AT26616B - Process for the preparation of a yellow anthracene dye. - Google Patents

Process for the preparation of a yellow anthracene dye.

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Publication number
AT26616B
AT26616B AT26616DA AT26616B AT 26616 B AT26616 B AT 26616B AT 26616D A AT26616D A AT 26616DA AT 26616 B AT26616 B AT 26616B
Authority
AT
Austria
Prior art keywords
yellow
preparation
anthracene dye
anthracene
dye
Prior art date
Application number
Other languages
German (de)
Original Assignee
Basf 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.)
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Publication date
Application filed by Basf Ag filed Critical Basf Ag
Application granted granted Critical
Publication of AT26616B publication Critical patent/AT26616B/en

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

Description

  

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   Man kann auch   zweckmässigerweise   der Reaktionsmasse von vornherein ein Oxydationsmittel, z. B. Salpeter, Kaliumchlorat usw. hinzufügen ; in diesem Falle braucht die Temperatur nicht   über 140-1500C   gesteigert zu werden. Durch Umkristallisieren aus Nitrobenzol, worin es in der Hitze ziemlich leicht löslich ist, erhält man das Reaktionsprodukt in reinerer Form als goldgelbe   Kristallchen,   welche bei 3600 noch nicht schmelzen. 



   Die Verbindung ist sehr schwer löslich in Benzol, Alkohol, Äther und Azeton, unlöslich in Alkalien, löslich in konzentrierter Schwefelsäure mit schöner bläulich roter Farbe. 
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 wird mit 4 Teilen Kalihydrat und 4 Teilen Alkohol eine Stunde auf   160-1700 C erhitzt.   Die Schmelze wird in Wasser gegossen, man kocht 1/2-1 Stunde und filtriert das Reaktionsprodukt ab. 



   Zu dem gleichen Resultat gelangt man auch, wenn man statt Kalihydrat und Alkohol,   Kalkmilch   verwendet. Die Reaktion wird in geschlossenem Gefäss bei Temperaturen von 170-200  C ausgeführt. Der überschüssige Kalk wird zum Schluss durch verdünnte Salzsäure entfernt. 



   An Stelle   von #-Dichlor-ss-methylanthrachinon kann   man auch das   Monochlorderhat   hezw. Gemische beider, sowie die entsprechenden Bromderivate anwenden. Besonders   Ipicht   reagiert hiebei das   M-Monobrom--methylanthraehinon.   Auch ist es nicht notwendig, 
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   eine   Stunde auf 170-180  C erhitzen. In   allen Fällen entsteht   ein und dasselbe Endprodukt.   Beispiel III. l   Teil   -Methylanthracbinon, 1'5   Teile   Bleioxyd   werden einige Stunden 
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 Reaktionsprodukt in reiner Form entweder durch Extrahieren mit alkalischer   Ilydrosul1it-     tusung oder   mittels Nitrobenzol, Anilin, Pyridin usw. in der Wärme. 



   An Stelle von Bleioxyd lassen sich auch andere Oxyde, wie   Kupferoxyd, Barium-     superoxyd   usw. verwenden. 
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   You can also conveniently the reaction mass from the outset an oxidizing agent such. B. add saltpetre, potassium chlorate etc; in this case the temperature need not be increased above 140-1500C. By recrystallization from nitrobenzene, in which it is fairly easily soluble in the heat, the reaction product is obtained in a purer form than golden yellow crystals which do not yet melt at 3600.



   The compound is very sparingly soluble in benzene, alcohol, ether and acetone, insoluble in alkalis, soluble in concentrated sulfuric acid with a beautiful bluish red color.
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 is heated to 160-1700 C for one hour with 4 parts of potassium hydrate and 4 parts of alcohol. The melt is poured into water, boiled for 1 / 2-1 hour and the reaction product is filtered off.



   The same result can be obtained if one uses lime milk instead of potassium hydrate and alcohol. The reaction is carried out in a closed vessel at temperatures of 170-200 C. The excess lime is then removed using dilute hydrochloric acid.



   Instead of # -dichloro-ss-methylanthraquinone, one can also use the monochlorine hezw. Use mixtures of both and the corresponding bromine derivatives. M-monobromo-methylanthraehinone reacts particularly quickly. It is also not necessary
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   Heat to 170-180 C for one hour. In all cases one and the same end product is created. Example III. 1 part -Methylanthracbinon, 1'5 parts lead oxide are a few hours
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 Reaction product in pure form either by extracting with alkaline Ilydrosul1it- tusung or by means of nitrobenzene, aniline, pyridine, etc. in the heat.



   Instead of lead oxide, other oxides such as copper oxide, barium superoxide, etc. can also be used.
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AT26616D 1905-06-17 1905-06-17 Process for the preparation of a yellow anthracene dye. AT26616B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT26616T 1905-06-17

Publications (1)

Publication Number Publication Date
AT26616B true AT26616B (en) 1906-12-10

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ID=3538273

Family Applications (1)

Application Number Title Priority Date Filing Date
AT26616D AT26616B (en) 1905-06-17 1905-06-17 Process for the preparation of a yellow anthracene dye.

Country Status (1)

Country Link
AT (1) AT26616B (en)

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