CH111284A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH111284A
CH111284A CH111284DA CH111284A CH 111284 A CH111284 A CH 111284A CH 111284D A CH111284D A CH 111284DA CH 111284 A CH111284 A CH 111284A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat dye
vat
blue
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 CH111284A publication Critical patent/CH111284A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffes.       Es wurde gefunden,     d.ass    man einen neuen       Küpenfarbstoff    erhält, wenn man     Brom-2.        3-          naphthoxythiophen        (Brom-5.        6-benzo-2.3-.cli-          ketodihydro-l-thiona.phthen)    mit reaktions  fähigen     a-Derivaten    des     5.7-Dichlorisatins     nach bekannten Methoden kondensiert. Der  so gewonnene Farbstoff bildet ein blaues Pul  ver, das sich in Monohydrat mit olivgrüner  und in     Nitrobenzol    mit rötlicher Farbe löst.

    Mit     Hydrosulfit    und     NTatronlauge    erhält man  eine gelbbraune     Küpe,    aus welcher Baum  wolle in echten     rotstichigbl.auen    Tönen an  gefärbt wird. Der Farbstoff eignet sich auch  gut zum Baumwolldruck.  



  <I>Beispiel:</I>  <B>2</B>     79        Teile        Brom-2        .3-n.aphthoxythiopllen          --erden    .mit der fünffachen Menge     Xylol    an  gerührt und mit 231 Teilen 5.     7-Dichlorisa-          tinchlorid,        gelöst    in     Xylol,    langsam     vereinigt.     Sofort entwickelt sich Salzsäure und die  Flüssigkeit färbt sich     vialettblau;    durch ge-         lindes    Erwärmen wird die Kondensation be  endet.

   Nach dem Erkalten wird filtriert, mit  Chlorbenzol und dann mit Alkohol     gewa-          sehen    und der getrocknete Farbstoff eventuell  zwecks Reinigung aus konzentrierter Schwe  felsäure umgelöst.



  Process for the preparation of a vat dye. It has been found that a new vat dye is obtained if bromine-2. 3-naphthoxythiophene (bromo-5. 6-benzo-2.3-.cli- ketodihydro-l-thiona.phthen) condensed with reactive α-derivatives of 5.7-dichloroisatin according to known methods. The dye obtained in this way forms a blue powder which dissolves in monohydrate with an olive green color and in nitrobenzene with a reddish color.

    With hydrosulphite and sodium hydroxide solution, you get a yellow-brown vat, from which cotton is dyed in real reddish-blue hues. The dye also works well for cotton printing.



  <I> Example: </I> <B> 2 </B> 79 parts of bromine-2 .3-n.aphthoxythiopllen --erden .stirred with five times the amount of xylene and with 231 parts of 5,7-dichlorosatin chloride , dissolved in xylene, slowly combined. Hydrochloric acid develops immediately and the liquid turns vialet blue; the condensation is ended by gentle heating.

   After cooling, it is filtered, washed with chlorobenzene and then with alcohol and the dried dye is possibly redissolved from concentrated sulfuric acid for the purpose of cleaning.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Küpenfarbstoffes, dadurch gekennzeichnet, dass man Brom-2. 3-naphthoxythiaphen mit reaktionsfähigen a-Derivaten des 5.7-Di- chlorisatins kondensiert. Der so gewonnene Farbstoff bildet ein blaues Pulver, das sich in Monohydrat mit olivgrüner und in NTitro- benzol mit rötlicher Farbe löst. PATENT CLAIM: Process for the preparation of a new vat dye, characterized in that bromine-2. 3-naphthoxythiaphene condensed with reactive α-derivatives of 5.7-dichloroisatin. The dye obtained in this way forms a blue powder, which dissolves in monohydrate with an olive-green color and in Nitrobenzene with a reddish color. Mit Hydro- sulfit und Natronlauge entsteht eine gelb braune Küpe, aus welcher Baumwolle in ech ten rotstichig blauen Tönen angefärbt wird.- With hydrosulphite and caustic soda, a yellow-brown vat is created from which cotton is dyed in real red-tinged blue tones.
CH111284D 1923-10-01 1924-09-25 Process for the preparation of a vat dye. CH111284A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE111284X 1923-10-01
CH110290T 1924-04-01

Publications (1)

Publication Number Publication Date
CH111284A true CH111284A (en) 1925-08-01

Family

ID=25707704

Family Applications (1)

Application Number Title Priority Date Filing Date
CH111284D CH111284A (en) 1923-10-01 1924-09-25 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH111284A (en)

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