CH209514A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH209514A
CH209514A CH209514DA CH209514A CH 209514 A CH209514 A CH 209514A CH 209514D A CH209514D A CH 209514DA CH 209514 A CH209514 A CH 209514A
Authority
CH
Switzerland
Prior art keywords
dye
acid
nitro
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 CH209514A publication Critical patent/CH209514A/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

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 199787.    Verfahren zur Herstellung eines     Disazofarbstoffes.       Gegenstand des vorliegenden Zusatzpatentes ist ein Verfahren zur Herstellung eines       Disazofarbstoffes    der Formel  
EMI0001.0003     
    dadurch gekennzeichnet, dass man den durch  Kuppeln von dianotierter     4-Nitro-l-amino-          benzol-2-sulfonsäure    mit     2-Amino-8-naphtol-          3,6-disulfonsäure    in saurer Lösung und Re  duktion des entstandenen Nitrofarbstoffes mit       Natriumsulfid    erhältlichen     1Vlonoazofarbstoff     dianotiert,

   alkalisch mit Phenol vereinigt und  den     Disazofarbstoff    in alkalischer Lösung mit       p-Toluolsulfonsäurechlorid    in der     phenolischen          Hydrogylgruppe    verestert. Der neue     Farbstoff     färbt Wolle und Seide aus saurem Bade in  schönen, lichtechten, violetten Tönen.

      <I>Beispiel:</I>  51,8 Teile des nach bekanntem Verfahren  durch Kuppeln von dianotierter     4-Nitro-l-          aminobenzol-2-sulfonsäure    mit     2-Amino-8-          naphtol-3,6-disulfonsäure    in saurer Lösung  und Reduktion des Nitrofarbstoffes mit Na  triumsulfid erhaltenen     1VIonoazofarbstoffes    wer  den mit 6,

  5 Teilen     Natriumnitrit    und 40 Teilen       Salzsäure        30        %        bei    0              C        dianotiert        und        mit     einer     sodaalkalischen    Lösung von 9,5 Teilen  Phenol in der Kälte vereinigt.

   Nach been  deter Kupplung, die in kurzer Zeit erfolgt,  erwärmt man auf<B>750</B> C, versetzt mit über-           schüssiger    Soda und darauf mit 50 Teilen       p-Toluolsulforisäurechlm-id,    hält bei dieser  Temperatur, bis die     Veresterung    beendet ist,  salzt aus, filtriert und trocknet.  



  Der neue     Farbstoff,    ein dunkles Pulver,    löst sich in Wasser violett und in     konzen-          zentrierter    Schwefelsäure grünblau.



  <B> Additional patent </B> to main patent no. 199787. 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
EMI0001.0003
    characterized in that the 1Vlonoazo dye obtainable by coupling dianotated 4-nitro-1-aminobenzene-2-sulfonic acid with 2-amino-8-naphthol-3,6-disulfonic acid in acidic solution and reducing the resulting nitro dye with sodium sulfide dianotized,

   combined alkaline with phenol and esterified the disazo dye in alkaline solution with p-toluenesulfonic acid chloride in the phenolic hydroyl group. The new dye dyes wool and silk from an acid bath in beautiful, lightfast, violet tones.

      <I> Example: </I> 51.8 parts of the known process by coupling dianotized 4-nitro-l-aminobenzene-2-sulfonic acid with 2-amino-8-naphthol-3,6-disulfonic acid in acidic solution and Reduction of the nitro dye with sodium sulfide obtained 1Vionoazo dye who with 6,

  5 parts of sodium nitrite and 40 parts of hydrochloric acid 30% dianotized at 0 C and combined with a soda-alkaline solution of 9.5 parts of phenol in the cold.

   After coupling has ended, which takes place in a short time, the mixture is heated to 750 C, mixed with excess soda and then with 50 parts of p-toluenesulforic acid chloride, and the mixture is kept at this temperature until the esterification has ended is, salt out, filtered and dried.



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

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes der Formel EMI0002.0010 dadurch gekennzeichnet, dass man den durch Kuppeln von dianotierter 4-Nitro-l-ainino- benzol-2-sulfonsäure mit 2-Amino-8-naphtol- 3,6-disulforisäure in saurer Lösung und Re duktion des entstandenen Nitrofarbstoffes mit Natriumsulfid erhältlichen Monoazofarbstoff dianotiert, PATENT CLAIM: Process for the production of a disazo dye of the formula EMI0002.0010 characterized in that the monoazo dye obtainable by coupling dianotated 4-nitro-1-ainino-benzene-2-sulfonic acid with 2-amino-8-naphthol-3,6-disulforic acid in acidic solution and reduction of the resulting nitro dye with sodium sulfide dianotized, alkalisch mit Phenol vereinigt und den Disazofarbstoff in alkalischer Lösung mit p-Toluolsulforisäurechlorid in der phenolischen Hydroxylgruppe verestert. Der neue Farbstoff färbt Wolle und Seide aus saurem Bade in schönen, lichtechten, violetten Tönen. alkaline combined with phenol and esterified the disazo dye in alkaline solution with p-toluenesulforic acid chloride in the phenolic hydroxyl group. The new dye dyes wool and silk from an acid bath in beautiful, lightfast, violet tones.
CH209514D 1938-02-26 1938-02-26 Process for the preparation of a disazo dye. CH209514A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH209514T 1938-02-26
CH199787T 1938-07-19

Publications (1)

Publication Number Publication Date
CH209514A true CH209514A (en) 1940-04-15

Family

ID=25723366

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209514D CH209514A (en) 1938-02-26 1938-02-26 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH209514A (en)

Similar Documents

Publication Publication Date Title
CH250819A (en) Process for the preparation of a new copper-compatible polyazo dye.
CH209514A (en) Process for the preparation of a disazo dye.
CH209516A (en) Process for the preparation of a disazo dye.
CH209513A (en) Process for the preparation of a disazo dye.
CH209515A (en) Process for the preparation of a disazo dye.
CH204711A (en) Process for the preparation of a disazo dye.
CH223709A (en) Process for the production of a new azo dye.
CH210994A (en) Process for the preparation of a disazo dye.
CH192045A (en) Process for the production of a new azo dye.
CH210993A (en) Process for the preparation of a disazo dye.
CH210992A (en) Process for the preparation of a disazo dye.
CH191739A (en) Process for the preparation of an azo dye.
CH192047A (en) Process for the production of a new azo dye.
CH210996A (en) Process for the preparation of a disazo dye.
CH192049A (en) Process for the production of a new azo dye.
CH199368A (en) Process for the preparation of an azo dye.
CH241145A (en) Process for the preparation of a new disazo dye.
CH192038A (en) Process for the production of a new azo dye.
CH192039A (en) Process for the production of a new azo dye.
CH205801A (en) Process for the preparation of a monoazo dye.
CH203864A (en) Process for the preparation of a disazo dye.
CH243001A (en) Process for the preparation of a copper-compatible polyazo dye.
CH203867A (en) Process for the preparation of a disazo dye.
CH222692A (en) Process for the preparation of a monoazo dye.
CH220106A (en) Process for the production of a new azo dye.