GB422139A - Improvements in the manufacture and production of trimethylamine - Google Patents
Improvements in the manufacture and production of trimethylamineInfo
- Publication number
- GB422139A GB422139A GB1940433A GB1940433A GB422139A GB 422139 A GB422139 A GB 422139A GB 1940433 A GB1940433 A GB 1940433A GB 1940433 A GB1940433 A GB 1940433A GB 422139 A GB422139 A GB 422139A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonia
- substance
- trimethylamine
- azeotropic mixture
- distillation
- 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
Trimethylamine is separated from mixtures thereof with ammonia by distillation in the presence of a third substance which forms with ammonia an azeotropic mixture of lower boiling point than the azeotropic mixture of trimethylamine and ammonia, but does not form a ternary azeotropic mixture with trimethylamine and ammonia. Suitable substances are low-boiling aliphatic hydrocarbons and ethers. The distillation is preferably effected at a raised pressure, e.g. at the vapour pressure of the mixture at atmospheric temperature, but distillation may also be effected at atmospheric or reduced pressure. When the boiling point of the third substance differs considerably from that of trimethylamine, an excess of the third substance may be added, so that all the ammonia may be removed as azeotropic mixture and the excess of third substance then distilled off. When the boiling point of the third substance is close to that of trimethylamine, the amount of substance added is preferably rather less than is necessary to remove all the ammonia as azeotropic mixture, the remainder of the ammonia being removed as ammonia-trimethylamine mixture. Examples are given describing the distillation of ammoniatrimethylamine mixtures in the presence of n-butane, isobutane, and dimethyl ether; the use of n- or iso-butylene as the third substance is also mentioned. When dimethyl ether is used, the azeotropic mixture can be used, with or without addition of ammonia and methyl alcohol, for the catalytic manufacture of methylamines.ALSO:Trimethylamine is separated from mixtures thereof with ammonia by distillation in the presence of a third substance which forms with ammonia an azeotropic mixture of lower boiling point than the azeotropic mixture of trimethylamine and ammonia, but does not form a ternary azeotropic mixture with trimethylamine and ammonia. Suitable substances are low-boiling aliphatic hydrocarbons and ethers. The distillation is preferably effected at a raised pressure, e.g. at the vapour pressure of the mixture at atmospheric temperature, but distillation may also be effected at atmospheric or reduced pressure. When the boiling point of the third substance differs considerably from that of trimethylamine, an excess of the third substance may be added, so that all the ammonia may be removed as azeotropic mixture and the excess of third substance then distilled off. When the boiling point of the third substance is close to that of trimethylamine, the amount of substance added is preferably rather less than is necessary to remove all the ammonia as azeotropic mixture, the remainder of the ammonia being removed as ammoniatrimethylamine mixture. Examples are given describing the distillation of ammonia-trimethylamine mixtures in the presence of n-butane, isobutane, and dimethyl ether; the use of n-or iso-butylene as the third substance is also mentioned.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1940433A GB422139A (en) | 1933-07-08 | 1933-07-08 | Improvements in the manufacture and production of trimethylamine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1940433A GB422139A (en) | 1933-07-08 | 1933-07-08 | Improvements in the manufacture and production of trimethylamine |
Publications (1)
Publication Number | Publication Date |
---|---|
GB422139A true GB422139A (en) | 1935-01-07 |
Family
ID=10128783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1940433A Expired GB422139A (en) | 1933-07-08 | 1933-07-08 | Improvements in the manufacture and production of trimethylamine |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB422139A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2444175A (en) * | 1944-10-12 | 1948-06-29 | Sinclair Refining Co | Separation of ammonia and hydrocarbons from mixtures containing ammonia, propane, propylene, and higher boiling materials |
US2461010A (en) * | 1942-12-29 | 1949-02-08 | Sinclair Refining Co | Process for the recovery of ammonia |
-
1933
- 1933-07-08 GB GB1940433A patent/GB422139A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2461010A (en) * | 1942-12-29 | 1949-02-08 | Sinclair Refining Co | Process for the recovery of ammonia |
US2444175A (en) * | 1944-10-12 | 1948-06-29 | Sinclair Refining Co | Separation of ammonia and hydrocarbons from mixtures containing ammonia, propane, propylene, and higher boiling materials |
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