| Patents for C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams (2,192) |
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| 02/27/1996 | US5495016 Preparation of caprolactam |
| 02/27/1996 | US5495015 Process for producing caprolactam through hydrolytic cleavage of molten polycaprolactam |
| 02/27/1996 | US5495014 Preparation of caprolactam |
| 02/20/1996 | US5493021 Preparation of lactams |
| 01/11/1996 | WO1996000722A1 Process for producing cyclic lactames |
| 01/04/1996 | DE4422610A1 Verfahren zur Herstellung von cyclischen Lactamen A process for preparing cyclic lactams |
| 12/26/1995 | US5478950 Reacting dicarboxylic acid(or anhyudride) with hydrogen in first catalytic bed, then reaction with primary amine or ammonia in second downstream catalytic bed |
| 11/07/1995 | US5464602 Sequential pyrolysis of plastic to recover polystyrene HCL and terephthalic acid |
| 10/17/1995 | US5459261 Removing impurities by mixing melt with aliphatic hydrocarbon, cooling to crystallize |
| 10/17/1995 | US5458740 Distillation |
| 10/11/1995 | EP0676394A1 Recovery of caprolactam from wate carpets |
| 10/10/1995 | US5457197 Monomer recovery from multi-component materials |
| 10/03/1995 | US5455346 Obtaining caprolactam by cleavage of molten polycaprolactam |
| 09/26/1995 | US5453516 Furanones, pyrrolidones |
| 09/06/1995 | EP0670308A1 Process for the recovery of caprolactam from caprolactam oligo- and/or polymers |
| 09/06/1995 | EP0670307A2 Process for the purification of crude caprolactam |
| 09/06/1995 | CN1107841A Process for the preparation of lactam |
| 09/05/1995 | CA2143820A1 Recovery of caprolactam from oligomers and/or polymers of caprolactam |
| 08/16/1995 | CN1106797A Synthesis of substituted diaminophthalimides and analogues |
| 08/15/1995 | US5441607 Recovery of caprolactam from distillation residues obtained in the purification of caprolactam |
| 08/08/1995 | US5440032 Method for purifying organic solution containing lactams |
| 08/02/1995 | EP0664787A1 Depolymerization of nylon 6,6 (and optionally) nylon 6 to obtain hexamethylene diamine (and caprolactam). |
| 08/02/1995 | CN1105987A Process for the purification of a water-epsilon-caprolactam mixture |
| 07/27/1995 | WO1995019950A1 Lewis acid catalyzed ammonolysis of nylon |
| 07/13/1995 | WO1995018783A1 Process for the preparation of a linear formyl compound |
| 07/13/1995 | CA2180663A1 Process for the preparation of a linear formyl compound |
| 06/28/1995 | EP0659741A1 Process for the preparation of lactams |
| 06/28/1995 | EP0659176A1 RECLAIMING $g(e)-CAPROLACTAM FROM NYLON 6 CARPET |
| 06/01/1995 | WO1995014665A1 Process for manufacturing caprolactam |
| 06/01/1995 | WO1995014664A1 Process for manufacturing caprolactam |
| 04/26/1995 | CN1028293C Process for treating amides |
| 04/04/1995 | US5403801 Process for producing ε-caprolactam and activating solid catalysts therefor |
| 03/29/1995 | EP0645358A1 Method of selective catalytic oxidation of organic compounds |
| 03/29/1995 | CN1100719A 3-bromo- and 2-nitroxy derivatives of 3-bromo- and 3,3-dibromo-4-oxo, zaetidines, processes for the preparation thereof and use thereof |
| 03/28/1995 | US5401843 Process for the preparation of caprolactam |
| 03/18/1995 | CA2132065A1 Process for the selective catalytic oxidation of organic compounds |
| 03/08/1995 | EP0641778A1 Process for purification of epsilon-caprolactam |
| 03/07/1995 | US5395974 Lewis acid catalyzed ammonolysis of nylon |
| 02/22/1995 | EP0639565A1 Process for preparing a lactam |
| 01/31/1995 | US5386070 In presence of other plastics, controlling temperature |
| 01/25/1995 | EP0635487A1 Hydrogenation process for use purification of a water caprolactam mixture |
| 01/11/1995 | EP0633247A1 2-Bromo- and 2-nitroxy derivatives of 3-bromo- and 3,3-dibromo-4-oxo-azetidines, processes for the preparation thereof and use thereof |
| 01/11/1995 | EP0633246A1 Process of extraction of caprolactam and of a carbonate of alkaline metal from residues of distillation supplied by the washing of caprolactam |
| 12/15/1994 | DE4319134A1 Process for the preparation of caprolactam |
| 12/07/1994 | EP0627417A1 Reclaiming epsilon-caprolactam from carpet waste |
| 11/23/1994 | EP0625142A1 Process for producing pyrrolidone and n-alkyl pyrrolidones. |
| 11/08/1994 | US5362870 Separtion of a mixture into hydrocarbon layer and water layer and recovering caprolactam from water layer |
| 11/01/1994 | US5360905 Recovery of caprolactam from oligomers and/or polymers of caprolactam |
| 10/27/1994 | WO1994024102A1 Conversion of nylon 6 and/or nylon 6,6 to monomers |
| 10/25/1994 | US5359099 Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products |
| 10/25/1994 | US5359062 Recovery of caprolactam from polycaprolactam |
| 10/25/1994 | US5359061 Controlled heating of mixed plastic waste in stream of carrier gas to first temperature range for first pyrolysis, then to second temperature range for second pyrolysis, separation |
| 10/13/1994 | DE4311621A1 Process for the depolymerisation of polycaprolactam |
| 10/11/1994 | US5354859 ε-caprolactam |
| 09/27/1994 | US5350847 Oxidative purification of caprolactam |
| 08/31/1994 | EP0612727A2 Semi-continuous depolymerization of nylon 6 polymer |
| 08/16/1994 | US5338861 Cleaving lactam N-carboxylate or lactim O-carboxylate with elimination of carbon dioxide by heating in gas or liquid phase |
| 07/21/1994 | DE4301406A1 Purification of epsilon-caprolactam contg. basic impurities |
| 06/22/1994 | EP0602515A1 Process for the preparation of 5-membered heterocycles |
| 06/14/1994 | US5321174 Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers |
| 05/17/1994 | US5312915 Process for producing epsilon-caprolactam |
| 05/10/1994 | US5310905 Depolymerizing in autoclave with aliphatic monocarboxylic acid |
| 04/28/1994 | WO1994008942A1 Depolymerization of nylon 6,6 (and optionally) nylon 6 to obtain hexamethylene diamine (and caprolactam) |
| 04/20/1994 | EP0592494A1 Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products |
| 04/19/1994 | US5304643 Process for producing epsilon-caprolactam |
| 04/05/1994 | US5300704 Fast pyrolysis of polystyrene and phenolics to recover styrene , cresols and phenol; temperature differentiation |
| 03/31/1994 | WO1994006763A1 RECLAIMING ε-CAPROLACTAM FROM NYLON 6 CARPET |
| 03/16/1994 | CN1083807A Process for the conversion of oximes into the corresponding amides |
| 03/15/1994 | US5294707 Melting and steaming Nylon 6 in a reactor containing catalyst; separating caprolactam in the distillate |
| 03/10/1994 | DE4319179A1 Capro-lactam purificn. by oxidn. of unsatd. lactam cpds. with oxygen - or gas mixt., pref. air, in alkaline medium, avoiding formation of manganese di:oxide from potassium permanganate, used in polyamide=6 mfr. |
| 03/08/1994 | US5292880 Synthesis of caprolactam using catalysts |
| 03/03/1994 | DE4228496A1 Depolymerisation of polycaprolactam - by melt depolymerisation in presence of alkaline catalyst, with addn. of di- or poly-carboxylic acid anhydride to form imide co-catalyst |
| 01/05/1994 | EP0577203A1 Process for the conversion of oximes into the corresponding amides |
| 01/04/1994 | US5276165 Preparation of N-substituted lactams |
| 12/29/1993 | EP0575860A1 Method of recovering caprolactam from mixed waste |
| 11/30/1993 | US5266694 Nylon component reclamation |
| 11/24/1993 | EP0570843A2 Process for the recovery of caprolactame from oligomers and/or polymers of caprolactame |
| 11/23/1993 | US5264571 Preparation of caprolactam by Beckmann rearrangement of cyclohexanone oxime |
| 11/18/1993 | EP0570136A1 Selective surface dealumination of zeolites and use of the surface-dealuminated zeolites |
| 11/18/1993 | EP0570110A1 Process for producing a high purity caprolactam |
| 11/10/1993 | EP0568882A1 Process for the recovery of caprolactame from polycaprolactame |
| 11/08/1993 | CA2095678A1 Recovery of caprolactam from polycaprolactam |
| 10/19/1993 | US5254684 Process for producing amide by liquid phase rearrangement of oxime |
| 10/06/1993 | EP0563878A2 Process for producing 4-substituted azetidinone derivatives |
| 10/05/1993 | CA1322795C Process for extracting organic composites and solutions and aqueous suspensions thereof |
| 09/16/1993 | WO1993017787A1 Catalyst and method for production of alkyl pyrrolidones |
| 09/14/1993 | US5245029 Ion exchange purification method of aqueous caprolactam solution |
| 09/07/1993 | US5242676 Reducing surface acidity |
| 08/31/1993 | US5241066 Agitation in acidic solvent, separation, depolymerization |
| 08/12/1993 | DE4203527A1 Verfahren zur herstellung von pyrrolidon und n-alkylpyrrolidonen A process for preparing pyrrolidone and N-alkylpyrrolidones |
| 08/08/1993 | WO1993016042A1 Process for producing pyrrolidone and n-alkyl pyrrolidones |
| 08/03/1993 | US5233037 Production of caprolactam by thermal depolymerization of polyamide 6 |
| 07/13/1993 | US5227482 Method for producing a lactam |
| 07/13/1993 | US5227028 Hydrolysis of ketoximes or alkoximes |
| 07/06/1993 | US5225547 Using an alkylation reagent and disubstituted formamide or acid amide as promoters |
| 06/09/1993 | EP0545150A1 Process for the preparation of N-substituted lactams by reductive amination of dicarboxylic acid derivatives with mixtures of primary, secondary and tertiary amines |
| 06/02/1993 | EP0544531A1 Process for the preparation of epsilon-caprolactam by Deckamnn-rearrangement in the phase in the presence of a zeolite catalyst and nitrogen-containing compounds |
| 06/02/1993 | EP0544530A1 Process for producing epsilon-caprolactam by Beckmann-rearrangement in the gas phase in the presence of a zeolite catalyst and water |
| 06/01/1993 | US5216149 Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products |
| 05/18/1993 | US5212302 Process for producing epsilon-caprolactam and activating solid catalysts therefor |