CH214816A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH214816A
CH214816A CH214816DA CH214816A CH 214816 A CH214816 A CH 214816A CH 214816D A CH214816D A CH 214816DA CH 214816 A CH214816 A CH 214816A
Authority
CH
Switzerland
Prior art keywords
amino
azo dye
nitro
tones
green
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH214816A publication Critical patent/CH214816A/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

Description

  

  Verfahren zur Herstellung eines     Azofarbstoifes.       Gegenstand des Hauptpatentes ist ein  Verfahren zur Herstellung eines neuen     Azo-          farbstoffes,    bei dem man die     Diazoverbin-          dung    von     2-Amino-4,6-dinitro-l-oxybenzol     mit     1-Amino-7-nitro-8-oxynaphthalin-4-sul-          fonsäure    kuppelt.  



  Es wurde nun gefunden, dass man einen  neuen, ebenfalls     wertvollen        Azofarbstoff    er  hält, wenn man die     Diazoverbindung    des     4-          Chlor-6-nitro-2-amino-l-oxybenzols    mit     1-          Amino-7-nitro-8-oxynaphthalin-    4     -sul    f     onsäure     kuppelt.  



  Der neue Farbstoff färbt Wolle aus sau  rem Bade in violetten Tönen, die beim     Nach-          chromieren    auf der Faser in olivgrün über  gehen. Die in Substanz hergestellte komplexe  Chromverbindung färbt Wolle und Leder in  sehr echten grünen Tönen.  



  <I>Beispiel:</I>  Man versetzt 284 Teile     1-Amino-7-nitro-8-          oxynaphthalin-4-sulfonsäure,    die durch Ni-         trieren    der     1-Amino-8-oxynaphthalin-4-sul-          fonsäure        in    konzentrierter     Schwefelsäure    er  halten wird, mit 120 Teilen 34,5 %     iger    Na  tronlauge, die man zunächst mit Wasser ver  dünnt, gibt in bekannter Weise     hergestellte          Diazoverbindung    aus 188,5 Teilen     4-Chlor-          6-nitro-2-amino-l-oxybenzol    zu,

   lässt eine Lö  sung von 272 Teilen kristallisiertem Natrium  acetat zulaufen und darauf langsam eine Lö  sung von 212 Teilen wasserfreiem Natrium  carbonat. Nach mehreren     Stunden    ist der  Farbstoff entstanden; er wird in üblicher  Weise     ausgesalzen.    Er färbt Wolle in violet  ten Tönen, die durch     Nachchromieren    auf der  Faser in olivgrün übergehen.  



  Zur Herstellung der Chromverbindung be  handelt man den     entstandenen    Farbstoff drei       Stunden    lang bei<B>130'</B> C mit einer Chrom  formiatlösung, die 80 Teilen Chromoxyd ent  spricht. Die so hergestellte     Chromverbindung     des     Azofarbstoffes    färbt Wolle, Chrom- und       Glaceleder    in     tiefgrünen,    sehr echten Tönen.



  Process for the production of an azo dye. The main patent relates to a process for the production of a new azo dye, in which the diazo compound of 2-amino-4,6-dinitro-1-oxybenzene with 1-amino-7-nitro-8-oxynaphthalene-4- sulphonic acid couples.



  It has now been found that a new, also valuable azo dye is obtained if the diazo compound of 4-chloro-6-nitro-2-amino-1-oxybenzene is used with 1-amino-7-nitro-8-oxynaphthalene-4 -sul f onic acid couples.



  The new dye dyes wool from acidic baths in violet tones, which change to olive green when the fibers are chromed. The complex chromium compound produced in substance dyes wool and leather in very real green tones.



  <I> Example: </I> 284 parts of 1-amino-7-nitro-8-oxynaphthalene-4-sulfonic acid are added, which are concentrated by nitrating 1-amino-8-oxynaphthalene-4-sulfonic acid Sulfuric acid is kept, with 120 parts of 34.5% strength sodium hydroxide solution, which is first diluted ver with water, gives diazo compound prepared in a known manner from 188.5 parts of 4-chloro-6-nitro-2-amino-1-oxybenzene to,

   lets run a solution of 272 parts of crystallized sodium acetate and then slowly a solution of 212 parts of anhydrous sodium carbonate. The dye has formed after several hours; it is salted out in the usual way. It dyes wool in violet tones, which change to olive green when the fibers are chrome-plated.



  To produce the chromium compound, the resulting dye is treated for three hours at 130 ° C with a chromium formate solution containing 80 parts of chromium oxide. The chrome compound of the azo dye produced in this way dyes wool, chrome and glazed leather in deep green, very real tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des 4-Chlor-6-nitro-\)- amino-l-oxybenzols mit 1-Amino-7-nitro-8- oxynaphthalin-4-sulfonsäure kuppelt. Der neue Farbstoff färbt Wolle in violet ten Tönen, die beim Nachchromieren in oliv- grün übergehen. Die in Substanz hergestellte komplexe Chromverbindung färbt. Wolle und Leder in grünen Tönen. PATENT CLAIM: Process for the production of an azo dye, characterized in that the diazo compound of 4-chloro-6-nitro - \) - amino-1-oxybenzene with 1-amino-7-nitro-8-oxynaphthalene-4-sulfonic acid clutch. The new dye dyes wool in violet tones, which change to olive-green when chromed. The complex chromium compound produced in substance colors. Wool and leather in green tones.
CH214816D 1938-07-21 1939-06-14 Process for the preparation of an azo dye. CH214816A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE214816X 1938-07-21
CH212420T 1939-06-14

Publications (1)

Publication Number Publication Date
CH214816A true CH214816A (en) 1941-05-15

Family

ID=25725253

Family Applications (1)

Application Number Title Priority Date Filing Date
CH214816D CH214816A (en) 1938-07-21 1939-06-14 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH214816A (en)

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