CH100192A - Process for the preparation of a vat dye of the indirubin series. - Google Patents

Process for the preparation of a vat dye of the indirubin series.

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Publication number
CH100192A
CH100192A CH100192DA CH100192A CH 100192 A CH100192 A CH 100192A CH 100192D A CH100192D A CH 100192DA CH 100192 A CH100192 A CH 100192A
Authority
CH
Switzerland
Prior art keywords
indirubin
preparation
series
vat dye
violet
Prior art date
Application number
Other languages
German (de)
Inventor
Farbenfabriken Vorm Friedr Co
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Publication of CH100192A publication Critical patent/CH100192A/en

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Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffs    der     Indirubinreihe.       Es wurde gefunden,     dass    man zu einem  neuen klaren,     gelbstichig    braunen     Kripen-          e#          farbstoff    dadurch gelangt,     dass    das in den       .Annalen    der Chemie<B>388, 1912,</B> Seite<B>10</B>     be-          sehriebene    2<B>-</B>     1-Ntphtooxythiopho-n    mit<B>5 -</B>     7-          Diehlorisatin    kondensiert wird.

      <I>Beispiel:</I>       '200        C        xceivi(#lit-steile    2<B>-</B>     1-Naphtooxythiophen     und 220     Gewiehtsteile   <B>5 - 7 -</B>     Diehlorisatin     werden in Eisessig gelöst, mit etwas konzen  trierter Salzsäure versetzt und eine Stunde  lang im Wasserbad erhitzt; der Farbstoff  wird abgesaugt und isoliert. Ausbeute<B>90</B>     '/o     der     The        orie.     



  Er bildet ein braunes, kristallinisches Pul  ver, das sich in organischen Lösungsmitteln  nur sehr schwer, in konzentrierter Schwefel  saure wenig mit rotvioletter, in Monohydrat  leicht mit     blauvioleiter    Farbe löst. Mit       Hydrosulfit    und     Nafronlauge    entsteht eine    gelbe     Küpe,    aus welcher die Textilfaser in  klaren,     gelbstieliig    braunen Tönen von aus  gezeichneter Echtheit angefärbt wird.



  Process for the preparation of a vat dye of the indirubin series. It has been found that a new clear, yellowish-tinged brown Kripen- e # dye can be obtained by loading it in the .Annalen der Chemie <B> 388, 1912, </B> page <B> 10 </B> very even 2 <B> - </B> 1-Ntphtooxythiopho-n with <B> 5 - </B> 7- diehlorisatin is condensed.

      <I> Example: </I> '200 C xceivi (# lit-steile 2 <B> - </B> 1-naphtooxythiophene and 220 parts by weight <B> 5 - 7 - </B> Diehlorisatin are dissolved in glacial acetic acid, a little concentrated hydrochloric acid is added and the mixture is heated in a water bath for one hour; the dye is filtered off with suction and isolated. Yield <B> 90 </B> '/ o of theory.



  It forms a brown, crystalline powder that is very difficult to dissolve in organic solvents; in concentrated acidic sulfur it dissolves slightly with red-violet color, in monohydrate easily with blue-violet color. With hydrosulphite and sodium hydroxide solution, a yellow vat is created, from which the textile fiber is dyed in clear, yellowish brown tones with excellent authenticity.

Claims (1)

PATENTANSPRUGII: Verfahren zur Darstellung eines neuen Hüpenfarbstoffes der Indirubinreilie, darin bestehend, dass man das<B>92 -</B> 1-kaphtooxytliio- phen mit<B>5 -</B> 7-Dichlorisatin kondensiert. Er bildet ein braunes, kristallinisehes Pul ver, das sich in organischen Lösungsmitteln nur sehr schwer, in konzentrierter Sehwefel- säure wenig mit rotvioleiter, in Alonohydrat leicht mit blauvioletter Farbe löst. PATENT APPLICATION II: Process for the preparation of a new Hüpen dye of the indirubin line, consisting in that the <B> 92 - </B> 1-kaphtooxytliiophene is condensed with <B> 5 - </B> 7-dichloroisatin. It forms a brown, crystalline powder which is very difficult to dissolve in organic solvents, slightly red-violet in concentrated sehulphuric acid, and slightly blue-violet in alonohydrate. Mit Hy- drosulfit und Natronlauge entsteht eine gelbe Küpe, aus welcher die Textilfaser in klaren, gelbstichig braunen Tönen von ausgezeich neter Echtheit angefärbt wird. With hydrosulphite and caustic soda, a yellow vat is created, from which the textile fiber is dyed in clear, yellowish brown tones with excellent fastness.
CH100192D 1921-03-26 1922-03-18 Process for the preparation of a vat dye of the indirubin series. CH100192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE100192X 1921-03-26

Publications (1)

Publication Number Publication Date
CH100192A true CH100192A (en) 1923-07-16

Family

ID=5648446

Family Applications (1)

Application Number Title Priority Date Filing Date
CH100192D CH100192A (en) 1921-03-26 1922-03-18 Process for the preparation of a vat dye of the indirubin series.

Country Status (1)

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CH (1) CH100192A (en)

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