CH232047A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH232047A
CH232047A CH232047DA CH232047A CH 232047 A CH232047 A CH 232047A CH 232047D A CH232047D A CH 232047DA CH 232047 A CH232047 A CH 232047A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
disazo dye
ogy
diazotized
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 CH232047A publication Critical patent/CH232047A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/12—Disazo dyes in which the coupling component is a heterocyclic compound

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 230074.    Verfahren zur Herstellung eines     Bisazofarbstoffes.       Gegenstand vorliegender Erfindung ist  ein Verfahren zur Herstellung eines     Disazo-          farbstoffes.    Das Verfahren ist dadurch ge-    kennzeichnet, dass man 2     Mol        1-Amino-2-ogy-          5-nitrobenzol-3-sulfonsäure    diazotiert und       mit    1     Mol    des     Diimino,dipyrazols    des     4,4'-          Diamino-3,3'-dimethyldiphenyls    der     Foxmel     
EMI0001.0013     
    kuppelt.

    Der neue Farbstoff stellt ein braunes Pul  ver dar, das sich in Wasser mit braungelber  Farbe löst und Wolle     gelb    anfärbt.    <I>Beispiel:</I>  2     Mol        1-Amino-2-ogy-5-nitr.obentzo1-3-sul-          fonsäure    werden     diazotiert    und mit 1     Mol    des       Düminodipyrazols        -des        4,4'-Diamino-3,3'-di-          methyldip@henyls    der Formel  
EMI0001.0024     
      etwa 24 Stunden in saurer Lösung gekuppelt,

    dann wird     biearbonatalkalisch    bis     sodaalka-          lisch    zu Ende gekuppelt. Darauf wird ange  säuert,     ausgesalzen    und abgesaugt; der Farb  stoff wird umgelöst und getrocknet. Man er  hält ein     braunes    Pulver, das sieh in Wasser  löst und Wolle     gelb    anfärbt.  



  Durch     Nachchromieren    auf der     Faser    er  hält man ein     braunstichiges        Rdtt    von guter  Walk- und     Lichtechtheit.    Bei der Herstel-         lung    der Chromverbindung in Substanz er  hält man ebenfalls eine     braunrote    Chromver  bindung.



  <B> Additional patent </B> to main patent no. 230074. Process for the production of a bisazo dye. The present invention relates to a process for the preparation of a disazo dye. The process is characterized in that 2 moles of 1-amino-2-ogy-5-nitrobenzene-3-sulfonic acid are diazotized and 4,4'-diamino-3,3'-dimethyldiphenyl with 1 mole of diimino, dipyrazole the Foxmel
EMI0001.0013
    clutch.

    The new dye is a brown powder that dissolves in water with a brownish-yellow color and dyes wool yellow. <I> Example: </I> 2 moles of 1-amino-2-ogy-5-nitr.obentzo1-3-sulphonic acid are diazotized and 1 mole of the diminodipyrazole -des 4,4'-diamino-3,3 '-dimethyldip @ henyls of the formula
EMI0001.0024
      coupled in acidic solution for about 24 hours,

    then the coupling is carried out to the end in terms of bi-carbonate-alkaline to soda-alkaline. It is then acidified, salted out and suctioned off; the dye is dissolved and dried. One holds a brown powder that dissolves in water and dyes wool yellow.



  By re-chrome plating the fiber, a brownish tinge of good milled and lightfastness is obtained. When the chromium compound is produced in substance, a brown-red chromium compound is also obtained.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man 2 Mol 1-Amino-2-ogy-5-nitrobenzol-3-sulfon- säure diazotiert und mit 1 Mol des Diimino- dipy razols des 4,4'-Diamino-3,3'-dimethyl- diphenyls der Formel EMI0002.0027 kuppelt. Der neue Farbstoff stellt ein braunes Pulver dar, PATENT CLAIM: Process for the preparation of a disazo dye, characterized in that 2 moles of 1-amino-2-ogy-5-nitrobenzene-3-sulfonic acid are diazotized and 1 mole of the diimino-dipyrazole of 4,4'- Diamino-3,3'-dimethyl diphenyls of the formula EMI0002.0027 clutch. The new dye is a brown powder, das sich in Wasser mit braungelber Farbe löst und Wolle gelb anfärbt. which dissolves in water with a brownish yellow color and stains wool yellow.
CH232047D 1941-09-13 1942-08-19 Process for the preparation of a disazo dye. CH232047A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE232047X 1941-09-13
CH230074T 1942-08-19

Publications (1)

Publication Number Publication Date
CH232047A true CH232047A (en) 1944-04-30

Family

ID=25727439

Family Applications (1)

Application Number Title Priority Date Filing Date
CH232047D CH232047A (en) 1941-09-13 1942-08-19 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH232047A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197455A (en) * 1961-12-15 1965-07-27 Geigy Ag J R Disazo dyestuffs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197455A (en) * 1961-12-15 1965-07-27 Geigy Ag J R Disazo dyestuffs

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