CH135143A - Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. - Google Patents

Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series.

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Publication number
CH135143A
CH135143A CH135143DA CH135143A CH 135143 A CH135143 A CH 135143A CH 135143D A CH135143D A CH 135143DA CH 135143 A CH135143 A CH 135143A
Authority
CH
Switzerland
Prior art keywords
thionaphthene
series
preparation
indolindigo
dye
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 CH135143A publication Critical patent/CH135143A/en

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Description

  

  Verfahren zur Darstellung eines violetten     Küpenfarbstoffes    der       2-Thionaphten-2'-indolindigoreihe.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung eines vio  letten     Küpenfarbstoffes    der     2-Thionaphten-2'-          indolindigo-Reihe    der Formel:  
EMI0001.0006     
    den man durch Kondensation von     5-Chlor-          4.7-dimethyl-3-oxy-l-thionaphten    mit einer  reaktionsfähigen     4,5-Dichlor-7-methylisatin-a-          verbindung    erhält.

   Trocken ist der     Farbstoff     ein violett gefärbtes Pulver, das in konzen  trierter Schwefelsäure blaugrün löslich ist.  Mit Natronlauge und     Hydrosulfit    gibt er eine  gelbe     Küpe,    aus der die Faser echt violett  angefärbt wird.    <I>Beispiel</I>  23 Gewichtsteile     4,5-Dichlor-7-rnethylisatin     werden in etwa 200 Gewichtsteilen Chlor  benzol suspendiert und nach Zusatz von 22  Gewichtsteilen     Phosphorpentachlorid    erhitzt.

    Die entstandene Lösung des     4,5-Dichlor-7-          methylisatin-a-chlorids    wird in eine Lösung  von 21,2 Gewichtsteilen     5-Chlor-4,7-dimethyl-          3-oxy-l-tionaphten    in 200 Gewichtsteilen  Chlorbenzol einlaufen gelassen, wobei sich  der Farbstoff sofort abscheidet. Nach kurzem  Erwärmen auf 80-90  wird der Farbstoff  filtriert, mit Alkohol gewaschen und ge  trocknet.



  Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. The present invention relates to a process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series of the formula:
EMI0001.0006
    which is obtained by condensation of 5-chloro-4,7-dimethyl-3-oxy-1-thionaphthene with a reactive 4,5-dichloro-7-methylisatin-a compound.

   When dry, the dye is a violet-colored powder that is soluble in concentrated sulfuric acid in a blue-green color. With caustic soda and hydrosulphite, he gives a yellow vat from which the fibers are dyed really purple. <I> Example </I> 23 parts by weight of 4,5-dichloro-7-methylisatin are suspended in about 200 parts by weight of chlorobenzene and heated after adding 22 parts by weight of phosphorus pentachloride.

    The resulting solution of 4,5-dichloro-7-methylisatin-a-chloride is allowed to run into a solution of 21.2 parts by weight of 5-chloro-4,7-dimethyl-3-oxy-1-ionaphthene in 200 parts by weight of chlorobenzene, the dye separating out immediately. After brief warming to 80-90, the dye is filtered, washed with alcohol and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur .Darstellung eines neuen Küpenfarbstoffes der 2-Thionaphten-2'-indolin- digo-Reihe der Formel: EMI0002.0001 dadurch gekennzeichnet, dass man 5-Chlor- 4,7-dimethyl-3-oxy-l-thionaphten mit einer re aktionsfähigen 4,5-Dichlor-7-methylisatin-a- verbindung kondensiert. Trocken ist der Farbstoff ein violettes Pulver, das in kon zentrierter Schwefelsäure mit blaugrüner Farbe löslich ist; mit Natronlauge und Hydrosulfit bildet er eine gelbe Küpe, aus der die Faser echt violett angefärbt wird. PATENT CLAIM: Process for the preparation of a new vat dye of the 2-thionaphthene-2'-indoline digo series of the formula: EMI0002.0001 characterized in that 5-chloro-4,7-dimethyl-3-oxy-1-thionaphthene is condensed with a reactive 4,5-dichloro-7-methylisatin-a compound. When dry, the dye is a purple powder that is soluble in concentrated sulfuric acid with a blue-green color; with caustic soda and hydrosulphite, it forms a yellow vat from which the fiber is dyed really purple.
CH135143D 1927-01-03 1927-12-30 Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. CH135143A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE135143X 1927-01-03
CH132316T 1927-12-30

Publications (1)

Publication Number Publication Date
CH135143A true CH135143A (en) 1929-08-31

Family

ID=25711851

Family Applications (1)

Application Number Title Priority Date Filing Date
CH135143D CH135143A (en) 1927-01-03 1927-12-30 Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series.

Country Status (1)

Country Link
CH (1) CH135143A (en)

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