CH148985A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH148985A
CH148985A CH148985DA CH148985A CH 148985 A CH148985 A CH 148985A CH 148985D A CH148985D A CH 148985DA CH 148985 A CH148985 A CH 148985A
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CH
Switzerland
Prior art keywords
preparation
dye
mol
vat
vat dye
Prior art date
Application number
Other languages
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 CH148985A publication Critical patent/CH148985A/en

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Description

  

  Verfahren zur Darstellung eines     Nüpentarbstoffes.       In dem Hauptpatent     Nr.   <B>136050</B> ist ein  Verfahren zur Darstellung eines schwarzen       Küpenfarbstoffes    beschrieben, das dadurch  gekennzeichnet ist,     dass    man     l'-Arithrachi-          nonyl   <B>- 6 -</B>     aminobenzanthron        init    alkalischen  Mitteln behandelt.  



  Es wurde nun gefunden,     dass    man in ana  loger Weise ebenfalls einen wertvollen     Küpen-          farbstoff        ei-halten    kann, wenn man     Dibrom-          1'-aritlirachinonyl-6-amiiioberizarithron,    das  durch Behandeln von<B>1</B>     Mol        l'-Anthi,achiiioiiyl-          6-aminobenzanthron    bei gewöhnlicher Tempe  ratur mit mindestens<B>1</B>     Mol    Brom in Gegen  wart von     Chlorsulfonsäure    erhalten werden  kann, mit alkalisch wirkenden Mitteln be  handelt.  



  <B>.</B> Der erhaltene Farbstoff löst sich in kon  zentrierter Schwefelsäure mit graubrauner  Farbe     undgibtmitNatronlauge    und     Hydrosulfit     eine     violettbrautie        Küpe,    aus der die pflanzliche  Faser in echten, tief schwarzen Tönen ge  färbt wird.

      <I>Beispiel:</I>  <B>10</B> Teile     Dibrom-l'-anthi-achitionyl-6-ami-          nobenzanthron,    dargestellt zum Beispiel durch  Behandeln von<B>l'-</B>     Arithrachinonyl   <B>- 6 -</B>     amino-          benzatithron    in Gegenwart von     Chlorsulfon-          säure    bei gewöhnlicher Temperatur     mit    min  destens<B>1</B>     Mol    Brom, werden in eine Schmelze  von 40 Teilen     Ätzkali    und<B>20-25</B> Teilen       Äthylalkohol    bei etwa<B>150 0 C</B> eingetragen.

    Man erhöht alsdann die Temperatur der  Schmelze auf     160-165'   <B>C</B> Lind rührt bei  dieser     Ternporatur    solange, bis die     Farbstoff-          bildung    beendet ist. Die Schmelze wird mit  Wasser aufgekocht und der ausgeschiedene  Farbstoff filtriert und heiss gewaschen.



  Process for the preparation of a Nüpen Main patent no. 136050 describes a process for the preparation of a black vat dye which is characterized in that l'-arithrachinonyl aminobenzanthrone with alkaline agents is used treated.



  It has now been found that you can also hold a valuable vat dye in an analogous manner if you dibromo-1'-aritlirachinonyl-6-amiiioberizarithron, which is obtained by treating <B> 1 </B> Mol l ' -Anthi, achiiioiiyl- 6-aminobenzanthron can be obtained at normal temperature with at least 1 mol of bromine in the presence of chlorosulfonic acid, treated with alkaline agents.



  <B>. </B> The dye obtained dissolves in concentrated sulfuric acid with a gray-brown color and, with caustic soda and hydrosulfite, creates a violet bridal vat from which the vegetable fibers are dyed in real, deep black tones.

      <I> Example: </I> <B> 10 </B> parts of dibromo-l'-anthi-achitionyl-6-aminobenzanthrone, made for example by treating <B> l'- </B> arithraquinonyl <B> - 6 - </B> aminobenzatithrone in the presence of chlorosulphonic acid at normal temperature with at least <B> 1 </B> mol of bromine, are mixed in a melt of 40 parts of caustic potash and <B> 20- 25 parts of ethyl alcohol entered at about 150 ° C.

    The temperature of the melt is then increased to 160-165 ° C. and the mixture is stirred at this temperature until the formation of the dye has ended. The melt is boiled with water and the precipitated dye is filtered and washed hot.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man Dibrom-I#-anthrachinotiyl-6-aminobenzanthi-on, das durch Behandeln von<B>1</B> Mol l'-Anthra- chinonyl-6-aminobenzanthron bei gewöhnlicher Temperatur mit mindestens<B>1</B> Mol Brom in Gegenwart von Chlorsulfonsäure erhalten werden kann, mit alkalisch wirkenden Mit teln behandelt. <B> PATENT CLAIM: </B> Process for the preparation of a vat dye, characterized in that dibromo-I # -anthraquinotiyl-6-aminobenzanthi-one, which is obtained by treating <B> 1 </B> mol l ' Anthraquinonyl-6-aminobenzanthrone can be obtained at ordinary temperature with at least 1 mol of bromine in the presence of chlorosulfonic acid, treated with alkaline agents. Der erhaltene Farbstoff löst sieh in kon zentrierter Schwefelsäure mit graubrauner Fai-beundgibtmitNatrotilauge(indHydi,ostilfit eine violottbraune Küpe, aus der die pflanz liche Faser in echten, tief schwarzen Tönen gefärbt wird. The dye obtained dissolves in concentrated sulfuric acid with gray-brown Fai-be and with sodium hydroxide solution (indHydi, ostilfit) a violet-brown vat from which the vegetable fibers are dyed in real, deep black tones.
CH148985D 1928-07-07 1930-06-13 Process for the preparation of a vat dye. CH148985A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH136050T 1928-07-07
DE148985X 1929-07-02

Publications (1)

Publication Number Publication Date
CH148985A true CH148985A (en) 1931-08-15

Family

ID=25712636

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148985D CH148985A (en) 1928-07-07 1930-06-13 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH148985A (en)

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