CH222136A - Process for the preparation of a 1,1'-dioxyazo dye. - Google Patents

Process for the preparation of a 1,1'-dioxyazo dye.

Info

Publication number
CH222136A
CH222136A CH222136DA CH222136A CH 222136 A CH222136 A CH 222136A CH 222136D A CH222136D A CH 222136DA CH 222136 A CH222136 A CH 222136A
Authority
CH
Switzerland
Prior art keywords
dye
dioxyazo
preparation
water
oxynaphthalene
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz A G
Original Assignee
Sandoz 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 Sandoz Ag filed Critical Sandoz Ag
Publication of CH222136A publication Critical patent/CH222136A/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Herstellung eines     1.1'-Dioxyazofarbstoües.       Das vorliegende Patent betrifft ein Ver  fahren zur Darstellung eines 1 .     1'-Dioxya.zo-          farbstoffes    und ist dadurch gekennzeichnet,  dass man     4-Nitro-2-a.mino-l-oxybenzol-6-sul-          fonsäure        diazotiert    und in konzentriert     ätz-          alkalischer    Lösung mit     1-Oxynaphthalin    ver  einigt.  



  <I>Beispiel:</I>  30,8 kg     4-Nitro-2-amino-l-oxybenzol-6-          sulfonsäure    werden in üblicher Weise derart       diazotiert,    dass das Endvolumen nicht mehr  als 150 Liter beträgt. Die     Diazotierungs-          masse    trägt man bei 0   in eine     Aufschläm-          mung    von     1-Oxynaphthalin-Natrium    in kon  zentrierter Natronlauge ein, welche sich da  durch herstellen lässt,

       da.ss    die Lösung von  29 kg     1-Oxynaphthalin    in 20 Liter Wasser  und 30 kg     30%iger    Natronlauge in eine     auf     0   gekühlte Lösung von 170 kg     Ätznatron    in  280 Liter Wasser eingerührt wird. Die Masse  beginnt sich dunkel zu färben. Nach beendig  ter Kupplung verdünnt man mit 500 Liter  Wasser, neutralisiert das überschüssige Al  kali mit Salzsäure bis zur     Abscheidung    des    Farbstoffes, filtriert ab und reinigt,     wenn     nötig, durch     Umlösung.    Der     getrocknete    und  gepulverte Farbstoff stellt ein dunkles Pul  ver dar.

   Er löst sich in Wasser mit violetter,  in konzentrierter Schwefelsäure mit braun  roter Farbe. Er färbt Wolle nach dem     Nach-          chromierungs-    oder     Einbadchromverfahren    in  echten Schwarzoliven Tönen.



  Process for the preparation of a 1.1'-dioxyazo dye. The present patent relates to a method for displaying a 1. 1'-Dioxya.zo- dye and is characterized in that 4-nitro-2-a.mino-1-oxybenzene-6-sulphonic acid is diazotized and combined with 1-oxynaphthalene in concentrated caustic alkaline solution.



  <I> Example: </I> 30.8 kg of 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid are diazotized in the usual way in such a way that the final volume is no more than 150 liters. At 0, the diazotization compound is added to a slurry of 1-oxynaphthalene sodium in concentrated sodium hydroxide solution, which can then be produced

       da.ss the solution of 29 kg of 1-oxynaphthalene in 20 liters of water and 30 kg of 30% sodium hydroxide solution is stirred into a solution, cooled to 0, of 170 kg of caustic soda in 280 liters of water. The mass begins to turn dark. After the coupling has ended, it is diluted with 500 liters of water, the excess alkali is neutralized with hydrochloric acid until the dye has separated, filtered off and, if necessary, purified by dissolving. The dried and powdered dye is a dark powder.

   It dissolves in water with a violet color, in concentrated sulfuric acid with a brown-red color. He dyes wool in real black olive tones using the post-chrome plating or single-bath chrome process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines 1 .l'- Dioxyazofarbstoffes, dadurch gekennzeichnet, dass man 4-Nitro-2-amino-l-oxybenzol-6-sul- fonsäure diazotiert und in konzentriert ätz- alkalischer Lösung mit 1-Oxynaphthalin ver einigt. Der neue Farbstoff stellt ein dunkles Pulver dar. Er löst sich in Wasser mit vio letter, in konzentrierter Schwefelsäure mit braunroter Farbe. Claim: Process for the preparation of a 1 .l'-dioxyazo dye, characterized in that 4-nitro-2-amino-1-oxybenzene-6-sulphonic acid is diazotized and combined with 1-oxynaphthalene in concentrated caustic alkaline solution. The new dye is a dark powder. It dissolves in water with violet letter, in concentrated sulfuric acid with a brownish-red color. Er färbt Wolle nach dem Nachchromierungs- oder Einbadchromverfah- ren in echten Schwarzoliven Tönen. He dyes wool in real black olive tones using the post-chrome plating or single-bath chrome process.
CH222136D 1940-02-22 1940-02-22 Process for the preparation of a 1,1'-dioxyazo dye. CH222136A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH222136T 1940-02-22
CH218365T 1940-02-22

Publications (1)

Publication Number Publication Date
CH222136A true CH222136A (en) 1942-06-30

Family

ID=25726150

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222136D CH222136A (en) 1940-02-22 1940-02-22 Process for the preparation of a 1,1'-dioxyazo dye.

Country Status (1)

Country Link
CH (1) CH222136A (en)

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