| Patents for C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams (2,192) |
|---|
| 04/07/1993 | EP0535455A1 Process for the production of caprolactam by Beckmann rearrangement of cyclohexanone oxime |
| 03/17/1993 | EP0531673A1 Process for the preparation of N-substituted lactams |
| 03/04/1993 | DE4129076A1 Caprolactam] economical purificn. for high purity - by single evapn. stage and part condensn., fractionating uncondensed vapour in packed column, and taking=off total condensate fraction |
| 03/03/1993 | EP0529470A1 Process for the recovery of caprolactam by pyrolysis of poylamide 6 |
| 02/04/1993 | WO1992022528A3 Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products |
| 01/13/1993 | EP0522235A1 Process for the recovery of epsilon-caprolactam from nylon 6 carpet |
| 12/23/1992 | WO1992022528A2 Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products |
| 12/08/1992 | US5169870 Separation from wastes; catalytic depolymeriztion |
| 11/25/1992 | EP0515063A1 Process for producing amide by liquid phase rearrangement of oxime |
| 10/27/1992 | CA1309404C Process for purifying caprolactam |
| 10/21/1992 | EP0509493A1 Method for producing a lactam |
| 09/08/1992 | CA1307261C Process for the synthesis of epsilon-caprolactam |
| 08/04/1992 | US5136051 Reacting a 3-cyanopropionate with hydrogen in the presence of ammonia; catalyst containing cobalt, manganese, and phosphorus |
| 07/15/1992 | EP0494535A1 Process for producing epsilon-caprolactam and activating solid catalysts therefor |
| 05/27/1992 | EP0487090A2 Process for preparing caprolactam and laurolactam |
| 04/22/1992 | EP0481351A2 Process for the preparation of 2-pyrrolidones |
| 02/25/1992 | CA1296333C Preparation of caprolactam |
| 02/12/1992 | CN1058588A Process for treating amides |
| 01/08/1992 | EP0464943A1 Process for treating amides |
| 12/18/1991 | EP0461835A2 Method for purifying organic solution containing lactams |
| 12/18/1991 | EP0461779A1 Reaction accelerator for rearrangement of oxime to amide and process for producing amides by rearrangement of oximes |
| 12/10/1991 | US5071802 Regeneration of catalysts by burning in the presence of alcohols |
| 10/23/1991 | EP0346332B1 Method and apparatus for recovering caprolactam |
| 07/16/1991 | US5032684 Continuous purification of caprolactam |
| 04/16/1991 | CA1283102C Process for the production of amides |
| 02/06/1991 | EP0411455A1 Process for continuous purification of caprolactam |
| 11/06/1990 | US4968793 Process for producing ε-caprolactam |
| 10/16/1990 | US4963673 Preparation of caprolactam |
| 10/16/1990 | US4963672 Preparation of caprolactam |
| 10/02/1990 | CA1274827A1 PREPARATION OF .epsilon.-CAPROLACTAM |
| 10/02/1990 | CA1274826A1 PRODUCTION OF .epsilon.-CAPROLACTAM |
| 09/19/1990 | EP0388070A1 Regeneration of catalysts |
| 08/14/1990 | CA1272718A1 Preparation of caprolactam |
| 08/01/1990 | EP0380364A2 Process for producing epsilon-caprolactam |
| 07/04/1990 | EP0376123A1 Process of preparation of caprolactam |
| 07/04/1990 | EP0376122A1 Process for the preparation of caprolactam |
| 05/22/1990 | US4927924 Synthesis of caprolactam |
| 02/13/1990 | US4900821 Method for producing high-purity caprolactam |
| 01/09/1990 | US4892624 Workup of distillation residues from the purification of caprolactam |
| 12/21/1989 | DE3820737A1 Process for the recovery of caprolactam from aqueous solutions by extraction |
| 12/20/1989 | EP0346332A1 Method and apparatus for recovering caprolactam. |
| 11/28/1989 | US4883915 Catalyzed oxime conversions |
| 11/21/1989 | US4882430 Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof |
| 10/18/1989 | EP0337323A2 Method for producing high-purity caprolactam |
| 10/10/1989 | US4873326 Cyclization of n-alkylated caproic acid |
| 10/10/1989 | US4873325 Catalytic conversion of oximes with non-zeolitic molecular sieves; sapo-11 and sapo-41 |
| 09/26/1989 | USRE33073 Obtaining caprolactam by cleaving oligomers of caprolactam |
| 08/08/1989 | US4855053 Extraction of organic compounds from aqueous solutions |
| 04/19/1989 | EP0311960A2 Process for the recuperation of caprolactame from light or heavy fractions, from the caprolactam destillation, or from their mixtures |
| 03/15/1989 | EP0306874A2 Process for working-up distillation residues obtained during the purification of caprolactam |
| 03/01/1989 | EP0304685A1 Process for the preparation of N-alkylocaprolactams |
| 02/21/1989 | US4806638 Neutralization of reaction mixtures obtained by Beckman rearrangement of cyclohexanone oxime |
| 02/14/1989 | US4804754 Multistage; aftertreatment in delay zone |
| 02/14/1989 | US4804473 Removal of water-immiscible solvents from offgases containing same |
| 02/09/1989 | DE3825524A1 Process for purifying caprolactam |
| 01/24/1989 | US4800227 From diacid, anhydride, lactone or imide |
| 01/03/1989 | US4795571 Purification of frozen crystal layers |
| 12/06/1988 | US4789741 Reacting cyclohexanone oxime with excess of oleum |
| 12/06/1988 | CA1246077A1 Vinyl carboxylic acid derivatives, their production and use |
| 09/14/1988 | EP0282032A2 Process for the synthesis of epsilon-caprolactam |
| 08/30/1988 | US4767857 Cyclization of 6-aminocaproic esters by heating |
| 08/30/1988 | US4767856 Preparation of caprolactam from 6-aminocaproic acid, esters and amides |
| 08/30/1988 | US4767503 Removal of light impurities from caprolactam by distillation with water |
| 08/24/1988 | EP0279439A2 Purification process for crystallized layers |
| 08/16/1988 | US4764607 Method for recovering caprolactam |
| 07/26/1988 | US4760068 Certain pyridyl alkenoic acid derivatives which inhibit the action of thromboxane A2 synthetase |
| 07/20/1988 | CN88100077A Removal of water-immiscible solvents from offgases containing same |
| 07/13/1988 | EP0274111A2 Method for removing benzene and toluene from exhaust gases containing the same |
| 06/30/1988 | WO1988004651A1 Method and apparatus for recovering caprolactam |
| 06/22/1988 | EP0271817A1 Process for preparing caprolactam from 6-aminocaproic acid or from its esters and/or amides |
| 06/22/1988 | EP0271815A1 Process for the preparation of caprolactam |
| 06/15/1988 | EP0271014A1 Process for preparing caprolactam by the Beckmann rearrangement of cyclohexanone oxime |
| 04/20/1988 | EP0264126A2 Process for the neutralisation of reaction mixtures obtained by the Beckmann rearangement of cyclohexanone oximes |
| 03/15/1988 | US4731454 Process for producing lactams |
| 03/15/1988 | US4731445 From alkyl 5-formylvalerate |
| 03/08/1988 | US4730041 Preparation of ε-caprolactams |
| 03/08/1988 | US4730040 Preparation of caprolactam |
| 02/23/1988 | US4727078 7-phenyl-7-(3-pyridyl)-6-heptenoic acid or derivatives thereof which inhibit the activity of thromboxanes synthetase |
| 01/19/1988 | US4720328 Phosphorus pentoxide |
| 01/07/1988 | EP0251168A2 Process for the production of amides |
| 01/05/1988 | US4717770 Cyclohexanone oxime, zeolites, surface treatment with organosilicon or organogermanium compounds |
| 01/05/1988 | US4717769 Production of epsilon-caprolactam |
| 11/24/1987 | US4709024 Production of epsilon-caprolactam |
| 10/28/1987 | EP0242960A2 Production of epsilon-caprolactam |
| 10/28/1987 | EP0242505A1 Process for preparing caprolactam |
| 09/29/1987 | US4697010 Catalyzed oxime conversions |
| 09/09/1987 | EP0236092A2 Process for producing e-caprolactam |
| 09/09/1987 | EP0235553A2 Process for the preparation of epsilon-caprolactam |
| 09/02/1987 | EP0234295A2 Process for the preparation of epsilon-caprolactam |
| 09/02/1987 | EP0234088A2 Production of E-caprolactam |
| 08/25/1987 | US4689412 Method for preparing lactams having 8 to 15 carbon atoms from the corresponding oximes |
| 07/28/1987 | US4683344 Reaction of hydroxy or amide compound with grignard, reagent solid state |
| 07/28/1987 | US4683305 Fluidized bed of alumina particles |
| 07/15/1987 | EP0228957A1 Process for extraction of organic compounds from their solutions or from aqueous suspensions |
| 06/24/1987 | EP0225974A2 Process for producing lactams with 8 to 15 carbon atoms from their corresponding oximes |
| 05/05/1987 | CA1221365A1 Recovery of caprolactam from caprolactam-containing distillation residue |
| 03/03/1987 | US4647661 Method of preparing ω-lactams, in particular caprolactam |
| 01/21/1987 | EP0209021A2 Process for the recovery of caprolactam by decomposition of caprolactam oligomers |
| 01/20/1987 | CA1216813A1 Removal of light impurities from caprolactam by distillation with water |
| 12/09/1986 | US4628085 Use of silica catalyst for selective production of lactams |