CH302036A - Process for the preparation of a chromable disazo dye. - Google Patents

Process for the preparation of a chromable disazo dye.

Info

Publication number
CH302036A
CH302036A CH302036DA CH302036A CH 302036 A CH302036 A CH 302036A CH 302036D A CH302036D A CH 302036DA CH 302036 A CH302036 A CH 302036A
Authority
CH
Switzerland
Prior art keywords
chromable
disazo dye
mol
parts
preparation
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 CH302036A publication Critical patent/CH302036A/en

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
    • 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

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-          tlia.lin-5-sulfonsäure    mit     1-Oxy-2-acetylamino-          benzol.    und anschliessendes Verseifen der     Ace-          iylaminogruppe    erhältlichen     Aminomonoazo-          verbindung    mit 1     Mol        2-Oxynaphthalin    kup  pelt.  



  Im nachfolgenden Beispiel bedeuten die  Teile Gewichtsteile.  



       Beispiel:     34,3 Teile der durch Kuppeln von     diazo-          tierter        l.-Aminonaphthalin-5-sulfonsäure    mit       1-Oxy-2-acetylaminobenzol    und anschliessendes  Verseifen der     Acetylaminogruppe    erhältlichen       Aminomonoazoverbindung    werden in 400 Tei  len Wasser und 4 Teilen     Natriumhydroxyd          geli3st.    Man versetzt die Lösung mit 6,9 Teilen       Natriumnitrit    und tropft sie in eine Mischung  von 36 Teilen konzentrierter Salzsäure und  <B>100</B> Teilen Eiswasser.

   Den so erhaltenen     Diazo-          körper    trägt man unter Eiskühlung in eine  Lösung von 14,4 Teilen     2-Oxynaphthalin    und  14 Teilen     Natriumhydroxyd    in 150 Teilen  Wasser ein. Sobald die Bildung des     Disazo-          farbstoffes    beendigt ist, wird dieser mit Na-         triumchlorid    aus der Kupplungsmasse abge  schieden,     abfiltriert    und     getrocknet.     



  Der neue     chromierbare        Disazofarbstoff     ist ein dunkles Pulver, das sich in verdünnter       Sodalösung    mit violetter, in konzentrierter  Schwefelsäure mit blauer Farbe löst und Wolle       nachchromiert    und     metachrom    in     graustichig     braunen Tönen färbt. Die Färbungen besitzen  eine vorzügliche Licht- und sehr gute     Nassecht-          heiten.  



  <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 mol of the diazo compound is obtained by coupling diazotized 1-aminonaph- tlia.lin-5-sulfonic acid with 1-oxy-2-acetylamino-benzene. and subsequent saponification of the acylamino group obtainable aminomonoazo compound with 1 mol of 2-oxynaphthalene kup pelt.



  In the following example, the parts are parts by weight.



       Example: 34.3 parts of the aminomonoazo compound obtainable by coupling diazo- tated l-aminonaphthalene-5-sulfonic acid with 1-oxy-2-acetylaminobenzene and subsequent saponification of the acetylamino group are dissolved in 400 parts of water and 4 parts of sodium hydroxide. 6.9 parts of sodium nitrite are added to the solution and it is 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 14.4 parts of 2-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 separated from the coupling material with sodium chloride, filtered off and dried.



  The new chromable disazo dye is a dark powder that dissolves in a dilute soda solution with a violet color and in concentrated sulfuric acid with a blue color and re-chromates wool and dyes it metachromically in grayish brown tones. The dyeings have excellent lightfastness and very good 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 Mol PATENT CLAIM Process for the production of a chromable disazo dye, characterized in that 1 mol of the diazo compound is obtained from the 1-aminonaphthalene-5-sulfonic acid obtained by coupling diazotized 1-amino-2-acetyl-aminobenzene and then saponified the acetylamino group available aminomono- azo compound with 1 mol 2-Oxynaphthalin kuppelt. Der neue chromierbare Disazofarbstoff ist ein dunkles Pulver, das sich in verdünnter Sodalösung mit violetter, in konzentrierter Schwefelsäure mit blauer Farbe löst und. Wolle nachchromiert und metachrom in graustichig braunen Tönen färbt. Die Färbruigen besitzen eine vorzügliche Licht- und sehr gute Nass- echtheiten. 2-oxynaphthalene couples. The new chromable disazo dye is a dark powder that dissolves in a dilute soda solution with violet color and in concentrated sulfuric acid with blue color. Re-chromed wool and dyes metachromically in grayish brown tones. The dyed fruits have excellent light fastness and very good wet fastness.
CH302036D 1951-09-04 1951-09-04 Process for the preparation of a chromable disazo dye. CH302036A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH302036T 1951-09-04
CH297842T 1953-01-21

Publications (1)

Publication Number Publication Date
CH302036A true CH302036A (en) 1954-09-30

Family

ID=25733875

Family Applications (1)

Application Number Title Priority Date Filing Date
CH302036D CH302036A (en) 1951-09-04 1951-09-04 Process for the preparation of a chromable disazo dye.

Country Status (1)

Country Link
CH (1) CH302036A (en)

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