CH152508A - Process for the preparation of a dye of the anthraquinone series. - Google Patents

Process for the preparation of a dye of the anthraquinone series.

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Publication number
CH152508A
CH152508A CH152508DA CH152508A CH 152508 A CH152508 A CH 152508A CH 152508D A CH152508D A CH 152508DA CH 152508 A CH152508 A CH 152508A
Authority
CH
Switzerland
Prior art keywords
gray
dye
acid
anthraquinone series
violet
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH152508A publication Critical patent/CH152508A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines Farbstoffes der     Anthr        aehinonreihe.       Das vorliegende Verfahren betrifft die  Darstellung eines grauen Farbstoffes der     An-          thrachinonreihe,    darin bestehend, dass man  ein Salz der     1-Amino-2,4-dibromanthrachinon-          5-sulfosäure    mit     p-Phenylendiamin    in Gegen  wart von Kupferverbindungen und säurebin  denden Mitteln kondensiert und die erhaltene       Farbstoffbase    solange mit     Sulfit    behandelt,  bis das     f-ständige    Bromatom vollständig durch  eine     Sulfogruppe    ersetzt wird.

    



  <I>Beispiel:</I>  23 Teile     1-amino-2,4-dibrom-5-anthrachi-          norisulfosaures    Kalium werden mit 250 Tei  len Wasser, 8 Teilen     p-Phenylendiamin,    6  Teilen     Natriumcarbonat,    1,5 Teilen Kupfer  sulfat kristallisiert solange erhitzt, bis das  Bromatom in     4-Stellung    vollständig durch  den     p-Phenylendiaminrest    ersetzt ist.

   Die  entstandene     Farbstoffsulfosäure    wird durch  Ansäuern gefällt und solange mit     Kalium-          stilfit    erhitzt, bis das Bromatom in     2-Stellung     durch eine     Sulfogruppe    vollständig ersetzt    wird. Der entstandene     Farbstoff    wird durch       Aussahen    aus der Lösung isoliert.  



  Er besitzt die Formel  
EMI0001.0025     
    und stellt in trockenem Zustande ein schwar  zes Pulver dar, welches in Wasser mit schmut  zig violetter Farbe, in konzentrierter Schwe  felsäure mit     violettgrauer    Farbe, welche auf  Zusatz von Borsäure blaugrau wird, löslich  ist. In kaltem Äthylalkohol ist er unlöslich.  Er färbt     ungebeizte    Wolle aus saurem Bade  in grünlich grauen Tönen an, welche durch       Chromieren    in ein bläuliches Grau übergehen.



  Process for the preparation of a dye of the anthraquinone series. The present process relates to the preparation of a gray dye of the anthraquinone series, consisting in condensing a salt of 1-amino-2,4-dibromoanthraquinone-5-sulfonic acid with p-phenylenediamine in the presence of copper compounds and acid-binding agents the dye base obtained is treated with sulfite until the f-position bromine atom is completely replaced by a sulfo group.

    



  <I> Example: </I> 23 parts of 1-amino-2,4-dibromo-5-anthrachinorisulphonic acid potassium are sulphate with 250 parts of water, 8 parts of p-phenylenediamine, 6 parts of sodium carbonate, 1.5 parts of copper crystallizes heated until the 4-position bromine is completely replaced by the p-phenylenediamine radical.

   The resulting dye sulfonic acid is precipitated by acidification and heated with potassium stilfit until the bromine atom in position 2 is completely replaced by a sulfo group. The resulting dye is isolated from the solution by looking.



  He owns the formula
EMI0001.0025
    and when dry it is a black powder which is soluble in water with a dirty violet color, in concentrated sulfuric acid with a violet-gray color, which becomes blue-gray on the addition of boric acid. It is insoluble in cold ethyl alcohol. He dyes unstained wool from an acid bath in greenish-gray tones, which turn into a bluish gray through chroming.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines grauen Farbstoffes der Anthrachinonreihe, dadurch gekennzeichnet; dass man ein Salz der 1 Amino - 2,4 - dibromanthrachinon - 5 - sulfosäure mit p-Phenylendiamin in Gegenwart von Kupferverbindungen und säurebindenden Mit teln kondensiert und die erhaltene Farbstofl- base solange mit Sulfit behandelt, bis das ss-ständige Bromatom vollständig durch eine Sulfogruppe ersetzt wird. PATENT CLAIM: Process for the representation of a gray dye of the anthraquinone series, characterized in that; that a salt of 1 amino - 2,4 - dibromoanthraquinone - 5 - sulfonic acid is condensed with p-phenylenediamine in the presence of copper compounds and acid-binding agents and the dye base obtained is treated with sulfite until the ss-bromine atom completely through a Sulfo group is replaced. Der neue Farbstoff besitzt die Formel EMI0002.0011 und stellt in trockenem Zustande ein schwar zes Pulver dar, welches in Wasser mit schmutzig violetter Farbe; in konzentrierter Schwefelsäure mit violettgrauer Farbe, welche auf Zusatz von Borsäure blaugrau wird, lös lich ist. In kaltem Äthylalkohol ist er (in- löslich. Er färbt ungebeizte Wolle aus sau rem Bade in grünlich grauen Tönen an, welche durch Chromieren in ein bläuliches Grau übergeben, The new dye has the formula EMI0002.0011 and when dry it is a black powder, which in water has a dirty violet color; in concentrated sulfuric acid with a violet-gray color, which turns blue-gray on the addition of boric acid, is soluble. It is insoluble in cold ethyl alcohol. It stains unstained wool from an acid bath in greenish-gray tones, which turn into a bluish gray when chromed.
CH152508D 1929-10-04 1930-09-27 Process for the preparation of a dye of the anthraquinone series. CH152508A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE152508X 1929-10-04
CH149419T 1930-09-27

Publications (1)

Publication Number Publication Date
CH152508A true CH152508A (en) 1932-01-31

Family

ID=25715431

Family Applications (1)

Application Number Title Priority Date Filing Date
CH152508D CH152508A (en) 1929-10-04 1930-09-27 Process for the preparation of a dye of the anthraquinone series.

Country Status (1)

Country Link
CH (1) CH152508A (en)

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