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.Info
- 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
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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)
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) |
-
1929
- 1929-11-13 CH CH148344D patent/CH148344A/en unknown
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