CH201513A - Process for the preparation of p-dodecylaniline. - Google Patents
Process for the preparation of p-dodecylaniline.Info
- Publication number
- CH201513A CH201513A CH201513DA CH201513A CH 201513 A CH201513 A CH 201513A CH 201513D A CH201513D A CH 201513DA CH 201513 A CH201513 A CH 201513A
- Authority
- CH
- Switzerland
- Prior art keywords
- dodecylaniline
- cobalt
- preparation
- wel chem
- added
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von p-Dodecylanilin. Im Patent Nr. 193617 ist ein Verfahren zur Herstellung einer neuen Verbindung, des p-Dodecylanilins durch Erhitzen von N- Dodecylanilin mit einem Zinkhalogenid, be schrieben.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Darstellung des p-Dode- cylanilins, welches dadurch gekennzeichnet ist, dass man N-Dodecylanilin mit einem Ko- balthalogenid erhitzt.
Das gobalthalogenid kann gobaltchlorid oder Kobaltbromid sein. Zwecks Erhöhung der Ausbeute kann auch Chlorwasserstoff säure oder Bromwasserstoffsäure oder das Anilinsalz derselben zugesetzt werden.
p-Dodecylanilin stellt ein wertvolles Farbstoffzwischenprodukt dar.
<I>Beispiel:</I> Ein Gemisch von 520 Teilen N-Dodecyl- anilin, 290 Teilen $obaltchloridkristallen (C0C12. 611,0) und 87 Teilen Anilinhydro- chlorid wird während 16 Stunden auf 240 C erhitzt, in welchem Zeitraum die feste Masse in Lösung übergeht.
Die Schmelze wird auf 180 bis 190 C gekühlt, in ein überschüssiges ;Quantum 10%iger Natriumhydroxydlösung gegossen und während einer Stunde gekocht, wodurch die Kobaltkomplexe sich zersetzen und das Roh-Dodecylanilin als ein Öl auf der wässerigen Suspension des Kobalt hydroxyds schwimmt. Das ,01 wird durch De kantieren und Filtrieren abgetrennt und ein noch im Rückstand auf dem Filter verblei bender Rest mit Benzol oder Äther extra hiert.
Das<B>01</B> wird durch Schütteln mit 10 Teilen einer 30 % igen warmen Natrium hydrogydflüssigkeit bei<B>50'</B> C getrocknet, abgetrennt und im Vakuum destilliert; der bei 200 bis 235 C und 11 mm Druck destil- lierende Teil wird gesammelt.
p-Dodecylanilin ist eine weisse, kristal linische Substanz, deren Zristallisations- Punkt bei 35 C und deren Siedepunkt bei 220 bis 221 C und 15 mm Druck liegen. Ihr Acetylderivat schmilzt bei 100 C.
Process for the preparation of p-dodecylaniline. In patent no. 193617 a process for the preparation of a new compound, p-dodecylaniline, by heating N-dodecylaniline with a zinc halide, is described.
The subject of the present patent is a process for the preparation of p-dodecylaniline, which is characterized in that N-dodecylaniline is heated with a cobalt halide.
The cobalt halide can be cobalt chloride or cobalt bromide. In order to increase the yield, hydrochloric acid or hydrobromic acid or the aniline salt thereof can also be added.
p-Dodecylaniline is a valuable intermediate dye product.
<I> Example: </I> A mixture of 520 parts of N-dodecyl aniline, 290 parts of sodium chloride crystals (COC12. 611.0) and 87 parts of aniline hydrochloride is heated to 240 ° C. for 16 hours, during which time the solid mass passes into solution.
The melt is cooled to 180 to 190 C, poured into an excess quantity of 10% sodium hydroxide solution and boiled for one hour, whereby the cobalt complexes decompose and the crude dodecylaniline floats as an oil on the aqueous suspension of the cobalt hydroxide. The 01 is separated off by decanting and filtering, and any residue still remaining on the filter is extracted with benzene or ether.
The <B> 01 </B> is dried by shaking with 10 parts of a 30% warm sodium hydrochloride liquid at <B> 50 '</B> C, separated off and distilled in vacuo; the part that distills at 200 to 235 C and 11 mm pressure is collected.
p-Dodecylaniline is a white, crystalline substance with a crystallization point of 35 C and a boiling point of 220 to 221 C and 15 mm pressure. Their acetyl derivative melts at 100 C.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201513X | 1935-12-31 | ||
CH193617T | 1936-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH201513A true CH201513A (en) | 1938-11-30 |
Family
ID=25722538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH201513D CH201513A (en) | 1935-12-31 | 1936-12-19 | Process for the preparation of p-dodecylaniline. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH201513A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0025934A1 (en) * | 1979-09-22 | 1981-04-01 | BASF Aktiengesellschaft | Process for the production of p-substituted aromatic amines |
-
1936
- 1936-12-19 CH CH201513D patent/CH201513A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0025934A1 (en) * | 1979-09-22 | 1981-04-01 | BASF Aktiengesellschaft | Process for the production of p-substituted aromatic amines |
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