ClassID:

91806

C07C51/50 - CPC Classification

Classification description:

Preparation of carboxylic acids or their salts, halides or anhydrides; Separation; Purification; Stabilisation; Use of additives Use of additives, e.g. for stabilisation

Recent Application in this class:
#1
20260085029
2026-03-26

METHOD FOR PRODUCING BIOBASED ALPHA-BETA-UNSATURATED CARBOXYLIC ACIDS FROM POLY(3-HYDROXYALKANOATE) CONTAINED IN BIOMASS

#2
20260022090
2026-01-22

REMOVAL OF ALDEHYDES IN ACETIC ACID PRODUCTION

#3
20260015310
2026-01-15

Crude terephthalic acid hydrorefining catalyst, preparation method therefor, and application thereof

#4
20250382253
2025-12-18

METHOD FOR BATCHED RECOVERY OF HEAVY BY-PRODUCTS FROM THE MANUFACTURE OF ACRYLIC ACID

#5
20250282698
2025-09-11

ANTIFOULANT COMPOSITIONS FOR HIGH-SEVERITY PROCESSING OF VINYLIC MONOMER STREAMS

#6
20250145556
2025-05-08

STORAGE AND/OR TRANSPORT OF ETHYLENICALLY UNSATURATED COMPOUNDS

#7
20240092720
2024-03-21

ANTI-FOULING COMPOSITION AND USES THEREOF

#8
20230312450
2023-10-05

COLORLESS MONOCHLOROACETIC ACID AND THE METHOD OF PREPARATION THEREOF

#9
20230312440
2023-10-05

ANTIFOULANT COMPOSITIONS FOR HIGH-SEVERITY PROCESSING OF VINYLIC MONOMER STREAMS

#10
20230242472
2023-08-03

POLYMERIZATION INHIBITORS

#11
20230132285
2023-04-27

PROCESS FOR INHIBITING THE UNDESIRED FREE-RADICAL POLYMERIZATION OF ACRYLIC ACID PRESENT IN A LIQUID PHASE P

#12
20220315516
2022-10-06

Methods and systems for producing acetic acid

#13
20210395179
2021-12-23

METHOD OF PRODUCING HIGHER ALKANONES, PREFERABLY 6-UNDECANONE, AND DERIVATIVES THEREOF

#14
20210331997
2021-10-28

Method for separating trans isomeric crocetin from cis isomeric crocetin

#15
20210309598
2021-10-07

Method for inhibiting unwanted radical polymerisation of acrylic acid present in a liquid phase P

#16
20210230092
2021-07-29

Method for preparing 4,4′-dihydroxy-[1,1′-biphenyl-3,3′-dicarboxylic acid]

#17
20210198174
2021-07-01

PROCESS FOR MAKING HIGH PURITY SALTS

#18
20210147330
2021-05-20

METHOD FOR PRODUCING 3-HYDROXY-3-METHYLBUTYRATE OR SALT THEREOF

#19
20210139402
2021-05-13

Acrylic acid, and methods of producing thereof

#20
20210053902
2021-02-25

Water-based extraction and purification processes for cannabinoid acids

#21
20200354302
2020-11-12

Method of recovering organic acids from aqueous solutions

#22
20200339498
2020-10-29

Method of isolating lipids from a lipids containing biomass

#23
20200325093
2020-10-15

ACRYLIC ACID, AND METHODS OF PRODUCING THEREOF

#24
20200207694
2020-07-02

Fluorination of acrylate esters and derivatives

#25
20200139263
2020-05-07

Method of continuous recovery of (meth)acrylic acid and apparatus for the method

#26
20200031752
2020-01-30

FLUORINATION OF ACRYLATE ESTERS AND DERIVATIVES

#27
20200002262
2020-01-02

Process for preventing the deposition of polymers in a process for purifying (meth)acrylic acid

#28
20190382329
2019-12-19

Method and apparatus for continuously recovering (meth)acrylic acid

#29
20190248727
2019-08-15

Method for separating formic acid from a reaction mixture by means of extraction

#30
20190241496
2019-08-08

Nitroxide hydroxylamine and phenylenediamine combinations as polymerization inhibitors for ethylenically unsaturated monomer processes

#31
20190225568
2019-07-25

Method for preparing 1,3-cyclohexanedicarboxylic acid

#32
20190161428
2019-05-30

Fluorination of acrylate esters and derivatives

#33
20190084912
2019-03-21

PROCESS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES

#34
20190071383
2019-03-07

Method of continuous recovery of (meth)acrylic acid and apparatus for the method

#35
20190054395
2019-02-21

Method of continuous recovery of (meth)acrylic acid and apparatus for the method

#36
20190040293
2019-02-07

LATENT HEAT STORAGE MEDIUM

#37
20190023642
2019-01-24

Nitroxide hydroxylamine and phenylenediamine combinations as polymerization inhibitors for ethylenically unsaturated monomer processes

#38
20180258014
2018-09-13

Polymerization inhibitor compositions

#39
20180237372
2018-08-23

Method for producing acrylic acid

#40
20180222837
2018-08-09

Compositions comprising shikimic acid obtained from oil palm-based materials

#41
20180171035
2018-06-21

Composition for the immediate stopping of a free-radical polymerization

#42
20180099919
2018-04-12

Process for the preparation of (1R,3R)- and (1S,3S)-2,2-dihalo-3-(substituted phenyl)cyclopropanecarboxylic acids

#43
20180099918
2018-04-12

Fluorination of acrylate esters and derivatives

#44
20170267618
2017-09-21

Acrylic acid production process

#45
20170129842
2017-05-11

Compositions comprising shikimic acid obtained from oil palm based materials and method of producing thereof

#46
20170036985
2017-02-09

Fluorination of acrylate esters and derivatives

#47
20160251297
2016-09-01

Unit and process for purification of crude methyl methacrylate

#48
20160244398
2016-08-25

Nitroxide hydroxylamine and phenylenediamine combinations as polymerization inhibitors for ethylenically unsaturated monomer processes

#49
20160221915
2016-08-04

Method for the dehydration of 3-hydroxypropanoic acid to form acrylic acid

#50
20160168068
2016-06-16

Process for producing acetic acid by introducing a lithium compound

#51
20160168062
2016-06-16

Process for depolymerization of lignin

#52
20160137579
2016-05-19

Process for the preparation of benzene derivatives from furan derivatives

#53
20160090343
2016-03-31

Methods for suppressing isomerization of olefin metathesis products

#54
20150314266
2015-11-05

Adsorbent for organic fluoro-compound comprising cyclodextrin-supported polymer

#55
20150299082
2015-10-22

Methods, systems and devices for simultaneous production of lactic acid and propylene glycol from glycerol

#56
20150246866
2015-09-03

Acetic acid production process

#57
20150203432
2015-07-23

RECOVERY OF ORGANIC ACIS FROM DILUTE SALT SOLUTIONS

#58
20150148555
2015-05-28

Method for Solubilising and Separating One or a Plurality of Carboxylic Acids and Use of a Demobilised Solubilising Compound

#59
20150141696
2015-05-21

PROCESS FOR THE PREPARATION OF ADAPALENE AND RELATED COMPOUNDS

#60
20150005469
2015-01-01

Method for measuring the thermal stability of a succinic acid crystal intended for the production of polymers

#61
20140350296
2014-11-27

Compositions for carboxylic acid production and methods for making and using same

#62
20140349355
2014-11-27

Polycarboxylic acid extraction

#63
20140309419
2014-10-16

METHOD FOR ENHANCING THE THERMAL STABILITY OF IONIC COMPOUNDS

#64
20140303401
2014-10-09

Process for recovering aliphatic monocarboxylic acids from distillation

#65
20140228571
2014-08-14

Method of stabilizing polymerizable compounds

#66
20140194559
2014-07-10

Novel Inhibitor Compositions and Methods of Use

#67
20140171614
2014-06-19

METHOD FOR PRODUCING ORGANIC ACID

#68
20140121411
2014-05-01

Process for separating monochloroacetic acid and dichloroacetic acid via extractive distillation

#69
20130345474
2013-12-26

Process for the production of acetic acid

#70
20130317241
2013-11-28

Process for concentrating omega-3 fatty acids

#71
20130264186
2013-10-10

Process for producing acetic acid

#72
20130216666
2013-08-22

CASHEW NUT SHELL LIQUID WITH IMPROVED STABILITY

#73
20130165707
2013-06-27

Methods for suppressing isomerization of olefin metathesis products

#74
20130085303
2013-04-04

Processes for Producing Acrylic Acids and Acrylates

#75
20130030214
2013-01-31

Process for the preparation of adapalene and related compounds

#76
20120085969
2012-04-12

Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P

#77
20120074354
2012-03-29

Method for the restabilization of (meth)acrylic monomers

#78
20120067715
2012-03-22

METHOD FOR PURIFYING CARBOXYLIC ACIDS CONTAINING HALOGEN COMPOUNDS

#79
20110301371
2011-12-08

Process for producing a conjugated unsaturated fatty acid

#80
20110290635
2011-12-01

Polymerization inhibitor composition and method of inhibiting polymerization of distillable monomers

#81
20110160484
2011-06-30

Method of Inhibiting Polymerization and Fouling in Acrylic Acid and Acrylate Processes

#82
20110140050
2011-06-16

Process for inhibiting polymerization of (meth)acrylic acid and/or (meth)acrylic esters

#83
20110071311
2011-03-24

Production of ethylenically unsaturated acids or esters thereof

#84
20110039961
2011-02-17

Method for producing particulate water absorbing agent containing water absorbent resin as main component

#85
20110021725
2011-01-27

Production method and production apparatus of particulate water absorbing agent containing water absorbent resin as main component

#86
20110009667
2011-01-13

Use of chemical reaction to separate ethylene from ethane in ethane-based processes to produce acetic acid

#87
20100168434
2010-07-01

INHIBITION OF POLYMERISATION

#88
20100130778
2010-05-27

Method for producing (meth)acrylic acid

#89
20100130766
2010-05-27

Polymerization inhibition method

#90
20100056739
2010-03-04

Transportation of a Monomer Composition in a Transport Means or Pipe

#91
20100025635
2010-02-04

Method of improving flowability of adipic acid

#92
20090326268
2009-12-31

COMPOSITIONS FOR CARBOXYLIC ACID PRODUCTION AND METHODS FOR MAKING AND USING SAME

#93
20090299090
2009-12-03

Method for production of purified (meth)acrylic acid

#94
20090240092
2009-09-24

ORTHO-NITROSOPHENOLS AS POLYMERIZATION INHIBITORS

#95
20090221780
2009-09-03

Process for storing a monomer phase which is liquid under the conditions of storage

#96
20090221705
2009-09-03

OMEGA 3

#97
20090137843
2009-05-28

METHOD FOR PRODUCING ORGANIC ACID

#98
20090131713
2009-05-21

Process for the preparation of adapalene and related compounds

#99
20090084667
2009-04-02

Process for manufacturing high purity methacrylic acid

#100
20080271984
2008-11-06

Handling device and producing system of easy-to-polymerize compound

#101
20080234446
2008-09-25

Process for transporting in the tank of a tank truck or tanker ship a liquid monomer phase withdrawn from a storage vessel

#102
20080228002
2008-09-18

Metal surfaces to inhibit ethylenically unsaturated monomer polymerization

#103
20080128263
2008-06-05

PROCESS FOR PRODUCING ACRYLIC ACID

#104
20080119669
2008-05-22

Process for the Recovery of Organic Compounds from Mixtures Containing (Meth)Acrylic Acid by Extraction with a Protic Solvent

#105
20080064899
2008-03-13

Method For Producing Alpha, Beta-Unsaturated Carboxylic Acid

#106
20080021241
2008-01-24

Process for production of methacrylic acid

#107
20070213298
2007-09-13

Omega 3

#108
20070197785
2007-08-23

Method for inhibiting polymerization of (METH) acrylic acid and its esters using an inhibitor and a process for making a compound useful as such an inhibitor

#109
20070193873
2007-08-23

Process for producing acrylic acid

#110
20070167650
2007-07-19

Method of manufacturing (meth) acrylic acid

#111
20070167649
2007-07-19

METHOD FOR PRODUCING ORGANIC ACID

#112
20070161816
2007-07-12

METHOD FOR PRODUCING ORGANIC ACID

#113
20070027340
2007-02-01

Azeotropic distillation process for separating acetic acid, methylacetate and water in the production of an aromatic carboxylic acid

#114
20070015938
2007-01-18

Process for manufacturing high purity methacrylic acid

#115
20070010690
2007-01-11

Process for manufacturing high purity methacrylic acid

#116
20070004903
2007-01-04

Method for the separation of monomers from a composition containing a monomer

#117
20060287548
2006-12-21

Radical interceptors as stabilizers of polymerizable compounds

#118
20060283699
2006-12-21

Ortho-nitrosophenols as polymerization inhibitors

#119
20060142613
2006-06-29

Process for producing (meth)acrylic acid

#120
20060074257
2006-04-06

Method for inhibiting polymerization of (meth)acrylic acid and its esters using an inhibitor and a process for making a compound useful as such an inhibitor

#121
20050288374
2005-12-29

Chemical stabilization of solubilized retinoids and aqueous compositions comprised thereof

#122
20050261515
2005-11-24

Use of polyalkenyl succinimides in acrylic acid production

#123
20050215813
2005-09-29

Method for preventing clogging in apparatus for handling (meth)acrylic acid or esters thereof

#124
20050192462
2005-09-01

Method for handling high-viscosity substances

#125
20050143604
2005-06-30

Method for producing acrylic acid

#126
20050139807
2005-06-30

Composition and method for preventing fouling in (meth)acrylic acid processes

#127
20050119498
2005-06-02

Process for the production of metal salts of radical-polymerizable compounds

#128
20050070738
2005-03-31

Method for producing organic acid

#129
20050010065
2005-01-13

Method for producing (meth) acrylic acid esters of polyhydric alcohols