CH145156A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH145156A
CH145156A CH145156DA CH145156A CH 145156 A CH145156 A CH 145156A CH 145156D A CH145156D A CH 145156DA CH 145156 A CH145156 A CH 145156A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat dye
bis
sulfuric acid
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 CH145156A publication Critical patent/CH145156A/en

Links

Description

  

  Verfahren zur Darstellung eines     ltüpenfarbstoffes.            Iin    Schweiz. Hauptpatent Nr. 141883 ist  ein Verfahren zur Darstellung eines wert  vollen     Küpenfarbstoffes    beschrieben; bei dem       2.6-Bis-phenylchlormethyliminoanthrachinon     mit schwefelnden Mitteln behandelt wird.  



  Es wurde nun gefunden, dass man diesen       Küpenfarbstoff    auch dadurch erhalten kann,  dass man     2.6-Bis-phenylmerkaptomethylimino-          anthrachinon,    das zum Beispiel gemäss dem  Schweiz. Patent Nr. 142442 dargestellt wer  den kann, mit wasserstoffentziehenden Mitteln  behandelt.  



  Der erhaltene Farbstoff ist das     C-Diphe-          riyl-2.1.6.5-anthrachinondithiazol.     <I>Beispiel:</I>  20 Teile des gemäss dem Verfahren des  Schweiz. Patentes Nr. 142442 erhältlichen 2.6  Bis-phenylmerkaptomethyliininoantbrachinons  werden in 400 Teilen Schwefelsäure von 96 0/0  gelöst, worauf man die Lösung solange auf  etwa<B>1100</B> C ei-wärmt, bis die Farbstoffbil-         dung    beendet ist. Nach dem Erkalten wird  die Reaktionsmasse mit Wasser verdünnt und  das ausgeschiedene     C-Diphenyl-2.1.6.5-anthra-          chinondithiazol    in der üblichen Weise aufge  arbeitet.

      Verwendet man an Stelle der     Schwefel-          säure        von        96        %        Chlorsulfonsäure        oder        Schwe-          felsäuremonohydrat    oder ein Gemisch dieser       Säuren,    so erfolgt die     Farbstoffbildung    schon  bei niedrigeren Temperaturen.  



  Man kann bei der oben beschriebenen  Herstellung des     Dithiazols    aus dem     2.6-Bis-          phenylmerkaptomethyliininoanthrachinon    der  Schwefelsäure auch weitere     Oxydationsmittel,     zum Beispiel Braunstein, zusetzen.  



  Die Überführung des     2.6-Bis-pheriylmer-          kaptomethyliminoanthrachinons    in     C-Diphe-          nyl-2.1.6.5-arithi#achinoriditliiazol    gelingt auch  im alkalischen Medium, zum Beispiel durch  Kochen mit     ätzalkalischer        Ferricyankaliuni-          lösung.  



  Process for the preparation of a turquoise dye. In Switzerland. Main patent no. 141883 describes a process for the preparation of a valuable vat dye; in which 2,6-bis-phenylchloromethyliminoanthraquinone is treated with sulphurizing agents.



  It has now been found that this vat dye can also be obtained by adding 2,6-bis-phenylmercaptomethylimino-anthraquinone, for example according to Switzerland. Patent No. 142442 shown who can be treated with dehydrating agents.



  The dye obtained is C-dipheriyl-2.1.6.5-anthraquinonediazole. <I> Example: </I> 20 parts of the according to the Swiss procedure. Patent No. 142442 available 2.6 bis-phenylmercaptomethyliininoantbrachinons are dissolved in 400 parts of sulfuric acid of 96 0/0, whereupon the solution is heated to about 1100 C until the dye formation is complete. After cooling, the reaction mass is diluted with water and the precipitated C-diphenyl-2.1.6.5-anthraquinone dithiazole is worked up in the usual way.

      If, instead of the sulfuric acid, 96% chlorosulfonic acid or sulfuric acid monohydrate or a mixture of these acids is used, the dye is formed at lower temperatures.



  In the above-described preparation of the dithiazole from the 2,6-bisphenylmercaptomethyliininoanthraquinone of sulfuric acid, other oxidizing agents, for example manganese dioxide, can also be added.



  The conversion of the 2,6-bis-pheriylmerkaptomethyliminoanthraquinone into C-diphenyl-2.1.6.5-arithi # achinoriditliiazole succeeds also in an alkaline medium, for example by boiling with caustic ferricyankaliuni- solution.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Kitpen- farbstoffes, dadurch gekennzeichnet, dass man 2.6-Bis-pheny lmerkaptomethyliminoanthrachi- non mit wasserstoffentziehenden Mitteln be handelt. Der erhaltene Farbstoff ist das C-Diphe- riyl-2.1.6.5-anthrachinondithiazol. PATENT CLAIM: A process for the preparation of a kitpen dye, characterized in that 2,6-bis-phenyl mercaptomethyliminoanthraquinone is treated with dehydrogenating agents. The dye obtained is C-dipheriyl-2.1.6.5-anthraquinonediazole.
CH145156D 1928-05-10 1929-04-23 Process for the preparation of a vat dye. CH145156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE145156X 1928-05-10

Publications (1)

Publication Number Publication Date
CH145156A true CH145156A (en) 1931-02-15

Family

ID=5670616

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145156D CH145156A (en) 1928-05-10 1929-04-23 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH145156A (en)

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