CH192046A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH192046A
CH192046A CH192046DA CH192046A CH 192046 A CH192046 A CH 192046A CH 192046D A CH192046D A CH 192046DA CH 192046 A CH192046 A CH 192046A
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 CH192046A publication Critical patent/CH192046A/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

  

      Zusatzpatent    zum     Hauptpatent    Nr. 190424.    Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man die     Diazover-          bindung    des     1-Aminobenzol-4-riitro-2-benzyl-          sulfons    in saurem Medium mit     1-Amino-8-          oxynaphthalin-3,6-disulfonsäure    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>  29,2 Teile     1-Aminobenzol-4-nitro-2-benzyl-          sulfon    werden fein pulverisiert und nach  bekannten Methoden in     konz.    Schwefelsäure  mit 7 Teilen     Natriumnitrit        diazotiert.    Diese       Diazolösung    trägt man in Eiswasser ein und'  gibt unter Rühren 31,9 Teile fein gefällte       1-Amino-8-oxynaphthalin-3,6-disulfonsäure    zu  und rührt ca. 3 Stunden bei gewöhnlicher  Temperatur.

   Dann trägt man das notwendige       Natriumcarbonat    ein und vereinigt in alkali  schem Medium mit einer     Diazolösung    aus    9,3 Teilen Anilin, die auf bekannte Weise  hergestellt wird. Der Farbstoff fällt aus und  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.



      Additional patent to main patent No. 190424. 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-nitro-2-benzylsulfone is combined with 1-amino-8-oxynaphthalene-3,6-disulfonic acid in an acidic medium and this thus obtainable dye reacts 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> 29.2 parts of 1-aminobenzene-4-nitro-2-benzyl sulfone are finely pulverized and concentrated in conc. 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-amino-8-oxynaphthalene-3,6-disulfonic acid are added with stirring and the mixture is stirred for about 3 hours at ordinary temperature.

   Then you enter the necessary sodium carbonate and combined in an alkaline Shem 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-benzylsulfons in saurem Medium mit 1-Amino-8-oxynaphthalin-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. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that the diazo compound of 1-aminobenzene-4-nitro-2-benzylsulphone is combined in an acidic medium with 1-amino-8-oxynaphthalene-3,6-disulphonic acid and these so obtainable dye reacts 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.
CH192046D 1936-01-30 1936-01-30 Process for the production of a new azo dye. CH192046A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH190424T 1936-01-30
CH192046T 1936-01-30

Publications (1)

Publication Number Publication Date
CH192046A true CH192046A (en) 1937-07-15

Family

ID=25721986

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192046D CH192046A (en) 1936-01-30 1936-01-30 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH192046A (en)

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