CH148348A - 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
- CH148348A CH148348A CH148348DA CH148348A CH 148348 A CH148348 A CH 148348A CH 148348D A CH148348D A CH 148348DA CH 148348 A CH148348 A CH 148348A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxy
- carboxylic acid
- phenylarylamine
- preparation
- acid
- Prior art date
Links
Description
Verfahren zur Darstellung einer m-Ogy-phenylarylamincarbonsäure. Vorliegendes Patent bezieht sich auf ein zur Herstellung einer m-Oxy-phenylarylamin- oarbonsäure, dadurch gekennzeichnet, dass man ein Alkalisalz von 3-Oxy-2'-methyldiphenyl- amin mit Kohlensäure unter Druck erhitzt.
Die 3-Oxy-2'-methyldiphenylamincarbon- säure ist ein weisses Pulver, das nach dem Umkristallisieren aus Eisessig den Schmelz punkt 180-182" C zeigt. Ihre alkoholische Lösung gibt mit verdünnter Eisenchloridlösung eine intensive, violette Färbung. Das Produkt soll als Zwischenprodukt zur Herstellung von Farbstoffen verwendet werden.
Beispiel: 995 Teile 3-Oxy-2'-methyldiphenylamin werden mit 334 Teilen Ätzkali 83,8 % ig und 1500 Teilen Wasser in einem mit Rührwerk versehenen Autoklaven in Lösung gebracht und das Wasser im Vakuum bis zur völligen Trockenheit des gebildeten Kaliumsalzes ab destilliert.
Nach dem Erkalten der Reaktions masse leitet man Kohlensäure bis zu einem Druck von 10 Atmosphären ein und erhitzt auf 170 0 C während 16 Stunden. Die erkaltete Schmelze wird in heissem Wasser gelöst, filtriert und die gebildete Carbonsäure mit mit Salzsäure gefällt. Zur weiteren Reinigung kann dieselbe aus Soda oder Natriumacetat umgelöst werden.
Process for the preparation of a m-Ogy-phenylarylamine carboxylic acid. The present patent relates to a method for producing an m-oxy-phenylarylamino-carboxylic acid, characterized in that an alkali metal salt of 3-oxy-2'-methyldiphenylamine is heated with carbonic acid under pressure.
The 3-oxy-2'-methyldiphenylamine carboxylic acid is a white powder which, after recrystallization from glacial acetic acid, has a melting point of 180-182 ° C. Its alcoholic solution gives an intense, violet color with dilute ferric chloride solution. The product is said to be an intermediate used to make dyes.
Example: 995 parts of 3-oxy-2'-methyldiphenylamine are dissolved with 334 parts of 83.8% caustic potash and 1500 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 introduced up to a pressure of 10 atmospheres and the mixture is heated to 170 ° 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, it can be redissolved from soda or sodium acetate.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE148348X | 1928-12-01 | ||
CH146551T | 1929-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH148348A true CH148348A (en) | 1931-07-15 |
Family
ID=25714885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148348D CH148348A (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) | CH148348A (en) |
-
1929
- 1929-11-13 CH CH148348D patent/CH148348A/en unknown
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