FI900106A - FOERFARANDE FOER FRAMSTAELLNING AV SYRAAMID. - Google Patents
FOERFARANDE FOER FRAMSTAELLNING AV SYRAAMID. Download PDFInfo
- Publication number
- FI900106A FI900106A FI900106A FI900106A FI900106A FI 900106 A FI900106 A FI 900106A FI 900106 A FI900106 A FI 900106A FI 900106 A FI900106 A FI 900106A FI 900106 A FI900106 A FI 900106A
- Authority
- FI
- Finland
- Prior art keywords
- ammonia
- ester
- reaction
- alcohol
- fed
- Prior art date
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a process for preparing an acid amide by its reaction between an ester of a corresponding acid and ammonia. The resulting amide is separated from the liquid reaction mixture by crystallization, and alcohol which arises in the reaction is recovered by evaporation. The essential aspect of the invention is that the mother liquor from the amide crystallization step, which mother liquor also contains ammonia left over from the reaction in addition to alcohol, is recirculated in order to be reunited with ester which is fed into the process, with the ammonia content in the mother liquor reacting with the ester, and that a part of the resulting ammonia-free solution is separated for recovering alcohol by means of evaporation at the same time as the remaining part of the solution is reacted with ammonia which is fed into the process. The evaporation residue from the alcohol recovery, which residue principally consists of ester which has been fed into the process, can be returned to the step for feeding in the ester, in associated with which it is used in the reaction with the ammonia. The process is particularly suitable for preparing oxamide from dimethyl oxalate for use as an artificial fertiliser, with the process also producing dry, ammonia-free methanol in addition to oxamide.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900106A FI84818C (en) | 1990-01-09 | 1990-01-09 | Process for the preparation of acid amide |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900106 | 1990-01-09 | ||
FI900106A FI84818C (en) | 1990-01-09 | 1990-01-09 | Process for the preparation of acid amide |
Publications (4)
Publication Number | Publication Date |
---|---|
FI900106A0 FI900106A0 (en) | 1990-01-09 |
FI900106A true FI900106A (en) | 1991-07-10 |
FI84818B FI84818B (en) | 1991-10-15 |
FI84818C FI84818C (en) | 1992-01-27 |
Family
ID=8529663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI900106A FI84818C (en) | 1990-01-09 | 1990-01-09 | Process for the preparation of acid amide |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI84818C (en) |
-
1990
- 1990-01-09 FI FI900106A patent/FI84818C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI84818B (en) | 1991-10-15 |
FI900106A0 (en) | 1990-01-09 |
FI84818C (en) | 1992-01-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed |
Owner name: KEMIRA OY |