CH148352A - Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. - Google Patents

Process for the preparation of an m-oxy-phenylarylamine carboxylic acid.

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Publication number
CH148352A
CH148352A CH148352DA CH148352A CH 148352 A CH148352 A CH 148352A CH 148352D A CH148352D A CH 148352DA CH 148352 A CH148352 A CH 148352A
Authority
CH
Switzerland
Prior art keywords
oxy
carboxylic acid
preparation
phenylarylamine
dichlorodiphenylamine
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 CH148352A publication Critical patent/CH148352A/en

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

Description

  

      Verfahren    zur Darstellung einer     m-Oxy-phenylarylimincarbonsäure.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung einer     m-Oxy-          phenylarylamincarbonsäure,    dadurch gekenn  zeichnet, dass man ein     Alkalisalz    von     3-Oxy-          2'        4'-dichlordiphenylamin    mit Kohlensäure  unter Druck erhitzt.  



  Die     3-Oxy-2'        4'-dichlordiphenylamincar-          bonsäure    ist ein grauviolettes Pulver, das  nach dem     Umkristallisieren    aus Eisessig den       Schmelzpunkt    215   zeigt. Ihre alkoholische  Lösung     gibt    mit verdünnter Eisenchlorid  lösung eine     intensive    kirschrote Färbung.  Das Produkt soll als Zwischenprodukt zur  Herstellung von Farbstoffen verwendet wer  den.  



  <I>Beispiel:</I>  <B>19-75</B> Teile     3-Oxy-2'        4'-dichlordiphenyl-          amin    werden mit 334 Teilen     Ätzkali     83,8 %     i.g    und 2000 Teilen Wasser in einem  mit Rührwerk     versehenen        Autoklaven    in Lö  sung gebracht und das Wasser im Vakuum  bis zur völligen Trockenheit des gebildeten       Kaliumsalzes        abdestilliert.    Nach dem Er  kalten der Reaktionsmasse leitet man Kohlen-    säure bis zu einem Druck von 10     Atm.    ein  und erhitzt auf 170   während<B>16</B> Stunden.

    Die erkaltete Schmelze     wird    in heissem  Wasser gelöst, filtriert und die gebildete       Carbonsäure    mit Salzsäure gefällt. Zur wei  teren Reinigung kann dieselbe aus Soda oder       Natriumacetat    umgelöst werden.



      Process for the preparation of an m-oxy-phenylarylimine carboxylic acid. The present patent relates to a process for the preparation of an m-oxyphenylarylamine carboxylic acid, characterized in that an alkali metal salt of 3-oxy-2'4'-dichlorodiphenylamine is heated with carbonic acid under pressure.



  The 3-oxy-2 '4'-dichlorodiphenylamine carboxylic acid is a gray-violet powder that has a melting point of 215 after recrystallization from glacial acetic acid. Their alcoholic solution gives an intense cherry-red color with a dilute ferric chloride solution. The product is intended to be used as an intermediate in the manufacture of dyes.



  <I> Example: </I> <B> 19-75 </B> parts of 3-oxy-2'4'-dichlorodiphenylamine are combined with 334 parts of 83.8% caustic potash and 2000 parts of water in a mixer with a stirrer provided autoclave brought into solution and the water is distilled off in vacuo until the potassium salt formed is completely dry. After the reaction mass has cooled, carbonic acid is passed up to a pressure of 10 atm. on and heated to 170 for <B> 16 </B> hours.

    The cooled melt is dissolved in hot water, filtered and the carboxylic acid formed is precipitated with hydrochloric acid. For further cleaning, the same can be made up of soda or sodium acetate.

Claims (1)

PATENTANSPRUCE Verfahren zur Herstellung einer m-Oxy- phenylarylamincarbonsäure, dadurch gekenn zeichnet, dass man ein Alkalisalz von .3-Oxy- 2' 4'-dichlordiphenylamin mit Kohlensäure unter Druck erhitzt. Die 3-Oxy-2' 4'-dichlordiphenylamincar- bonsäure ist ein grauviolettes Pulver, das nach dem Umkristallisieren aus Eisessig den Schmelzpunkt 215 zeigt. PATENT CLAIM Process for the production of an m-oxyphenylarylamine carboxylic acid, characterized in that an alkali salt of .3-oxy-2 '4'-dichlorodiphenylamine is heated with carbonic acid under pressure. The 3-oxy-2 '4'-dichlorodiphenylamine carboxylic acid is a gray-violet powder that has a melting point of 215 after recrystallization from glacial acetic acid. Ihre alkoholische Lösung gibt mit verdünnter Eisenchlorid lösung e,*ne intensive kirschroto Färbun. Your alcoholic solution gives, with dilute ferric chloride solution, an intense cherry-red color.
CH148352D 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. CH148352A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148352X 1928-12-01
CH146551T 1929-11-13

Publications (1)

Publication Number Publication Date
CH148352A true CH148352A (en) 1931-07-15

Family

ID=25714889

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148352D CH148352A (en) 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid.

Country Status (1)

Country Link
CH (1) CH148352A (en)

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