GB532258A - Improvements in and relating to the manufacture of mono- and dimethyl formamides - Google Patents
Improvements in and relating to the manufacture of mono- and dimethyl formamidesInfo
- Publication number
- GB532258A GB532258A GB2101539A GB2101539A GB532258A GB 532258 A GB532258 A GB 532258A GB 2101539 A GB2101539 A GB 2101539A GB 2101539 A GB2101539 A GB 2101539A GB 532258 A GB532258 A GB 532258A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mono
- methylamines
- formamides
- mixture
- methyl
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C233/00—Carboxylic acid amides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
532,258. Mono- and dimethyl formamides. TYERMAN, W., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 19, 1939, No. 21015. Drawings to Specification. [Class 2 (iii)] Mono- and di-methyl formamides are made from a mixture containing mono-, di- and trimethylamines by heating the mixture with methyl formate in an amount less than that stoichiometrically equivalent to the mono- and di-methylamines. The invention is particularly applicable to the mixture of methylamines and residual ammonia obtained by reacting ammonia with methanol. The mixture is treated with methyl formate in amount insufficient to react with all the mono- and di-methylamines, and the resulting mono- and di-methyl formamides are separated out by cooling, while the unchanged methylamines and ammonia may be returned to the first stage of the process to reduce the formation of trimethylamine in this stage. An example and diagrammatic lay-out of plant is given. The process may be used as a step in the preparation of pure mono- and dimethylamines from mixtures of methylamines, the formamides being separated by distillation and converted into the pure methylamines by hydrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2101539A GB532258A (en) | 1939-07-19 | 1939-07-19 | Improvements in and relating to the manufacture of mono- and dimethyl formamides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2101539A GB532258A (en) | 1939-07-19 | 1939-07-19 | Improvements in and relating to the manufacture of mono- and dimethyl formamides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB532258A true GB532258A (en) | 1941-01-21 |
Family
ID=10155750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2101539A Expired GB532258A (en) | 1939-07-19 | 1939-07-19 | Improvements in and relating to the manufacture of mono- and dimethyl formamides |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB532258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2829088A (en) * | 1952-11-08 | 1958-04-01 | Glanzstoff Ag | Process of refining dimethylformamide |
-
1939
- 1939-07-19 GB GB2101539A patent/GB532258A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2829088A (en) * | 1952-11-08 | 1958-04-01 | Glanzstoff Ag | Process of refining dimethylformamide |
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