| Patents for C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams (2,192) |
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| 12/16/1980 | US4239682 Basification, solvent extraction |
| 10/29/1980 | EP0018010A1 Process for the rapid cooling of gases containing vaporous caprolactam |
| 10/29/1980 | EP0017945A1 Process for the preparation of caprolactam |
| 10/28/1980 | CA1088530A1 Blocked isocyanate |
| 10/15/1980 | EP0017292A1 Process for the preparation of an optionally C-substituted 2-pyrrolidone |
| 09/16/1980 | CA1085836A1 PROCESS FOR RECOVERING .epsilon.-CAPROLACTAM FROM AN .epsilon.- CAPROLACTAM/SULPHURIC ACID REACTION MIXTURE |
| 09/02/1980 | CA1084919A1 PROCESS FOR THE RECOVERY OF .epsilon.-CAPROLACTAM FROM A REACTION MIXTURE OF .epsilon.-CAPROLACTAM AND SULPHURIC ACID |
| 08/05/1980 | US4216151 Process for the recovery of 2-pyrrolidone |
| 07/08/1980 | US4211700 Beckman rearrangement, raising acid index of sulfuric acid |
| 06/24/1980 | CA1080235A1 Process for producing 2-pyrrolidone |
| 06/24/1980 | CA1080222A1 Purification of caprolactam |
| 06/03/1980 | CA1078835A1 Production of caprolactam |
| 05/27/1980 | CA1078396A1 Process for preparing lower lactams from allylic substrates |
| 05/14/1980 | EP0010666A1 Process for the continuous manufacture of epsilon-caprolactam by the Beckmann conversion |
| 04/30/1980 | EP0010271A1 Crystallisation process for the purification of crude caprolactam |
| 04/30/1980 | EP0010245A1 Process for the production of epsilon-caprolactam by catalytic conversion of a cyclohexanone oxime |
| 03/19/1980 | EP0008716A1 Process for the preparation of epsilon-caprolactam |
| 03/18/1980 | US4193925 Hydrogenation of succinonitrile using a catalyst in a fixed bed |
| 02/05/1980 | US4187370 Polymerization and recovery of 2-pyrrolidone with acid treatment |
| 01/29/1980 | CA1070660A1 Abrasion resistant catalysts |
| 01/01/1980 | US4181662 2-Pyrrolidone production |
| 12/11/1979 | US4178287 Process for the purification of caprolactam by means of ozone |
| 12/11/1979 | US4178286 Bactericides |
| 11/20/1979 | CA1066700A1 Process for preparing lactams |
| 10/16/1979 | US4171305 Blocked isocyanate |
| 10/09/1979 | US4170592 Countercurrent solvent extraction |
| 09/04/1979 | CA1061792A1 Recovery of 2-pyrrolidone |
| 08/21/1979 | US4165328 Treatment with aqueous ammonia and benzene, toluene or xylene |
| 07/24/1979 | US4162325 N-substituted lactams |
| 06/19/1979 | CA1056826A1 Preparation of lactams and related intermediates and derivatives thereof |
| 06/13/1979 | EP0002300A1 Process for the recovery of 2-pyrrolidone |
| 06/12/1979 | US4157986 Abrasion resistant catalyst |
| 05/22/1979 | US4155876 Catalyst regeneration of boric acid on carbon catalysts |
| 05/15/1979 | US4154729 Benzene, water |
| 05/08/1979 | US4153600 Process for the recovery of ε-caprolactam from a distillation residue containing ε-caprolactam |
| 05/01/1979 | US4152331 From succinonitriles by hydrogenation and hydrolysis |
| 04/17/1979 | US4150024 Reaction products of epsilon-caprolactam with vicinal hydroxyalkylamines and alkoxylation products thereof |
| 04/17/1979 | CA1052784A1 Process for the preparation of lactams from corresponding oximes |
| 04/10/1979 | US4148793 Process for the purification of epsilon-caprolactam |
| 04/10/1979 | US4148792 Treating with potassium permanganate |
| 02/27/1979 | US4141896 Process for the producing ε-caprolactam from the distillation of cyclohexanone oxime |
| 02/20/1979 | US4140685 Process for recovering ε-caprolactam from an ε-caprolactam/sulfuric acid reaction mixture |
| 02/13/1979 | US4139696 Contacting dimer-containing 2-pyrrolidone with aqueous alkaline hydroxide, dehydrating, carbonating |
| 01/30/1979 | US4137263 Process for the evaporation of cyclohexanone oxime |
| 01/09/1979 | US4133810 Process for the recovery of ε-caprolactam from a reaction mixture of ε-caprolactam and sulfuric acid |
| 11/14/1978 | CA1042431A1 Catalytic process for imide-alcohol condensation |
| 09/19/1978 | CA1038869A1 Method for the production of omega lactams and their precursors by formation and nitrosation of the cyclomethylene ketene-so2 adduct and products obtained thereby |
| 09/12/1978 | CA1038384A1 Process for the purification of caprolactam |
| 09/05/1978 | US4111952 Process for preparing lower lactams from allylic amine substrates |
| 08/29/1978 | US4110340 Process for preparing lower lactams from allylic halide substrates |
| 08/29/1978 | US4110323 Conversion of 2-dialkylamino-3H-azepines into epsilon caprolactams |
| 08/22/1978 | US4108828 Polylactam composition containing hexaorgano distannane |
| 08/15/1978 | US4107160 Continuous process for the recovery of caprolactam |
| 03/28/1978 | US4081442 Process for the recovery of ε-caprolactam from a reaction mixture of ε-caprolactam and sulphuric acid |
| 02/07/1978 | US4072678 Process for producing caprolactam |
| 10/18/1977 | US4054562 Rearrangement of cycloalkanone-oxime with sulfuric acid or oleum |
| 09/27/1977 | US4050994 Recovery of 2-pyrrolidone from dilute alkaline solutions |
| 09/20/1977 | US4049646 Process for the manufacture of lactams |
| 08/16/1977 | US4042599 Hydrolysis, hydrogenation of succinonitrile, catalytic |
| 07/26/1977 | US4038198 Storage stable multicomponent mixtures useful in making aminoplasts, phenoplasts, and polyurethanes |
| 07/19/1977 | US4036836 Process for producing 2-pyrrolidone |
| 07/19/1977 | US4036830 Concentration, solvent extraction |
| 06/21/1977 | US4031139 Manufacture of cyclohexanone oxime |
| 06/07/1977 | US4028347 Distillation in the presence of a polyhydric alcohol |
| 05/03/1977 | US4021422 Treatment with ammonia |
| 04/12/1977 | US4017482 Method of purifying caprolactam |
| 03/29/1977 | US4014900 By treating with an alkali metal hydroxide; flash vaporizing |
| 03/22/1977 | US4013640 Solvent extraction, distillation |
| 03/15/1977 | US4012418 Process for the preparation of pyrrolidone-2 |
| 02/08/1977 | US4007202 Cephalosporin intermediates |
| 01/04/1977 | US4001274 Potassium hydrogen phosphate |
| 11/09/1976 | US3991115 Reacting cyclohexanone with hydroxylamine in ammonia |
| 11/09/1976 | US3991047 Process for preparing lactams |
| 10/26/1976 | US3988351 Complexes of polylactams and phenolic compounds |
| 10/26/1976 | US3988350 Germicides, plasticizers |
| 10/26/1976 | US3988319 Process for producing caprolactam from 6-aminocaproic acid |
| 10/26/1976 | US3988318 Low molecular weight complexes of lactams and polyhydroxy aromatic compounds |
| 08/17/1976 | US3975377 From an alkali metal lactamate and alkyl halide |
| 06/29/1976 | US3966763 Hydrogenation and hydrolysis of succinonitrile, hydrogenation catalyst, n-alkyl-2-pyrrolidone promoter |
| 06/29/1976 | US3966712 Crystallization, distillation |
| 06/01/1976 | US3960846 Method for purifying lactams |
| 05/04/1976 | US3954738 Stabilized epsilon caprolactam composition and method for preparing same |
| 05/04/1976 | US3954736 From cycloalkanone oximes in presence of steam |
| 04/27/1976 | US3953438 Preparation of cephalosporin ethers |
| 04/06/1976 | US3948888 Process for removing boric acid from lactams |
| 03/30/1976 | US3947406 Process for the production of lactams |
| 03/16/1976 | US3944559 Process for the production of alkyl-substituted unsaturated δ-lactams |
| 03/16/1976 | US3944543 Process for recovery of ε-caprolactam |
| 03/16/1976 | US3944542 Conversion of ketoximes into lactams in organic sulfoxide solvents |
| 02/17/1976 | US3939153 Depolymerization of polycaprolactam with steam |
| 02/10/1976 | US3937789 Process for the neutralization of acid solutions of caprolactam |
| 01/20/1976 | US3933873 Preparation of omega-aminoalkanoic acids |