CH148350A - 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
CH148350A
CH148350A CH148350DA CH148350A CH 148350 A CH148350 A CH 148350A CH 148350D A CH148350D A CH 148350DA CH 148350 A CH148350 A CH 148350A
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 CH148350A publication Critical patent/CH148350A/en

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Description

  

      Verfahren    zur Darstellung einer     m-Oxy-phenylarylamincarbonsäure.       Vorliegendes Patent bezieht sich auf ein  Verfahren     zurHerstellung        einerm-Oxy-phenyl-          arylamirrcarbonsäure,    dadurch     gekerinzeichuet,     dass man ein     Alkalisalz    von     3-Oxy-2'-meth-          oxydiphenylamin    mit Kohlensäure unter Druck  erhitzt.  



  Die     3-Oxy-2'-methoxydiphenylamincarbon-          säure    ist ein graubraunes Pulver, das nach  dem     Umkristallisieren    aus Chlorbenzol den  Schmelzpunkt 199-200 o C zeigt. Ihre alko  holische Lösung gibt mit verdünnter Eisen  chloridlösung eine violette Färbung. Das  Produkt soll als Zwischenprodukt zur Her  stellung von     Farbstoffen    verwendet werden.

    <I>Beispiel:</I>  430 Teile     3-Oxy-2'-methoxydiphenylamin     werden mit 133,6 Teilen     Ätzkali    83,8      /o        ig     und 1000 Teilen Wasser in einem mit Rühr  werk versehenen     Autoklaven    in Lösung ge  bracht und das Wasser im Vakuum bis zur  völligen Trockenheit des gebildeten Kalium  salzes     abdestilliert.    Nach dem Erkalten der  Reaktionsmasse leitet man Kohlensäure bis    zu einem     Druck    von 10     Atm.    ein und erhitzt  auf 160 o C während 16 Stunden. Die er  kaltete Schmelze wird in heissem Wasser  gelöst, filtriert und die gebildete     Carbonsäure     mit Salzsäure gefällt.

   Zur weiteren Reinigung  kann dieselbe aus Soda oder     Natriumacetat     umgelöst werden.



      Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. The present patent relates to a process for the preparation of an m-oxy-phenyl-arylamircarboxylic acid, characterized in that an alkali salt of 3-oxy-2'-methoxydiphenylamine is heated with carbonic acid under pressure.



  The 3-oxy-2'-methoxydiphenylamine carboxylic acid is a gray-brown powder which, after recrystallization from chlorobenzene, has a melting point of 199-200 ° C. Your alcoholic solution gives a purple color with a dilute iron chloride solution. The product is intended to be used as an intermediate in the manufacture of dyes.

    <I> Example: </I> 430 parts of 3-oxy-2'-methoxydiphenylamine are dissolved with 133.6 parts of 83.8% caustic potash and 1000 parts of water in an autoclave equipped with a stirrer, and the water is dissolved distilled off in vacuo until the potassium 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 160 o C for 16 hours. The cold melt is dissolved in hot water, filtered and the carboxylic acid formed is precipitated with hydrochloric acid.

   For further cleaning, it can be redissolved from soda or sodium acetate.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer rn-Oxy- phenylarylamincarbonsäure, dadurch gekenn zeichnet, dass man ein Alkalisalz von 3-Oxy- 2'-methoxydiphenylamirr mitKohlensäure unter Druck erhitzt. Die 3-Oxy-2'-methoxydiphenylamincarborr- säure ist ein graubraunes Pulver, das nach dem Umkristallisieren aus Chlorbenzol den Schmelzpunkt 199-2000 C zeigt. PATENT CLAIM: A process for the production of a rn-oxyphenylarylamine carboxylic acid, characterized in that an alkali salt of 3-oxy-2'-methoxydiphenylamine is heated with carbonic acid under pressure. The 3-oxy-2'-methoxydiphenylaminecarboric acid is a gray-brown powder which, after recrystallization from chlorobenzene, has a melting point of 199-2000 ° C. Ihre allzo- holische Lösung gibt mit verdünnter Eisen chloridlösung eine violette Färbung. Their allzoic solution gives a purple color with a dilute iron chloride solution.
CH148350D 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. CH148350A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148350X 1928-12-01
CH146551T 1929-11-13

Publications (1)

Publication Number Publication Date
CH148350A true CH148350A (en) 1931-07-15

Family

ID=25714887

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148350D CH148350A (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) CH148350A (en)

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