GB1247062A - Production of n,n-dimethylacylamides - Google Patents
Production of n,n-dimethylacylamidesInfo
- Publication number
- GB1247062A GB1247062A GB641269A GB641269A GB1247062A GB 1247062 A GB1247062 A GB 1247062A GB 641269 A GB641269 A GB 641269A GB 641269 A GB641269 A GB 641269A GB 1247062 A GB1247062 A GB 1247062A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- dimethylacylamides
- carboxylic acid
- mixture
- dimethylacylamide
- 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
1,247,062. N-Dimethylacylamides. BADISCHE ANILIN- & SODA-FABRIK A.G. 6 Feb., 1969 [7 Feb., 1968], No. 6412/69. Heading C2C. N,N-Dimethylacylamides containing C 2-4 acyl radicals are obtained by reacting an excess of dimethylamine and a C 2-4 aliphatio carboxylic acid at elevated temperature in a continuous manner on a column with distillation of the amide formed, wherein the amine and the acid in a molar ratio 1-1:1 to 5:1 are introduced at 80-220‹ C. and pressure of 0À1-2 atmospheres in the absence of a catalyst into a mixture of N,N-dimethylacylamide and its carboxylic acid, the acid content of the mixture corresponding at least to the amount of acid present in the azeotropic mixture of the N,N-dimethylacylamide and its carboxylic acid. The ratio of amine to acid is preferably 1À5:1 to 2:1, the temperature 160-210‹ C. and atmospheric pressure is advantageously employed. A column having 25-80 theoretical trays is preferred and the amide preferably withdrawn at a point 17-34 theoretical trays above the point at which the acid is fed in. In the example acetic acid is reacted with dimethylamine in a molar ratio of 1:1À7 at 201‹ C. under atmospheric pressure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681643752 DE1643752C3 (en) | 1968-02-07 | 1968-02-07 | Process for the preparation of pure N-dimethylacylamides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1247062A true GB1247062A (en) | 1971-09-22 |
Family
ID=5684390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB641269A Expired GB1247062A (en) | 1968-02-07 | 1969-02-06 | Production of n,n-dimethylacylamides |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE727931A (en) |
| FR (1) | FR2001464A1 (en) |
| GB (1) | GB1247062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112574052A (en) * | 2020-11-30 | 2021-03-30 | 安徽金禾实业股份有限公司 | Distillation treatment method of DMAC reaction solution |
| CN113856607A (en) * | 2021-10-21 | 2021-12-31 | 聊城鲁西甲胺化工有限公司 | DMAC (dimethyl acetamide) reaction device for thermal condensation of dimethylamine and acetic acid and application method thereof |
-
1969
- 1969-02-05 BE BE727931D patent/BE727931A/xx not_active IP Right Cessation
- 1969-02-06 FR FR6902706A patent/FR2001464A1/fr not_active Withdrawn
- 1969-02-06 GB GB641269A patent/GB1247062A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112574052A (en) * | 2020-11-30 | 2021-03-30 | 安徽金禾实业股份有限公司 | Distillation treatment method of DMAC reaction solution |
| CN113856607A (en) * | 2021-10-21 | 2021-12-31 | 聊城鲁西甲胺化工有限公司 | DMAC (dimethyl acetamide) reaction device for thermal condensation of dimethylamine and acetic acid and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2001464A1 (en) | 1969-09-26 |
| BE727931A (en) | 1969-08-05 |
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