CH148344A - 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
CH148344A
CH148344A CH148344DA CH148344A CH 148344 A CH148344 A CH 148344A CH 148344D A CH148344D A CH 148344DA CH 148344 A CH148344 A CH 148344A
Authority
CH
Switzerland
Prior art keywords
oxy
carboxylic acid
preparation
acid
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 CH148344A publication Critical patent/CH148344A/en

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Description

  

  Verfahren zur     Darstellung    einer     m- xy-phenylai-ylaminearbonsäure.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung einer     m-Oxyphenyl-          arylarniricarbonsäure,    dadurch gekennzeichnet  dass man ein     Alkalisalz    von     3-Oxy-4'-chlor-          dipbenylamin    mit Kohlensäure unter Druck  erhitzt.  



  Die     3-Oxy-4'-chlordiphenylamincarbonsäure     ist ein graues Pulver, das nach dem Um  kristallisieren aus Eisessig den Schmelzpunkt  188  C zeigt. Ihre alkoholische Lösung gibt  mit verdünnter     Eisenchloridlösung    eine. inten  sive kirschrote Färbung. Das Produkt soll  als Zwischenprodukt zur Herstellung von       Farbstoffen    verwendet werden.  



  <I>Beispiel:</I>  1320 Teile     3-Oxy-4'-chlordiphenylamin     werden mit 249,6 Teilen     Ätznatron    96     o/oig     und 2000 Teilen Wasser in einem mit Rühr  werk versehenen     Autoklaven    in Lösung ge  bracht und das Wasser im Vakuum bis zur  völligen Trockenheit des gebildeten Natrium  salzes     abdestilliert.    Nach dem Erkalten der    Reaktionsmasse leitet man     Kohlensäure    bis  zu einem Druck von 10     Atm.    ein und erhitzt  auf<B>170"</B> C während 16 Stunden.  



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



  Process for the preparation of a m-xy-phenylai-ylaminearboxylic acid. The present patent relates to a process for the preparation of an m-oxyphenyl-arylarniricarboxylic acid, characterized in that an alkali salt of 3-oxy-4'-chlorodipbenylamine is heated with carbonic acid under pressure.



  The 3-oxy-4'-chlorodiphenylamine carboxylic acid is a gray powder which, after crystallizing from glacial acetic acid, has a melting point of 188 ° C. Your alcoholic solution gives a with dilute ferric chloride solution. intense cherry red color. The product is intended to be used as an intermediate in the manufacture of dyes.



  <I> Example: </I> 1320 parts of 3-oxy-4'-chlorodiphenylamine are dissolved with 249.6 parts of caustic soda 96% and 2000 parts of water in an autoclave equipped with a stirrer and the water is brought into solution in vacuo Distilled off until the sodium salt formed is completely dry. After the reaction mass has cooled down, carbonic acid is passed up to a pressure of 10 atm. and heated to <B> 170 "</B> 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 made up of soda or sodium acetate.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer m-Oxy- phenylarylaminearbonsäure, dadurch gekenn zeichnet, dass man ein Alkalisalz von 3-Oxy- 4'-chlordiphenylamin mit Kohlensäure unter Druck erhitzt. Die 3-Oxy-4'-chlordiphenyl- amincarbonsäure ist. ein graues Pulver, das nach dem Umkristallisieren aus Eisessig den Schmelzpunkt 188(' zeigt. Ihre alkoholische Lösung gibt mit verdünnter Eisenchloridlösung eine intensive kirschrote Färbung. PATENT CLAIM: A process for the production of an m-oxyphenylarylaminearboxylic acid, characterized in that an alkali salt of 3-oxy-4'-chlorodiphenylamine is heated with carbonic acid under pressure. The 3-oxy-4'-chlorodiphenylamine carboxylic acid is. a gray powder which, after recrystallization from glacial acetic acid, has a melting point of 188 ('. Its alcoholic solution gives an intense cherry-red color with dilute ferric chloride solution.
CH148344D 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. CH148344A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148344X 1928-12-01
CH146551T 1929-11-13

Publications (1)

Publication Number Publication Date
CH148344A true CH148344A (en) 1931-07-15

Family

ID=25714881

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148344D CH148344A (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) CH148344A (en)

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