GB273923A - Improvements in processes for preparing aromatic amines and derivatives thereof - Google Patents
Improvements in processes for preparing aromatic amines and derivatives thereofInfo
- Publication number
- GB273923A GB273923A GB2095626A GB2095626A GB273923A GB 273923 A GB273923 A GB 273923A GB 2095626 A GB2095626 A GB 2095626A GB 2095626 A GB2095626 A GB 2095626A GB 273923 A GB273923 A GB 273923A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amine
- aromatic amines
- monoalkyl
- added
- monoethylaniline
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
273,923. British Dyestuffs Corporation, Ltd., Everatt, R. W., and Rodd, E. H. Aug. 25, 1926. Amines. - Dialkyl aromatic amines are separated from admixed monoalkyl aromatic amines by treating the mixture with phosgene in the presence of water to convert the monoalkyl amine into urea chloride, an alkali being added to neutralize any amine hydrochlorides formed. which is only necessary when the proportion of monoalkyl amine is above 25-30 per cent. In examples, a mixture of mono- and di-ethylaniline is stirred with water, cooled, and phosgene is passed in, sodium hydroxide or carbonate being added slowly during the reaction or slaked lime being introduced at the start. Hydrochloric acid is then added to dissolve the diethylaniline and the phenylethylcarbamyl chloride is filtered off and may be hydrolyzed to monoethylaniline or it may be condensed with a primary or secondary amine (monoethylaniline) or with ammonia to form a substituted urea. Specifications 128,372 and 211,245 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2095626A GB273923A (en) | 1926-08-25 | 1926-08-25 | Improvements in processes for preparing aromatic amines and derivatives thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2095626A GB273923A (en) | 1926-08-25 | 1926-08-25 | Improvements in processes for preparing aromatic amines and derivatives thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB273923A true GB273923A (en) | 1927-07-14 |
Family
ID=10154668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2095626A Expired GB273923A (en) | 1926-08-25 | 1926-08-25 | Improvements in processes for preparing aromatic amines and derivatives thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB273923A (en) |
-
1926
- 1926-08-25 GB GB2095626A patent/GB273923A/en not_active Expired
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