CH163773A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH163773A
CH163773A CH163773DA CH163773A CH 163773 A CH163773 A CH 163773A CH 163773D A CH163773D A CH 163773DA CH 163773 A CH163773 A CH 163773A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat
vat dye
blue
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 CH163773A publication Critical patent/CH163773A/en

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Description

  

  verfahren zur Darstellung eines     Itüpenfarbstoffes.       Gegenstand vorliegenden Zusatzpatentes  ist ein Verfahren zur Darstellung eines       Küpenfarbstoffes,    welches dadurch gekenn  zeichnet ist,     da.ss    man 1     Mol        Pyren    mit 2     Mol     eines den     m-Chlorbenzoylrest    abgebenden  Mittels mit Aluminiumchlorid in     Gegenwart     eines dehydrierend wirkenden Mittels kon  densiert.  



  <I>Beispiel:</I>  Eine Lösung von 20 Gewichtsteilen     Py-          ren    in 350 Gewichtsteilen     m-Chlorbenzovl-          chlorid        lässt    man bei etwa<B>130'</B> in 400 Ge  wichtsteilen Aluminiumchlorid - Chlorkali  (1     Mol        AhCle    auf 1     Mol        KCl)    einlaufen.  Dann trägt man unter Rühren in kleinen An  teilen soviel Braunstein ein, bis die Farbe  der Schmelze blau geworden ist, was in 20  bis 30 Minuten erreicht ist.

   Nach einer  Stunde zersetzt man mit     Wasser    und reinigt  das Rohprodukt durch     Umküpen    oder durch  Behandlung mit.     Hypochlorit.    Der erhaltene  Farbstoff löst sich in konzentrierter Schwe-         felsäure        grünstichiger    blau als der nach dem  Verfahren des Hauptpatentes erhaltene. Er  liefert aus     violettblauer        Küpe    orange Fär  bungen auf Baumwolle.



  process for the preparation of an itupy dye. The subject of the present additional patent is a process for the preparation of a vat dye, which is characterized in that 1 mole of pyrene is condensed with 2 moles of an agent releasing the m-chlorobenzoyl radical with aluminum chloride in the presence of a dehydrating agent.



  <I> Example: </I> A solution of 20 parts by weight of pyrene in 350 parts by weight of m-chlorobenzene chloride is dissolved at about <B> 130 '</B> in 400 parts by weight of aluminum chloride - potassium chloride (1 mol AhCle 1 mol of KCl). Then, while stirring, in small amounts to share as much brownstone until the color of the melt has turned blue, which is achieved in 20 to 30 minutes.

   After one hour, it is decomposed with water and the crude product is purified by pumping or by treatment with. Hypochlorite. The dye obtained dissolves in concentrated sulfuric acid more greenish blue than that obtained by the process of the main patent. He supplies orange dyeings on cotton from a violet-blue vat.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes,dadurch gekennzeichnet, dass man 1 Mol Pyren mit 2 bfol eines den m- Chlorbenzoylrest abgebenden Mittels mit Aluminiumchlorid in Gegenwart eines dehy= @drierend wirkenden Mittels kondensiert. PATENT CLAIM: Process for the preparation of a vat dye, characterized in that 1 mol of pyrene is condensed with 2 bfol of an agent releasing the m-chlorobenzoyl radical with aluminum chloride in the presence of a dehydrating agent. Der so erhaltene Farbstoff löst sich in konzentrierter Schwefelsäure grünstichiger blau als der nach dem Verfahren des Haupt patentes erhaltene. Er liefert aus violett blauer Küpe orange Färbungen auf Baum wolle. UNTERANSPRÜCHE: 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Konden- sation in Gegenwart vom Kaliumchlorid durchführt. 2. The dye obtained in this way dissolves in concentrated sulfuric acid more greenish blue than that obtained by the process of the main patent. He supplies orange dyeings on cotton from a violet-blue vat. SUBClaims: 1. Method according to claim, characterized in that the condensation is carried out in the presence of potassium chloride. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet"dass man als dehydrierend wirkendes Mittel Braunstein verwendet, den man in die auf zirka 130 erhitzte Schmelze .der Reaktionskomponenten ein trägt. Process according to patent claim, characterized in that the dehydrating agent used is manganese dioxide, which is introduced into the melt of the reaction components, which is heated to about 130.
CH163773D 1931-04-17 1932-04-11 Process for the preparation of a vat dye. CH163773A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE163773X 1931-04-17
CH160758T 1932-04-11

Publications (1)

Publication Number Publication Date
CH163773A true CH163773A (en) 1933-08-31

Family

ID=25717371

Family Applications (1)

Application Number Title Priority Date Filing Date
CH163773D CH163773A (en) 1931-04-17 1932-04-11 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH163773A (en)

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