GB1398501A - Purification of 2-pyrrolidone - Google Patents
Purification of 2-pyrrolidoneInfo
- Publication number
- GB1398501A GB1398501A GB461173A GB461173A GB1398501A GB 1398501 A GB1398501 A GB 1398501A GB 461173 A GB461173 A GB 461173A GB 461173 A GB461173 A GB 461173A GB 1398501 A GB1398501 A GB 1398501A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyrrolidone
- commercial
- metal hydroxide
- solution
- impurities
- 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
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 title abstract 12
- 238000000746 purification Methods 0.000 title abstract 2
- 239000012535 impurity Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 3
- 229910000000 metal hydroxide Inorganic materials 0.000 abstract 2
- 150000004692 metal hydroxides Chemical class 0.000 abstract 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 239000011552 falling film Substances 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 238000005292 vacuum distillation Methods 0.000 abstract 1
- 238000010792 warming Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/16—Separation or purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrrole Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22427472A | 1972-02-07 | 1972-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1398501A true GB1398501A (en) | 1975-06-25 |
Family
ID=22839968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB461173A Expired GB1398501A (en) | 1972-02-07 | 1973-01-30 | Purification of 2-pyrrolidone |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5212711B2 (enExample) |
| CA (1) | CA999252A (enExample) |
| FR (1) | FR2171258B1 (enExample) |
| GB (1) | GB1398501A (enExample) |
| IT (1) | IT977223B (enExample) |
| NL (1) | NL7301652A (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276215A (en) * | 1977-07-25 | 1981-06-30 | Gaf Corporation | Purification of pyrrolidone |
-
1973
- 1973-01-24 CA CA161,972A patent/CA999252A/en not_active Expired
- 1973-01-30 GB GB461173A patent/GB1398501A/en not_active Expired
- 1973-02-01 JP JP1361773A patent/JPS5212711B2/ja not_active Expired
- 1973-02-06 IT IT4808773A patent/IT977223B/it active
- 1973-02-06 NL NL7301652A patent/NL7301652A/xx not_active Application Discontinuation
- 1973-02-07 FR FR7304340A patent/FR2171258B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276215A (en) * | 1977-07-25 | 1981-06-30 | Gaf Corporation | Purification of pyrrolidone |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4891062A (enExample) | 1973-11-27 |
| IT977223B (it) | 1974-09-10 |
| NL7301652A (enExample) | 1973-08-09 |
| DE2305921A1 (de) | 1973-08-16 |
| FR2171258B1 (enExample) | 1980-08-08 |
| DE2305921B2 (de) | 1975-10-23 |
| JPS5212711B2 (enExample) | 1977-04-08 |
| FR2171258A1 (enExample) | 1973-09-21 |
| CA999252A (en) | 1976-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |