CH192044A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH192044A
CH192044A CH192044DA CH192044A CH 192044 A CH192044 A CH 192044A CH 192044D A CH192044D A CH 192044DA CH 192044 A CH192044 A CH 192044A
Authority
CH
Switzerland
Prior art keywords
azo dye
new azo
production
dye
blue
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH192044A publication Critical patent/CH192044A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
    • C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man die     Diazover-          bindung    des     1-Arninobenzol-4-nitr,o-2-methyl-          sulfons    in saurem Medium mit     1-Arnirro-8-          oxyrraphthalirr-3,6-disulfonsäur-e    vereinigt und  diesen so erhältlichen Farbstoff in alkalischem  Medium mit     Diazobenzol    umsetzt.

   Der neue       Azofarbstoff    bildet ein dunkles Pulver, das  sich in Wasser mit blauer Farbe löst und  Wolle aus saurem Bade in blauschwarzen  Tönen von guten Echtheitseigenschaften färbt..  <I>Beispiel:</I>  21,6 Teile     1-Amirrobenzol-4-nitro-2-methyl-          sulforr    werden fein pulverisiert und nach be  kannten Methoden in     konz.    Schwefelsäure       tnit    7 Teilen     Natriunrnitrit        diazotiert.    Diese       Diazolösung    trägt man in Eiswasser ein und  gibt unter Rühren 31,9 Teile fein gefällter       1-Amitro-8-oxynaphthalirt-3,6-disulfonsäure    zu  und rührt ca.

   3 Stunden bei gewöhnlicher  Temperatur. Dann trägt man das notwendige       Natriumcarbonat    ein und vereinigt in alka  lischem Medium mit einer     Diazolösung    aus    9,3 Teilen Anilin, die auf bekannte Weise  hergestellt wird. Der     Farbstoff    fällt aus     lind     wird     abfiltriert.    Durch     Umlösen    und Aus  salzen wird er gereinigt. Nach dem Trocknen  erhält man ein dunkles Pulver, das sich in  Wasser mit blauer Farbe löst und Wolle aus  saurem Bade blauschwarz färbt.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the diazo compound of 1-aminobenzene-4-nitr, o-2-methyl-sulfone is used in an acidic medium with 1-amirro-8-oxyrraphthalir-3,6-disulfonic acid -e combined and this thus obtainable dye is reacted in an alkaline medium with diazobenzene.

   The new azo dye forms a dark powder that dissolves in water with a blue color and dyes wool from an acid bath in blue-black shades with good fastness properties. <I> Example: </I> 21.6 parts of 1-amirrobenzene-4-nitro -2-methyl-sulforr are finely pulverized and concentrated by known methods. Sulfuric acid diazotized with 7 parts of sodium nitrite. This diazo solution is poured into ice water and 31.9 parts of finely precipitated 1-amitro-8-oxynaphthalate-3,6-disulfonic acid are added with stirring and the mixture is stirred for approx.

   3 hours at ordinary temperature. Then you enter the necessary sodium carbonate and combined in alkaline medium with a diazo solution of 9.3 parts of aniline, which is prepared in a known manner. The dye precipitates and is filtered off. It is cleaned by dissolving and salting out. After drying, a dark powder is obtained which dissolves in water with a blue color and dyes wool from an acid bath blue-black.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des 1-Aminobenzol- 4-nitro-2-methylsulfons in saurem Medium mit 1-Amino-8-oxyr)aphthalin-3,6-disulfon- säure vereinigt und diesen so erhältlichen Farbstoff in alkalischem Medium mit der Diazoverbindung von Anilin umsetzt. Der neue Azofarbstoff bildet ein dunkles Pulver, das sich in Wasser mit blauer Farbe löst und Wolle aus saurem Bade in blau schwarzen Tönen von guten Echtheitseigen schaften färbt. Claim: Process for the production of a new azo dye, characterized in that the diazo compound of 1-aminobenzene-4-nitro-2-methylsulfone is combined in an acidic medium with 1-amino-8-oxyr) aphthalene-3,6-disulfonic acid and reacting this dye obtainable in this way in an alkaline medium with the diazo compound of aniline. The new azo dye forms a dark powder that dissolves in water with a blue color and dyes wool from an acid bath in blue-black shades with good fastness properties.
CH192044D 1936-01-30 1936-01-30 Process for the production of a new azo dye. CH192044A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH192044T 1936-01-30
CH190424T 1936-01-30

Publications (1)

Publication Number Publication Date
CH192044A true CH192044A (en) 1937-07-15

Family

ID=25721984

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192044D CH192044A (en) 1936-01-30 1936-01-30 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH192044A (en)

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