CH135137A - 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
CH135137A
CH135137A CH135137DA CH135137A CH 135137 A CH135137 A CH 135137A CH 135137D A CH135137D A CH 135137DA CH 135137 A CH135137 A CH 135137A
Authority
CH
Switzerland
Prior art keywords
thionaphthene
preparation
series
indolindigo
vat 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 CH135137A publication Critical patent/CH135137A/en

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Description

  

  Verfahren zur Darstellung eines violetten     Nüpenfarbstoffes    der     2-Thionaphten-          2'-ind        olindigor        eihe.            Cregenstand    der     vorliegendenErfindung;ist     ein     Verfahren    zur Darstellung eines violetten       Küpenfarbstoffes    der     2-Thionaphten-2'-indol-          indigoreihe    der Formel:

    
EMI0001.0012     
    den man durch Kondensation von     4-i4lethyl-          5.7-diclilor-3-oxy-l-thionaphten    mit einer  reaktionsfähigen     4,5-Dichlor-7-methylisatin-          a-verbindung    erhält. Trocken ist der Farb  stoff ein violett gefärbtes Pulver, das in       konzentrierter    Schwefelsäure blaugrün lös  lich ist. Mit Natronlauge und     Hydrosulfit     gibt er eine gelbe     Küpe,    aus der die Faser  echt violett angefärbt wird.

      <I>Beispiel:</I>    2<B>3</B> Gewichtsteile     4,5-Dichlor-7-methylisatin     werden in etwa 200     Gewichtsteilen    Chlor  benzol suspendiert und nach     Zusatz    von  22 Gewichtsteilen     Phosphorpentachlorid    er  hitzt. Die entstandene     Lösung    des     4,5-Dichlor-          7-methylisatin-a-chl.orids    wird in eine Lö  sung von 23,3 Gewichtsteilen     4-Methyl-5,7-          dichlor-3-o,xy-l-thionaphten    in 200 Gewichts  teilen Chlorbenzol     einlaufen    gelassen, wo  bei sich der Farbstoff sofort abscheidet.

    Nach kurzem     Erwärmen    auf 80 bis 90    wird der Farbstoff filtriert, mit Alkohol  gewaschen und getrocknet.



  Process for the preparation of a purple nub dye of the 2-thionaphtene-2'-ind olindigo series. Cregenstand of the present invention; is a process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indole indigo series of the formula:

    
EMI0001.0012
    which is obtained by condensation of 4-i4lethyl-5.7-diclilor-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 bluish-green in concentrated sulfuric acid. With caustic soda and hydrosulphite, he gives a yellow vat from which the fibers are dyed really purple.

      <I> Example: </I> 2 <B> 3 </B> parts by weight of 4,5-dichloro-7-methylisatin are suspended in about 200 parts by weight of chlorobenzene and, after adding 22 parts by weight of phosphorus pentachloride, it is heated. The resulting solution of 4,5-dichloro-7-methylisatin-a-chloride is dissolved in a solution of 23.3 parts by weight of 4-methyl-5,7-dichloro-3-o, xy-l-thionaphthene in 200 Share the weight of chlorobenzene, where the dye separates out immediately.

    After brief warming to 80 to 90, the dye is filtered, washed with alcohol and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Küpenfarbstoffes der 2-Thionaphten-2'-indol- indigOreihe der Formel: EMI0002.0001 dadurch gekennzeichnet, da.ss man 4-Methyl- 5, 7-dichlor- < 3-oxy-l-thionaphten mit einer reaktionsfähigen 4,5-Dieh.lor-7-methjisatin- a-verbindung kondensiert. PATENT CLAIM: Process for the preparation of a new vat dye of the 2-thionaphthene-2'-indole-indigo series of the formula: EMI0002.0001 characterized in that 4-methyl-5, 7-dichloro <3-oxy-1-thionaphthene is condensed with a reactive 4,5-dieh.lor-7-methjisatin-a compound. 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 Iiüpe, aus der die Faser ee-ht violett angefärbt wird. When dry, the dye is a violet powder that is soluble in concentrated sulfuric acid with a blue-green color; with caustic soda and hydrosulphite it forms a yellow lip, from which the fibers are stained violet.
CH135137D 1927-01-03 1927-12-30 Process for the preparation of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. CH135137A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE135137X 1927-01-03
CH132316T 1927-12-30

Publications (1)

Publication Number Publication Date
CH135137A true CH135137A (en) 1929-08-31

Family

ID=25711845

Family Applications (1)

Application Number Title Priority Date Filing Date
CH135137D CH135137A (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) CH135137A (en)

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