CH134830A - 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
CH134830A
CH134830A CH134830DA CH134830A CH 134830 A CH134830 A CH 134830A CH 134830D A CH134830D A CH 134830DA CH 134830 A CH134830 A CH 134830A
Authority
CH
Switzerland
Prior art keywords
bzl
preparation
sulfide
melting point
dye intermediate
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 CH134830A publication Critical patent/CH134830A/en

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Description

  

  Verfahren zur Darstellung eines     Farbstoffzwischenproduktes    der     Benzanthronreihe.       Gegenstand dieser Erfindung ist ein Ver  fahren zur Darstellung eines     Diphenoxy-          Bzl.-Bzl'-benzanthronylsulfids     
EMI0001.0005     
    welches dadurch gekennzeichnet ist,     daB    man       Dibrom-Bzl-Bz.l'-benzanthronylsulfid    vom  Schmelzpunkt     HO',    welches man durch Um  setzung von     Brom-Bz-l-brombenzanthron    vom  Schmelzpunkt 255 bis 257   mit     Natrium-          sulfid    erhalten kann, mit Phenol bei höherer  Temperatur behandelt.

   Das erhaltene Kon  densationsprodukt kann als     Zwischenprodukt     für die Herstellung von Farbstoffen dienen.    <I>Beispiel:</I>  50 Gewichtsteile     DibrombenzaDthron.5-i-          sulfid    vom Schmelzpunkt<B>360',</B> welches man  durch Umsetzung von     Brom-Bz-l-brombenz-          anthron    vom Schmelzpunkt 255 bis 257   mit       Natriumpolysulfid    erhalten kann, werden mit  100 Gewichtsteilen Phenol, 15 Gewichtstei  len entwässertem     Kaliumkarbonat    und 0,5  Gewichtsteilen Kupferpulver unter Rühren      auf 160 bis 170   erhitzt, bis sich kein unver  ändertes Ausgangsmaterial mehr nachweisen  lässt.

   Durch     Auskochen    mit verdünnter Na  tronlauge     wird    das Umsetzungsprodukt vom  Phenol befreit,     abgesaugt    und mit Wasser       gewasehen.    Es ist ein gelbbraunes Pulver  und löst sich in konzentrierter Schwefelsäure  mit grüner Farbe.



  Process for the preparation of a dye intermediate of the benzanthrone series. This invention relates to a process for the preparation of a Diphenoxy- Bzl.-Bzl'-benzanthronyl sulfide
EMI0001.0005
    which is characterized in that dibromo-Bzl-Bz.l'-benzanthronyl sulfide with a melting point of HO ', which can be obtained by reacting bromine-Bz-l-bromobenzanthrone with a melting point of 255 to 257 with sodium sulfide, with phenol treated at a higher temperature.

   The condensation product obtained can serve as an intermediate for the production of dyes. <I> Example: </I> 50 parts by weight of DibrombenzaDthron.5-i-sulfide with a melting point of <B> 360 ', </B> which is obtained by reacting bromine-Bz-1-bromobenzanthrone with a melting point of 255 to 257 Sodium polysulfide can be obtained with 100 parts by weight of phenol, 15 parts by weight of dehydrated potassium carbonate and 0.5 parts by weight of copper powder heated to 160 to 170 with stirring until no unchanged starting material can be detected.

   The reaction product is freed from the phenol by boiling with dilute sodium hydroxide solution, suction filtered and washed with water. It is a yellow-brown powder and dissolves in concentrated sulfuric acid with a green color.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Diplien- oxy-Bzl-Bzl'-benzanthronylsulfids, dadurch gekennzeichnet, da3 man Dibrom-Bzl-Bzl'- benzanthronjsulfid vofm Schmelzpunkt <B>360'</B> C, welches mann durch Umsetzung von Brom-Bz-l-brombenzanthron vom Schmelz punkt 255 bis 257 G mit Natriumpolysulfid erhalten kann, PATENT CLAIM: Process for the preparation of a Diplienoxy-Bzl-Bzl'-benzanthronyl sulfide, characterized in that dibromo-Bzl-Bzl'-benzanthrone sulfide is obtained from the melting point <B> 360 '</B> C, which is obtained by reacting bromine Bz-l-bromobenzanthrone from melting point 255 to 257 G can be obtained with sodium polysulphide, mit Phenol bei erhöhter Tem peratur zur Reaktion bringt. Das so erhält liche Diphenoxy-Bz.l-Bzl'-benzanthronyl- sulfid stellt ein wertvolles Zwischenprodukt für die Herstellung von Farbstoffen dar. Es ist ein gelbbraunes Pulver und löst sich in konzentrierter Schwefelsäure mit grüner Farbe. reacts with phenol at elevated temperature The diphenoxy-Bz.l-Bzl'-benzanthronyl sulfide thus obtained is a valuable intermediate product for the production of dyes. It is a yellow-brown powder and dissolves in concentrated sulfuric acid with a green color.
CH134830D 1926-08-02 1927-08-01 Process for the preparation of a dye intermediate of the benzanthrone series. CH134830A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE134830X 1926-08-02
CH130151T 1927-08-01

Publications (1)

Publication Number Publication Date
CH134830A true CH134830A (en) 1929-08-15

Family

ID=25711371

Family Applications (1)

Application Number Title Priority Date Filing Date
CH134830D CH134830A (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) CH134830A (en)

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