

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Publication number
CH140010A
CH140010A CH140010DA CH140010A CH 140010 A CH140010 A CH 140010A CH 140010D A CH140010D A CH 140010DA CH 140010 A CH140010 A CH 140010A
Authority
CH
Switzerland
Prior art keywords
strongly basic
azo dye
preparation
basic azo
dye
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH140010A publication Critical patent/CH140010A/en

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Description

  

  Verfahren zur Darstellung eines stark basischen     Azofarbstoffes.       Es wurde     (yefunden.    dass ein     wertvoller,     stark basischer Farbstoff entsteht, wenn man  die     Diazoverbindung    des Anilins mit     Pyrid-          acetyl-2    .     7-aminonap$tol     
EMI0001.0008     
         kombiniert.     <I>Beispiel:</I>  9,3 kg     Anilin    werden in üblicher Weise       diazotiert;

      die     Diazolösung    wird mit     Natrium-          acetat    abgestumpft und einlaufen gelassen in  eine     Lösung    von 32 kg     Pyridacetyl-2.7-          aminonaphto.1    in 800 Liter Wasser, 2     Liter          Eisessig    und 15 kg     Natriumacetat.    Der  Farbstoff fällt mit hellroter Farbe vollkom  men     aus;    er wird     filltriert        und:    getrocknet.

    Er stellt     ein    hellrotes Pulver dar, in essig  saurem Wasser leicht löslich mit orangeroter,       in        ,konzentrierter    Schwefelsäure mit bllau-    roter Farbe. Er färbt tannierte Baumwolle  und Seide in reinen     orangeroten    Tönen an  von     ausgezeichneter    Wasch- und guter  Lichtechtheit. Die     Färbungen    sind rein weiss       ätzbar.  



  Process for the preparation of a strongly basic azo dye. It has been found that a valuable, strongly basic dye is formed when the diazo compound of aniline is mixed with pyridacetyl-2,7-aminonapotol
EMI0001.0008
         combined. <I> Example: </I> 9.3 kg of aniline are diazotized in the usual way;

      the diazo solution is blunted with sodium acetate and allowed to run into a solution of 32 kg of pyridacetyl-2.7-aminonaphto.1 in 800 liters of water, 2 liters of glacial acetic acid and 15 kg of sodium acetate. The dye falls out completely men with a light red color; it is filtered and: dried.

    It is a light red powder, easily soluble in acidic water with orange-red, in, concentrated sulfuric acid with a blue-red color. It dyes tannic cotton and silk in pure orange-red shades of excellent washfastness and good lightfastness. The colors can be etched in pure white.

Claims (1)

PATENTANSPRUCH: Verfahren. zur Darstellung eines stark basischen Azofarbstoffes, dadurch \gekenn- zeichnet, dass mau die Diazoverbindung des Anilins mit Pyridacetyl-2.7-aminonal)htol kombiniert. Der Farbstoff stellt ein hell rotes Pulver dar, leicht löslich in essigsaurem Wasser mit orangeroter Farbe, in konzen trierter Schwefeilsäure mit blauroter Farbe. PATENT CLAIM: Process. for the representation of a strongly basic azo dye, characterized in that the diazo compound of aniline is combined with pyridacetyl-2,7-aminonal) htol. The dye is a light red powder, easily soluble in acetic acid water with an orange-red color, in concentrated sulfuric acid with a blue-red color. Seine Färbungen auf tannierter Baumwolle und Seide sind ausgezeichnet wasch- und lichtecht, und lassen sich rein weiss ätzen. His dyeings on tanned cotton and silk are extremely washable and lightfast, and can be etched in pure white.
CH140010D 1927-08-06 1928-07-28 Process for the preparation of a strongly basic azo dye. CH140010A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE140010X 1927-08-06
CH137468T 1928-07-28

Publications (1)

Publication Number Publication Date
CH140010A true CH140010A (en) 1930-05-15

Family

ID=25712986

Family Applications (1)

Application Number Title Priority Date Filing Date
CH140010D CH140010A (en) 1927-08-06 1928-07-28 Process for the preparation of a strongly basic azo dye.

Country Status (1)

Country Link
CH (1) CH140010A (en)

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