CH270832A - Process for the preparation of a trisazo dye. - Google Patents

Process for the preparation of a trisazo dye.

Info

Publication number
CH270832A
CH270832A CH270832DA CH270832A CH 270832 A CH270832 A CH 270832A CH 270832D A CH270832D A CH 270832DA CH 270832 A CH270832 A CH 270832A
Authority
CH
Switzerland
Prior art keywords
dye
diazotized
amino
preparation
trisazo dye
Prior art date
Application number
Other languages
German (de)
Inventor
Bayer Farbenfabriken
Original Assignee
Bayer 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 Bayer Ag filed Critical Bayer Ag
Publication of CH270832A publication Critical patent/CH270832A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/36—Trisazo dyes of the type
    • C09B35/362—D is benzene

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

Description

       

  Verfahren zur Herstellung eines     Trisazofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     Trisazo-          farbstoffes.    Das Verfahren ist dadurch ge  kennzeichnet, dass man     diazotiertes        4-Amino-          4'-oxy-3'-carboxyazobenzol    mit     Aminohydro-          ehinondimethyläther    kuppelt,

   den so erhal  tenen     Aminodisazofarbstoff        weiterdiazotiert     und schliesslich     sodaalkalisch    mit     2-Amino-8-          oxynaphthalin-6-sulfonsäure    vereinigt.  



  Der neue Farbstoff ist ein wasserlösliches  dunkles Pulver und färbt. Baumwolle in tie  fen schwarzen Tönen an, die bei der Nach  behandlung mit Chrom- oder Kupfersalzen  wasch- und lichtecht werden.    gekuppelt und der     Aminodisazofarbstoff    iso  liert. Er wird     weiterdiazotiert    und schliess  lich     sodaalkal.isch    auf 24,0 g     2-Amino-8-oxy-          naphthalin-6-sulfonsäure    gekuppelt, isoliert  und getrocknet. Er färbt Baumwolle in tiefen  schwarzen Tönen an, die bei der Nachbehand  lung mit Chrom- oder Kupfersalzen wasch  echt werden.

      <I>Beispiel:</I>  13,8 g     p-Nitranilin    werden in der üblichen  Weise     diazotiert    und     sodaalkaliseh    auf 14,0 g       Salicylsäure    gekuppelt. Die Nitrogruppe des       Monoazofarbstoffeswird    mit Schwefelnatrium  zum Amin reduziert, der     Aminoazofarbstoff     isoliert und salzsauer     diazotiert.    Die     Diazo-          verbindung        wind    in schwach saurer Lösung  auf 15,3 g     Aminohydrochinondimethyläther  



  Process for the preparation of a trisazo dye. The present patent relates to a process for the production of a trisazo dye. The process is characterized in that diazotized 4-amino-4'-oxy-3'-carboxyazobenzene is coupled with aminohydro-ehinondimethyl ether,

   the aminodisazo dye thus obtained is further diazotized and finally combined with 2-amino-8-oxynaphthalene-6-sulfonic acid in an alkaline soda.



  The new dye is a water-soluble dark powder and colors. Cotton in deep black tones, which are washable and lightfast when treated with chrome or copper salts. coupled and the aminodisazo iso lated. It is further diazotized and finally coupled to 24.0 g of 2-amino-8-oxynaphthalene-6-sulfonic acid, isolated and dried. It dyes cotton in deep black tones, which become washable when treated with chrome or copper salts.

      <I> Example: </I> 13.8 g of p-nitroaniline are diazotized in the usual way and coupled with soda-alkali metal to 14.0 g of salicylic acid. The nitro group of the monoazo dye is reduced to the amine with sodium sulfur, the aminoazo dye is isolated and diazotized with hydrochloric acid. The diazo compound is in a weakly acidic solution on 15.3 g of aminohydroquinone dimethyl ether

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Trisazo- farbstoffes, dadurch gekennzeichnet, dass man diazotiertes 4-Amino-4'-oxy-3'-carboxy- azobenzol mit Aminohydroehinondimethyl- äther kuppelt, den so erhaltenen Aminodisazo- farbstoff weiterdiazotiert und schliesslich sodaalkalisch mit 2-Amino-8-oxynaphtha.Iin-6- sulfonsäure vereinigt. PATENT CLAIM: Process for the production of a trisazo dye, characterized in that diazotized 4-amino-4'-oxy-3'-carboxy-azobenzene is coupled with aminohydroquinone dimethyl ether, the aminodisazo dye thus obtained is further diazotized and finally soda-alkaline with 2- Amino-8-oxynaphtha.Iin-6-sulfonic acid combined. Der neue Farbstoff ist ein wasserlösliches dunkles Pulver und färbt Baumwolle in tiefen schwarzen Tönen an, die bei der Nachbehand lung mit Chrom- oder Kupfersalzen wasch- und lichtecht werden. The new dye is a water-soluble dark powder and dyes cotton in deep black tones, which are washable and lightfast when treated with chrome or copper salts.
CH270832D 1948-11-30 1948-11-30 Process for the preparation of a trisazo dye. CH270832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH270832T 1948-11-30

Publications (1)

Publication Number Publication Date
CH270832A true CH270832A (en) 1950-09-30

Family

ID=4477932

Family Applications (1)

Application Number Title Priority Date Filing Date
CH270832D CH270832A (en) 1948-11-30 1948-11-30 Process for the preparation of a trisazo dye.

Country Status (1)

Country Link
CH (1) CH270832A (en)

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