CH148355A - 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
CH148355A
CH148355A CH148355DA CH148355A CH 148355 A CH148355 A CH 148355A CH 148355D A CH148355D A CH 148355DA CH 148355 A CH148355 A CH 148355A
Authority
CH
Switzerland
Prior art keywords
oxy
carboxylic acid
preparation
dichloro
phenylarylamine
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 CH148355A publication Critical patent/CH148355A/en

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Description

  

  Verfahren zur Darstellung einer     m-Ogy-phenylarylaminearbonsäure.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung einer     m-Oxy-          phenylaiylamincarbonsäure,    dadurch gekenn  zeichnet, dass man ein     Alkalisalz    von     3-Oxy-          :3'        4'-dichlor-6'-methyldiphenylamin        mit    Koh  lensäure unter Druck erhitzt.  



  Die     3-Oxy-3'        4'-dichlor-6'-methyl-diphe-          nv        lamincarbonsäure    ist ein rotbraunes Pul  ver, das nach dem     Umkristallisieren    aus Eis  essig den Schmelzpunkt<B>203'</B> C zeigt. Ihre  alkoholische Lösung gibt mit verdünnter       Eisenchloridlösung    eine intensive kirschrote  Färbung. Das Produkt soll als Zwischenpro  dukt zur Herstellung von Farbstoffen ver  wendet werden.  



  <I>Beispiel:</I>  536 Teile     3-Oxy-3'        4'-dichlor-6'-methyldi-          phenylamin    werden mit     133,6    Teilen     Itzkali     83,8 %     ig    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   C während 16 Stunden.

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



  Process for the preparation of a m-Ogy-phenylarylaminearboxylic acid. The present patent relates to a process for the preparation of an m-oxyphenylaiylamine carboxylic acid, characterized in that an alkali salt of 3-oxy-: 3'4'-dichloro-6'-methyldiphenylamine is heated with carbonic acid under pressure.



  3-Oxy-3 '4'-dichloro-6'-methyl-diphenylamine carboxylic acid is a red-brown powder which, after recrystallization from glacial acetic acid, has a melting point of <B> 203' </B> C. 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 product in the manufacture of dyes.



  <I> Example: </I> 536 parts of 3-oxy-3 '4'-dichloro-6'-methyldiphenylamine are mixed with 133.6 parts of 83.8% Itzkali and 2000 parts of water in an autoclave equipped with a stirrer brought into solution and the water was distilled off in vacuo until the potassium salt formed was completely dry. After the reaction mass has cooled, carbonic acid is passed up to a pressure of 10 atm. and heated to 170 C for 16 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 dissolved in soda or sodium acetate.

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung einer m-Oxy- phenylarylamincarbonsäure, dadurch gekenn zeichnet, dass man ein Alkalisalz von 3-Oxy- 3' 4'-dichlor-6'-methyldiphenylamin mit Koh lensäure unter Druck erhitzt. Die 3-Oxy-3' 4'-dichlor-6'-methyl-diphe- nylamincarbonsäure ist ein rotbraunes Pul ver, das nach dem Umkristallisieren aus Eis essig den Schmelzpunkt 203 C zeigt. PATENT CLAIM A process for the production of an m-oxyphenylarylamine carboxylic acid, characterized in that an alkali metal salt of 3-oxy-3 '4'-dichloro-6'-methyldiphenylamine is heated under pressure with carbon acid. The 3-oxy-3 '4'-dichloro-6'-methyl-diphenylamine carboxylic acid is a red-brown powder which, after recrystallization from glacial acetic acid, has a melting point of 203 ° C. Ihre alkoholische Lösung gibt mit verdünnter Eisenchloridlösung e;ne intensive kirschrote Färbung. Your alcoholic solution gives an intense cherry-red color with a dilute ferric chloride solution.
CH148355D 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. CH148355A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148355X 1928-12-01
CH146551T 1929-11-13

Publications (1)

Publication Number Publication Date
CH148355A true CH148355A (en) 1931-07-15

Family

ID=25714892

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148355D CH148355A (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) CH148355A (en)

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