CH148353A - 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
CH148353A
CH148353A CH148353DA CH148353A CH 148353 A CH148353 A CH 148353A CH 148353D A CH148353D A CH 148353DA CH 148353 A CH148353 A CH 148353A
Authority
CH
Switzerland
Prior art keywords
oxy
carboxylic acid
preparation
phenylarylamine
acid
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 CH148353A publication Critical patent/CH148353A/en

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Description

  

      Verfahren   <B>zur</B>     1larstenung    einer.     m-Vgy-pnenylarytamlnearaonsaure.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung einer     m-Oxy-          phenylarylamincarbonsäure,    dadurch gekenn  zeichnet, dass man ein     Alkalisalz    von     3-Oxy-          3'        4'-dichlordiphenylamin    mit Kohlensäure  unter Druck erhitzt.  



  Die     3-Oxy-3'        4'-dichlordiphenylamincar-          bonsäure    ist ein     rötlichbraunes    Pulver, das  nach dem     Umkristallisieren    aus     o-Diehlor-          benzol    den Schmelzpunkt 203   C zeigt. Ihre  alkoholische Lösung gibt mit verdünnter       Eisenchloridlösung    eine violette Färbung.  Das Produkt soll als Zwischenprodukt zur  Herstellung von Farbstoffen verwendet wer  den.  



  <I>Beispiel:</I>  765 Teile     3-Oxy-3'        4'-dichlordiphenyl-          amin    werden mit 124,8 Teilen     Ätznatron     96%ig und 1000 Teilen Wasser in einem  mit Rührwerk versehenen     Autoklaven    in Lö  sung gebracht und das Wasser im Vakuum  bis zur völligen Trockenheit des gebildeten       Natriumsalzes        abdestilliert.    Nach dem Er  kalten der Reaktionsmasse leitet man Kohlen-    säure bis zu einem Druck von 10     Atm,    ein  und erhitzt auf<B>170'</B> 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 aus Soda oder       Natriumacetat    umgelöst werden.



      Procedure <B> for </B> 1solving a. m-Vgy-pnenylarytamlnearaonic 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-3'4'-dichlorodiphenylamine is heated with carbonic acid under pressure.



  The 3-oxy-3 '4'-dichlorodiphenylaminecarboxylic acid is a reddish brown powder which, after recrystallization from o-diehlorbenzene, has a melting point of 203 ° C. Your alcoholic solution gives a purple 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> 765 parts of 3-oxy-3'4'-dichlorodiphenylamine are dissolved with 124.8 parts of 96% caustic soda and 1000 parts of water in an autoclave equipped with a stirrer, and the water distilled off in vacuo until the sodium salt formed is completely dry. After the reaction mass has cooled down, carbonic acid is introduced up to a pressure of 10 atm and heated to <B> 170 '</B> 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 made up of 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'-dichlordiphenylamin m:t Kohlensäure unter Druck erhitzt. Die 3-Oxy-3' 4'-dichlordiphenylaminear- bonsäure ist ein rötlichbraunes Pulver, das nach dem Umkristallisieren aus o-Dichlor- benzol den Schmelzpunkt 203 C zeigt. PATENT CLAIM: A process for the production of an m-oxyphenylarylamine carboxylic acid, characterized in that an alkali salt of 3-oxy 3 '4'-dichlorodiphenylamine m: t carbonic acid is heated under pressure. The 3-oxy-3 '4'-dichlorodiphenylaminearboxylic acid is a reddish brown powder which, after recrystallization from o-dichlorobenzene, has a melting point of 203 ° C. Ihre alkoholische Lösung gibt mit verdünnter Eisenchloridlösung eine violette Färbung. Your alcoholic solution gives a purple color with a dilute ferric chloride solution.
CH148353D 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. CH148353A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148353X 1928-12-01
CH146551T 1929-11-13

Publications (1)

Publication Number Publication Date
CH148353A true CH148353A (en) 1931-07-15

Family

ID=25714890

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148353D CH148353A (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) CH148353A (en)

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