CH238336A - Process for the preparation of a new disazo dye. - Google Patents

Process for the preparation of a new disazo dye.

Info

Publication number
CH238336A
CH238336A CH238336DA CH238336A CH 238336 A CH238336 A CH 238336A CH 238336D A CH238336D A CH 238336DA CH 238336 A CH238336 A CH 238336A
Authority
CH
Switzerland
Prior art keywords
preparation
disazo dye
new
dye
new disazo
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH238336A publication Critical patent/CH238336A/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
    • C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
    • C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Disazofarbstoffes.       Es wurde gefunden, dass man einen neuen       Disazofarbstoff    erhält, wenn man 2     Mol        di-          azotierte        1-Amino-4-benzoyl-amino-benzol-2-          carbonsäure    auf 1     Mol        5.5'-Dioxy-2.2'-dinaph-          thylamin-7.7'-disulfonsäure        einwirken    lässt.  



  Der neue Farbstoff stellt ein violettes  Pulver dar, das sich in Wasser oder konzen  trierter Schwefelsäure mit violetter Farbe  löst. Er färbt Baumwolle in violetten Tönen,  die durch Nachkupfern wasch- und lichtecht  werden.  



  <I>Beispiel:</I>  Man löst 25,6 Teile     1-Amino-4-benzoyl-          aminobenzol-2-carbonsäure    in 14 Teilen 30%  iger Natronlauge und 130 Teilen Wasser und  fügt 7 Teile     Natriumnitrit    zu. Diese Lösung  giesst man bei 5-10  in eine Mischung von  40 Teilen 30%iger Salzsäure und Eis und  rührt eine Stunde. Den erhaltenen     Diazobrei     giesst man in eine mit Eis auf 5  gekühlte Lö-         sung    von 16,1 Teilen     5.5'-Dioxy-2.2'-dinaph-          1,hylamin-7.7"-disulfonsäure    und 25 Teilen       Natriumcarbonat    in 100 Teilen Wasser.

   Nach  erfolgter Kupplung     wird    der Farbstoff aus  gesalzen, filtriert und getrocknet.



  Process for the preparation of a new disazo dye. It has been found that a new disazo dye is obtained if 2 moles of diacotized 1-amino-4-benzoyl-aminobenzene-2-carboxylic acid are added to 1 mole of 5.5'-dioxy-2.2'-dinaphthylamine-7.7 ' -disulfonic acid can act.



  The new dye is a purple powder that dissolves in water or concentrated sulfuric acid with a purple color. It dyes cotton in violet tones, which can be washed and lightfast by re-coppering.



  <I> Example: </I> 25.6 parts of 1-amino-4-benzoyl-aminobenzene-2-carboxylic acid are dissolved in 14 parts of 30% strength sodium hydroxide solution and 130 parts of water, and 7 parts of sodium nitrite are added. This solution is poured into a mixture of 40 parts of 30% strength hydrochloric acid and ice at 5-10 and stirred for one hour. The resulting diazo slurry is poured into a solution, cooled to 5 with ice, of 16.1 parts of 5.5'-dioxy-2.2'-dinaph-1, hylamine-7.7 "-disulfonic acid and 25 parts of sodium carbonate in 100 parts of water.

   After coupling, the dye is salted out, filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Disazofarbstoffes, dadurch gekennzeichnet, dass man 2 Mol diazotierte 1-Amino-4-benzoyl- amino-benzol-2-carbonsäure auf 1 Mol 5.5'- Dioxy -2.2'-dinaphthylamin-7.7'-disulfonsäure einwirken lässt. Der neue Farbstoff stellt ein violettes Pulver dar, das sich in Wasser oder konzen trierter Schwefelsäure mit violetter Farbe löst. Er färbt Baumwolle in violetten Tönen, die durch Nachkupfern wasch- und lichtecht werden. Claim: Process for the preparation of a new disazo dye, characterized in that 2 mol of diazotized 1-amino-4-benzoylamino-benzene-2-carboxylic acid are acted on 1 mol of 5.5'-dioxy-2.2'-dinaphthylamine-7.7'-disulfonic acid leaves. The new dye is a purple powder that dissolves in water or concentrated sulfuric acid with a purple color. It dyes cotton in violet tones, which can be washed and lightfast by re-coppering.
CH238336D 1943-06-29 1943-06-29 Process for the preparation of a new disazo dye. CH238336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH238336T 1943-06-29

Publications (1)

Publication Number Publication Date
CH238336A true CH238336A (en) 1945-07-15

Family

ID=4460541

Family Applications (1)

Application Number Title Priority Date Filing Date
CH238336D CH238336A (en) 1943-06-29 1943-06-29 Process for the preparation of a new disazo dye.

Country Status (1)

Country Link
CH (1) CH238336A (en)

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