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CH120713A - Process for the preparation of 6,6'-diaminoisodibenzanthrone. - Google Patents

Process for the preparation of 6,6'-diaminoisodibenzanthrone.

Info

Publication number
CH120713A
CH120713A CH120713DA CH120713A CH 120713 A CH120713 A CH 120713A CH 120713D A CH120713D A CH 120713DA CH 120713 A CH120713 A CH 120713A
Authority
CH
Switzerland
Prior art keywords
bzl
preparation
blue
sulfuric acid
diaminoisodibenzanthrone
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 CH120713A publication Critical patent/CH120713A/en

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

Description

  

  Verfahren zur Darstellung von     6,6'-Diaminoisodibenzanthron.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung von     6.6'-Di-          aminoisodibenzanthron.       Das Verfahren besteht darin, dass man       6.6'-Diamino-Bzl,        Bzl'-benzanthronylsulfid     folgender Formel:  
EMI0001.0006     
    mit     alkalischen    Kondensationsmitteln, insbe  sondere     alkoholischem    Alkali behandelt.

      <I>Beispiel</I>  In eine auf 185 bis 140   erwärmte  Schmelze von 100 Gewichtsteilen     Ätzkali     und 80 Gewichtsteilen     Äthylalkohol    werden  20 Gewichtsteile     6.6'-Diamino-Bzl,        Bzl'-          benzanthronylsulfid    (dargestellt durch Ein  wirkung von     Natriumpolysulfid    auf     6-Nitro-          Bzl-brombenzanthron    bei Temperaturen von  180 bis<B>1510)</B> eingerührt. Das Gemisch wird  etwa 1 Stunde bei<B>135</B> bis 140   gehalten,  mit Wasser aufgenommen und solange Luft  eingeleitet, bis kein Farbstoff in Form der       Leukoverbindung    mehr vorhanden ist.

   Durch    Absaugen und Waschen mit Wasser erhält  .man den Farbstoff. Er stellt     ein    blauviolet  tes Pulver dar, das sich in konzentrierter       ,Schwefelsäure    mit grüner Farbe löst und  aus blauer     Hydrosulfitküpe    Baumwolle     viol-          lettblau    färbt. Der Farbstoff kann durch  Fraktionieren aus Schwefelsäure in     bekaDn-          ter    Weise gereinigt werden.  



  An Stelle von Äthylalkohol     kann    man  auch andere Alkohole, an Stelle     vor-    Kali  hydrat andere     Ätzalkalien        verwenden.  



  Process for the preparation of 6,6'-diaminoisodibenzanthrone. The subject of this additional patent is a process for the preparation of 6,6'-di-aminoisodibenzanthrone. The procedure consists in that you can 6.6'-diamino-Bzl, Bzl'-benzanthronyl sulfide of the following formula:
EMI0001.0006
    treated with alkaline condensation agents, in particular special alcoholic alkali.

      <I> Example </I> In a melt heated to 185 to 140 parts by weight of caustic potash and 80 parts by weight of ethyl alcohol, 20 parts by weight of 6.6'-diamino-Bzl, Bzl'-benzanthronyl sulfide (represented by the action of sodium polysulfide on 6-nitro- Bzl-brombenzanthron stirred in at temperatures from 180 to <B> 1510) </B>. The mixture is kept at 135 to 140 for about 1 hour, taken up with water and air passed in until there is no longer any dye in the form of the leuco compound.

   The dye is obtained by suctioning off and washing with water. It is a blue-violet powder that dissolves in concentrated sulfuric acid with a green color and turns cotton into violet-blue from a blue hydrosulfite vat. The dye can be purified in a known manner by fractionating it from sulfuric acid.



  Instead of ethyl alcohol, other alcohols can also be used, and other caustic alkalis can be used instead of potassium hydrate.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 6. 6'-Di- aminoisodibenzantliron, dadurch gekenn zeichnet, dass man 6. 6'-Diamino-Bzl, Bzl'- benzanthronylsulfid mit einem alkalischen Kondensationsmittel behandelt. Das neue Produkt ist ein dunkelviolettes Pulver, das sich in konzentrierter Schwefelsäure mit grüner Farbe löst und aus blauer Hydro- sulfitküpe Baumwolle blauviolett färbt. Der Farbstoff kann durch Fraktionieren aus Schwefelsäure gereinigt werden. PATENT CLAIM: Process for the preparation of 6. 6'-di-aminoisodibenzantlirone, characterized in that 6. 6'-diamino-Bzl, Bzl'-benzanthronyl sulfide is treated with an alkaline condensation agent. The new product is a dark violet powder that dissolves in concentrated sulfuric acid with a green color and turns cotton blue-violet from a blue hydrosulfite vat. The dye can be purified by fractionation from sulfuric acid.
CH120713D 1924-10-20 1925-10-19 Process for the preparation of 6,6'-diaminoisodibenzanthrone. CH120713A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE120713X 1924-10-20
CH119233T 1927-12-05

Publications (1)

Publication Number Publication Date
CH120713A true CH120713A (en) 1927-06-16

Family

ID=25709238

Family Applications (1)

Application Number Title Priority Date Filing Date
CH120713D CH120713A (en) 1924-10-20 1925-10-19 Process for the preparation of 6,6'-diaminoisodibenzanthrone.

Country Status (1)

Country Link
CH (1) CH120713A (en)

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