CH134831A - Process for the preparation of a dye intermediate of the benzanthrone series. - Google Patents

Process for the preparation of a dye intermediate of the benzanthrone series.

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Publication number
CH134831A
CH134831A CH134831DA CH134831A CH 134831 A CH134831 A CH 134831A CH 134831D A CH134831D A CH 134831DA CH 134831 A CH134831 A CH 134831A
Authority
CH
Switzerland
Prior art keywords
preparation
bzl
dye intermediate
melting point
benzanthrone series
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 CH134831A publication Critical patent/CH134831A/en

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

Description

  

  Verfahren zur Darstellung eines     Farbstoffzwischenproduktes    der     Benzanthronreihe.       Gegenstand der Erfindung ist ein Ver  fahren zur Darstellung eines     Bzl-Bzl'-Benz-          anthronylsulfiddithiokresyläthers     
EMI0001.0005     
    welches dadurch gekennzeichnet ist, dass man       Dibrom-Bzl-13z1'-benzanthronylsulfid    vom  Schmelzpunkt<B>36,0',</B> welches man durch     ZTrn-          setzung    von     Brom-Bz-l-brombenzanthron    vom  Schmelzpunkt 255 bis 257   mit     Natrium-          polysulfid    in der Wärme erhält,

   mit     p-Thio-          kresol    bei höherer Temperatur behandelt.  Das Kondensationsprodukt stellt ein Zwi  schenprodukt für die Herstellung von Farb  stoffen dar.    <I>Beispiel:</I>    500 Gewichtsteile     Dibrom-Bzl-Bzl'-benz-          anthronylsulfid    vom Schmelzpunkt 360  ,  welches man durch Umsetzung von     Brom-          Bz-l-brombenzanthron    vom Schmelzpunkt  255 bis 257   mit     Natriumpolysulfid    in der  Wärme erhält,

   werden in 1000 Gewichts  teilen     p-Thiokresol    mit 150     Gewichtsteilen     entwässertem     galiumkarbonat    unter Zusatz       einer        Spur        gupfersaiz    bei<B>160</B> bis<B>170'</B>      so lange verrührt, bis eine aufgearbeitete  Probe keinen Halogengehalt .mehr zeigt. Das  Umsetzungsprodukt kann durch Behandeln  mit Alkohol oder auch durch Wasserdampf  destillation vom     p-Thiokresol    und durch       Waschen    mit Wasser von den     anorgaDi-          schen        ,Salzen    befreit werden.

   Der so erhält  liche     Bzl-Bzl'-Benzanthronylsulfiddithiokre-          syläther    ist ein hellbraunes Pulver; es löst  sich in konzentrierter Schwefelsäure in     grii-          ner    Farbe.

           UNTERANSPRÜCHE:       Verfahren zur Darstellung eines     Bzl-          Bzl'-        Benzanthronylsulfiddithiokre@yläthers,     dadurch gekennzeichnet, dass man Dibrom-         Bz1-Bzl'-benzanthronylsulfid    vom Schmelz  punkt<B>360</B>  , welches man ,durch Umsetzung  von     Brom-Bz-l-brombenzanthron    vom  Schmelzpunkt 255 bis 257   mit     Natrium-          polysülfid    in der Wärme erhält, mit     p-Thio-          kresol    bei höherer Temperatur zur Reaktion  bringt.

   Das so erhaltene Umsetzungsprodukt  stellt ein wertvolles     Zwischenprodukt    für  die Herstellung von Farbstoffen dar. Es  ist ein hellbraunes Pulver, das sich in     kon-          zentrierter    Schwefelsäure mit grüner Farbe  löst.



  Process for the preparation of a dye intermediate of the benzanthrone series. The invention relates to a process for the preparation of a Bzl-Bzl'-Benz- anthronylsulfiddithiocresyläthers
EMI0001.0005
    which is characterized in that dibromo-Bzl-13z1'-benzanthronyl sulfide of melting point <B> 36.0 ', </B> which is obtained by decomposing bromine-Bz-1-bromobenzanthrone of melting point 255 to 257 with sodium - receives polysulphide in the heat,

   treated with p-thiocresol at a higher temperature. The condensation product is an intermediate product for the production of dyes. <I> Example: </I> 500 parts by weight of dibromo-Bzl-Bzl'-benzanthronyl sulfide with a melting point of 360, which is obtained by reacting bromine-Bz-l- brombenzanthron from melting point 255 to 257 with sodium polysulphide in the heat,

   p-thiocresol is mixed in 1000 parts by weight with 150 parts by weight of dehydrated galium carbonate with the addition of a trace of gupfersaiz at <B> 160 </B> to <B> 170 '</B> until a processed sample no longer shows any halogen content . The reaction product can be freed from p-thiocresol by treatment with alcohol or also by steam distillation and from the inorganic salts by washing with water.

   The Bzl-Bzl'-Benzanthronylsulfiddithiocre- syläther thus obtained is a light brown powder; it dissolves in concentrated sulfuric acid in a green color.

           SUBClaims: A method for the preparation of a Bzl- Bzl'- Benzanthronylsulfiddithiokre @ yläthers, characterized in that dibromobz1-Bzl'-benzanthronyl sulfide of melting point <B> 360 </B>, which is obtained by converting bromine-Bz- l-bromobenzanthrone with a melting point of 255 to 257 is obtained with sodium polysulfide in the heat, and reacts with p-thiocresol at a higher temperature.

   The reaction product obtained in this way is a valuable intermediate product for the production of dyes. It is a light brown powder that dissolves in concentrated sulfuric acid with a green color.
CH134831D 1926-08-02 1927-08-01 Process for the preparation of a dye intermediate of the benzanthrone series. CH134831A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE134831X 1926-08-02
CH130151T 1927-08-01

Publications (1)

Publication Number Publication Date
CH134831A true CH134831A (en) 1929-08-15

Family

ID=25711372

Family Applications (1)

Application Number Title Priority Date Filing Date
CH134831D CH134831A (en) 1926-08-02 1927-08-01 Process for the preparation of a dye intermediate of the benzanthrone series.

Country Status (1)

Country Link
CH (1) CH134831A (en)

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