CH302033A - Process for the preparation of a chromable disazo dye. - Google Patents

Process for the preparation of a chromable disazo dye.

Info

Publication number
CH302033A
CH302033A CH302033DA CH302033A CH 302033 A CH302033 A CH 302033A CH 302033D A CH302033D A CH 302033DA CH 302033 A CH302033 A CH 302033A
Authority
CH
Switzerland
Prior art keywords
disazo dye
chromable
acetylamino
preparation
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH302033A publication Critical patent/CH302033A/en

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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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/025—Disazo dyes containing acid groups, e.g. -COOH, -SO3H, -PO3H2, -OSO3H, -OPO2H2; Salts thereof

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 297842.    Verfahren zur     Herstellung    eines     ehromierbaren        Disazofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     chromier-          baren        Disazofarbstoffes,    welches darin besteht,

    dass man 1     Mol    der     Diazoverbindung    aus der  durch Kuppeln von     diazotierter        1-Aminonaph-          t.halin-5-sulfonsäure    mit     1-Oxy-2-acetylamino-          benzol    und anschliessendes Verseifen der     Ace-          tvjaminogruppe    erhältlichen     Aminomonoazo-          verbindung    mit 1     Mol        1-Acetylamino-7-oxy-          naphthalin    kuppelt.  



  Im nachfolgenden Beispiel bedeuten die  Teile Gewichtsteile.    <I>Beispiel:</I>  34,3 Teile der durch Kuppeln von     dia7o-          tierter        1-Aminonaphthalin-5-sulfonsäure    mit       1-Oxy-2-acetylaminobenzol    und anschliessendes  Verseifen der     Aeetylaminogruppe    erhältlichen       Aminomonoazov        erbindung    werden in 400 Tei  len Wasser und 4 Teilen     Natriumhydroxyd     gelöst. Man versetzt die Lösung mit 6,9 Tei  len     Natriumnitrit    und tropft sie in eine Mi  schung von 36 Teilen konzentrierter     Salzsäure     und 100 Teilen Eiswasser.

   Den so erhaltenen       Diazokörper    trägt man unter Eiskühlung in  eine Lösung von 20,1 Teilen 1-     Acetvjamino-          7-oxynaphthalin    und 14 Teilen Natrium  hydroxyd in 150 Teilen Wasser ein. Sobald  die Bildung des     Disazofarbstoffes    beendigt ist,    wird dieser mit     Natriumchlorid    aus der Kupp  lungsmasse abgeschieden,     abfiltriert    und ge  trocknet.  



  Der neue     chromierbare        Disazofarbstoff    ist  ein dunkles Pulver, das sich in verdünnter       Sodalösung    mit blaugrauer, in konzentrierter  Schwefelsäure mit blauer Farbe löst und Wolle       nachchromiert    und     metachrom    in olivgrünen  Tönen färbt. Die Färbungen besitzen eine gute  Licht- und     vorzügliche        Nassechtheiten.  



  <B> Additional patent </B> to main patent no. 297842. Process for the production of an honorable disazo dye. The subject of the present patent is a process for the production of a chromable disazo dye, which consists in

    that 1 mole of the diazo compound is obtained from the aminomonoazo compound obtainable by coupling diazotized 1-aminonaph- t.halin-5-sulfonic acid with 1-oxy-2-acetylamino-benzene and subsequent saponification of the acetylamino group with 1 mole of 1-acetylamino -7-oxynaphthalene coupling.



  In the following example, the parts are parts by weight. <I> Example: </I> 34.3 parts of the aminomonoazo compound obtainable by coupling dia7otated 1-aminonaphthalene-5-sulfonic acid with 1-oxy-2-acetylaminobenzene and subsequent saponification of the ethylamino group are dissolved in 400 parts of water and 4 parts of sodium hydroxide dissolved. The solution is mixed with 6.9 parts of sodium nitrite and added dropwise to a mixture of 36 parts of concentrated hydrochloric acid and 100 parts of ice water.

   The diazo body thus obtained is introduced into a solution of 20.1 parts of 1-acetylamino-7-oxynaphthalene and 14 parts of sodium hydroxide in 150 parts of water while cooling with ice. As soon as the formation of the disazo dye is complete, it is deposited with sodium chloride from the coupling compound, filtered off and dried.



  The new chromable disazo dye is a dark powder that dissolves in a dilute soda solution with a blue-gray color and in concentrated sulfuric acid with a blue color and re-chromes wool and dyes it metachromically in olive-green tones. The dyeings have good lightfastness and excellent wetfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chromier- baren Disazofarbstoffes, dadurch gekennzeich net, dass man 1 Mol der Diazoverbindung aus der durch Kuppeln von diazotierter 1-Amino- naphthalin-5-sulfonsäure mit 1-Oxy-2-acetyl- aminobenzol und anschliessendes Verseifen der Acetylaminogruppe erhältlichen Aminomono- azoverbindung mit 1 Möl PATENT CLAIM: A process for the preparation of a chromable disazo dye, characterized in that 1 mol of the diazo compound is obtained from the 1-amino-naphthalene-5-sulfonic acid obtained by coupling diazotized 1-oxy-2-acetyl-aminobenzene and then saponified Acetylamino available amino monoazo compound with 1 Möl 1-Acetylamino-7- oxynaphthalin kuppelt. Der neue ehromierbare Disazofarbstoff ist ein dunkles Pulver, das sich in verdünnter Sodalösung mit blaugrauer, in konzentrierter Schwefelsäure mit blauer Farbe löst und Wolle nachchromiert und metachrom in olivgrünen Tönen färbt. Die Färbungen besitzen eine gute Licht- und vorzügliche Nassechtheiten. 1-acetylamino-7-oxynaphthalene couples. The new honorable disazo dye is a dark powder that dissolves in a dilute soda solution with a blue-gray color and in concentrated sulfuric acid with a blue color and re-chromes wool and dyes it metachromically in olive-green tones. The dyeings have good lightfastness and excellent wetfastness.
CH302033D 1951-09-04 1951-09-04 Process for the preparation of a chromable disazo dye. CH302033A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH302033T 1951-09-04
CH297842T 1953-01-21

Publications (1)

Publication Number Publication Date
CH302033A true CH302033A (en) 1954-09-30

Family

ID=25733872

Family Applications (1)

Application Number Title Priority Date Filing Date
CH302033D CH302033A (en) 1951-09-04 1951-09-04 Process for the preparation of a chromable disazo dye.

Country Status (1)

Country Link
CH (1) CH302033A (en)

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