| Patents for C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams (2,192) |
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| 07/03/2002 | EP1062203B1 Process for the continuous purification of crude epsilon-caprolactam |
| 07/03/2002 | EP0793650B1 Method of producing caprolactam |
| 06/27/2002 | WO2002050026A1 Process for synthesizing lactam |
| 06/27/2002 | WO2002050025A1 PROCESS FOR SYNTHESIZING β-LACTAM |
| 06/27/2002 | WO2001049665A3 Method for purifying lactames |
| 06/18/2002 | US6407230 Method for producing lactams using oligophosphate catalysts |
| 06/18/2002 | US6407228 Method for the preparation of β-lactam compound |
| 06/06/2002 | WO2002044246A1 Modified polylactam |
| 06/05/2002 | EP1211275A1 Modified Polylactam |
| 06/05/2002 | CN1085978C Recovery of epsilon-caprolactam |
| 05/29/2002 | EP0882018B1 Process for the preparation of a mixture of epsilon-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide |
| 05/23/2002 | WO2002040440A1 Production of 6-aminocaproic acid |
| 05/23/2002 | CA2423319A1 Production of 6-aminocaproic acid |
| 05/22/2002 | EP1206411A1 Process for treating a mixture comprising an ammonium sulfate solution phase and an aqueous lactam phase |
| 05/22/2002 | CN1349982A Prepn of lactam |
| 05/22/2002 | CN1085203C Process for the preparation of a mixture of 'epsilon'-caprolactam, 6-amino caproic acid and 6-aminocaproic amide |
| 05/21/2002 | US6392037 Treating 6-aminocaproic acid, 6-aminocaproate ester, 6-aminocaproamide, oligomers or polymers of these or mixtures in cyclization reactor in presence of superheated steam to produce epsilon caprolactam |
| 05/16/2002 | WO2002008171A3 Method for separating ammoniac |
| 05/16/2002 | WO2001072697A3 Process for the carbonylation of pentenenitrile |
| 05/16/2002 | US20020058808 Process for recovering caprolactam and steam |
| 05/02/2002 | EP1201652A1 Process for the preparation of lactams |
| 05/02/2002 | EP1201651A2 Process for producing e-caprolactam and apparatus for the process |
| 05/01/2002 | CN1083832C Method for preparing lactam |
| 04/18/2002 | US20020045748 Pentenenitrile reacted with carbon monoxide and water or alcohol in the presence of a source of Group VIII metal and a bidentate phosphine, arsine and/or stibine ligand to form cyanovaleric acid or ester |
| 04/18/2002 | DE10048824A1 Caprolactam recovery from new or post-consumption polyamide-six carpet waste, involves dissolving crushed waste in caprolactam, separating insoluble residue and direct alkaline depolymerization |
| 04/17/2002 | CN1082947C Process for simultaneously preparing caprolactan and hexamethylene diamine |
| 04/16/2002 | US6372939 Hydroformylating 3-pentenenitrile in presence of catalyst comprising group viii element to produce mixture of formylvaleronitriles, oxidizing to cyanovaleric acids, catalytically hydrogenating to 6-aminocaproic acid and isomers |
| 04/11/2002 | WO2002028525A1 PROCESS FOR THE PREPARATION OF A MIXTURE OF ε-CAPROLACTAM AND/OR ε-CAPROLACTAM PRECURSORS |
| 04/11/2002 | US20020042509 Method for producing epsilon-caprolactam and reactor for the method |
| 04/10/2002 | EP1195192A1 Process for the preparation of a mixture of epsilon-caprolactam and/or epsilon-caprolactam precursors |
| 04/10/2002 | CN1344252A Process for prepn. of epsilon-caprolactam |
| 04/09/2002 | US6368996 High activity and purification capability, higher degree of amorphism and stability; hydrorefining purification of caprolactam; leaching out some aluminum from heat treated alloy with an alkaline solution |
| 04/04/2002 | US20020040137 Process for producing epsilon-caprolactam and apparatus for the process |
| 04/03/2002 | EP1193251A2 Method for producing E-caprolactam and reactor for the method |
| 03/28/2002 | US20020038023 Process for nylon depolymerization |
| 03/28/2002 | US20020038022 Treating 6-aminocaproic acid, 6-aminocaproate ester, 6-aminocaproamide, oligomers or polymers of these or mixtures in cyclization reactor in presence of superheated steam to produce epsilon caprolactam |
| 03/27/2002 | EP1190769A1 A hydrogenation catalyst and its preparation |
| 03/27/2002 | CN1081630C Method of purifying 'epsilon'-caprolactam |
| 03/26/2002 | US6362333 Method for simultaneously producing a cyclic lactam and a cyclic amine |
| 03/26/2002 | US6362332 Coproduction of a cyclic lactam and a cyclic amine |
| 03/14/2002 | US20020030014 Treatment/purification of lactam media of reaction |
| 03/06/2002 | EP0729453B1 Process for manufacturing caprolactam |
| 03/05/2002 | US6353101 Preparing lactams by cyclizing hydrolysis of amino nitriles with water in gas phase on metal oxide catalysts |
| 03/05/2002 | US6353100 Reacting 5-formylvaleric acid, amide or ester in aqueous medium at elevated pressure with ammonia and hydrogen in presence of hydrogenation catalyst to form mixture of caprolactam, 6-aminocaproic acid, amide, ester and oligomers |
| 02/26/2002 | US6350883 Method for preparing lactam |
| 02/06/2002 | CN1334793A Process for producing aliphatic aldehydic acid and/or aliphatic dicarboxylic acid and catalyst for production |
| 02/05/2002 | US6344557 Process for producing ε-caprolactam |
| 01/30/2002 | EP1175396A1 Process for the preparation of epsilon-caprolactam |
| 01/29/2002 | US6342555 Depolymerizing multi- component waste material comprising polycaprolactam and non-polycaprolactam to form caprolactam comprising contacting waste material with superheated steam at prefered pressure to form caprolactam vapor stream |
| 01/24/2002 | US20020010329 Solvent extraction; purification; pouring melt of raw materials into solvent |
| 01/24/2002 | DE10033518A1 Process for the separation of ammonia from 2-phase reaction mixture obtained in amide preparation, involves separating phases and extracting organic phase with aqueous medium |
| 01/24/2002 | DE10033516A1 Distillative separation of ammonia, useful in purification of lactam, especially caprolactam, solution, is carried out at relatively low absolute pressure |
| 01/23/2002 | EP1173419A1 Process for nylon depolymerization |
| 01/23/2002 | CN1332158A Prep. of epsilon-hexanolactam |
| 01/23/2002 | CN1078207C Process for recovery of caprolactam from waste containing nylon |
| 01/22/2002 | US6340587 Treating racemic mixture with acylase; isolating pure enantiomorph of n-protected (1r,4s)-2-azabicyclo(2.2.1)hept-5-en-3-one |
| 01/17/2002 | US20020007058 Reductively aminating 5-formylvaleric acid and/or 5-formylvalerate in water with hydrogen and excess ammonia in presence of ruthenium on carrier as catalyst |
| 01/17/2002 | US20020005343 Process for the separation of a ketoxime or aldoxime from an amide |
| 01/16/2002 | EP0912508B1 Process for preparing caprolactam from 6-aminocapronitrile |
| 01/16/2002 | EP0882017B1 Process to prepare epsilon-caprolactam from 6-aminocaproic acid |
| 01/16/2002 | CN1331074A Process for hydrorefining caprolactam |
| 01/10/2002 | US20020004609 Process for production of aliphatic aldehyde-acid and/or aliphatic dicarboxylic acid and catalyst for the production |
| 01/08/2002 | US6337296 Catalyst for rearrangement of oxime to amide |
| 01/03/2002 | US20020002280 Using phenothiazine |
| 01/02/2002 | EP1167350A1 Process for producing epsilon-caprolactam |
| 12/25/2001 | US6333412 Process for the preparation of ε-caprolactam |
| 12/25/2001 | US6333411 From air, ammonia gas and cyclohexanone, supplemental oxygen is added downstream of the ammonia conversion zone to increase the quantity and rate of formation of nitrogen dioxide in the nox process gas stream. |
| 12/20/2001 | DE10029422A1 Reclamation of caprolactam from nylon textile materials, especially carpets, comprises treatment with base at atmospheric pressure or slightly above |
| 12/20/2001 | DE10028950A1 High yield caprolactam production by catalytic hydrogenation of a cyanovaleric acid derivative, followed by catalytic cyclization of the aminocaproic acid derivative-containing mixture obtained |
| 12/18/2001 | US6331624 Process for preparing 6-aminocaproamide |
| 12/12/2001 | CN1326438A Method for treating lactams and method for purifying lactam |
| 12/12/2001 | CN1076017C Process for producing caprolactane |
| 12/06/2001 | WO2001091715A2 Topical agent for dermatological use containing 4-hydroxyphenyl-alpha-d-glucopyranoside |
| 12/06/2001 | US20010049444 Pyridine-substituted benzanilides as potassium ion channel openers |
| 12/06/2001 | DE10027328A1 Distillative separation of ammonia, useful in purification of lactam, especially caprolactam, solution, is carried out at relatively low absolute pressure |
| 12/06/2001 | CA2409871A1 Topical agent for dermatological use |
| 12/05/2001 | CN1075810C Titanium dioxide-catalysed cyclisation in the liquid phase of 6-amino caproic acid nitrile to caprolactam |
| 11/29/2001 | WO2001090066A2 Method for obtaining pure n-vinyl pyrrolidone |
| 11/29/2001 | WO2001090065A1 Method for purifying lactams |
| 11/29/2001 | DE10121976A1 Phenothiazine or derivatives are used as stabilizers against polymerization and discoloration for N-alkenyl lactams with six- or more-membered lactam rings |
| 11/29/2001 | DE10026233A1 Verfahren zur Gewinnung von reinem N-Vinylpyrrolidon A process for the recovery of pure N-vinylpyrrolidone |
| 11/29/2001 | CA2409984A1 Method for purifying lactams |
| 11/27/2001 | US6323341 Process for the continuous purification of crude ε-caprolactam |
| 11/21/2001 | EP1154995A2 A process for recovering caprolactam and steam |
| 11/15/2001 | WO2001085682A1 Method for processing pyrollidone and n-vinyl pyrollidone residues |
| 11/15/2001 | DE10022988A1 Working-up of pyrrolidone and N-vinylpyrrolidone production residues (e.g. from sump) is effected by thermolysis to give increased yields |
| 11/08/2001 | WO2001083441A1 Method for producing cyclic lactams |
| 11/08/2001 | WO2001040179A3 Process for recovering monomeric units of a nylon from whole carpet |
| 11/08/2001 | DE10021201A1 Verfahren zur Herstellung cyclischer Lactame A process for preparing cyclic lactams |
| 11/08/2001 | DE10021199A1 Verfahren zur Herstellung von Caprolactam A process for the preparation of caprolactam |
| 11/08/2001 | DE10021193A1 Verfahren zur Herstellung cyclischer Lactame A process for preparing cyclic lactams |
| 11/08/2001 | DE10021192A1 Verfahren zur Herstellung von Caprolactam A process for the preparation of caprolactam |
| 11/01/2001 | WO2001081302A1 Process for producing amide compound |
| 10/24/2001 | CN1073558C Method for preparing caprolactam |
| 10/23/2001 | CA2178998C Process for preparing lactams |
| 10/18/2001 | WO2001077068A2 Process for preparing 6-aminocaproamide |
| 10/18/2001 | CA2403147A1 Process for preparing 6-aminocaproamide |
| 10/17/2001 | CN1318050A Method for simulataneously producing cyclic lactam and cyclic amine |
| 10/17/2001 | CN1318049A Lactam dehydration method |
| 10/17/2001 | CN1318048A Process for cyclization hydrolytizing aminopressiate into lactan |