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CH209515A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH209515A
CH209515A CH209515DA CH209515A CH 209515 A CH209515 A CH 209515A CH 209515D A CH209515D A CH 209515DA CH 209515 A CH209515 A CH 209515A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
diazotized
disazo dye
disazo
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH209515A publication Critical patent/CH209515A/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
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/04—Disazo dyes characterised by the tetrazo component the tetrazo component being a benzene derivative

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>199787.</B>    Verfahren zur Herstellung eines     Disazofarbstoffes.       Gegenstand des vorliegenden Zusatzpatentes ist ein Verfahren zur Herstellung eines     Dis-          azofarbstoffes    der Formel:

    
EMI0001.0005     
    dadurch gekennzeichnet,     dass    man den durch  Kuppeln von     diazotiertem        4-Nitro-l-amino-          benzol-2-pheiiylsulion    mit     2-Amino-8-napbtol-          3,6-distilfonsäure    in saurer Lösung und Re  duktion des entstandenen     Nitrofarbstoffes    mit       Natriumsulfid    erhältlichen     Monoazofarbstoff          diazotiert,

      alkalisch mit Phenol vereinigt     und     den     Disazofarbstoff    in alkalischer Lösung mit       p-Toluolsulfotisäurechlorid    in der     phenolischen          Hydroxylgruppe    verestert. Der neue Farb  stoff färbt Wolle und Seide aus saurem oder  neutralem Bade in lichtechten,     rotWauen     Tönen.

      <I>Beispiel:</I>    <B>57,8</B> Teile des nach bekanntem Verfahren  durch Kuppeln von     diazotiertem        4-Nitro-l-          aminobenzol-2-phenylsulfon    mit     2-Amino-8-          naphtol-3,6--disulfonsäure    in saurer Lösung  und Reduktion des     Nitrofarbstof#es    mit     Na-          triumsulfid    erhaltenen     Monoazofarbstoffes    wer  den mit<B>6,

  5</B> Teilen     NatriumDitrit    und 40 Tei  len Salzsäure<B>30</B> % bei<B>0 0</B>     C        diazotiert    und  mit einer     sodaalkalischen    Lösung von     9,6     Teilen Phenol in der Kälte vereinigt. Nach  beendeter Kupplung, die<B>*</B> in kurzer Zeit er  folgt, erwärmt man auf<B>75 0 C,</B> versetzt mit  überschüssiger Soda und darauf mit<B>50</B> Tei-           len        p-Toluolstilfonsäurechloi-id,    hält bei     die.-er     Temperatur, bis die     Veresterung    beendet ist,  salzt aus, filtriert und trocknet.

      Der neue Farbstoff, ein dunkles Pulver,  löst sieh in Wasser- violett und in konzen  trierter Schwefelsäure blau.



  Additional patent to main patent no. <B> 199787. </B> Process for the production of a disazo dye. The subject of the present additional patent is a process for the preparation of a disazo dye of the formula:

    
EMI0001.0005
    characterized in that the monoazo dye obtainable by coupling diazotized 4-nitro-l-aminobenzene-2-pheiiylsulion with 2-amino-8-napbtol-3,6-distilfonic acid in acidic solution and reduction of the resulting nitro dye with sodium sulfide diazotized,

      combined alkaline with phenol and esterified the disazo dye in alkaline solution with p-toluene sulphonyl chloride in the phenolic hydroxyl group. The new dye dyes wool and silk from acidic or neutral baths in lightfast, red-soft tones.

      <I> Example: </I> <B> 57.8 </B> parts of the known process by coupling diazotized 4-nitro-1-aminobenzene-2-phenylsulfone with 2-amino-8-naphthol-3, 6 - disulfonic acid in acidic solution and reduction of the nitro dye # es with sodium sulfide obtained monoazo dye with <B> 6,

  5 parts sodium ditrite and 40 parts hydrochloric acid <B> 30 </B>% are diazotized at <B> 0 0 </B> C and combined with a soda-alkaline solution of 9.6 parts phenol in the cold. After the coupling is complete, which <B> * </B> takes place in a short time, it is heated to <B> 75 0 C, </B> mixed with excess soda and then with <B> 50 </B> parts len p-Toluolstilfonsäurechloi-id, holds at die.-er temperature until the esterification is complete, salted out, filtered and dried.

      The new dye, a dark powder, dissolves in water violet and in concentrated sulfuric acid blue.

Claims (1)

<B>.PATENTANSPRUCH:</B> Verfahren zur Herstellung eines Disazofarbstoffes der Formel EMI0002.0006 dadurch gekennzeichnet, dass man den durch Kuppeln von diazotiertem 4-Niti,o-l-amiiio- beilzol-2-phenylsulfoii mit 2-Amino-8-naphtol- 3,6-distilfonsäure, in saurer Lösung und Re duktion des entstandenen Nitrofarbstoffes mit Natriumsulfid erhältlichen Monoazofarbstoff diazotiert, <B>. PATENT CLAIM: </B> Process for the preparation of a disazo dye of the formula EMI0002.0006 characterized in that the by coupling of diazotized 4-Niti, ol-amiiio- beilzol-2-phenylsulfoii with 2-amino-8-naphthol-3,6-distilfonic acid, in acidic solution and reduction of the resulting nitro dye with sodium sulfide obtainable Diazotized monoazo dye, alkalisch mit Pheriol vereinigt und den Disazofarbstoff in alkalischer Lösung mit p-Toltiolsulfotisätireehloi-id in der phenolischen Hydroxylgruppe verestert. Der neue Farb stoff färbt Wolle und Seide aus saurem oder neutralem Bade in lichtechten, rotblauen Tönen. combined alkaline with pheriol and esterified the disazo dye in alkaline solution with p-Toltiolsulfotisätireehloi-id in the phenolic hydroxyl group. The new dye dyes wool and silk from acidic or neutral baths in lightfast, red-blue tones.
CH209515D 1938-02-26 1938-02-26 Process for the preparation of a disazo dye. CH209515A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH209515T 1938-02-26
CH199787T 1938-07-19

Publications (1)

Publication Number Publication Date
CH209515A true CH209515A (en) 1940-04-15

Family

ID=25723367

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209515D CH209515A (en) 1938-02-26 1938-02-26 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH209515A (en)

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