CH184187A - Process for the preparation of a dye of the anthraquinone series. - Google Patents

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

Info

Publication number
CH184187A
CH184187A CH184187DA CH184187A CH 184187 A CH184187 A CH 184187A CH 184187D A CH184187D A CH 184187DA CH 184187 A CH184187 A CH 184187A
Authority
CH
Switzerland
Prior art keywords
dye
anthraquinone
preparation
anthraquinone series
methyl ester
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 CH184187A publication Critical patent/CH184187A/en

Links

Description

  

  Verfahren zur Herstellung eines Farbstoffes der     Anthracliinonreihe.       Das Hauptpatent betrifft-     ein    Verfahren  zur Herstellung eines Farbstoffes der     An-          tlirachinonreihe,    bei dem der 1 .     4-Di-p-tolui-          dinoanthrachinon    -     2)    -     carbonsäuremethylester     so lange mit einem sulfonierend wirkenden  Mittel behandelt     wird,    bis eine aufgearbei  tete Probe völlig wasserlöslich geworden ist.  



  Es wurde nun gefunden, dass man einen  ähnlich     wertvollen    Farbstoff der     Anthrachi-          iionreihe    erhalten kann, wenn man den  1 . 4 -     Di    - p -     toluidino    -     anthrachinon-6-carbon-          säuremethylester    so lange mit einem     sulfo-          nierend    wirkenden Mittel behandelt, bis eine  aufgearbeitete Probe völlig wasserlöslich ge  worden ist. .  



  Der erhaltene Farbstoff färbt Wolle aus  schwach saurem Bade in klaren grünen Tö  nen von ausgezeichneten Echtheitseigen  schaften.  



  <I>Beispiel:</I>  10 Teile     1.4-Di-p-toluidino-anthrachinon-          6-carbonsäuremethylester    (hergestellt zumBei-    spiel durch Erhitzen des 1.     4-Dichloranthra-          chinon-6-carbonsäuremethylesters    mit     p-To-          luidin    bei Gegenwart von wasserfreiem     Ka-          liumacetat    und wenig Kupferacetat auf etwa  140' C) werden bei     etwa    5 bis 10   C in  100 Teilen rauchender Schwefelsäure, ent  haltend 5 % S03, gelöst, worauf so lange  rauchende Schwefelsäure, enthaltend     23/'0          S03,    zugegeben wird,

   bis eine aufgearbeitete  Probe in kaltem Wasser eben völlig     löslich     geworden ist. Man giesst darnach unter Rüh  ren in 1000 Teile Eiswasser, trennt den ent  standenen Niederschlag ab, löst diesen in  etwa 200 Teilen heissem Wasser und salzt  den Farbstoff mit Kochsalz aus.



  Process for the preparation of a dye of the anthracliinone series. The main patent relates to a process for the production of a dye of the anti-quinone series, in which the 1. 4-di-p-toluidinoanthraquinone - 2) - carboxylic acid methyl ester is treated with a sulfonating agent until a processed sample has become completely water-soluble.



  It has now been found that a similarly valuable dye of the anthraquinone series can be obtained if the 1. 4 - Di - p - toluidino - anthraquinone-6-carboxylic acid methyl ester treated with a sulfonating agent until a prepared sample has become completely water-soluble. .



  The dye obtained dyes wool from a weakly acidic bath in clear green tones with excellent fastness properties.



  <I> Example: </I> 10 parts of 1,4-di-p-toluidino-anthraquinone-6-carboxylic acid methyl ester (prepared for example by heating the 1,4-dichloroanthraquinone-6-carboxylic acid methyl ester with p-toluidine The presence of anhydrous potassium acetate and a little copper acetate at about 140 ° C. are dissolved in 100 parts of fuming sulfuric acid containing 5% SO3 at about 5 to 10 ° C., whereupon fuming sulfuric acid containing 23/0 SO3 is added becomes,

   until a processed sample has just become completely soluble in cold water. It is then poured into 1000 parts of ice water with stirring, the precipitate formed is separated off, dissolved in about 200 parts of hot water and the dye is salted out with sodium chloride.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Farb stoffes der Anthrachinonreihe, dadurch ge kennzeichnet, dass man den 1. 4-Di-p-toluidino- anthrachinon - 6 - carbonsäuremethylester so lane mit einem sulfonierend wirkenden Mit- j# tel behandelt, bis eine aufgearbeitete Probe völlig wasserlöslich geworden ist. Der erhaltene Farbstoff färbt Wolle aus schwach saurem Bade in klaren grünen Tö- nen von ausgezeichneten Echtheitseigen- schaften. PATENT CLAIM: Process for the production of a dye of the anthraquinone series, characterized in that the 1st 4-di-p-toluidino-anthraquinone-6-carboxylic acid methyl ester is treated with a sulfonating agent until a completely processed sample has become water soluble. The dye obtained dyes wool from a weakly acidic bath in clear green tones with excellent fastness properties.
CH184187D 1934-12-20 1935-01-16 Process for the preparation of a dye of the anthraquinone series. CH184187A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE184187X 1934-12-20
CH180697T 1935-01-16

Publications (1)

Publication Number Publication Date
CH184187A true CH184187A (en) 1936-05-15

Family

ID=25720456

Family Applications (1)

Application Number Title Priority Date Filing Date
CH184187D CH184187A (en) 1934-12-20 1935-01-16 Process for the preparation of a dye of the anthraquinone series.

Country Status (1)

Country Link
CH (1) CH184187A (en)

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