CH118898A - Process for the preparation of a brown leather dye. - Google Patents

Process for the preparation of a brown leather dye.

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Publication number
CH118898A
CH118898A CH118898DA CH118898A CH 118898 A CH118898 A CH 118898A CH 118898D A CH118898D A CH 118898DA CH 118898 A CH118898 A CH 118898A
Authority
CH
Switzerland
Prior art keywords
brown
preparation
dye
leather
leather 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 CH118898A publication Critical patent/CH118898A/en

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Description

  

  Verfahren zur Darstellung eines braunen Lederfarbstoffes.    Es wurde gefunden,     dass    ein wertvoller  brauner Lederfarbstoff von sehr guten       Eehtheitseigenschaften    entsteht, wenn man    4<B>-</B>     Nitro   <B>-</B> 4"<B>-</B>     aminotolylplienylamin-2-sulio-          säure    auf     Toluchinon    einwirken     lässt.     



  Die Bildung des Farbstoffes findet ge  mäss folgender Gleichung statt:  
EMI0001.0008     
    <I>Beispiel:</I>  <B>32,3</B> Teile     4-Nitro-4-aminotolylphenyl-          amin-2-sulfosauresNatrium    (erhältlich durch  einseitige Kondensation von     1-chlor-4-nitro-          benzol-2-sulfosaurem    Natrium mit     para-          Toll-tylendiamin)    werden mittelst<B>5,3</B> Teilen    Soda in<B>350</B> Teilen Wasser gelöst,<B>18</B> Teile       Toluchinon    zugegeben und das Gemisch  zwei Stunden auf dem Wasserbad unter  Rühren erwärmt.  



  Der Farbstoff wird mit Kochsalz ausge  fällt. Er bildet nach dem Trocknen ein dun-           kelbraunes    Pulver, das sieh in 'konzentrier  ter Schwefelsäure mit brauner Farbe löst.  



  Er gibt auf Wolle und Leder     grünstichig     braune Färbungen.



  Process for the preparation of a brown leather dye. It has been found that a valuable brown leather dye with very good fastness properties is produced if 4 <B> - </B> Nitro <B> - </B> 4 "<B> - </B> aminotolylplienylamine-2-sulio - lets acid act on toluquinone.



  The formation of the dye takes place according to the following equation:
EMI0001.0008
    <I> Example: </I> <B> 32.3 </B> parts of 4-nitro-4-aminotolylphenylamine-2-sulfonic acid sodium (obtainable by one-sided condensation of 1-chloro-4-nitrobenzene-2 -sulphonic acid sodium with para-toll-tylenediamine) are dissolved using <B> 5.3 </B> parts of soda in <B> 350 </B> parts of water, <B> 18 </B> parts of toluquinone are added and that The mixture was heated for two hours on a water bath while stirring.



  The dye is precipitated out with common salt. After drying it forms a dark brown powder, which dissolves in concentrated sulfuric acid with a brown color.



  It gives greenish brown colorations to wool and leather.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines brau nen Lederfarbstoffes, dadurch gekennzeich net, dass man 4-Nitro-V-aminotolylphen.v1- amin-2-sulfosäure (erhältlich durch einsei tige Kondensation von 1-chlor-4-nitroben- zol-2-sulio,.aurem Natrium mit p-Toluylen- diamin) auf Toluchinon einwirken lässt. Der Farbstoff bildet nach dem Trock- ilen ein dunkelbraunes Pulver, das sich in konzentrierter Schwefelsäure mit brauner Farbe löst. PATENT CLAIM: Process for the preparation of a brown leather dye, characterized in that 4-nitro-V-aminotolylphen.v1-amine-2-sulfonic acid (obtainable by one-sided condensation of 1-chloro-4-nitrobenzene-2- sulio, acidic sodium with p-toluylenediamine) can act on toluquinone. After drying, the dye forms a dark brown powder that dissolves in concentrated sulfuric acid with a brown color. Auf Wolle und Leder gibt er grünstichig braune Färbungen von sehr gu ten Echtheitseigenschaften. On wool and leather, it gives greenish brown dyeings with very good fastness properties.
CH118898D 1923-07-23 1924-07-08 Process for the preparation of a brown leather dye. CH118898A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE118898X 1923-07-23
CH111566T 1924-07-08

Publications (1)

Publication Number Publication Date
CH118898A true CH118898A (en) 1927-02-01

Family

ID=25707889

Family Applications (1)

Application Number Title Priority Date Filing Date
CH118898D CH118898A (en) 1923-07-23 1924-07-08 Process for the preparation of a brown leather dye.

Country Status (1)

Country Link
CH (1) CH118898A (en)

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