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CH204138A - 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
CH204138A
CH204138A CH204138DA CH204138A CH 204138 A CH204138 A CH 204138A CH 204138D A CH204138D A CH 204138DA CH 204138 A CH204138 A CH 204138A
Authority
CH
Switzerland
Prior art keywords
water
disazo dye
preparation
dye
aminobenzene
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 CH204138A publication Critical patent/CH204138A/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

  

  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-          Dioxybenzol    mit 1     Mol.        diazotierter        4-Amino-          benzol    - 1 -     methyltaurin    - 2 -     sulfonsäure    und  1     Mol.        diazotierter        4-Nitro-1-aminobenzol-2-          sulfonsäure    vereinigt.  



       Beispiel:     Die aus 31,2 Gewichtsteilen     4-Aminoben-          zol-l-methyltaurin-2-sulfonsäure    (M. G.<B>312)</B>  von der folgenden Formel:  
EMI0001.0019     
    in der üblichen Weise hergestellte wässerige  Lösung der     Diazoverbindung    fliesst bei 0   C  unter Rühren in eine wässerige Lösung von  11     Gewichtsteilen        1,3-Dioxybenzol    (M. G.

    110)     in        Gegenwart    von     Natriumearbonart,       Nach beendeter Kupplung fliesst zu dem ge  bildeten Farbstoff allmählich eine aus 21,8  Gewichtsteilen     4-Nitro-1-aminobenzol-    2     -sul-          fonsäure    (M. G. 218) erhaltene     Diazosuspen:-          sion.    In     sodaalkalischem    Medium ist die Bil  dung des     Disazofarbstoffes    sehr rasch been  det. Der Farbstoff     wird        ausgesalzen,        isoliert     und getrocknet.

   Er bildet ein     schwarzbraunes     Pulver, das sich     in    Wasser mit rötlich hell  brauner Farbe löst.  



       Ostindisches    Schafleder wird nach dem       Aufwalken    mit 100 g des Farbstoffes für  12 Felle gefärbt. Nach einer     Walkdauer    von  50 Minuten werden dem Bade 50 g Ameisen  säure 85     %ig    zugefügt. Die Leder sind röt  lich hellbraun gefärbt und werden auf üb  liche Weise zugerichtet. Sie lassen sich nach  dem Trocknen schleifen und für     Velour-          effekte        verwenden.  



  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 combined with 1 mole of diazotized 4-aminobenzene-1-methyltaurine-2-sulfonic acid and 1 mole of diazotized 4-nitro-1-aminobenzene-2-sulfonic acid.



       Example: The from 31.2 parts by weight of 4-aminobenzene-1-methyltaurine-2-sulfonic acid (M. G. <B> 312) </B> of the following formula:
EMI0001.0019
    Aqueous solution of the diazo compound prepared in the usual way flows at 0 ° C. with stirring into an aqueous solution of 11 parts by weight of 1,3-dioxybenzene (M. G.

    110) in the presence of sodium carbonate. After the coupling has ended, a diazosuspene obtained from 21.8 parts by weight of 4-nitro-1-aminobenzene-2-sulfonic acid (M.G. 218) gradually flows into the dye formed: - sion. In a soda-alkaline medium, the formation of the disazo dye ends very quickly. The dye is salted out, isolated and dried.

   It forms a black-brown powder that dissolves in water with a reddish light brown color.



       East Indian sheepskin is dyed with 100 g of the dye for 12 pelts after being drummed on. After a drumming time of 50 minutes, 50 g of 85% formic acid are added to the bath. The leather is colored reddish light brown and finished in the usual way. After drying, they can be sanded and used for velor effects.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser löslichen Disazofarbstoffes, dadurch gekenn,- zeichnet, dass dan 1,3-Dioxybenzel mit 1 31o1. diazotierter 4-Aminobenzol-l-methyltaurin-2- sulfonsäure und 1 31o1. diazotierter 4-Nitro-1- aminobenzol-2-sulfonsäure vereinigt. PATENT CLAIM: Process for the production of a water-soluble disazo dye, characterized in that 1,3-Dioxybenzel with 1 31o1. diazotized 4-aminobenzene-1-methyltaurine-2-sulfonic acid and 1 31o1. diazotized 4-nitro-1-aminobenzene-2-sulfonic acid combined. Der so erhaltene Farbstoff bildet ein schwarzbraunes Pulver, das sich in Wasser mit rötlich hellbr:@uner Farbe löst und Leder in rö tlieh hellbraunen Tönen einfärbt. The dye obtained in this way forms a black-brown powder which dissolves in water with a reddish light brown color and dyes leather in red light brown tones.
CH204138D 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye. CH204138A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE204138X 1936-09-04
CH200675T 1938-10-31

Publications (1)

Publication Number Publication Date
CH204138A true CH204138A (en) 1939-04-15

Family

ID=25723559

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204138D CH204138A (en) 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye.

Country Status (1)

Country Link
CH (1) CH204138A (en)

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