CH173980A - Process for the preparation of a dye of the anthracene series. - Google Patents

Process for the preparation of a dye of the anthracene series.

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Publication number
CH173980A
CH173980A CH173980DA CH173980A CH 173980 A CH173980 A CH 173980A CH 173980D A CH173980D A CH 173980DA CH 173980 A CH173980 A CH 173980A
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CH
Switzerland
Prior art keywords
dye
preparation
anthracene series
water
orange
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 CH173980A publication Critical patent/CH173980A/en

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Description

  

  Verfahren zur Darstellung eines     Farbstoffes    der     Anthracenreihe.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Darstellung eines Farbstoffes  der     Anthracenreihe,    welches dadurch gekenn  zeichnet ist, dass man den     2-Amino-3-methoxy-          anthrahydrochinon-9.        t0-dischwefelsäureester     in alkalischem     Medium    mit     Bleisuperogyd     oxydiert.  



  <I>Beispiel:</I>  Eine Lösung von 45,8 Gewichtsteilen  des     Natriuaisalzes    des     2-Amino-3-methoxy-          'anthi-ahydrochinon-9.10-dischwefelsäureesters     und 140 Gewichtsteilen Natronlauge     (320B6)     in 500 Gewichtsteilen Wasser, werden mit       250        Gewichtsteilen        einer        Pb02-Paste        (49        %)     versetzt und 2 Stunden bei 80-85 0 gerührt.  Nun wird abgesaugt und aus dem rotorange  gefärbten Filtrat durch     Aussalzen    oder durch  Eindampfen zur Trockne eine orangerote  Substanz erhalten.

   Durch     Umlösen    aus Was  ser und     Aussalzen    erhält man als Endpro  dukt des Verfahrens den neuen     Farbstoff    als  schöne, orange gefärbte Nadeln, die sich mit  goldgelber Farbe und schwacher Fluoreszenz  in Wasser lösen. Beim Ansäuern der Lösung  mit Mineralsäure schlägt die Farbe über  <I>Grün</I> nach Blau     um,    und bald scheidet sich    eine blauviolette Verbindung ab, die sich in  Wasser unter Zusatz von Soda mit blau  stichig-roter Farbe löst. Durch die Einwir  kung saurer Oxydationsmittel, z. B. Natrium  nitrit und Salzsäure oder durch Behandeln  der Reaktionsprodukte mit verdünnter Mine  ralsäure bei Anwesenheit oxydierend wirken  der Salze wie z. B.

   Kupfersulfat wird sowohl  aus der gelben, als auch aus der blauvioletten  Verbindung ein grünblauer     güpenfarbstoff     erhalten.. der wohl     3.3'-Dimethoxy-N-dihydro-          1.2.2'.1'-anthrachinonazin    darstellt.



  Process for the preparation of a dye of the anthracene series. The subject of the present patent is a process for the preparation of a dye of the anthracene series, which is characterized in that the 2-amino-3-methoxy-anthrahydroquinone-9. t0-disulfuric acid ester oxidized in an alkaline medium with lead superogyd



  <I> Example: </I> A solution of 45.8 parts by weight of the sodium salt of the 2-amino-3-methoxy- 'anthi-ahydroquinone-9.10-disulfuric acid ester and 140 parts by weight of sodium hydroxide solution (320B6) in 500 parts by weight of water are mixed with 250 Parts by weight of a Pb02 paste (49%) were added and the mixture was stirred at 80-85 ° for 2 hours. It is then filtered off with suction and an orange-red substance is obtained from the red-orange colored filtrate by salting out or by evaporation to dryness.

   By dissolving from water and salting out the end product of the process, the new dye is obtained as beautiful, orange-colored needles that dissolve in water with a golden yellow color and weak fluorescence. When the solution is acidified with mineral acid, the color changes from <I> green </I> to blue, and soon a blue-violet compound is deposited, which dissolves in water with the addition of soda with a blue-tinged red color. By the action of acidic oxidizing agents such. B. sodium nitrite and hydrochloric acid or by treating the reaction products with dilute mine ralsäure in the presence of an oxidizing effect of the salts such. B.

   Copper sulphate is obtained from the yellow as well as from the blue-violet compound a green-blue color pigment .. which is probably 3.3'-dimethoxy-N-dihydro-1.2.2'.1'-anthraquinone azine.

 

Claims (1)

PATENTANSPRÜCH: Verfahren zur Darstellung eines Farb stoffes der Antbracenreihe, dadurch gekenn zeichnet, dass man den 2-Amino-3-methoay- anthrahydrochinon-9 . 10-dischwefelsäureester in alkalischem Medium mit Bleisuperoxyd oxydiert. Der neue Farbstoff stellt orangegefärbte Kristalle dar, die sich in-Wasser mit gold- gelberFarbe und schwacherFluoreszenz lösen. PATENT CLAIM: Process for the preparation of a dye of the anthracene series, characterized in that the 2-amino-3-methoay-anthrahydroquinone-9. 10-disulfuric acid ester oxidized with lead peroxide in an alkaline medium. The new dye is orange-colored crystals that dissolve in water with a golden-yellow color and weak fluorescence.
CH173980D 1932-03-26 1933-03-21 Process for the preparation of a dye of the anthracene series. CH173980A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE173980X 1932-03-26
CH170092T 1933-03-21

Publications (1)

Publication Number Publication Date
CH173980A true CH173980A (en) 1934-12-15

Family

ID=25718866

Family Applications (1)

Application Number Title Priority Date Filing Date
CH173980D CH173980A (en) 1932-03-26 1933-03-21 Process for the preparation of a dye of the anthracene series.

Country Status (1)

Country Link
CH (1) CH173980A (en)

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