CH204145A - 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
CH204145A
CH204145A CH204145DA CH204145A CH 204145 A CH204145 A CH 204145A CH 204145D A CH204145D A CH 204145DA CH 204145 A CH204145 A CH 204145A
Authority
CH
Switzerland
Prior art keywords
water
preparation
disazo dye
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 CH204145A publication Critical patent/CH204145A/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

  

  <B>Zusatzpatent</B> zum     Hauptpatent    Nr. 200675.    Verfahren zur Herstellung eines wasserlöslichen     Disazofarbstoffes.       Gegenstand des     vorliegenden    Zusatzpaten  tes     ist    ein Verfahren zur Herstellung eines  wasserlöslichen     Disazofarbstoffes,    welches  dadurch gekennzeichnet ist, dass man 1,3  Diogybenzol mit 2     Mol.        diazotierter        3-Amino-          1-benzylsulfonsäure    vereinigt.  



  <I>Beispiel:</I>  37,4 Gewichtsteile     8-Amino-l-benzylsul-          fonsäure    werden in 350     Volumteilen    Wasser  mit der     berechneten    Menge     Natriumcarbonat     unter     Überführung    in das     Natriumsalz    in  Lösung gebracht.

   Diese Lösung wird mit 50       Volumteilen    Salzsäure von 20'     B6    versetzt  und bei 0   C mit 13,8 Gewichtsteilen Na  triumnitrit     diazotiert.    Die erhaltene     Diazo-          verbindung    fliesst nun bei 0   C unter Rühren  allmählich in eine wässerige Lösung von 11       Gewichtsteilen        1,3-Diogybenzol    (M. G. 110)  in     Gegenwart    von überschüssigem Natrium-         carbonat.    Nach beendeter Kupplung     wird    der  gebildete Farbstoff     ausgesalzen,    abgesaugt  und     getrocknet.     



  Er bildet ein     dunkelbraunes    Pulver, das  sich in Wasser mit     brauner    Farbe löst und  Leder in     rötlichbraunen    Tönen gut einfärbt.



  <B> Additional patent </B> to main patent no. 200675. Process for the production 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-diogybenzene is combined with 2 moles of diazotized 3-amino-1-benzylsulfonic acid.



  <I> Example: </I> 37.4 parts by weight of 8-amino-1-benzylsulphonic acid are dissolved in 350 parts by volume of water with the calculated amount of sodium carbonate, converting it into the sodium salt.

   This solution is mixed with 50 parts by volume of hydrochloric acid of 20 'B6 and diazotized at 0 C with 13.8 parts by weight of sodium nitrite. The diazo compound obtained now flows gradually at 0 C with stirring into an aqueous solution of 11 parts by weight of 1,3-diogybenzene (M.G. 110) in the presence of excess sodium carbonate. After the coupling is complete, the dye formed is salted out, filtered off with suction and dried.



  It forms a dark brown powder that dissolves in water with a brown color and colors leather well in reddish brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser löslichen Disazofarbstoffes, dadurch gekenn zeichnet, dass man 1,3-Diogybenzol mit 2 Mol. diazotierter 3-Amino-l-benzylsulfonsäure ver einigt. Der so erhaltene Farbstoff bildet ein dun kelbraunes Pulver, das sich in Wasser mit brauner Farbe löst und Leder in rötlichbrau- nen Tönen gut einfärbt. PATENT CLAIM: Process for the preparation of a water-soluble disazo dye, characterized in that 1,3-diogybenzene is combined with 2 moles of diazotized 3-amino-l-benzylsulfonic acid. The dye obtained in this way forms a dark brown powder which dissolves in water with a brown color and dyes leather well in reddish-brown tones.
CH204145D 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye. CH204145A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE204145X 1936-09-04
CH200675T 1938-10-31

Publications (1)

Publication Number Publication Date
CH204145A true CH204145A (en) 1939-04-15

Family

ID=25723566

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204145D CH204145A (en) 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye.

Country Status (1)

Country Link
CH (1) CH204145A (en)

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