CH265409A - Process for the preparation of a chromable azo dye. - Google Patents

Process for the preparation of a chromable azo dye.

Info

Publication number
CH265409A
CH265409A CH265409DA CH265409A CH 265409 A CH265409 A CH 265409A CH 265409D A CH265409D A CH 265409DA CH 265409 A CH265409 A CH 265409A
Authority
CH
Switzerland
Prior art keywords
dye
azo dye
preparation
oxy
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 J R Geigy filed Critical Ag J R Geigy
Publication of CH265409A publication Critical patent/CH265409A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     ehromierbaren        Azofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines     chromier-          baren        Azofarbstoffes.    Das Verfahren ist da  durch gekennzeichnet, dass     diazotiertes        4-Ni-          ti@o        2-amino-l-oxy-benzol    mit     4-Methy        1-1-oxy-          naplitlialin-8-sulfonsäure    in alkalischem Me  dium vereinigt wird.

   Der Chromkomplex des  neuen Farbstoffes stellt ein blaugraues Pul  ver dar, das Wolle aus ameisensaurem Bade  in neutralen, grauen Tönen von sehr guter  Gleichmässigkeit färbt.    <I>Beispiel:</I>  15,4 Teile     4-Nitro-2-amino-l-oxy-benzol     werden     diazotiert,    die überschüssige Säure  mit     Natriumcarbonat    bis auf neutrale Reak  tion weggenommen und dann in eine Lösung  von 28 Teilen     4-metliy        1-1-oxy-naphthalin-8-          sulfonsaurein    Natrium in 500 Teilen     Wasser,     10 Teilen wasserfreiem     2#,7atriunicarbonat    und  30 Teilen     Pyridin    gegossen.

       --Man    rührt bei  Raumtemperatur bis die     Farbstoffbildung     beendet ist, erwärmt dann auf i0", gibt Koch  salz bis zur völligen Ausfällung des Farb-         stoffes    zu und filtriert ab. Der Chrom  komplex des Farbstoffes kann erhalten wer  den, indem man obigen Farbstoff in 1500  Teilen Wasser verrührt, eine Lösung von       ehromsalicylsaurem    Ammonium (entspre  chend 9,9 Teilen Chromoxyd) zugibt und 15  Stunden zum Sieden erhitzt. Es bildet sich  eine     dunkelviolette    Lösung, aus der der       ehromhaltige    Farbstoff in feinkristalliner  Form durch Zugabe von Kochsalz ausge  schieden wird.



  Process for the production of an honorable azo dye. The subject of the present patent is a process for the production of a chromable azo dye. The process is characterized in that diazotized 4-Ni @ o 2-amino-1-oxy-benzene is combined with 4-methyl 1-1-oxy-naplitlialin-8-sulfonic acid in an alkaline medium.

   The chromium complex of the new dye is a blue-gray powder that dyes wool from an acidic bath in neutral, gray tones of very good uniformity. <I> Example: </I> 15.4 parts of 4-nitro-2-amino-1-oxy-benzene are diazotized, the excess acid is removed with sodium carbonate to a neutral reaction and then poured into a solution of 28 parts of 4- Metliy 1-1-oxy-naphthalene-8-sulfonsaurein sodium poured into 500 parts of water, 10 parts of anhydrous 2 #, 7atriunicarbonat and 30 parts of pyridine.

       - The mixture is stirred at room temperature until the dye has formed, then warmed to 10 ", added sodium chloride until the dye was completely precipitated and filtered off. The chromium complex of the dye can be obtained by adding the above dye to 1500 Stirring parts of water, adding a solution of Ehromsalicylsaurem ammonium (corresponding to 9.9 parts of chromium oxide) and boiling for 15 hours. A dark purple solution forms, from which the Ehrom-containing dye is precipitated in fine crystalline form by adding sodium chloride.

Claims (1)

P ATEM TAN SPRU CH Verfahren zur Herstellung eines ehromier- baren Azofarbstoffes, dadurch gekennzeich net, dass diazotiertes 4-Nitro 2-amino-l-oxy- benzol mit 4-lIethyl-l-oxy-napht.halin-8-sul- fonsäure in alkalischem Medium vereinigt wird. Der Chromkomplex des neuen Farb stoffes stellt ein blaugraues Pulver dar, das Wolle aus ameisensaurem Bade in neutralen, grauen Tönen von sehr guter Gleichmässig keit färbt. P ATEM TAN SPRU CH Process for the production of an honorable azo dye, characterized in that diazotized 4-nitro 2-amino-1-oxybenzene with 4-ethyl-1-oxy-naphth.halin-8-sulphonic acid is combined in an alkaline medium. The chromium complex of the new dye is a blue-gray powder that dyes wool from an acidic bath in neutral, gray tones with very good uniformity.
CH265409D 1944-12-21 1944-12-21 Process for the preparation of a chromable azo dye. CH265409A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH260305T 1944-12-21
CH265409T 1944-12-21

Publications (1)

Publication Number Publication Date
CH265409A true CH265409A (en) 1949-11-30

Family

ID=25730294

Family Applications (1)

Application Number Title Priority Date Filing Date
CH265409D CH265409A (en) 1944-12-21 1944-12-21 Process for the preparation of a chromable azo dye.

Country Status (1)

Country Link
CH (1) CH265409A (en)

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