CH120715A - Process for the preparation of Bz2-Bz2'-dimethoxyisodibenzanthrone. - Google Patents

Process for the preparation of Bz2-Bz2'-dimethoxyisodibenzanthrone.

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Publication number
CH120715A
CH120715A CH120715DA CH120715A CH 120715 A CH120715 A CH 120715A CH 120715D A CH120715D A CH 120715DA CH 120715 A CH120715 A CH 120715A
Authority
CH
Switzerland
Prior art keywords
blue
preparation
dimethoxyisodibenzanthrone
bzl
dissolves
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 CH120715A publication Critical patent/CH120715A/en

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

Description

  

      Verfahren    zur     Darstellung    von     Bz2-Bz2'-Diriiethogyisodibenzanthron.       Das Verfahren besteht darin,     dass    man       Bz2,Bz2'-Dimethogy-Bz1,Bz1'-benzanthronyl-          sulfid    von folgender     I'ormel:     
EMI0001.0008     
    mit alkalischen     Kondensationsmitteln,        insbe=     sondere     alkoholischem    Alkali,     behandelt.     



       Beispiel:     10 Gewichtsteile     Bz2,Bz2'-Dimethpxy-          Bz1,Bzl'-benzantUronylsulfid,    erhalten durch  Umsetzung von     Bz2-Methoxy-Bzl-halogen-          benzanthron    mit     Natriumpolysulfid    werden  in     eine    Schmelze von 50     Gewichtsteilen    Ätz  kali     und-4    Gewichtsteilen     Äthylalkohol    bei  ungefähr<B>130'</B> eingetragen und das Reak  tionsgemisch bis zur     Beendigung    der     Farb-          stoffbildung    bei dieser     Tempeiatur    gerührt.

    Man     verdünnt    mit Wasser, leitet. in die Sus  pension Luft     ein,    solange noch Farbstoff in    Form der     Leukoverbindung    in. Lösung ist,       filtriert    und wäscht mit Wasser gut aus. Der.

    Farbstoff stellt     ein    blauschwarzes Pulver  dar; das sich in konzentrierter -Schwefelsäure  mit     rotvioletter        Farbe    löst und aus blauer       Hydrosulfitküpe    Baumwolle in blauen Tönen       anf        ärbt     An Stelle     von,        Äthylalkohol    kann man  auch andere Alkohole, an Stelle von Kali  hydrat andere     Ätzälkalien    verwenden.



      Method for the preparation of Bz2-Bz2'-Diriiethogyisodibenzanthron. The procedure consists in that you get Bz2, Bz2'-Dimethogy-Bz1, Bz1'-benzanthronyl sulfide from the following formula:
EMI0001.0008
    treated with alkaline condensation agents, especially alcoholic alkali.



       Example: 10 parts by weight of Bz2, Bz2'-dimethpxy-Bz1, Bzl'-benzantUronylsulfid, obtained by reacting Bz2-methoxy-Bzl-halogen-benzanthrone with sodium polysulfide are in a melt of 50 parts by weight of caustic potash and -4 parts by weight of ethyl alcohol at about < B> 130 '</B> and the reaction mixture was stirred at this temperature until the formation of the dye had ended.

    One dilutes with water, conducts. Air is introduced into the suspension as long as there is still dye in the form of the leuco compound in the solution, filtered and washed thoroughly with water. The.

    Dye is a blue-black powder; which dissolves in concentrated sulfuric acid with a red-violet color and dyes cotton in blue tones from a blue hydrosulphite vat.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Bz2,Bz2'- Dimethoxyisodibenzänthron, dadurch gekenn zeichnet, dass-män Bz2,Bz2'-Diinethoxy-Bzl, Bz1'-benzanthronylsnlfid mit einem alkali schen goridensationsmittel behandelt. PATENT CLAIM: Process for the preparation of Bz2, Bz2'-dimethoxyisodibenzanthrone, characterized in that Bz2, Bz2'-diinethoxy-Bzl, Bz1'-benzanthronylsnlfid are treated with an alkaline goridensating agent. Das neue Produkt stellt ein. blauschwarzes Pulver dar,, das. sich in konzentrierter Schwefelsäure mit rotvioletter Farbe-- löst und aus blauer Hydrosulfitküpe Baumwolle in blauen Tönen anfärbt. - The new product is discontinuing. A blue-black powder that dissolves in concentrated sulfuric acid with a red-violet color and dyes cotton in blue tones from a blue hydrosulfite vat. -
CH120715D 1924-10-20 1925-10-19 Process for the preparation of Bz2-Bz2'-dimethoxyisodibenzanthrone. CH120715A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE120715X 1924-10-20
CH119233T 1927-12-05

Publications (1)

Publication Number Publication Date
CH120715A true CH120715A (en) 1927-07-01

Family

ID=25709240

Family Applications (1)

Application Number Title Priority Date Filing Date
CH120715D CH120715A (en) 1924-10-20 1925-10-19 Process for the preparation of Bz2-Bz2'-dimethoxyisodibenzanthrone.

Country Status (1)

Country Link
CH (1) CH120715A (en)

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