GB932827A - Improvements in or relating to the manufacture of dimethylformamide - Google Patents
Improvements in or relating to the manufacture of dimethylformamideInfo
- Publication number
- GB932827A GB932827A GB2077861A GB2077861A GB932827A GB 932827 A GB932827 A GB 932827A GB 2077861 A GB2077861 A GB 2077861A GB 2077861 A GB2077861 A GB 2077861A GB 932827 A GB932827 A GB 932827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dimethylamine
- sulphate
- dimethylformamide
- water
- calcium formate
- 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
Dimethylformamide is produced by mixing calcium formate with an aqueous solution of dimethylamine sulphate, removing the calcium sulphate formed, and heating to distil off the water and cause amide formation. The reactants are preferably mixed in stoichiometrically equivalent quantities, the dimethylamine sulphate being obtained by absorbing dimethylamine in dilute sulphuric acid. The product is recovered mainly from the distillation residue, but also from the aqueous distillate. The amount of water in the system may be from 200 to 300 grams per gram molecule of calcium formate used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2077861A GB932827A (en) | 1961-06-08 | 1961-06-08 | Improvements in or relating to the manufacture of dimethylformamide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2077861A GB932827A (en) | 1961-06-08 | 1961-06-08 | Improvements in or relating to the manufacture of dimethylformamide |
Publications (1)
Publication Number | Publication Date |
---|---|
GB932827A true GB932827A (en) | 1963-07-31 |
Family
ID=10151534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2077861A Expired GB932827A (en) | 1961-06-08 | 1961-06-08 | Improvements in or relating to the manufacture of dimethylformamide |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB932827A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3467580A (en) * | 1965-08-12 | 1969-09-16 | Raffinage Cie Franc De | Alkylamide-water distillation and amine neutralization of acid formed |
CN105936624A (en) * | 2016-04-28 | 2016-09-14 | 徐真华 | Method for crystallizing dimethylamine sulfate |
-
1961
- 1961-06-08 GB GB2077861A patent/GB932827A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3467580A (en) * | 1965-08-12 | 1969-09-16 | Raffinage Cie Franc De | Alkylamide-water distillation and amine neutralization of acid formed |
CN105936624A (en) * | 2016-04-28 | 2016-09-14 | 徐真华 | Method for crystallizing dimethylamine sulfate |
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