CH158131A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH158131A
CH158131A CH158131DA CH158131A CH 158131 A CH158131 A CH 158131A CH 158131D A CH158131D A CH 158131DA CH 158131 A CH158131 A CH 158131A
Authority
CH
Switzerland
Prior art keywords
preparation
vat dye
carried out
reaction
weight
Prior art date
Application number
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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 CH158131A publication Critical patent/CH158131A/en

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Description

  

  Verfahren zur Darstellung eines     Nüpenfarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Darstellung eines     Küpenfarb-          stoffes,    dadurch gekennzeichnet,     dass    man     1.5-          Dichlor-4.8-dibenzoylnaphthalin    mit einem       starkalkalischenKondensationsmittel,vorzugs-          weise        Ätzkali,    behandelt.  



  Zweckmässig arbeitet man in Gegenwart  eines     Verdünnungsmitte1,9    wie     Chinolin    oder  Alkohol.  



  Der so erhältliche Stoff ist das bekannte  <B>3.</B> 4.<B>8. 9 -</B>     Dibenzpyrenchinon   <B>- 5. 10.</B>  



  <I>Beispiel<B>1:</B></I>  <B>10</B>     Gewichtsteile        1.5-Dichlor-4.8-dibenzoyl-          naphthalin    (farblose Nadeln, F. P.<B>277 0,</B> er  hältlich durch Einwirkung von     Benzoylchlo-          rid    und     Aluminiumoblorid    auf     1.5-Dichlor-          naphthalin)    werden mit<B>5</B> Gewichtsteilen     Ätz-          kali    und 40 Gewichtsteilen     Chinolin    während       '/4    Stunde unter Rühren zum Sieden erhitzt.

         Lie    Lösung färbt sich erst gelb, dann vor  übergehend     violettrot,    schliesslich scheidet    sich eine     schwerlösliche,    dunkel gefärbte Ver  bindung ab.  



  Die Aufarbeitung kann     nun    so erfolgen,       dass    abgesaugt und mit     Chinolin        naebgewa-          sehen    wird. Der dunkle Rückstand     verküpt     sich praktisch restlos mit roter Farbe. Beim  Oxydieren der     Küpe    erhält man das     eritspre-          chende        3.4.8.9-Dibenzpyrenebinon-5.10    in gold  gelben Flocken mit guter Ausbeute.  



  <I>Beispiel 2:</I>  <B>33</B>     Gewicbtsteile        1.5-Dieblor-4.8-diben-          zoylnaphthalin    suspendiert man in<B>50</B> Ge  wichtsteilen Alkohol, setzt<B>100</B> Gewichts  teile     Ätzkali    zu und erhitzt die Schmelze  unter Rühren derart,     dass    der überschüssige  Alkohol entweichen kann. Die Schmelze färbt  sich schliesslich rotbraun und der gebildete  Farbstoff klumpt sich bei zirka<B>250 0</B> zusam  men. Man giesst nun das     Ätzkali    ab und  reinigt das erhaltene     Dibenzpyrenchinon    durch       Ausoxydieren    der filtrierten     Küpe.  



  Process for the preparation of a pebble dye. The subject of the present patent is a process for the preparation of a vat dye, characterized in that 1,5-dichloro-4,8-dibenzoylnaphthalene is treated with a strongly alkaline condensation agent, preferably caustic potash.



  It is advisable to work in the presence of a diluent1,9 such as quinoline or alcohol.



  The fabric available in this way is the well-known <B> 3. </B> 4. <B> 8. 9 - <B> Dibenzpyrenquinone <B> - 5. 10. </B>



  <I>Example <B>1:</B> </I> <B> 10 </B> parts by weight of 1.5-dichloro-4.8-dibenzoylnaphthalene (colorless needles, FP <B> 277 0, </B> It can be obtained through the action of benzoyl chloride and aluminum chloride on 1,5-dichloronaphthalene) are heated to boiling with <B> 5 </B> parts by weight of caustic potash and 40 parts by weight of quinoline for 1/4 hour with stirring.

         The solution first turns yellow, then transiently violet-red, and finally a poorly soluble, dark-colored compound separates out.



  The work-up can now be carried out in such a way that it is suctioned off and washed with quinoline. The dark residue is practically completely covered with red paint. When the vat is oxidized, the corresponding 3.4.8.9-dibenzpyrenebinone-5.10 is obtained in gold-yellow flakes with good yield.



  <I> Example 2: </I> <B> 33 </B> parts by weight of 1.5-Dieblor-4.8-dibenzoylnaphthalene are suspended in <B> 50 </B> parts by weight of alcohol, then <B> 100 </ B> Assign caustic potash by weight and heat the melt while stirring in such a way that the excess alcohol can escape. The melt finally turns red-brown in color and the dye formed clumps together at around <B> 250 </B>. The caustic potash is then poured off and the dibenzpyrenquinone obtained is purified by oxidizing the filtered vat.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung eines Küpen- farbstoffes. dadurch gekennzeichnet, dass man 1.5-Dichlor-4.8-dibeiizoylnaphthalin mit einem stark alkalischen Kondensationsmittel be handelt. UNTERANSPRüCHE: <B>1.</B> *Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als stark alka lisches Kondensationsmittel Ätzkali ver wendet. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktion in Gegenwart eines Verdünnungsmittels durch führt. <B> PATENT CLAIM: </B> Process for the preparation of a vat dye. characterized in that 1,5-dichloro-4,8-dibeiizoylnaphthalene is treated with a strongly alkaline condensing agent. SUBClaims: <B> 1. </B> * Method according to claim, characterized in that caustic potash is used as the strongly alkaline condensation agent. 2. The method according to claim, characterized in that the reaction is carried out in the presence of a diluent. <B>3.</B> Verfahren nach Unteranspruch 2, dadurch gekennzeichnet, dass man die Reaktion in Gegenwart von Chinolin durchführt. 4. Verfahren nach Unteranspruch 2, dadurch gekennzeichnet, dass man die Reaktion in Gegenwart von Alkohol durchführt. <B> 3. </B> Process according to dependent claim 2, characterized in that the reaction is carried out in the presence of quinoline. 4. The method according to dependent claim 2, characterized in that the reaction is carried out in the presence of alcohol.
CH158131D 1930-05-19 1931-05-18 Process for the preparation of a vat dye. CH158131A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE158131X 1930-05-19
CH154511T 1931-05-18

Publications (1)

Publication Number Publication Date
CH158131A true CH158131A (en) 1932-10-31

Family

ID=25716457

Family Applications (1)

Application Number Title Priority Date Filing Date
CH158131D CH158131A (en) 1930-05-19 1931-05-18 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH158131A (en)

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