CH99675A - Process for the preparation of a black azo dye. - Google Patents

Process for the preparation of a black azo dye.

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Publication number
CH99675A
CH99675A CH99675DA CH99675A CH 99675 A CH99675 A CH 99675A CH 99675D A CH99675D A CH 99675DA CH 99675 A CH99675 A CH 99675A
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CH
Switzerland
Prior art keywords
black
water
azo dye
preparation
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Griesheim-Elektron Chem Fabrik
Original Assignee
Griesheim Elektron Chem Fab
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 Griesheim Elektron Chem Fab filed Critical Griesheim Elektron Chem Fab
Publication of CH99675A publication Critical patent/CH99675A/en

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Description

  

  Verfahren zur Darstellung eines schwarzen     Azofarbstoffes.       Es -wurde gefunden,     dass    man einen  schwarzen Farbstoff erhält, wenn man die       Diazoverbindung    des     p-Aminoazohörpers    aus       diazotiertem        Aminoliydrochinondimetliyliit-her     <B>+</B>     a-Naplityl,#t-min    mit 2     -3-Oxyiiaphtoesäure-          P-n#i,plita.Iid    kombiniert.  



  Getrocknet bildet der Farbstoff ein  schwarzes, metallglänzendes Pulver, das in  Wasser unlöslich, in konzentrierter Schwefel  säure mit blauer Farbe löslich ist und aus  dieser Lösung durch Wasser in schwarzen  Flocken gefällt     wirfl.    Er kann aber auch auf  der Faser erzeugt werden und liefert dann       sel)warze    Färbungen von hervorragenden       Eolitheitseigenseliaften.   <B>--</B>  <I>Beispiel:

  </I>  <B>30,7</B> Teile des     p-Aiiiiiio,-tzohörpers    aus       diazotiertem        A.iniiiohydrocliinoiidimethyläther     <B>1-</B>     a-Nial)htylamin    werden in 40 Teilen Salz  säure 20' B6 und etwa 4500 Teilen Wasser  ,gelöst und mit<B>6,9</B> Teilen     Natriumnitrit    in  der üblichen Weise     diazotierf.    Die so     gebil-          flete        Diazover!)influng    wird durch Filtrieren    von geringen Verunreinigungen befreit.<B>31,

  3</B>  Teile 2     -3-Oxynaphtoesäure-ss-naplitalid    wer  den in 20 Teilen Natronlauge<B>36'</B> B6 und  <B>900</B> Teilen Wasser unter Zusatz einer wässe  rigen Lösung von<B>13</B> Teilen     Natriumacetat          mid    2 Teilen     Türkiselirotbl.    in der Wärme  gelöst, mit Eis auf zirka<B>10'</B> abgekühlt und  filtriert. Diese Lösung     lässt    man unter Rüh  ren bei<B>10</B> bis<B>15'</B> in die     Diazolbsung    ein  laufen.

   Nach Beendigung der Kupplung wird  der entstandene Farbstoff     abfiltriert.    Er  bildet ein metallisch glänzendes, schwarzes  Pulver, das sieh in konzentrierter     Schwefel-          sätire    mit blauer Farbe löst und durch Was  ser in schwarzen Flocken     ausgefälli    wird.



  Process for the preparation of a black azo dye. It has been found that a black dye is obtained if the diazo compound of the p-aminoazo body is obtained from diazotized aminolydroquinone dimethylitol-her <B> + </B> a-naplityl, # t-min with 2 -3-oxyiiaphthoic acid- Pn # i, plita.Iid combined.



  When dried, the dye forms a black, shiny metal powder that is insoluble in water, soluble in concentrated sulfuric acid with a blue color and precipitates from this solution in water in black flakes. It can, however, also be produced on the fiber and then provides even warm colorations with excellent properties of the elite. <B> - </B> <I> Example:

  </I> <B> 30.7 </B> parts of the p-Aiiiiiio, -tzo body from diazotized A.iniiiohydrocliinoiidimethylether <B> 1- </B> a-Nial) ethylamine are in 40 parts hydrochloric acid 20 'B6 and about 4500 parts of water, dissolved and diazotized with 6.9 parts of sodium nitrite in the usual way. Minor impurities are removed from the diazover! Inflation thus formed. <B> 31,

  3 parts of 2 -3-oxynaphthoic acid-ss-naplitalide are added to 20 parts of sodium hydroxide solution <B> 36 '</B> B6 and <B> 900 </B> parts of water with the addition of an aqueous solution of < B> 13 parts sodium acetate and 2 parts turquoise elirotbl. dissolved in the heat, cooled with ice to about <B> 10 '</B> and filtered. This solution is allowed to run into the diazole solution with stirring at <B> 10 </B> to <B> 15 '</B>.

   After the coupling has ended, the resulting dye is filtered off. It forms a black powder with a metallic sheen, which dissolves in concentrated sulfuric acid with a blue color, and which is precipitated in black flakes by water.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines schwar- zeu Azofarbstoffes, der getrocknet ein schwarzes, metallglänzendes Pulver bildet, das in Wasser unlöslich, in konzentrierter Schwefelsäure mit blauer Farbe löslicli ist und aus dieser Lösung mit. PATENT CLAIM: Process for the representation of a black azo dye which, when dried, forms a black, metallic powder which is insoluble in water, soluble in concentrated sulfuric acid with a blue color and from this solution with. -Wasser in sellwar- zen Flachen gefällt wird, der aueli auf der Faser erzeugt werden kann und dann ,schwarze Färbungen von hervorragenden Echtheifseigenschaften liefert, dadurch ge kennzeichnet, dass man die Diazoverbindung des p-Aminoazol#örpers aus diazotiertem AminohydrochinondimethylU,ther <B>+</B> a-Naph- tylamin mit 2<B>-</B> 3-Oxyna,phtoesäure-ss-naplita- lid kombiniert. Water is precipitated in warty areas, which can also be produced on the fiber and then provides black dyeings with excellent fastness properties, characterized in that the diazo compound of the p-aminoazole body is made from diazotized aminohydroquinone dimethyl U, ether + </B> a-naphthylamine combined with 2 <B> - </B> 3-oxyna, phtoic acid-ss-naplitalid.
CH99675D 1921-06-13 1922-06-12 Process for the preparation of a black azo dye. CH99675A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE99675X 1921-06-13
CH99283T 1922-06-12

Publications (1)

Publication Number Publication Date
CH99675A true CH99675A (en) 1923-06-16

Family

ID=25705529

Family Applications (1)

Application Number Title Priority Date Filing Date
CH99675D CH99675A (en) 1921-06-13 1922-06-12 Process for the preparation of a black azo dye.

Country Status (1)

Country Link
CH (1) CH99675A (en)

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