CH204149A - Process for the preparation of a water-soluble disazo dye. - Google Patents

Process for the preparation of a water-soluble disazo dye.

Info

Publication number
CH204149A
CH204149A CH204149DA CH204149A CH 204149 A CH204149 A CH 204149A CH 204149D A CH204149D A CH 204149DA CH 204149 A CH204149 A CH 204149A
Authority
CH
Switzerland
Prior art keywords
water
disazo dye
preparation
soluble disazo
dye
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 CH204149A publication Critical patent/CH204149A/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
    • C09B33/04—Disazo dyes in which the coupling component is a dihydroxy or polyhydroxy compound

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent     lZr.   <B>200675.</B>    Verfahren zur     Rerstellung    eines wasserlöslichen     Disazofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       wa-sserlöslichen        Disazofarbstoffes,    welches  dadurch gekennzeichnet ist,     dass    man     1,3-          Dioxybenzol,    mit<B>1</B>     Mol.        diazotierter        4-Amino-          1-benzylsulio,

  nsäure    und.<B>1</B>     Mol.        diazotierter          2-Amino-l-benzylsulfo,nsäure    vereinigt.  



  <I>Beispiel:</I>  Die aus<B>18,7</B>     Gewiehtsteilen        4-Amino-l-          benzylsulfonsäure    in der üblichen Weise her  gestellte wässerige Lösung der     Diazoverbin-          dung    fliesst bei<B>0 ' C</B> unter Rühren in eine  wässerige Lösung von<B>11</B> Gewichtsteilen     1,3-          Dioxybenzol    in Gegenwart von     Natrium-          carbona,t.    Nach beendeter Kupplung fliesst  zu dem gebildeten Farbstoff allmählich eine  <I>aus</I><B>18,

  7</B>     Gewichtsteilen        2-Amino-l-benzyl-          sulfonsäure    erhaltene     Diazosuspension.    In       sodaall-,alise,liem    Medium ist die Bildung des       Disazofarbstoffes    rasch beendet. Der Farb-         stoff    wird     ausgesalzen,    isoliert und ge  trocknet.  



  Er bildet ein dunkelbraunes Pulver, das  sieh in Wasser mit brauner Farbe löst und  Leder in     rötlie,1-i    braunen Tönen gut einfärbt.



  Additional patent to the main patent lZr. <B> 200675. </B> Process for the preparation of a water-soluble disazo dye. The subject of the present additional patent is a process for the production of a water-soluble disazo dye, which is characterized in that 1,3-dioxybenzene, with <B> 1 </B> mol. 4-Amino-1-benzylsulio diazotized,

  Acid and 1 mol of diazotized 2-amino-1-benzylsulfonic acid combined.



  <I> Example: </I> The aqueous solution of the diazo compound produced in the customary manner from <B> 18.7 </B> parts by weight of 4-amino-1-benzylsulfonic acid flows at <B> 0 'C < / B> while stirring in an aqueous solution of <B> 11 </B> parts by weight of 1,3-dioxybenzene in the presence of sodium carbona, t. After the coupling has ended, an <I>aus</I> <B> 18 gradually flows to the dye formed,

  7 parts by weight of 2-amino-1-benzylsulfonic acid diazo suspension obtained. In sodaall, alise, liem medium the formation of the disazo dye is quickly completed. The dye is salted out, isolated and dried.



  It forms a dark brown powder which dissolves in water with a brown color and dyes leather well in reddish, 1-brown tones.

Claims (1)

PATENTANSPRUCH: -Verfahren zur Herstellung eines wasser löslichen Disazofarbstoffes, dadurch gekenn zeichnet, dass man 1,3-Dioxybenzol mit<B>1</B> Mol. diazotierter 4-Amino-l-benzylsulfonsä;me und <B>1</B> Mol. diazotierter 2-Amino-l-benzylsulfon- säure vereinigt. Der so erhaltene Farbstoff bildet ein dun kelbraunes Pulver, das sich in Wasser mit brauner Farbe löst und Leder in rötlich brau nen Tönen gut einfärbt. PATENT CLAIM: Process for the production of a water-soluble disazo dye, characterized in that 1,3-dioxybenzene is mixed with 1 mol of diazotized 4-amino-1-benzylsulfonic acids and 1 B> Mol. Of diazotized 2-amino-1-benzylsulfonic acid combined. The dye thus obtained forms a dark brown powder which dissolves in water with a brown color and dyes leather well in reddish brown tones.
CH204149D 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye. CH204149A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE204149X 1936-09-04
CH200675T 1938-10-31

Publications (1)

Publication Number Publication Date
CH204149A true CH204149A (en) 1939-04-15

Family

ID=25723570

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204149D CH204149A (en) 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye.

Country Status (1)

Country Link
CH (1) CH204149A (en)

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