CH179955A - Process for the production of 2,3-diaminoanthraquinone. - Google Patents

Process for the production of 2,3-diaminoanthraquinone.

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Publication number
CH179955A
CH179955A CH179955DA CH179955A CH 179955 A CH179955 A CH 179955A CH 179955D A CH179955D A CH 179955DA CH 179955 A CH179955 A CH 179955A
Authority
CH
Switzerland
Prior art keywords
production
diaminoanthraquinone
parts
aqueous ammonia
treated
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 CH179955A publication Critical patent/CH179955A/en

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

Description

  

  Verfahren zur Herstellung von     2.3-Diaminoanthrachinon.       Das Hauptpatent betrifft ein Verfahren  zur Herstellung von 2-     Amino-3-chloranthra-          chinon,    bei dem     2.3-Dichlor-anthrachinon     mit wässerigem Ammoniak so lange behan  delt wird, bis eine     entnommene    und auf  gearbeitete Probe nach dem     Umkristalli-          sieren    aus einem organischen     Lösuno-smittel     bei etwa 300   C schmilzt.

      Es wurde nun gefunden, dass man in vor  teilhafter Weise     --1.        3-Diaminoanthrachinon     erhalten kann, wenn man     -).        3-Dichloranthra-          chinon    so lange mit wässerigem Ammoniak  behandelt, bis eine entnommene und auf  gearbeitete Probe chlorfrei ist. Es ist zweck  mässig, hierbei     höherkonzentriertes,    beispiels  weise     -10    bis 50%iges wässeriges     Ammonialz-          zu    verwenden. doch kann man auch die Um  setzung mit     verdünnterem,    beispielsweise 10  bis 20 %     igem    Ammoniak ausführen.

   Es ist  vorteilhaft, die Behandlung in Gegenwart    von Katalysatoren, insbesondere von Kupfer  verbindungen, auszuführen.    <I>Beispiel 1:</I>    Man erhitzt 100 Teile 2 .     3-Dichloranthra-          chinon    mit 400 Teilen 50 %     igem    wässerigem  Ammoniak und 3 Teilen Kupfersulfat 24       Stunden    lang auf 205   C. Nach dem Ab  kühlen saugt man ab, wäscht den Rückstand  mit Wasser aus und trocknet. Das Reaktions  produkt kann     gewünschtenfalls    durch frak  tionierte Fällung aus seiner Lösung in kon  zentrierter Schwefelsäure noch gereinigt wer  den.

           Beispiel   <I>2:</I>    100 Teile 2.     3-Dichloranthrachinon    wer  den mit 2000 Teilen 25%igem Ammoniak  und 10 Teilen kristallisiertem Kupfersulfat  im     Rührwerksautoklaven    30     Stunden    lang  auf 200' C erhitzt. Die Aufarbeitung er  folgt wie im Beispiel 1.



  Process for the production of 2,3-diaminoanthraquinone. The main patent relates to a process for the production of 2-amino-3-chloroanthraquinone in which 2,3-dichloro-anthraquinone is treated with aqueous ammonia until a sample taken and processed after recrystallization from an organic solution -smittel melts at about 300 C.

      It has now been found that in a beneficial way --1. 3-diaminoanthraquinone can be obtained if one -). Treated 3-dichloroanthraquinone with aqueous ammonia until a sample taken and processed is chlorine-free. It is useful to use more concentrated, for example -10 to 50% aqueous ammonia. but you can also implement the implementation with more dilute, for example 10 to 20% ammonia.

   It is advantageous to carry out the treatment in the presence of catalysts, in particular copper compounds. <I> Example 1: </I> 100 parts are heated 2. 3-dichloroanthraquinone with 400 parts of 50% aqueous ammonia and 3 parts of copper sulfate at 205 ° C. for 24 hours. After cooling, it is suctioned off, the residue is washed with water and dried. If desired, the reaction product can be purified by fractional precipitation from its solution in concentrated sulfuric acid.

           Example <I> 2: </I> 100 parts of 2. 3-dichloroanthraquinone are heated to 200 ° C. for 30 hours in a stirrer autoclave with 2000 parts of 25% ammonia and 10 parts of crystallized copper sulfate. Working up he follows as in Example 1.

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung von ? . 3-Di- aminoanthra'chinon, dadurch gekennzeichnet, dass man 2 .3-Diehloranthraehinon so lange mit wässerigem Ammoniak behandelt, bis eine entnommene und aufgearbeitete Probe praktisch chlorfrei ist. PATENT CLAIM Process for the production of? . 3-Di-aminoanthraquinone, characterized in that 2 .3-Diehloranthraehinon treated with aqueous ammonia until a sample taken and worked up is practically chlorine-free.
CH179955D 1933-06-21 1934-05-26 Process for the production of 2,3-diaminoanthraquinone. CH179955A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE179955X 1933-06-21
CH176028T 1934-05-26

Publications (1)

Publication Number Publication Date
CH179955A true CH179955A (en) 1935-09-30

Family

ID=25719779

Family Applications (1)

Application Number Title Priority Date Filing Date
CH179955D CH179955A (en) 1933-06-21 1934-05-26 Process for the production of 2,3-diaminoanthraquinone.

Country Status (1)

Country Link
CH (1) CH179955A (en)

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