JPS55141450A - Recovery of n-alkylamides - Google Patents
Recovery of n-alkylamidesInfo
- Publication number
- JPS55141450A JPS55141450A JP4971179A JP4971179A JPS55141450A JP S55141450 A JPS55141450 A JP S55141450A JP 4971179 A JP4971179 A JP 4971179A JP 4971179 A JP4971179 A JP 4971179A JP S55141450 A JPS55141450 A JP S55141450A
- Authority
- JP
- Japan
- Prior art keywords
- alkylamides
- recovery
- wash water
- aqueous solution
- solution containing
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pyrrole Compounds (AREA)
Abstract
PURPOSE: To extract and recover an N-alkylamide from an aqueous solution containing the amide, in high efficiency, by using a specific extraction solvent.
CONSTITUTION: N-Alkylamides (e.g. DMA, NMP, 1,3-dimethyl-2-imidazolidinone) are recovered from an aqueous solution containing the amides, by extracting with an extraction solvent selected from pyrrole, anilines, 1-pentanol, cyclohexanol, 3- chloropropionitrile, and phenols. The volume ratio of the solvent to the solution is 0.05W5 to 1. Useful for the recovery of N-alkylamides from a large amount of wash water used for the separation of an aromatic polyamide from its solution. The process can be applied effectively even if the wash water contains LiCl or CaCl2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4971179A JPS55141450A (en) | 1979-04-24 | 1979-04-24 | Recovery of n-alkylamides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4971179A JPS55141450A (en) | 1979-04-24 | 1979-04-24 | Recovery of n-alkylamides |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55141450A true JPS55141450A (en) | 1980-11-05 |
Family
ID=12838764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4971179A Pending JPS55141450A (en) | 1979-04-24 | 1979-04-24 | Recovery of n-alkylamides |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55141450A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62145061A (en) * | 1985-12-20 | 1987-06-29 | Toyo Soda Mfg Co Ltd | Purification of n-methyl-2-pyrrolidone |
JP2005330186A (en) * | 2004-05-18 | 2005-12-02 | Sumitomo Chemical Co Ltd | Method for recovering 1,3-dimethyl-2-imidazolidinone |
CN111097191A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Method for recovering organic solvent by extraction-rectification method |
CN111100028A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Extraction-rectification recovery method of N, N-dimethylformamide |
CN111100055A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Extraction-rectification recovery method of N-methyl pyrrolidone in waste solvent |
EP4306508A1 (en) * | 2022-07-14 | 2024-01-17 | BASF Agro B.V. | Improved process for recovering n,n-dimethylformamide (dmf) from an aqueous process stream |
-
1979
- 1979-04-24 JP JP4971179A patent/JPS55141450A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62145061A (en) * | 1985-12-20 | 1987-06-29 | Toyo Soda Mfg Co Ltd | Purification of n-methyl-2-pyrrolidone |
JP2005330186A (en) * | 2004-05-18 | 2005-12-02 | Sumitomo Chemical Co Ltd | Method for recovering 1,3-dimethyl-2-imidazolidinone |
JP4586414B2 (en) * | 2004-05-18 | 2010-11-24 | 住友化学株式会社 | Method for recovering 1,3-dimethyl-2-imidazolidinone |
CN111097191A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Method for recovering organic solvent by extraction-rectification method |
CN111100028A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Extraction-rectification recovery method of N, N-dimethylformamide |
CN111100055A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Extraction-rectification recovery method of N-methyl pyrrolidone in waste solvent |
CN111100028B (en) * | 2018-10-25 | 2023-11-28 | 中国石油化工股份有限公司 | Extraction-rectification recovery method of N, N-dimethylformamide |
EP4306508A1 (en) * | 2022-07-14 | 2024-01-17 | BASF Agro B.V. | Improved process for recovering n,n-dimethylformamide (dmf) from an aqueous process stream |
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