Patents
Sitemap › C07 - Organic chemistry › C07D - Heterocyclic compounds › C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams
Patents for C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams (2,192)
12/2003
12/10/2003EP1286963B1 Method for separating ammonia from solutions containing caprolactam and ammonia
12/10/2003CN1130341C Process for purification of caprolactam obtained from depolymerization of polyamide-containning carpet
12/09/2003US6660857 Process for the preparation of ε-caprolactam
12/04/2003US20030225170 Separation of polycaprolactam fibers from backings, then exposing to steam and isolating caprolactam; depolymerization
11/2003
11/26/2003EP1363884A2 Pyridine-substituted benzanilides as potassium ion channel openers
11/18/2003US6649757 Process for producing laurolactam from cyclododecanone
11/12/2003EP1361211A1 Process for preparation of e-caprolactam
11/11/2003US6645899 Treating zeolites with vapor phase comprising methanol, a methyl ester, or a methyl halide at molar concentrations ranging from 20-100% molar, at temperature ranging from 250-380 degrees
11/06/2003US20030208068 Base-promoted isomerization of 3-unsubstituted-4-arylisoxa-zoles, followed by acidification of the enolates provides the title compound; coupling; efficiency; chemical intermediates for corticotropin releasing factor (CRF) receptors
11/05/2003CN1453271A Method of eleminating miniature amount of impurities in epsilon-caprolactam water solution
11/05/2003CN1126736C Process for treating lactams and method for purifying lactam
10/2003
10/23/2003US20030198610 Topical agent for dermatological use
10/22/2003CN1450988A Process for preparing 6-aminocaproamide
10/21/2003US6635151 Refluxing aqueous mixtures of caprolactam and ammonia from cyclization of aminocapronitrile, to remove water
10/16/2003WO2002055493A9 METHOD FOR STORING AND TRANSPORTING N-VINYL-ε-CAPROLACTAM
10/15/2003EP1351931A1 METHOD FOR STORING AND TRANSPORTING N-VINYL-$g(e)-CAPROLACTAM
10/15/2003EP0931061B1 Process for the separation of cyclohexanone oxime from caprolactam
10/14/2003US6632964 Catalytic oxidation of a cyclic ketone
10/08/2003EP0854864B1 Process for the recovery of caprolactam from waste containing nylon by extraction with alkyl phenols
09/2003
09/24/2003EP1346981A1 PROCESS FOR SYNTHESIZING $g(b)-LACTAM
09/24/2003EP1098705B1 Method for reactivating a catalyst for cyclizing hydrolysis of an aminonitrile into a lactam and use of the regenerated catalyst for making lactams
09/23/2003CA2207942C Preparation of caprolactam
09/10/2003EP1257532B1 PROCESS FOR THE PREPARATION OF $g(e)-CAPROLACTAM
09/09/2003CA2096712C Recovery of caprolactam from oligomers and/or polymers of caprolactam
09/04/2003US20030166947 Extraction, purification
09/03/2003EP1339489A1 PROCESS FOR THE PREPARATION OF A MIXTURE OF $g(e)-CAPROLACTAM AND/OR $g(e)-CAPROLACTAM PRECURSORS
09/03/2003CN1440382A Method for separating ammoniac
09/03/2003CN1120151C Prepn of lactam
08/2003
08/27/2003EP1337575A1 Modified polylactam
08/27/2003CN1119333C Process for hydrorefining caprolactam
08/21/2003US20030155299 Caprolactam from aminocapronitrile; extraction, distillation
08/20/2003EP1335897A1 Production of 6-aminocaproic acid
08/20/2003CN1437582A Method for purifying lactams
08/14/2003US20030153749 Method for the production of caprolactam
08/13/2003EP1054864B1 Process for the preparation of epsilon-caprolactam
08/13/2003CN1436171A Method for production of caprolactam
08/13/2003CN1435412A Process for preparing epsilon-caprolactam
08/13/2003CN1117730C Process for preparation of ÔÇ£epsilonÔÇØ-caprolactam
07/2003
07/31/2003WO2003040159A8 Bidentate ligands for the carbonylation of unsaturated compounds
07/31/2003US20030143146 Method for separating ammoniac
07/30/2003CN1116280C Prepn. of caprolactam
07/24/2003US20030139596 Process for producing laurolactam from cyclododecanone
07/23/2003EP1329448A1 Procsess for producing laurolactam from cyclododecanone
07/23/2003CN1431994A Method for obtaining pure N-vinyl pyrrolidone
07/23/2003CN1431993A Method for separating ammonia from solutions contg. caprolactam and ammonia
07/22/2003US6596862 Purification of N-vinyl-ε-caprolactam
07/17/2003US20030132098 Distilling of mixture at an absolute pressure of less than 10 bar
07/17/2003US20030131784 Process for the crystallization of non-sucrose substances
07/10/2003US20030130544 Process for the telomerization of a conjugated diene, catalyst and bidentate ligand useful therein
07/09/2003CN1429211A Method for processing pyrollidone and N-vinyl pyrollione residues
07/09/2003CN1113865C Method for producing cyclic lactams
07/09/2003CN1113864C Process for preparing caprolactam using 6-aminocapronitrile
07/08/2003CA2268807C Method for treating lactams
07/03/2003WO2003053935A1 Method for preparing lactam
07/03/2003WO2002062295A3 Pyridine-substituted benzanilides as potassium ion channel openers
07/03/2003US20030125546 Method for producing caprolactam from 6-aminocapronitrile
07/03/2003US20030125545 Hydrolysis of silicon alkoxides to form silica sol which is mixed with zeolite, followed by basification, then emulsification/gelation in hydrocarbon and nonionic/cationic surfactant
07/03/2003US20030125544 Method for producing cyclic lactams
07/02/2003CN1427822A Method for producing caprolactam from 6-aminocapronitrile
07/02/2003CN1427821A Method for producing cyclic lactams
07/02/2003CN1427820A Method for producing caprolactam from 6-aminocapronitrile and crystalline purifying
07/02/2003CN1427819A Method for producing cyclic lactams
07/02/2003CN1113055C Continuous preparation of aqueous mixture of epsilon-caprolactam and its precursors
06/2003
06/24/2003US6583281 Using phenothiazine
06/19/2003US20030114664 Method for producing cyclic lactams
06/17/2003US6579979 Hydrogenating liquid medium of reaction in presence of hydrogenation catalyst, reaction medium having an effective lactam-purifying amount of ammonia dissolved therein
06/11/2003CN1423636A Method for purifying lactames
06/05/2003WO2003045911A1 Process for recovering caprolactam
06/05/2003US20030105338 Method for processing pyrollidone and n-vinyl pyrollidone residues
06/05/2003US20030105322 Catalytically reacting 6-aminocapronitrile and water in the gas phase, removing ammonia from the resulting mixture of caprolactam, water, high-and low-boiling components, then removing water, then crystallization
06/04/2003EP1105374B1 Lactam dehydration method
06/04/2003EP0801647B1 Method of simultaneously preparing caprolactam and hexamethylene diamine
06/04/2003CN1422248A Process for the carbonylation of pentenenitrile
06/04/2003CN1421474A Process for producing polycaprolactam
05/2003
05/28/2003EP1314475A1 Process for the preparation of MFI-Type zeolitic catalysts
05/28/2003EP0836587B1 Process for separating pivalic acid from spent reaction mixtures
05/27/2003CA2146630C Nylon component reclamation
05/21/2003EP1312604A1 Method of production of lactams
05/21/2003CN1419540A Proces for the preparation of & epsii-caprolactam
05/15/2003WO2003040159A2 Bidentate ligands for the carbonylation of unsaturated compounds
05/15/2003WO2003040065A2 Bidentate ligand for the telomerization of dienes
05/15/2003CA2466252A1 Bidentate ligands for the carbonylation of unsaturated compounds
05/15/2003CA2466239A1 Bidentate ligand for the telomerization of dienes
05/13/2003US6562965 Convergent synthesis of α-aryl-β-ketonitriles
05/08/2003US20030088093 Method of production of lactam
05/07/2003EP1054863B1 2-aminoquinoline derivatives having d4-agonistic activity
05/07/2003CN1415607A Method for synthesizing caprolactam
05/07/2003CN1107648C Method for treating benzene extraction waste liquor in prodn. of caprolactam
04/2003
04/30/2003CN1413987A Preparation method for producing hexanolactam catalyst
04/30/2003CN1413986A Solid acid catalyst for preparing hexanolactam
04/30/2003CN1107055C Method for preparation of lactan
04/22/2003CA2211015C Method for preparing lactam
04/16/2003EP0980355B1 Method for producing cyclic lactams
04/09/2003EP1299347A2 Method for separating ammoniac
04/09/2003EP1131287B1 Method for treating lactams and method for purifying a lactam
04/09/2003EP0769004B1 Process for producing cyclic lactames
04/03/2003US20030065169 Reuse of carpet wastes
04/02/2003EP0815078B1 Process for producing caprolactam
03/2003
03/27/2003WO2003024927A1 Process for producing lactam
03/26/2003EP1102720B1 Method for distilling ammonia
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