CH141782A - Process for the production of a vat dye of the anthraquinone series. - Google Patents

Process for the production of a vat dye of the anthraquinone series.

Info

Publication number
CH141782A
CH141782A CH141782DA CH141782A CH 141782 A CH141782 A CH 141782A CH 141782D A CH141782D A CH 141782DA CH 141782 A CH141782 A CH 141782A
Authority
CH
Switzerland
Prior art keywords
production
anthraquinone series
vat dye
dye
vat
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 CH141782A publication Critical patent/CH141782A/en

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

Description

  

  Verfahren zur Herstellung eines     Kripenfarbstoi%s    der     Anthrachinonreihe.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung eines     Küpenfarb-.          stoffes    der     Anthrachinonreihe,    dadurch ge  kennzeichnet, dass man     N-Methyl-pyrazol-          anthron-2-sulfosäure    mit reduzierenden Mitteln  behandelt und die erhaltene     Leukoverbindung     oxydiert.  



  Der so gewonnene Farbstoff ist identisch  mit dem im Hauptpatent beschriebenen Körper  <I>Beispiel:</I>       1VIethyl-pyrazolanthrori    vom Schmelzpunkt  <B>223'</B> wird     sulfiert    zum Beispiel mit 7 Teilen  20     %igem        Oleums    bei etwa     140-150'.    Die       Sulfierung    wird in     der,,fiblichen    Weise auf  gearbeitet und das erhaltene orangegelbe       Methyl-pyrazolanthrorr-sulfosaure    Natrium in  Wasser gelöst. Man macht die Lösung mit  Natronlauge alkalisch, gibt     Hydrosulfit    hinzu    und erwärmt.

   Es entsteht unter Abspaltung  des in     2-Stellung    befindlichen     Substituenten     eine blaue     Küpe,    welche mit Luft den roten       Farbstoff    unlöslich und frei von     Sulfogruppen     ausfallen lässt.



  Process for the production of a Kripen dye of the anthraquinone series. The present patent relates to a method of making a vat color. substance of the anthraquinone series, characterized in that N-methyl-pyrazole-anthrone-2-sulfonic acid is treated with reducing agents and the leuco compound obtained is oxidized.



  The dye obtained in this way is identical to the body described in the main patent <I> Example: </I> 1VIethyl-pyrazolanthrori with a melting point <B> 223 '</B> is sulfated, for example with 7 parts of 20% oleum at about 140- 150 '. The sulphonation is carried out in the usual way and the orange-yellow methyl-pyrazolanthror-sulphonic acid sodium obtained is dissolved in water. The solution is made alkaline with sodium hydroxide solution, hydrosulfite is added and the mixture is heated.

   With elimination of the substituent in the 2-position, a blue vat is formed which, with air, makes the red dye insoluble and free of sulfo groups.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Küpen- farbstoffes der Anthrachinonreihe, dadurch gekennzeichnet, dass man N-Methylpyrazol- anthron-2-sulfosäure mit reduzierenden Mit teln behandelt und die erhaltene Leukover- bindung oxydiert. Der so gewonnene Farbstoff ist identisch mit dem im Hauptpatent beschriebenen Körper. PATENT CLAIM: Process for the production of a vat dye of the anthraquinone series, characterized in that N-methylpyrazole-anthrone-2-sulfonic acid is treated with reducing agents and the leuco compound obtained is oxidized. The dye obtained in this way is identical to the body described in the main patent.
CH141782D 1927-09-10 1928-09-05 Process for the production of a vat dye of the anthraquinone series. CH141782A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE141782X 1927-09-10
CH139811T 1928-09-05

Publications (1)

Publication Number Publication Date
CH141782A true CH141782A (en) 1930-08-15

Family

ID=25713408

Family Applications (1)

Application Number Title Priority Date Filing Date
CH141782D CH141782A (en) 1927-09-10 1928-09-05 Process for the production of a vat dye of the anthraquinone series.

Country Status (1)

Country Link
CH (1) CH141782A (en)

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