CH183894A - Process for the preparation of a dye. - Google Patents

Process for the preparation of a dye.

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Publication number
CH183894A
CH183894A CH183894DA CH183894A CH 183894 A CH183894 A CH 183894A CH 183894D A CH183894D A CH 183894DA CH 183894 A CH183894 A CH 183894A
Authority
CH
Switzerland
Prior art keywords
dye
amino
cyano
anilinoanthraquinone
soluble
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 CH183894A publication Critical patent/CH183894A/en

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Description

  

  Verfahren zur Herstellung eines     Farbstoffes.       Das Hauptpatent betrifft ein Verfahren  zur Herstellung eines     wertvollen    Farb  stoffes, bei dem     1-Amino-2-cyan-4-(p-tolui-          dino)-anthrachinon    so lange mit einem sul  fonierend wirkenden Mittel behandelt wird,  bis .das Reaktionsprodukt eben völlig wasser  löslich geworden ist, worauf .die     Cyangruppe     zur     Carbonamidgruppe    verseift wird.  



  Es wurde     nun    gefunden, dass man einen  ähnlich     wertvollen    Farbstoff erhält, wenn  man     1-Amino-2-cyan-4-anilinoanthrachinon     so lange mit einem     sulfonierend        wirkenden     Mittel behandelt, bis das Reaktionsprodukt  eben völlig wasserlöslich geworden ist, so  dann die     Cyangruppe    zur     Carbonamidgruppe     verseift.  



  Der erhaltene Farbstoff, eine     Sulfonsäure     des     1-Amino-4-anilinoanthrachinon-2-carbon-          amides,    färbt Wolle aus saurem Bade in  klaren rotstickig blauen Tönen.    <I>Beispiel:</I>  10 Teile 1-     Amino-2-cyan-4-anilinoanthra-          cliiDon,    erhältlich zum     Beispiel    aus     1-Amino-          2-cyan-4-bromanthrachinon    und Anilin, wer  den in 100 Teilen     Schwefelsäuremonohydrat     gelöst und so lange mit rauchender Schwefel  säure, enthaltend 23 %     S03,    versetzt,

   bis eine  entnommene und     aufgearbeitete    Probe erken  nen lässt,     dass    das     Reaktionsprodukt    eben  völlig wasserlöslich geworden ist. Man gibt  sodann zu dem Reaktionsgemisch so viel kri  stallisierte Borsäure, -dass das     Sulfierungs-          gemisch    etwa 5 % davon enthält, und rührt  so lange bei     Zimmertemperatur,    bis die     Cyan-          gruppe    vollständig in die     Carbonamidgruppe     übergeführt worden ist.

   Darauf giesst man  das     Reaktionsgemisch    in     Eiswasser    und salzt  den entstandenen Farbstoff in der üblichen  Weise aus.



  Process for the preparation of a dye. The main patent relates to a process for the production of a valuable dye, in which 1-amino-2-cyano-4- (p-toluidino) anthraquinone is treated with a sulphonating agent until the reaction product is completely has become water-soluble, whereupon the cyano group is saponified to form the carbonamide group.



  It has now been found that a similarly valuable dye is obtained if 1-amino-2-cyano-4-anilinoanthraquinone is treated with a sulfonating agent until the reaction product has just become completely water-soluble, then the cyano group becomes the carbonamide group saponified.



  The dye obtained, a sulfonic acid of 1-amino-4-anilinoanthraquinone-2-carbonamide, dyes wool from an acid bath in clear, red-embroidered blue shades. <I> Example: </I> 10 parts of 1-amino-2-cyano-4-anilinoanthraclydone, obtainable for example from 1-amino-2-cyano-4-bromoanthraquinone and aniline, are dissolved in 100 parts of sulfuric acid monohydrate and so long with fuming sulfuric acid, containing 23% SO3, added,

   until a sample taken and processed shows that the reaction product has just become completely water-soluble. Sufficient crystallized boric acid is then added to the reaction mixture so that the sulfonation mixture contains about 5% of it, and the mixture is stirred at room temperature until the cyano group has been completely converted into the carbonamide group.

   The reaction mixture is then poured into ice water and the dye formed is salted out in the usual way.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Farb- si.offes, dadurch gekennzeichnet, dass man 1- Amino-2-cyan-4-anilinoanthrachinon so lange mit einem sulfonierend wirkenden Mittel be handelt, bis das Reaktionsprodukt eben völlig wasserlöslich geworden ist, und sodann die Cyangruppe zur Carbonamidgruppe verseift. PATENT CLAIM: Process for the production of a dye si.offes, characterized in that 1-amino-2-cyano-4-anilinoanthraquinone is treated with a sulfonating agent until the reaction product has just become completely water-soluble, and then the Cyano group saponified to carbonamide group. Der erhaltene Farbstoff, eine Sulfonsäure des 1-Amino-4-anilinoanthrachinon-2-carbon- 'amides, färbt Wolle aus saurem Bade in klaren rotstichig blauen Tönen. The dye obtained, a sulfonic acid of 1-amino-4-anilinoanthraquinone-2-carbon- 'amide, dyes wool from an acid bath in clear reddish blue tones.
CH183894D 1933-01-21 1933-12-20 Process for the preparation of a dye. CH183894A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE183894X 1933-01-21
CH178227T 1933-12-20

Publications (1)

Publication Number Publication Date
CH183894A true CH183894A (en) 1936-04-30

Family

ID=25720101

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183894D CH183894A (en) 1933-01-21 1933-12-20 Process for the preparation of a dye.

Country Status (1)

Country Link
CH (1) CH183894A (en)

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