CH135123A - Process for the production of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. - Google Patents

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

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Publication number
CH135123A
CH135123A CH135123DA CH135123A CH 135123 A CH135123 A CH 135123A CH 135123D A CH135123D A CH 135123DA CH 135123 A CH135123 A CH 135123A
Authority
CH
Switzerland
Prior art keywords
thionaphthene
series
indolindigo
blue
violet
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 CH135123A publication Critical patent/CH135123A/en

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Description

  

  Verfahren zur Herstellung eines violetten     Küpenfarbstoffes    der       2-Thionaphten-2'-indolindigor        eihe.            Gegenstand    der vorliegenden Erfindung  ist ein Verfahren zur Darstellung eines vio  letten     Küpenfarbstoffes    der     2-Thionaphten-2'-          indolindigoreihe    der Formel  
EMI0001.0008     
    durch Kondensation von     5-Chlor-7-methyl-3-          oxy-l-thionaphten    mit einer reaktionsfähigen       5-Brom-7-methylisatin-a-verbindung.    Trocken  ist der Farbstoff ein blauviolett gefärbtes  Pulver, das in konzentrierter Schwefelsäure  blaugrün löslich ist.

   Mit Natronlauge und       Hydrosulfit    gibt er eine gelbe     güpe,    aus  der die Faser echt blauviolett angefärbt  wird.  



       Beispiel:     24 Gewichtsteile     5-Brom-7-methylisatin     werden in etwa 200 Gewichtsteilen Chlor-         benzol    suspendiert und nach Zusatz von 22  Gewichtsteilen     Phosphorpentachlorid    erhitzt.  Die entstandene Lösung des     5-Brom-7-me-          thylisatin-a-chlorids    wird in eine Lösung  von 20 Gewichtsteilen     5-Chlor-7-methyl-3-          oxy-l-thionaphten    in 200 Gewichtsteilen  Chlorbenzol einlaufen gelassen, wobei sich  der     Farbstoff    sofort abscheidet. Nach kurzem  Erwärmen auf 80-90  C 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
EMI0001.0008
    by condensation of 5-chloro-7-methyl-3-oxy-l-thionaphthene with a reactive 5-bromo-7-methylisatin-a-compound. When dry, the dye is a blue-violet colored powder that is soluble in a blue-green color in concentrated sulfuric acid.

   With caustic soda and hydrosulphite, it gives a yellow güpe, from which the fiber is colored really blue-violet.



       Example: 24 parts by weight of 5-bromo-7-methylisatin are suspended in about 200 parts by weight of chlorobenzene and, after the addition of 22 parts by weight of phosphorus pentachloride, heated. The resulting solution of 5-bromo-7-methylisatin-a-chloride is allowed to run into a solution of 20 parts by weight of 5-chloro-7-methyl-3-oxy-1-thionaphthene in 200 parts by weight of chlorobenzene, whereby the dye becomes separates immediately. After brief heating to 80-90 C, the dye is filtered, washed with alcohol and dried.

Claims (1)

PATENTANTSPRÜCH Verfahren zur Darstellung eines neuen Küpenfarbstoffes der 2-Thionaphten-2'-indol- indigoreihe der Formel EMI0001.0027 dadurch gekennzeichnet, dass man 5-Chlor-7- methyl-S-oay-l-thionaphten mit einer reak tionsfähigen 5-Brom-7-methylisatin-a-verbin- dung kondensiert. PATENT APPROVAL Process for the preparation of a new vat dye of the 2-thionaphthene-2'-indole indigo series of the formula EMI0001.0027 characterized in that 5-chloro-7-methyl-S-oay-l-thionaphthene is condensed with a reactive 5-bromo-7-methylisatin-a compound. Trocken ist der Farbstoff ein blauviolettes Pulver, das in konzentrier ter Schwefelsäure mit blaugrüner Farbe lös- lieh ist; mit Natronlauge und Hydr-osulfit bildet er eine gelbe Küpe, aus der die Faser echt blauviolett angefärbt ist. When dry, the dye is a blue-violet 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 stained really blue-violet.
CH135123D 1927-11-05 1927-12-30 Process for the production of a violet vat dye of the 2-thionaphthene-2'-indolindigo series. CH135123A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE135123X 1927-11-05
CH132316T 1927-12-30

Publications (1)

Publication Number Publication Date
CH135123A true CH135123A (en) 1929-08-31

Family

ID=25711831

Family Applications (1)

Application Number Title Priority Date Filing Date
CH135123D CH135123A (en) 1927-11-05 1927-12-30 Process for the production of a violet vat dye of the 2-thionaphthene-2'-indolindigo series.

Country Status (1)

Country Link
CH (1) CH135123A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294888B (en) * 1961-10-25 1969-05-08 Ewemaskiner Ab Method and device for drying wood

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294888B (en) * 1961-10-25 1969-05-08 Ewemaskiner Ab Method and device for drying wood

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