CH108863A - Process for the preparation of a sulfur-containing vat dye. - Google Patents

Process for the preparation of a sulfur-containing vat dye.

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Publication number
CH108863A
CH108863A CH108863DA CH108863A CH 108863 A CH108863 A CH 108863A CH 108863D A CH108863D A CH 108863DA CH 108863 A CH108863 A CH 108863A
Authority
CH
Switzerland
Prior art keywords
sulfur
preparation
benzothionaphthene
anilene
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Vorm Meiste Bruening
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH108863A publication Critical patent/CH108863A/en

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Description

       

  Verfahren zur Darstellung eines schwefelhaltigen     Nüpenfarbstoffes.     
EMI0001.0002     
    der nachträglichen Behandlung mit Brom  unterwirft. Hierdurch wird nicht nur eine  überraschende     Verschiebung-    der Nuance be  wirkt, sondern auch die Echtheit der neuen       Farbstoffe    bedeutend gehoben. Der neue Farb  stoff stellt ein     violettes    Pulver dar und ist  unlöslich in verdünnten Säuren und Alkalien,  löslich in konzentrierter Schwefelsäure.  



  <I>Beispiel:</I>  10 Teile des Kondensationsproduktes aus  2 - 3-Diketodihydrothionaphten-2-(p-dimethyl-         amino)anil    und     3-Oxy-5        #        6-benzothionaphten     werden unter Rühren in 100 Teile     Nitrobenzol     eingetragen und bei gewöhnlicher Temperatur  mit 10 Teilen Brom versetzt. Alsdann heizt  man langsam auf     150-1601    und erhitzt so  lange, bis kein Bromwasserstoff mehr ent  weicht und nahezu alles Brom verschwunden  ist. Die ursprüngliche, grauschwarze Farbe  des Ausgangsmaterials geht dabei in violett  über. Nach dem Erkalten verdünnt man mit  wenig Alkohol, saugt ab und wäscht mit  Alkohol nach.

   Man erhält ein dunkelviolettes  Pulver, das mit alkalischem     Hydrosulfit    eine  klare, orange     Küpe    liefert, aus welcher Wolle  und Baumwolle in lebhaft violetten Tönen  von hervorragender Echtheit angefärbt wird.    Es wurde gefunden, dass man einen neuen       Küpenfarbstoff    von hervorragender Echtheit  erhält,

   wenn man das Kondensationsprodukt  aus     3-Oxy-5        #        6-benzothionaphten    mit 2-     Anilen     des 2 -     3-Diketodihydrothionaphtens        bezw.    aus       Oxythionaphten    mit     2-Anilen    des 2 -     3-Diketo-          dihydro    - 5     #    6 -     benzothionaphtens    von der  Formel



  Process for the preparation of a sulfur-containing pomace dye.
EMI0001.0002
    the subsequent treatment with bromine. This not only causes a surprising shift in the shade, but also significantly increases the authenticity of the new dyes. The new dye is a purple powder and is insoluble in dilute acids and alkalis, and soluble in concentrated sulfuric acid.



  <I> Example: </I> 10 parts of the condensation product of 2-3-diketodihydrothionaphten-2- (p-dimethylamino) anil and 3-oxy-5 # 6-benzothionaphthene are added to 100 parts of nitrobenzene with stirring and added to Ordinary temperature mixed with 10 parts of bromine. Then heat slowly to 150-1601 and heat until no more hydrogen bromide escapes and almost all the bromine has disappeared. The original, gray-black color of the starting material changes to purple. After cooling, it is diluted with a little alcohol, vacuumed and washed with alcohol.

   A dark violet powder is obtained which, with alkaline hydrosulfite, gives a clear, orange vat from which wool and cotton are dyed in vivid violet shades of excellent fastness. It has been found that a new vat dye of excellent fastness is obtained,

   if the condensation product of 3-oxy-5 # 6-benzothionaphthene with 2- anilene of 2-3-diketodihydrothionaphthene or. from oxythionaphthene with 2-anilene of 2 - 3-diketodihydro - 5 # 6 - benzothionaphthene of the formula


    

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines schwefel haltigen güpenfarbstoffes, darin bestehend, dass man das Kondensationsprodukt aus 3-Oxy-5 - 6-benzothionaphten mit 2-Anilen des 2.3-Diketodihydrothionaphtens bezw. aus Oxythionaphten mit 2-Anilen des 2 - 3-Diketo- dihydro-5 # 6-benzothionaphtens mit Brom be handelt. PATENT CLAIM: Process for the preparation of a sulfur-containing liquid dye, consisting in that the condensation product of 3-oxy-5-6-benzothionaphthene with 2-anilene of 2,3-diketodihydrothionaphthene bezw. from oxythionaphthene with 2-anilene of 2-3-diketodihydro-5 # 6-benzothionaphthene with bromine. Der neue Farbstoff stellt ein vio lettes Pulver dar, unlöslieh in verdünnten Säuren und Alkalien, löslich in konzentrierter Schwefelsäure, das mit alkalischem Hydro- sulfit eine klare, orange Küpe liefert, aus welcher Wolle und Baumwolle in lebhaft violetten Tönen von hervorragender Echtheit angefärbt wird. The new dye is a violet powder, insoluble in dilute acids and alkalis, soluble in concentrated sulfuric acid, which with alkaline hydrosulphite gives a clear, orange vat from which wool and cotton are dyed in vivid violet tones of excellent fastness.
CH108863D 1923-02-09 1924-02-05 Process for the preparation of a sulfur-containing vat dye. CH108863A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE108863X 1923-02-09
CH108493T 1924-02-05

Publications (1)

Publication Number Publication Date
CH108863A true CH108863A (en) 1925-02-16

Family

ID=25707386

Family Applications (1)

Application Number Title Priority Date Filing Date
CH108863D CH108863A (en) 1923-02-09 1924-02-05 Process for the preparation of a sulfur-containing vat dye.

Country Status (1)

Country Link
CH (1) CH108863A (en)

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