CH190906A - Process for the preparation of a leather dye. - Google Patents

Process for the preparation of a leather dye.

Info

Publication number
CH190906A
CH190906A CH190906DA CH190906A CH 190906 A CH190906 A CH 190906A CH 190906D A CH190906D A CH 190906DA CH 190906 A CH190906 A CH 190906A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
leather
leather dye
nitro
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 CH190906A publication Critical patent/CH190906A/en

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Description

  

  Verfahren zur Darstellung eines Lederfarbstoffes.    Gegenstand des vorliegenden Zusatzpa  tentes ist ein     Verfahren.zur    Darstellung eines       Lederfarbstoffes,    welches dadurch gekenn  zeichnet ist, dass man 2     Mol        4-Nitro-3'-          aminodipherrylamin-2,4'-disulfosäure    mit     11M1          Chloranil    kondensiert.  



  <I>Beispiel:</I>  Zu einer     wässrigen    Lösung des Natrium  salzes der     4-Nitro-3'-amirrodipherryl-2,4'-disul-          fosäure,    erhalten durch Kondensation von  19 Gewichtsteilen 1,3-Diaminoberrzol-4-sulfo-    säure mit 26 Gewichtsteilen     4-Nitro-l-chlor-          benzol=2-sulfonsaurem    Natrium, werden unter  Rühren 12 Gewichtsteile     Chloranil    und 6 Ge  wichtsteile Soda gegeben. Die Masse wird  20 Stunden lang im Sieden erhalten. Die so  entstandene tiefbraune Lösung wird zur  Trockne eingedampft, wobei 55-60 Gewichts  teile eines Produktes entstehen, das zum  Färben von Leder in braunen Tönen geeignet  ist.

   Der Farbstoff hat folgende Zusammen  setzung:  
EMI0001.0014     
    Der so erhaltene     Farbstoff    hat die wert  volle Eigenschaft, Leder bis tief in den Kern  hinein zu färben.



  Process for the preparation of a leather dye. The subject of the present additional patent is a method for the preparation of a leather dye, which is characterized in that 2 mol of 4-nitro-3'-aminodipherrylamine-2,4'-disulfonic acid are condensed with 11M1 chloranil.



  <I> Example: </I> To an aqueous solution of the sodium salt of 4-nitro-3'-amirrodipherryl-2,4'-disulfonic acid, obtained by condensation of 19 parts by weight of 1,3-diaminoberrzene-4-sulfo - Acid with 26 parts by weight of 4-nitro-1-chlorobenzene = 2-sulfonic acid sodium, 12 parts by weight of chloranil and 6 parts by weight of soda are added with stirring. The mass is kept boiling for 20 hours. The resulting deep brown solution is evaporated to dryness, 55-60 parts by weight of a product that is suitable for dyeing leather in brown tones.

   The dye has the following composition:
EMI0001.0014
    The dye obtained in this way has the valuable property of dyeing leather deep into the core.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Leder farbstoffes, dadurch gekennzeichnet, dass man 2 Mol 4-Nitro-3'-aminodiphenylamin-2,4'-di- sulfonsäure mit 1 Mol Chloranil kondensiert. Der so erhaltene Farbstoff hat die wert volle Eigenschaft, Leder bis tief in den Bern hinein zu färben. Claim: Process for the preparation of a leather dye, characterized in that 2 moles of 4-nitro-3'-aminodiphenylamine-2,4'-disulfonic acid are condensed with 1 mole of chloranil. The dye obtained in this way has the valuable property of dyeing leather deep into the amber.
CH190906D 1934-11-30 1935-11-27 Process for the preparation of a leather dye. CH190906A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE190906X 1934-11-30
CH188323T 1935-11-27

Publications (1)

Publication Number Publication Date
CH190906A true CH190906A (en) 1937-05-15

Family

ID=25721633

Family Applications (1)

Application Number Title Priority Date Filing Date
CH190906D CH190906A (en) 1934-11-30 1935-11-27 Process for the preparation of a leather dye.

Country Status (1)

Country Link
CH (1) CH190906A (en)

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