ClassID:

94017

C07D201/16 - CPC Classification

Classification description:

Preparation, separation, purification or stabilisation of unsubstituted lactams Separation or purification

Recent Application in this class:
#1
20250263369
2025-08-21

PROCESS FOR THE RECOVERY OF EPSILON-CAPROLACTAM FROM NYLON 6-CONTAINING MULTI-COMPONENT MATERIAL

#2
20250145567
2025-05-08

METHOD FOR RECOVERING CATION COMPONENT OF IONIC LIQUID AND METHOD FOR REGENERATING IONIC LIQUID

#3
20250136547
2025-05-01

PROCESS FOR THE RECOVERY OF EPSILON-CAPROLACTAM FROM POLYAMIDE 6 COMPRISING FISHING NETS

#4
20250100965
2025-03-27

SEPARATION OF IMPURITIES IN A PROCESS FOR HYDROLYTICALLY DEPOLYMERIZING A POLYAMIDE

#5
20240132446
2024-04-25

COMPOSITIONS AND METHODS FOR REMOVAL OF N-METHYL-2-PYRROLIDONE (NMP) DEGRADATION PRODUCTS AND OTHER FOULANTS FROM NMP PURIFICATION SYSTEMS

#6
20240076450
2024-03-07

PURIFICATION METHOD FOR LAUROLACTAM

#7
20230054797
2023-02-23

Ammonium Sulphate Production on Industrial Scale

#8
20210171459
2021-06-10

PREPARATION OF CAPROLACTAM FROM 6-AMINO CAPROIC ACID OBTAINED IN A FERMENTATION PROCESS

#9
20210040036
2021-02-11

Process for the purification of caprolactam from a solution of crude caprolactam without organic solvent extraction

#10
20190382339
2019-12-19

Process for the purification of caprolactam from a solution of crude caprolactam without organic solvent extraction

#11
20180093949
2018-04-05

Efficient process for the synthesis of cyclic amides

#12
20170275258
2017-09-28

Method for producing epoxy compound containing hydrogen peroxide stabilizer

#13
20160221943
2016-08-04

Process for the recovery of ε-caprolactam from extract water

#14
20160200677
2016-07-14

PREPARATION OF CAPROLACTAM FROM 6-AMINO CAPROIC ACID OBTAINED IN A FERMENTATION PROCESS

#15
20160159657
2016-06-09

Process and apparatus for producing ammonium sulfate crystals

#16
20140171638
2014-06-19

Process for preparing purified caprolactam from the Beckmann rearrangement of cyclohexane oxime

#17
20130030146
2013-01-31

PREPARATION OF CAPROLACTAM FROM 6-AMINO CAPROIC ACID OBTAINED IN A FERMENTATION PROCESS

#18
20120330006
2012-12-27

METHOD OF MANUFACTURING EPSILON-CAPROLACTAM

#19
20110245510
2011-10-06

PROCESS FOR REMOVING BY-PRODUCTS FROM N-VINYLAMIDES

#20
20110224428
2011-09-15

Washing of an organic phase comprising caprolactam

#21
20110218344
2011-09-08

Production method of N-vinyl-2-pyrrolidone

#22
20110105793
2011-05-05

Method for separating amide from amino acid ionic liquid

#23
20100048860
2010-02-25

Continuous process for the extraction of polyamide-6

#24
20090312542
2009-12-17

System and method for recovering caprolactam from rearrangement mixtures

#25
20090088579
2009-04-02

Production Method of N-Vinyl-2-Pyrrolidone

#26
20080230368
2008-09-25

Process for the purification of lactams

#27
20080071081
2008-03-20

Method for Catalytic Hydrogenation Purification of Lactam Containing Chlorolactam Impurities

#28
20080058513
2008-03-06

System and process for purifying an aqueous solution of crude caprolactam

#29
20070060750
2007-03-15

Process for purifying caprolactam

#30
20060281928
2006-12-14

Process for rectifying n-vinyl-2-pyrrolidone

#31
20060090994
2006-05-04

Method for purifying caprolactam

#32
20060086602
2006-04-27

Purification of N-(2-hydroxyethyl)-2-pyrrolidone

#33
20060041122
2006-02-23

Purification of caprolactam

#34
20050176954
2005-08-11

Process for recovering caprolactam

#35
20050056532
2005-03-17

Method for purifying caprolactam from waste containing polyamide using UV radiation

#36
20050029086
2005-02-10

Process for distilling alkaline caprolactam product at reduced pressure

#37
20050011744
2005-01-20

Process for recovering caprolactam from aqueous caprolactam product using in situ prepared alkali amino caproate