JPS5212711B2 - - Google Patents
Info
- Publication number
- JPS5212711B2 JPS5212711B2 JP1361773A JP1361773A JPS5212711B2 JP S5212711 B2 JPS5212711 B2 JP S5212711B2 JP 1361773 A JP1361773 A JP 1361773A JP 1361773 A JP1361773 A JP 1361773A JP S5212711 B2 JPS5212711 B2 JP S5212711B2
- Authority
- JP
- Japan
- 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
- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/16—Separation or purification
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22427472A | 1972-02-07 | 1972-02-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4891062A JPS4891062A (xx) | 1973-11-27 |
| JPS5212711B2 true JPS5212711B2 (xx) | 1977-04-08 |
Family
ID=22839968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1361773A Expired JPS5212711B2 (xx) | 1972-02-07 | 1973-02-01 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5212711B2 (xx) |
| CA (1) | CA999252A (xx) |
| FR (1) | FR2171258B1 (xx) |
| GB (1) | GB1398501A (xx) |
| IT (1) | IT977223B (xx) |
| NL (1) | NL7301652A (xx) |
Families Citing this family (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 NL NL7301652A patent/NL7301652A/xx not_active Application Discontinuation
- 1973-02-06 IT IT4808773A patent/IT977223B/it active
- 1973-02-07 FR FR7304340A patent/FR2171258B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1398501A (en) | 1975-06-25 |
| FR2171258A1 (xx) | 1973-09-21 |
| FR2171258B1 (xx) | 1980-08-08 |
| IT977223B (it) | 1974-09-10 |
| DE2305921A1 (de) | 1973-08-16 |
| JPS4891062A (xx) | 1973-11-27 |
| CA999252A (en) | 1976-11-02 |
| DE2305921B2 (de) | 1975-10-23 |
| NL7301652A (xx) | 1973-08-09 |