GB917945A - Improved process for the purification of pyrrolidone - Google Patents
Improved process for the purification of pyrrolidoneInfo
- Publication number
- GB917945A GB917945A GB12047/60A GB1204760A GB917945A GB 917945 A GB917945 A GB 917945A GB 12047/60 A GB12047/60 A GB 12047/60A GB 1204760 A GB1204760 A GB 1204760A GB 917945 A GB917945 A GB 917945A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyrrolidone
- weight
- crude
- parts
- purification
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
- C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/24—Oxygen or sulfur atoms
- C07D207/26—2-Pyrrolidones
- C07D207/263—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms
- C07D207/267—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to the ring nitrogen atom
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrrole Compounds (AREA)
Abstract
Polypyrrolidone is prepared from pyrrolidone which has been purified by distillation under reduced pressure, e.g. 0,1 to 10 mm. Hg., from phosphorus pentoxide. 0,2 to 20 parts by weight of P2O5 per 100 parts by weight of crude pyrrolidone may be used. The P2O5 may be used in an amount from 1,5 to 10 times the weight of water present in the crude pyrrolidone. The polymerization may be effected by the usual procedures, e.g. by adding sodium to the pyrrolidone and then an activator such as acetylpyrrolidone, or by first forming pure sodium or potassium pyrrolidone and using this as catalyst together with an activator.ALSO:Pyrrolidone is purified by distillation under reduced pressure, e.g. 0.1 to 10 mm. Hg., from phosphorus pentoxide. 0.2 to 20 parts by weight of P2O5 per 100 parts by weight of crude pyrrolidone may be used. The P2O5 may be used in an amount from 1.5 to 10 times the weight of water present in the crude pyrrolidone. Some water may be removed from the crude pyrrolidone before treatment with P2O5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12047/60A GB917945A (en) | 1960-04-05 | 1960-04-05 | Improved process for the purification of pyrrolidone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12047/60A GB917945A (en) | 1960-04-05 | 1960-04-05 | Improved process for the purification of pyrrolidone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB917945A true GB917945A (en) | 1963-02-13 |
Family
ID=9997478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12047/60A Expired GB917945A (en) | 1960-04-05 | 1960-04-05 | Improved process for the purification of pyrrolidone |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB917945A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354568A (en) * | 2021-06-28 | 2021-09-07 | 合肥中聚合臣电子材料有限公司 | Method for ultimate water removal of electronic-grade N-methyl pyrrolidone |
-
1960
- 1960-04-05 GB GB12047/60A patent/GB917945A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354568A (en) * | 2021-06-28 | 2021-09-07 | 合肥中聚合臣电子材料有限公司 | Method for ultimate water removal of electronic-grade N-methyl pyrrolidone |
| CN113354568B (en) * | 2021-06-28 | 2024-04-12 | 合肥中聚和成电子材料有限公司 | Method for limiting water removal of electronic grade nitrogen methyl pyrrolidone |
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