BE656437A - - Google Patents
Info
- Publication number
- BE656437A BE656437A BE656437DA BE656437A BE 656437 A BE656437 A BE 656437A BE 656437D A BE656437D A BE 656437DA BE 656437 A BE656437 A BE 656437A
- Authority
- BE
- Belgium
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/24—Pyrrolidones or piperidones
-
- 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)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Pyrrole Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB74478A DE1295556B (de) | 1963-11-30 | 1963-11-30 | Verfahren zur Reinigung von Pyrrolidon-(2) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE656437A true BE656437A (de) | 1965-05-31 |
Family
ID=6978276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE656437D BE656437A (de) | 1963-11-30 | 1964-11-30 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3290329A (de) |
| BE (1) | BE656437A (de) |
| CH (1) | CH437291A (de) |
| DE (1) | DE1295556B (de) |
| GB (1) | GB1092630A (de) |
| NL (1) | NL6413828A (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014900A (en) * | 1972-02-07 | 1977-03-29 | Pusztaszeri Stephen F | Purification of 2-pyrrolidone |
| US4050994A (en) * | 1976-11-26 | 1977-09-27 | Chevron Research Company | Recovery of 2-pyrrolidone from dilute alkaline solutions |
| US4276215A (en) * | 1977-07-25 | 1981-06-30 | Gaf Corporation | Purification of pyrrolidone |
| NL8003365A (nl) * | 1980-06-10 | 1982-01-04 | Stamicarbon | Werkwijze voor het zuiveren van 2-pyrrolidon. |
| US4859781A (en) * | 1989-03-03 | 1989-08-22 | Phillips Petroleum Company | Recovery of N-methyl-2-pyrrolidone |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE624324A (de) * | ||||
| DE920073C (de) * | 1952-03-01 | 1954-11-11 | Bayer Ag | Verfahren zur Aufarbeitung des Destillationsrueckstandes von Lactamen |
| US2802777A (en) * | 1956-05-10 | 1957-08-13 | Gen Aniline & Film Corp | Process of purifying crude 2-pyrrolidone |
| DE1143814B (de) * | 1961-01-11 | 1963-02-21 | Minnesota Mining & Mfg | Verfahren zur Reinigung von 2-Pyrrolidon |
-
1963
- 1963-11-30 DE DEB74478A patent/DE1295556B/de active Pending
-
1964
- 1964-11-25 US US413985A patent/US3290329A/en not_active Expired - Lifetime
- 1964-11-26 CH CH1527464A patent/CH437291A/de unknown
- 1964-11-27 NL NL6413828A patent/NL6413828A/xx unknown
- 1964-11-27 GB GB48230/64A patent/GB1092630A/en not_active Expired
- 1964-11-30 BE BE656437D patent/BE656437A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1295556B (de) | 1969-05-22 |
| US3290329A (en) | 1966-12-06 |
| CH437291A (de) | 1967-06-15 |
| NL6413828A (de) | 1965-05-31 |
| GB1092630A (en) | 1967-11-29 |