CH192762A - Process for the preparation of a water-soluble dye. - Google Patents

Process for the preparation of a water-soluble dye.

Info

Publication number
CH192762A
CH192762A CH192762DA CH192762A CH 192762 A CH192762 A CH 192762A CH 192762D A CH192762D A CH 192762DA CH 192762 A CH192762 A CH 192762A
Authority
CH
Switzerland
Prior art keywords
water
preparation
dye
soluble dye
soluble
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 CH192762A publication Critical patent/CH192762A/en

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  • Coloring (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

  

  Verfahren     zür    Darstellung eines     wasserlösliehen    Farbstoffes.         Gegenstand    ödes vorliegenden Zusatz  patentes ist ein Verfahren zur Darstellung       eines        wasserlöslichen    Farbstoffes, welches  darin besteht, dass man den durch Kuppeln  von     diazotierter        1-Amino-2-ogybenzol-5-sul-          fonsäure    mit     Metaphenylendiamin    erhält  lichen     Diaminoazofarbstoff    mit     Chloranil     durch     Kondensation    verknüpft.

      <I>Beispiel:</I>  330     Gewichtsteile    des     Diaminoazofarb-          stoffes,    den man durch Kuppeln von     diazo-          tierter        1-Amino-2-oxybenzol-5-sulfonsäure          mit        m-Phenylendiamin    erhält, werden     in     3000     Gewichtsteilen    Wasser gelöst und mit  123     Gewichtsteilen        Chloranil    und 130 Ge  wichtsteilen     caloiniertem    Natriumkarbonat  versetzt.

   Das, Ganze     wird    10 Stunden     bei    50       bis    55   C verrührt. Die     ursprünglich    gelbrote       Lösung    färbt sich     tief    braun. Man filtriert       heiss    und dampft     das    Filtrat zur Trockne ein.    Es werden     etwa    400     Gewichtsteile    Farbstoff       erhalten.     



  Der so erhaltene     Farbstoff    stellt ein  braunes Pulver dar, .das in Wasser löslich ist  und Leder tief braun einfärbt.



  Process for the preparation of a water-soluble dye. The subject of the present additional patent is a process for the preparation of a water-soluble dye which consists in linking the diaminoazo dye obtained by coupling diazotized 1-amino-2-ogybenzene-5-sulphonic acid with metaphenylenediamine with chloranil by condensation.

      <I> Example: </I> 330 parts by weight of the diaminoazo dye, which is obtained by coupling diazotized 1-amino-2-oxybenzene-5-sulfonic acid with m-phenylenediamine, are dissolved in 3000 parts by weight of water and treated with 123 Parts by weight of chloranil and 130 parts by weight of caloinated sodium carbonate are added.

   The whole is stirred at 50 to 55 ° C. for 10 hours. The originally yellow-red solution turns deep brown. It is filtered hot and the filtrate is evaporated to dryness. About 400 parts by weight of dye are obtained.



  The dye obtained in this way is a brown powder that is soluble in water and dyes leather deep brown.

Claims (1)

PATENTANSPRÜCH: Verfahren zur Darstellung eines wasser löslichen Farbstoffes, dadurch gekennzeich net, dass. man den durch Kuppeln von diano tierter 1-Amino-2-ogybenzol-5-sulfonsäure mit m-Phenylendiamin erhältlichen Diamino- azofarbstoff mit Chloranil durch Kondensa. tion verknüpft. PATENT CLAIM: Process for the preparation of a water-soluble dye, characterized in that the diamino-azo dye obtainable by coupling diano-2-ogybenzene-5-sulfonic acid with m-phenylenediamine is obtained with chloranil by condensate. tion linked. Der so erhaltene Farbstoff .stellt ein braunes Pulver dar, dass in Wasser löslich ist und Leder tief braun einfärbt. The dye obtained in this way represents a brown powder that is soluble in water and dyes leather deep brown.
CH192762D 1934-12-29 1935-12-20 Process for the preparation of a water-soluble dye. CH192762A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE192762X 1934-12-29
CH187693T 1935-12-20

Publications (1)

Publication Number Publication Date
CH192762A true CH192762A (en) 1937-08-31

Family

ID=25721567

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192762D CH192762A (en) 1934-12-29 1935-12-20 Process for the preparation of a water-soluble dye.

Country Status (1)

Country Link
CH (1) CH192762A (en)

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