CH195541A - Process for the preparation of a water-soluble azo dye. - Google Patents

Process for the preparation of a water-soluble azo dye.

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Publication number
CH195541A
CH195541A CH195541DA CH195541A CH 195541 A CH195541 A CH 195541A CH 195541D A CH195541D A CH 195541DA CH 195541 A CH195541 A CH 195541A
Authority
CH
Switzerland
Prior art keywords
water
preparation
soluble azo
azo dye
mole
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 CH195541A publication Critical patent/CH195541A/en

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Description

  

  Verfahren zur Darstellung eines wasserlöslichen     Azofarbstoffes.       Gegenstand     ödes    vorliegenden Zusatz  patentes ist ein     Verfahren    zur Darstellung  eines wasserlöslichen     Azofarbstoffes,    welches  dadurch gekennzeichnet ist, dass man 1 Hol.

         Phloroglucin    mit 1     Mol.        diazotierter        5-          Aminoacenaphthen-$-sulfonsäure    und 1     Mol.          diazotierter        4-Amino-3-.        2'-.dimethyl-l.        l'-azo-          benzol-5    .     4'-@disulfonsäure    vereinigt.  



  <I>Beispiel:</I>  Die     Suspension    der aus 249 Gewichts  teilen     5-Aminoacenaphthen-8-sulfonsäure    er  haltenen     Diazoverbindung    wird bei 0   all  mählich in eine essigsauer     gestellte        wässrige     Lösung von 126 Gewichtsteilen     Phloroglucin     und 300     Gewichtoteilen    kristallisiertem     Na-          triumaeetat        unter        Rühren    gegeben.

   Nach be  endeter Kupplung wird die erhaltene Lösung       ,des        Monoazofarbstoffes    bei 0   C mit der       Diazoverbindung    aus 385     Gewichtsteilen        4-          Amino    - 3.     2'-,dimethyl-1    . 1'-     azobenzol-5    .     4'-          disulfonsäure    in Gegenwart von 400 Ge  wichtsteilen     calciniertem    Natriumkarbonat  langsam und unter Rühren versetzt. Die Bil-         dung    des     Trisazofarbstoffes    ist rasch beendet.  Der Farbstoff wird isoliert und .getrocknet.  



  Er bildet ein schwarzbraunes Pulver, das  sich in Wasser     mit    rotbrauner Farbe löst  und Leder in dunkelrotbraunen Tönen von       guten    Echtheitseigenschaften färbt.



  Process for the preparation of a water-soluble azo dye. The subject of the present additional patent is a method for the preparation of a water-soluble azo dye, which is characterized in that one Hol.

         Phloroglucinol with 1 mol. Of diazotized 5-aminoacenaphthene - $ - sulfonic acid and 1 mol. Of diazotized 4-amino-3-. 2 '-. Dimethyl-l. l'-azo-benzene-5. 4 '- @ disulfonic acid combined.



  <I> Example: </I> The suspension of the diazo compound obtained from 249 parts by weight of 5-aminoacenaphthene-8-sulfonic acid is gradually transferred at 0 to an aqueous solution of 126 parts by weight of phloroglucinol and 300 parts by weight of crystallized sodium acetate with stirring given.

   After coupling has ended, the solution obtained is the monoazo dye at 0 C with the diazo compound from 385 parts by weight of 4-amino - 3.2 '-, dimethyl-1. 1'-azobenzene-5. 4'-disulfonic acid in the presence of 400 parts by weight of calcined sodium carbonate is added slowly and with stirring. The formation of the trisazo dye ends quickly. The dye is isolated and dried.



  It forms a black-brown powder which dissolves in water with a red-brown color and dyes leather in dark red-brown shades with good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines wasser löslichen Azofarbstoffes,dadurch gekenn zeichnet, dass man 1 Mol. Phloroglucin mit 1 Mol. @diazotierter 5-Aminoacenaphthen-8- sulfonsäure und 1 Mol. diazotierter 4-Amino- 3. 2'-, PATENT CLAIM: Process for the preparation of a water-soluble azo dye, characterized in that 1 mole of phloroglucinol is mixed with 1 mole of diazotized 5-aminoacenaphthene-8-sulfonic acid and 1 mole of diazotized 4-amino-3. 2'-, dimethyl-1. 1'-azobenzol-5. 4'-disulfon- säure vereinigt. Der so erhaltene Farbstoff bildet ein schwarzbraunes Pulver, das sich in Wasser mit rotbrauner Farbe löst und Leder in Üun- kelrotbraunen Tönen von guten Echtheits- eigenschaften färbt. dimethyl-1. 1'-azobenzene-5. 4'-disulfonic acid combined. The dye thus obtained forms a black-brown powder which dissolves in water with a red-brown color and dyes leather in dark red-brown shades with good fastness properties.
CH195541D 1935-06-29 1936-06-24 Process for the preparation of a water-soluble azo dye. CH195541A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE195541X 1935-06-29
CH192371T 1936-06-24

Publications (1)

Publication Number Publication Date
CH195541A true CH195541A (en) 1938-01-31

Family

ID=25722269

Family Applications (1)

Application Number Title Priority Date Filing Date
CH195541D CH195541A (en) 1935-06-29 1936-06-24 Process for the preparation of a water-soluble azo dye.

Country Status (1)

Country Link
CH (1) CH195541A (en)

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