ClassID:

90765

C07C7/20 - CPC Classification

Classification description:

Purification; Separation; Use of additives Use of additives, e.g. for stabilisation

Recent Application in this class:
#1
20260055037
2026-02-26

STABILIZER ADDITIVES FOR PLASTIC-DERIVED SYNTHETIC FEEDSTOCK

#2
20250282698
2025-09-11

ANTIFOULANT COMPOSITIONS FOR HIGH-SEVERITY PROCESSING OF VINYLIC MONOMER STREAMS

#3
20250171387
2025-05-29

APPARATUS, COMPOSITIONS, AND METHODS FOR MAKING SOLID METHANE GAS

#4
20250019326
2025-01-16

ANTI-FOULING DISPERSANT COMPOSITION AND METHOD OF USE

#5
20230312441
2023-10-05

ABATING UNWANTED EMULSION POLYMERIZATION DURING EXTRACTIVE DISTILLATION OF CONJUGATED DIENE MONOMERS

#6
20230312440
2023-10-05

ANTIFOULANT COMPOSITIONS FOR HIGH-SEVERITY PROCESSING OF VINYLIC MONOMER STREAMS

#7
20220402836
2022-12-22

Process for the conversion of light alkanes to aromatic compounds with improved selectivity

#8
20220289648
2022-09-15

Stabilizer additives for plastic-derived synthetic feedstock

#9
20220002162
2022-01-06

METHODS AND SYSTEMS FOR PROMOTING FORMATION OF CO2 CLATHRATE HYDRATES BY THE USE OF MAGNESIUM AND OTHER ACTIVE METALS

#10
20210323897
2021-10-21

Integrated stabilizer in deisobutanizer for isomerization of hydrocarbons and product separation

#11
20210269343
2021-09-02

Anti-fouling dispersant composition and method of use

#12
20210269308
2021-09-02

CHLORINE DIOXIDE PRECURSOR AND METHODS OF USING SAME

#13
20210230083
2021-07-29

Dealkylation and Transalkylation of Heavy Aromatic Hydrocarbons

#14
20210108141
2021-04-15

Quinone methide and ammonium salt antipolymerant composition and method

#15
20200339880
2020-10-29

Oxygenated aminophenol compounds and methods for preventing monomer polymerization

#16
20200262767
2020-08-20

Method of olefin oligomerization

#17
20200199048
2020-06-25

Hydroxylated quinone antipolymerants and methods of using

#18
20200139333
2020-05-07

Fouling prevention method and method for olefin oligomerization

#19
20200101428
2020-04-02

Process and apparatus for controlling anti-foam injection using a differential pressure transmitter

#20
20200071338
2020-03-05

Cavitand compositions and methods of use thereof

#21
20200048168
2020-02-13

Efficiency of a gas conditioning system via hydrate inhibitor injection

#22
20200017656
2020-01-16

Compositions of oxygenated amines and quinone methides as antifoulants for vinylic monomers

#23
20200010386
2020-01-09

Composition for control and inhibition of polymerization of monomers, and method of use and preparation thereof

#24
20190337877
2019-11-07

Methods of inhibiting polymerization of vinyl aromatic monomers

#25
20190248718
2019-08-15

Compositions for control and inhibition of polymerization of vinyl aromatic monomers, and methods of use thereof

#26
20190241496
2019-08-08

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

#27
20190217270
2019-07-18

Metal organic frameworks and methods of making and using same

#28
20190202767
2019-07-04

Purification methods

#29
20190185763
2019-06-20

Online zeta-potential measurements for optimization of emulsion breaker dosage in ethylene plants

#30
20190144761
2019-05-16

Nitrogen-free hydrogen sulfide scavengers

#31
20190119184
2019-04-25

Stabilization and hydrogenation methods for microbial-derived olefins

#32
20190077731
2019-03-14

Methods for using nitric oxide to inhibit popcorn polymerization during butadiene processing

#33
20190031580
2019-01-31

Method of preparing butadiene

#34
20190023823
2019-01-24

Method for isomer reduction during polymerization and system for accomplishing the same

#35
20190023642
2019-01-24

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

#36
20180361319
2018-12-20

Method for improved reactive monomer production with membrane filtration

#37
20180346833
2018-12-06

Process and system for recovering natural gas liquids (NGL) from flare gas using Joule-Thomson (J-T) cooling and membrane separation

#38
20180305208
2018-10-25

CHLORINE DIOXIDE PRECURSOR AND METHODS OF USING SAME

#39
20180297916
2018-10-18

POLYMERIZATION INHIBITING SYSTEM AND POLYMERIZATION INHIBITING METHOD

#40
20180258014
2018-09-13

Polymerization inhibitor compositions

#41
20180186711
2018-07-05

Catalyst for coating surface of porous material and method of treating surface of porous material

#42
20180057740
2018-03-01

Process for preparing a polymerization inhibitor solution

#43
20170283346
2017-10-05

Stabilization and hydrogenation methods for microbial-derived olefins

#44
20170158584
2017-06-08

Quinone compounds for inhibiting monomer polymerization

#45
20160376515
2016-12-29

Systems and methods for gas hydrate slurry formation

#46
20160326446
2016-11-10

Process and system for recovering natural gas liquids (NGL) from flare gas using joule-thomson (J-T) cooling and membrane separation

#47
20160311734
2016-10-27

Methods of measuring pH in refinery streams

#48
20160304417
2016-10-20

Sterically hindered hydroquinones as antifoulants for unsaturated monomers

#49
20160289147
2016-10-06

Use of quinone methides as antipolymerants for vinylic monomers

#50
20160272586
2016-09-22

Use of stable lipophilic hydroxylamine compounds for inhibiting polymerization of vinyl monomers

#51
20160244398
2016-08-25

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

#52
20160237346
2016-08-18

Process and composition for inhibiting the polymerization of cyclopentadiene compounds

#53
20160237008
2016-08-18

Process and composition for inhibiting the polymerization of cyclopentadiene compounds

#54
20160215149
2016-07-28

Use of hydroxyacid to reduce the localized corrosion potential of low dose hydrate inhibitors

#55
20160207764
2016-07-21

Novel Methods for Storing Hydrogen in PFC Solutions

#56
20160176788
2016-06-23

Online monitoring of polymerization inhibitors for control of undesirable polymerization

#57
20160090343
2016-03-31

Methods for suppressing isomerization of olefin metathesis products

#58
20160083315
2016-03-24

Additive composition for control and inhibition of polymerization of aliphatic monomers, and methods of preparation and use thereof

#59
20160052840
2016-02-25

METHODS AND COMPOSITIONS FOR INHIBITING POLYSTYRENE FORMATION DURING STYRENE PRODUCTION

#60
20150376516
2015-12-31

Method and compositions for inhibition of naphthenic acid induced corrosion

#61
20150361013
2015-12-17

USE OF ALIPHATIC NITROSO COMPOUNDS AS INHIBITORS OF RADICAL POLYMERIZATION OF ACTIVATED VINYL MONOMERS

#62
20150225495
2015-08-13

Composition of quinone methide derivatives and amines for control and inhibition of polymerization of monomers, and method of preparation and use thereof

#63
20150218461
2015-08-06

Methods for Changing Stability of Water and Oil Emulsions

#64
20150119610
2015-04-30

Storage and stabilization of acetylene

#65
20150112105
2015-04-23

ASSESSMENT METHOD FOR HYDRATE INHIBITORS AND FORMULATION OF GAS HYDRATE INHIBITORS

#66
20150072916
2015-03-12

Linear alkylbenzenes from natural oils and methods of producing

#67
20150060727
2015-03-05

7-acetyleno quinone methide derivatives and their application as vinylic polymerization retarders

#68
20150044117
2015-02-12

Cavitand compositions and methods of use thereof

#69
20150037208
2015-02-05

Process stream decontamination systems and methods

#70
20150010648
2015-01-08

CHLORINE DIOXIDE PRECURSOR AND METHODS OF USING SAME

#71
20140378732
2014-12-25

Mitigation of catalyst inhibition in olefin polymerization

#72
20140364662
2014-12-11

Amine based additive composition for control and inhibition of polymerization of aromatic vinyl monomers, and method of use thereof

#73
20140364661
2014-12-11

METHOD AND COMPOSITION FOR REDUCING VISCOSITY OF A HYDROCARBON MIXTURE

#74
20140364660
2014-12-11

Amine and nitroxide based additive composition for control and inhibition of polymerization of styrene, and method of use thereof

#75
20140350313
2014-11-27

Additive composition for control and inhibition of polymerization of aromatic vinyl monomers, and method of use thereof

#76
20140350299
2014-11-27

Method and composition for inhibiting asphaltene deposition in a hydrocarbon mixture

#77
20140330053
2014-11-06

Hydroquinone compounds for inhibiting monomer polymerization

#78
20140316172
2014-10-23

Amine based additive composition for control and inhibition of polymerization of styrene, and method of use thereof

#79
20140296594
2014-10-02

PROCESS FOR THE FLUID CATALYTIC CRACKING OF OXYGENATED HYDROCARBON COMPOUNDS FROM BIOLOGICAL ORIGIN

#80
20140288337
2014-09-25

Process and composition for inhibiting the polymerization of cyclopentadiene compounds

#81
20140256998
2014-09-11

ADDITIVE FOR PRESERVING THE FLUIDITY OF FLUIDS CONTAINING GAS HYDRATES

#82
20140243564
2014-08-28

METHOD FOR INHIBITING FOULING IN BASIC WASHING SYSTEMS

#83
20140234427
2014-08-21

USE OF SYNTHETIC JANUS PARTICLES FOR PREVENTING OR REDUCING CRYSTAL GROWTH

#84
20140228604
2014-08-14

Online monitoring of polymerization inhibitors for control of undesirable polymerization

#85
20140206585
2014-07-24

Substituted diarylamines and use of same as antioxidants

#86
20140194559
2014-07-10

Novel Inhibitor Compositions and Methods of Use

#87
20140121399
2014-05-01

Quinone compounds for inhibiting monomer polymerization

#88
20130338389
2013-12-19

Ionic liquids for separation of olefin-paraffin mixtures

#89
20130310617
2013-11-21

Stabilization and hydrogenation methods for microbial-derived olefins

#90
20130296618
2013-11-07

Nano-carbon Antifoulant Materials

#91
20130237736
2013-09-12

Method for producing alpha-methyl styrene from cumene

#92
20130217930
2013-08-22

Use of Self-Crosslinked Siloxanes for the Defoaming of Liquid Hydrocarbons

#93
20130211159
2013-08-15

METHOD FOR DEGASSING A STORAGE TANK FOR LIQUID PRODUCTS CONTAINING VOLATILE ORGANIC COMPOUNDS, IN PARTICULAR PETROLEUM PRODUCTS

#94
20130204053
2013-08-08

Methods and compositions for styrene inhibition via in situ generation of quinone methides

#95
20130165708
2013-06-27

Methods for suppressing isomerization of olefin metathesis products

#96
20130165707
2013-06-27

Methods for suppressing isomerization of olefin metathesis products

#97
20130165706
2013-06-27

Methods for suppressing isomerization of olefin metathesis products

#98
20130158203
2013-06-20

Compositions and method of inhibiting polymerization of vinyl-aryl monomers

#99
20130116486
2013-05-09

Retarder composition

#100
20130098466
2013-04-25

Circulation aid for primary fractional quench loops

#101
20130096354
2013-04-18

Process for treating heavy oils

#102
20130072729
2013-03-21

Methods and compositions for inhibiting polystyrene formation during styrene production

#103
20130048079
2013-02-28

Liquid crude hydrocarbon composition

#104
20130030225
2013-01-31

METHODS AND COMPOSITIONS FOR INHIBITING VINYL AROMATIC MONOMER POLYMERIZATION

#105
20120316369
2012-12-13

Synergistic combination for inhibiting polymerization of vinyl monomers

#106
20120313036
2012-12-13

Synthesis of 7-acetyleno quinone methide derivatives and their application as vinylic polymerization retarders

#107
20120280174
2012-11-08

Method of inhibiting free radical polymerization of styrene

#108
20120264985
2012-10-18

Process for inhibiting polymerization of an aromatic vinyl compound

#109
20120244228
2012-09-27

Chlorine dioxide precursor and methods of using same

#110
20120219714
2012-08-30

STABILIZATION OF BICYCLOHEPTADIENE

#111
20120217444
2012-08-30

COMPOSITION AND METHOD FOR INHIBITING PREMATURE POLYMERIZATION

#112
20120203020
2012-08-09

Multi-component polymerization inhibitors for ethylenically unsaturated monomers

#113
20120190893
2012-07-26

Tertiary amine salt additives for hydrate control

#114
20120172604
2012-07-05

Oxazolidinium compounds

#115
20120142975
2012-06-07

Method for producing aryl, heteroaryl, or alkenyl-substituted unsaturated hydrocarbon

#116
20120101295
2012-04-26

Process for stabilizing olefinically unsaturated monomers

#117
20120078021
2012-03-29

Anti-agglomerate gas hydrate inhibitors for use in petroleum and natural gas systems

#118
20120016097
2012-01-19

Olefin oligomerization reaction processes exhibiting reduced fouling

#119
20110297878
2011-12-08

Methods and compositions for inhibiting vinyl aromatic monomer polymerization

#120
20110259242
2011-10-27

Additives to prevent degradation of cyclic alkene derivatives

#121
20110218371
2011-09-08

Stabilizers for the stabilization of unsaturated hydrocarbon-based precursor

#122
20110152130
2011-06-23

Dual Function Gas Hydrate Inhibitors

#123
20110137094
2011-06-09

PROCESS FOR PRODUCING ETHYLIDENE NORBORNENE

#124
20110136700
2011-06-09

Method and system for preventing clathrate hydrate blockage formation in flow lines by enhancing water cut

#125
20110091651
2011-04-21

Additives to prevent degradation of cyclic alkene derivatives

#126
20110015462
2011-01-20

Methods for inhibiting polymerization of vinyl aromatic compounds during extractive distillation

#127
20110015461
2011-01-20

Ionic liquids for separation of olefin-paraffin mixtures

#128
20100267971
2010-10-21

Stabilization methods for microbial-derived olefins

#129
20100168434
2010-07-01

INHIBITION OF POLYMERISATION

#130
20100143580
2010-06-10

Stabilization of Bicycloheptadiene

#131
20100140144
2010-06-10

Method and apparatus for reducing additives in a hydrocarbon stream

#132
20100130747
2010-05-27

Oxazolidinium compounds and use as hydrate inhibitors

#133
20100127218
2010-05-27

Aromatic sulfonic acids, amines and nitrophenols in combination with nitroxyl radical-containing compounds or C-nitrosoanilines as polymerization inhibitors

#134
20090297711
2009-12-03

Process stability of NBDE using substituted phenol stabilizers

#135
20090291210
2009-11-26

Additives to prevent degradation of cyclic alkene derivatives

#136
20090287032
2009-11-19

Method for producing dienes by hydrodimerization

#137
20090240092
2009-09-24

ORTHO-NITROSOPHENOLS AS POLYMERIZATION INHIBITORS

#138
20090221860
2009-09-03

Transport of ethyne in form of α-alkynols as ethyne precursors

#139
20090176686
2009-07-09

Stabilizer for organic solvents

#140
20090159844
2009-06-25

Stabilizers for the stabilization of unsaturated hydrocarbon-based precursor

#141
20090159843
2009-06-25

Stabilizers for the stabilization of unsaturated hydrocarbon-based precursor

#142
20090149682
2009-06-11

Process for inhibiting polymerization of an aromatic vinyl compound

#143
20090114879
2009-05-07

Additive for preserving the fluidity of fluids containing gas hydrates

#144
20090114878
2009-05-07

Process for stabilizing olefinically unsaturated monomers

#145
20080293860
2008-11-27

Branched olefin compositions

#146
20080217211
2008-09-11

Process for treating heavy oils

#147
20080200616
2008-08-21

Method of Inhibiting Polymerization Giving Copolymer of Divinylbenzene and Aromatic Vinyl Compound

#148
20080119656
2008-05-22

Oxazolidinium compounds and use as hydrate inhibitors

#149
20080001125
2008-01-03

Method and compositions for inhibition of naphthenic acid induced corrosion

#150
20070282150
2007-12-06

Alkylation of isobutene feeds

#151
20070208204
2007-09-06

POLYMERIZATION INHIBITOR FOR STABILIZING OLEFINICALLY UNSATURATED MONOMERS

#152
20070173672
2007-07-26

Additives for inhibiting gas hydrate formation

#153
20070057235
2007-03-15

Additives to prevent degradation of cyclic alkene derivatives

#154
20070057234
2007-03-15

Additives to prevent degradation of cyclic alkene derivatives

#155
20060283699
2006-12-21

Ortho-nitrosophenols as polymerization inhibitors

#156
20060211905
2006-09-21

Olefinic metathesis in the presence of phenolic compounds

#157
20060178489
2006-08-10

Means for controlling the exothermic reaction of styrenic monomers with sulfonic acids

#158
20060163539
2006-07-27

Polymerization inhibitor for aromatic vinyl compounds and method for inhibiting the polymerization of the compounds

#159
20060155140
2006-07-13

Blends of quinone alkide and nitroxyl compounds as polymerization inhibitors

#160
20060122341
2006-06-08

Aromatic sulfonic acids, amines, and nitrophenols in combination with nitroxyl radical-containing compounds or C-nitrosanilines as polymerization inhibitors

#161
20060069219
2006-03-30

Sulfonated phenols with nitrophenols as polymerization inhibitors

#162
20060069218
2006-03-30

Sulfonated nitrophenols as polymerization inhibitors

#163
20060020089
2006-01-26

Method for stabilizing vinyl aromatic monomers using selected polymerization inhibitors and polymers prepared

#164
20060009663
2006-01-12

Reducing metal corrosion of hydrocarbons using acidic fischer-tropsch products

#165
20050261529
2005-11-24

Enhancement modifiers for gas hydrate inhibitors

#166
20050137432
2005-06-23

Method and system for preventing clathrate hydrate blockage formation in flow lines by enhancing water cut

#167
20050090703
2005-04-28

Continuous recovery of styrene from a styrene-containing mixture

#168
20050027150
2005-02-03

Polymerization inhibitor for styrene dehydrogenation units

#169
20050004413
2005-01-06

Process and apparatus for separation and purification of conjugated diene

#170
19242597
2025-10-21

Catalytic method for acrylate production

#171
18393534
2025-01-28

Apparatus, compositions, and methods for making solid methane gas