CH148349A - 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
CH148349A
CH148349A CH148349DA CH148349A CH 148349 A CH148349 A CH 148349A CH 148349D A CH148349D A CH 148349DA CH 148349 A CH148349 A CH 148349A
Authority
CH
Switzerland
Prior art keywords
oxy
acid
preparation
carboxylic 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 CH148349A publication Critical patent/CH148349A/en

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Description

  

  Verfahren zur Darstellung einer     m-0$y-pheuylarylaminearbonsäure.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung einer     rn-Oxy-phenyl-          ar-ylarninoarbonsäure,        dadurch    gekennzeichnet,       dah    man ein     Alkalisalz    von     3-Oxy-2'-chlor-          diphenylamin    mit     Kohlensäure    unter Druck  erhitzt.  



  Die     3-Oxy-2'-chlordiphenylarninearbonsäure     ist ein weisses Pulver, das nach dem Um  kristallisieren aus Eisessig den Schmelzpunkt  1980 C zeigt. Ihre alkoholische Lösung gibt  mit verdünnter     Eisenchloridlösung    eine inten  sive violette Färbung. Das Produkt soll als  Zwischenprodukt zur Herstellung von Farb  stoffen verwendet werden.  



  <I>Beispiel:</I>  895,3 Teile     3-Oxy-2'-chlordiphenylamin          werden        mit        300,6        Teilen        Ätzkali        83,8        %        ig     und     1.000    Teilen Wasser in einem mit Rühr  werk versehenen     Autokl.aven    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     Atrn.    ein und erhitzt.

    auf 1700 C während 16 Stunden. Die erkal  tete Schmelze wird in     heiUm    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 a m-0 $ y-pheuylarylaminearboxylic acid. The present patent relates to a process for the preparation of a rn-oxy-phenyl-ar-ylarninoarboxylic acid, characterized in that an alkali metal salt of 3-oxy-2'-chlorodiphenylamine is heated with carbonic acid under pressure.



  The 3-oxy-2'-chlorodiphenylarninearboxylic acid is a white powder which, after crystallizing from glacial acetic acid, has a melting point of 1980 ° C. Your alcoholic solution gives an intense violet 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> 895.3 parts of 3-oxy-2'-chlorodiphenylamine are dissolved with 300.6 parts of 83.8% caustic potash and 1,000 parts of water in an autoclave equipped with a stirrer and the water is 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 Atrn. one and heated.

    at 1700 C for 16 hours. The cooled melt is dissolved in hot water. filtered and the carboxylic acid formed precipitated with hydrochloric acid. For further cleaning, it can be redissolved from soda or sodium acetate.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer m-Oxy- phenylarylaminearbonsäure, dadurch gekenn zeichnet, dass man ein Alkalisalz von 3-Oxy- 2'-chlordiphenylamin mit Kohlensäure unter Druck erhitzt. Die 3-Oxy-2'-chlordipherrylaminearbonsäure ist ein weisses Pulver, das nach dem Um kristallisieren aus Eisessig den Schmelzpunkt 1980 C zeigt. Ihre alkoholische Lösung gibt mit verdünnter Eisenchloridlösung eine inten sive violette Färbung. PATENT CLAIM: Process for the production of an m-oxyphenylarylaminearboxylic acid, characterized in that an alkali metal salt of 3-oxy-2'-chlorodiphenylamine is heated with carbonic acid under pressure. The 3-oxy-2'-chlordipherrylaminearboxylic acid is a white powder which, after crystallizing from glacial acetic acid, has a melting point of 1980 ° C. Your alcoholic solution gives an intense violet color with a dilute ferric chloride solution.
CH148349D 1928-12-01 1929-11-13 Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. CH148349A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148349X 1928-12-01
CH146551T 1929-11-13

Publications (1)

Publication Number Publication Date
CH148349A true CH148349A (en) 1931-07-15

Family

ID=25714886

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148349D CH148349A (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) CH148349A (en)

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