CH292304A - Process for the production of a vat dye. - Google Patents

Process for the production of a vat dye.

Info

Publication number
CH292304A
CH292304A CH292304DA CH292304A CH 292304 A CH292304 A CH 292304A CH 292304D A CH292304D A CH 292304DA CH 292304 A CH292304 A CH 292304A
Authority
CH
Switzerland
Prior art keywords
parts
mixture
production
vat
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH292304A publication Critical patent/CH292304A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B5/00Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/24Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position
    • C09B5/26Carbazoles of the anthracene series
    • C09B5/28Anthrimide carbazoles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 287870.    Verfahren     zur        Herstellung        eines        Küpenfarbstoffes.       Es wurde gefunden, dass man zu einem  wertvollen     Küpenfarbstoff    gelangt, wenn man    das     1,1'-4',1"-4",l."'-4"',1""-Pentanthrimid     der Formel  
EMI0001.0008     
    mit. Aluminiumchlorid unter Zusatz eines     Me-          thylpyridins    der     Carbazolierung    unterwirft.  



  Der neue Farbstoff bildet ein dunkles Pul  ver, das sich in konzentrierter Schwefelsäure  mit braunschwarzer Farbe löst und Baum  wolle aus brauner     Küpe    in     eehten    grauen Tö  nen färbt.  



  Die     Carbazolierung    erfolgt beim - vorlie  genden Verfahren mittels eines     Methylpyri-          dins    wie     a-Picolin    oder des technischen     l,y-          Pieolingemisches.    Sie wird vorteilhaft bei  Temperaturen     durehgeführt,    die zwischen 120       tnid    l.80 , beispielsweise in der Höhe von 140   liegen. Je     naeli    Wahl des     Methylpyridins    und  der     Umsetzungstemperatur    können sich in  den Eigenschaften des erhaltenen Produktes  gewisse Unterschiede, z.

   B. hinsichtlich des  Farbtons der damit erzeugten     Küpenfärbun-          gen,    ergeben.  



  Die Aufarbeitung der Reaktionsgemische  kann in üblicher Weise erfolgen, z. B. indem  man den Reaktionsansatz nach dem Verdün  nen mit Wasser mit     Alkalihydroxyd    alkalisch  macht und durch Zusatz eines passenden Re  duktionsmittels, wie     Nariumhydrosulfit,    den    erhaltenen Farbstoff     verküpt    und hierauf  durch Oxydation, z. B. mittels Luft, abschei  det.  



  <I>Beispiel 1:</I>  50 Teile Aluminiumchlorid werden bei 20  bis 80  unter Rühren in 125 Teile     a-Picolin     eingetragen. Man erhitzt auf 100 bis 110  und  gibt dann 10 Teile       Pentanthrimid    zu. Innerhalb 40 Minuten wird  die Temperatur unter gleichzeitigem     Abdestil-          lieren    des überschüssigen     a-Picolins    auf 140   erhöht. Man lässt eine Stunde bei 140  rühren  und giesst das Reaktionsgemisch in 2000 Teile  Bis.

   Zur erhaltenen Suspension gibt man 300       Teile        30        %        ige        Natriumhydroxydlösung,        rührt     einige Zeit, saugt ab, wäscht neutral und  trocknet.  



  Die Herstellung des       1""-Pentanthrimides    ist im Hauptpatent be  schrieben.  



  <I>Beispiel 2:</I>  50 Teile Aluminiumchlorid werden bei 20  bis 80  unter Rühren in 80 Teile eines tech  nischen Gemisches von     ,B-    und     y-Picolin,    das      etwas     Dimethylpyridin    enthält, eingetragen.  Man erhitzt auf 100  und gibt dann 10 Teile       1,1'-4',1"-4",1"'-4"',1""-Pentanthrimid    zu.  Innerhalb 45 Minuten wird die Temperatur  auf     140     erhöht. Man lässt eine Stunde bei       140     rühren und giesst das Reaktionsgemisch  in 2000 Teile Eis. Es werden 300 Teile     30o/oige          Natriumhydroxydlösung    zugegeben und der    Farbstoff wird abgesaugt, neutral gewaschen  und getrocknet.



      Additional patent to main patent No. 287870. Process for the production of a vat dye. It has been found that a valuable vat dye is obtained by using the 1,1'-4 ', 1 "-4", 1. "' - 4" ', 1 "" - pentanthrimide of the formula
EMI0001.0008
    With. Aluminum chloride is subjected to carbazolation with the addition of a methylpyridine.



  The new dye forms a dark powder that dissolves in concentrated sulfuric acid with a brownish-black color and dyes cotton from a brown vat in deep gray tones.



  In the present process, carbazolation takes place by means of a methylpyridine such as a-picoline or the technical l, y-pieoline mixture. It is advantageously carried out at temperatures between 120 and 1.80, for example around 140. Depending on the choice of methylpyridine and the reaction temperature, certain differences may appear in the properties of the product obtained, e.g.

   B. with regard to the hue of the vat colors produced with it.



  The reaction mixtures can be worked up in a customary manner, for. B. by making the reaction mixture after the dilution with water with alkali metal hydroxide and alkaline by adding a suitable Re reducing agent such as sodium hydrosulfite, the dye obtained and then vatting by oxidation, eg. B. by means of air, separating det.



  <I> Example 1 </I> 50 parts of aluminum chloride are introduced into 125 parts of a-picoline at 20 to 80 times with stirring. The mixture is heated to 100 to 110 and then 10 parts of pentanthrimide are added. The temperature is increased to 140 within 40 minutes while the excess α-picoline is distilled off. The mixture is stirred for one hour at 140 and the reaction mixture is poured into 2000 parts of bis.

   300 parts of 30% strength sodium hydroxide solution are added to the suspension obtained, the mixture is stirred for some time, filtered off with suction, washed neutral and dried.



  The preparation of the 1 "" pentanthrimide is described in the main patent.



  <I> Example 2: </I> 50 parts of aluminum chloride are added at 20 to 80 parts with stirring in 80 parts of a technical mixture of γ-picoline and γ-picoline which contains some dimethylpyridine. The mixture is heated to 100 and then 10 parts 1,1'-4 ', 1 "-4", 1 "' - 4" ', 1 "" - pentanthrimide are added. The temperature is increased to 140 within 45 minutes. The mixture is stirred for one hour at 140 and the reaction mixture is poured into 2000 parts of ice. 300 parts of 30% sodium hydroxide solution are added and the dye is filtered off with suction, washed neutral and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man das 1,1'-4',1."-4",1"'-4"',1""-Pentanthrimid der Formel EMI0002.0010 mit Aluminiumchlorid unter Zusatz eines Me- thylpyridins der Carbazolierung unterwirft. Der neue Farbstoff bildet ein dunkles Pulver, das sich in konzentrierter Schwefel säure mit braunschwarzer Farbe löst und Baumwolle aus brauner Küpe in echten grauen Tönen färbt. UNTERANSPRÜCHE: 1. Claim: Process for the production of a vat dye, characterized in that the 1,1'-4 ', 1. "- 4", 1 "' - 4" ', 1 "" - pentanthrimide of the formula EMI0002.0010 subjected to carbazolation with aluminum chloride with the addition of a methylpyridine. The new dye forms a dark powder that dissolves in concentrated sulfuric acid with a brown-black color and dyes cotton from a brown vat in real gray tones. SUBCLAIMS: 1. Verfahren gemäss Patentanspruch, gekenn zeichnet durch die Verwendung von a-Picolin. 2. Verfahren gemäss Patentanspruch, ge kennzeichnet durch die Verwendung eines Gemisches aus ss- und ",-Picolin. 3. Verfahren gemäss Patentanspruch, da durch gekennzeichnet, dass man die Carbazo- lierung bei Temperaturen zwischen 1.20 bis 180 durchführt. Method according to claim, characterized by the use of a-picoline. 2. The method according to the patent claim, characterized by the use of a mixture of ss- and ", -picolin. 3. The method according to the patent claim, characterized in that the carbazolation is carried out at temperatures between 1.20 and 180 °.
CH292304D 1951-05-05 1951-05-05 Process for the production of a vat dye. CH292304A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH287870T 1951-05-05
CH292304T 1951-05-05

Publications (1)

Publication Number Publication Date
CH292304A true CH292304A (en) 1953-07-31

Family

ID=25732764

Family Applications (1)

Application Number Title Priority Date Filing Date
CH292304D CH292304A (en) 1951-05-05 1951-05-05 Process for the production of a vat dye.

Country Status (1)

Country Link
CH (1) CH292304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1077352B (en) * 1954-12-16 1960-03-10 Ciba Geigy Process for the production of anthraquinone dyes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1077352B (en) * 1954-12-16 1960-03-10 Ciba Geigy Process for the production of anthraquinone dyes

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