ClassID:

86281

C02F1/5272 - CPC Classification

Classification description:

Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants

Recent Application in this class:
#1
20260138899
2026-05-21

COAL-DUST WATER FLOCCULANT USING CHITOSAN

#2
20260049011
2026-02-19

COMPOSITIONS AND METHODS FOR CONTROLLING SLUDGE BED PROPERTIES AND IMPROVING LIME SOFTENING PROCESS EFFICIENCY

#3
20250382206
2025-12-18

NONAQUEOUS SUSPENSIONS, METHODS AND SYSTEMS FOR TREATMENT OF WASTEWATER

#4
20250346509
2025-11-13

FLOCCULANT FOR TREATING FRACTURING FLOWBACK FLUID AND PREPARATION METHOD THEREFOR

#5
20250256998
2025-08-14

THE CONTROL OF CONTINUOUS WATER TREATMENT

#6
20250162911
2025-05-22

METHODS OF DEWATERING WASTE STREAMS CONTAINING ENTRAINED PARTICLES

#7
20250115504
2025-04-10

SYSTEM FOR TREATING PRODUCED WATER RESULTING FROM OIL EXTRACTION AND PNEUMATIC FLOCCULATION METHOD BY INJECTION OF INERT GAS INTO HEAT EXCHANGERS

#8
20250115498
2025-04-10

TWO-STAGE SYSTEM AND METHOD FOR TREATING FLUORIDE-CONTAINING WASTEWATER

#9
20250074804
2025-03-06

METHOD AND APPARATUS FOR TREATING WASTEWATER

#10
20250073673
2025-03-06

NANONETS FOR REMOVAL OF CONTAMINANTS FROM AQUEOUS SOLUTIONS, KITS THEREFOR AND METHODS OF THEIR USE

#11
20250042782
2025-02-06

RAPID AND EFFICIENT PFAS EXTRACTION BY BIOCOMPATIBLE POLYMER COACERVATE ADSORBENTS FOR WATER TREATMENT

#12
20250019279
2025-01-16

TREATMENT OF TAILINGS

#13
20250003097
2025-01-02

ELECTROCHEMICAL CELL DEIONIZATION SYSTEM

#14
20240417290
2024-12-19

Compositions and Methods for Flocculation

#15
20240327259
2024-10-03

Combination of Cationic Polyacrylamide and Xanthan as Flocculation Agents for Harmful Algal Blooms

#16
20240199455
2024-06-20

REMOVAL OF TOXIC OXYANIONS BY CO-CRYSTALLIZATION WITH SULFATE

#17
20240132382
2024-04-25

FIBER-BASED MATERIALS FOR WATER TREATMENT

#18
20240034822
2024-02-01

CATIONIC POLYACRYLAMIDES WITH MICRO-BLOCK STRUCTURE

#19
20240034651
2024-02-01

METHOD FOR GELATION OF A WASTE WATER STREAM

#20
20230416123
2023-12-28

COAGULATING AGENT OF PLANT ORIGIN FOR WATER TREATMENT

#21
20230406736
2023-12-21

METHOD OF FLOCULATION USING A METAL-ORGANIC-FRAMEWORK

#22
20230286842
2023-09-14

COMPOSITIONS AND METHODS FOR TREATING AQUARIUM WATER

#23
20230265037
2023-08-24

METHOD FOR MANUFACTURING MONO CALCIUM CITRATE BY USING SHELL AND APPLICATION THEREOF

#24
20230249995
2023-08-10

WATER TREATMENT AGENT

#25
20230242423
2023-08-03

Extract of plant powder, and water purifier

#26
20230174397
2023-06-08

Methods for the Formation of Nanoplastics and the Agglomeration/Removal of Micro- and Nanoplastics in Water

#27
20230070956
2023-03-09

FLOCULANT FORMULATION BASED ON CHITOSAN COMPATIBLE WITH DISINFECTION PRODUCTS AND METHOD OF PREPARATION

#28
20230035776
2023-02-02

Nanonets for removal of contaminants from aqueous solutions, kits therefor and methods of their use

#29
20220363575
2022-11-17

Enhanced coagulation method for removing microplastics in water

#30
20220177334
2022-06-09

Use of multiple charged ionic compounds derived from polyamines for waste water clarification

#31
20220089530
2022-03-24

Method for the purification of acrylamido-2-methyl-2-propanesulphonic acid

#32
20220081333
2022-03-17

METHOD OF CONTROLLING SCALE IN AQUEOUS SYSTEMS

#33
20220017391
2022-01-20

METHOD FOR TREATING SUSPENSIONS OF SOLID PARTICLES IN WATER USING AMPHOTERIC POLYMERS

#34
20210380444
2021-12-09

Extract of plant powder, and water purifier

#35
20210355004
2021-11-18

Method for dewatering or removing solids, including corn solids, via flocculation from an alkaline aqueous solution, including nejayote, generated in the process of nixtamalization of corn by introducing a source of carbonate to the aqueous solution, followed by adding an anionic and then a cationic flocculent to the aqueous solution.

#36
20210331951
2021-10-28

Method for gelation of a waste water stream

#37
20210269332
2021-09-02

Method for treating aqueous effluent

#38
20210260603
2021-08-26

Iron chelators as activators in alkaline flotation circuits

#39
20210178293
2021-06-17

Rake-free thickening device including driving area

#40
20210171370
2021-06-10

Methods of removing polymers from treatment fluids for use in subterranean formations

#41
20210139340
2021-05-13

Method for efficiently separating magnesium and lithium from salt lake brine and simultaneously preparing high-purity magnesium oxide and battery-grade lithium carbonate

#42
20210024385
2021-01-28

Method and treatment system for treating mineral or oil sands tailings

#43
20210017052
2021-01-21

Methods and systems for treating an aqueous solution

#44
20200392070
2020-12-17

Cationic quaternary ammonium compounds and compositions comprising same and processes for their manufacture

#45
20200377671
2020-12-03

Ethoxylated pentaerythritol core hyperbranched polymer with dithiocarboxylate as side group and terminal group and applications of chelating heavy metals

#46
20200262719
2020-08-20

IN SITU REMEDIATION OF PFAS-CONTAMINATED GROUNDWATER

#47
20200223719
2020-07-16

Method and system for optimization of coagulation and/or flocculation in a water treatment process

#48
20200156970
2020-05-21

Methods and compositions for removing contaminants from wastewater streams

#49
20200123032
2020-04-23

Treating seawater for oilfield operations

#50
20200071205
2020-03-05

Use of multiple charged ionic compounds derived from poly amines for waste water clarification

#51
20200048115
2020-02-13

Treatment method for organic wastewater and use of same

#52
20190375665
2019-12-12

SLUDGE DEHYDRATING AGENT AND SLUDGE DEHYDRATING METHOD

#53
20190367389
2019-12-05

Method and treatment system for treating mineral or oil sands tailings

#54
20190359624
2019-11-28

Sorbitol based gelators and method thereof

#55
20190359503
2019-11-28

Water purification dispersion, production method for water purification dispersion, and waste water treatment method

#56
20190337825
2019-11-07

Treatment of tailings

#57
20190330517
2019-10-31

Multiphase polymer suspension and use thereof

#58
20190276345
2019-09-12

PROCESS FOR TAILINGS REMEDIATION

#59
20190256387
2019-08-22

EXTRACT OF PLANT POWDER, AND WATER PURIFIER

#60
20190233313
2019-08-01

Process for treatment of aqueous effluent

#61
20190233310
2019-08-01

ACOUSTIC MIXING FOR FLOCCULANT ADDITION TO MINERAL SUSPENSIONS

#62
20190194044
2019-06-27

Method for in-situ harmless treatment of cyanophycean accumulation and suspended solids in lakeside wetlands

#63
20190169053
2019-06-06

Water-Soluble Encapsulated Clarifying Agent

#64
20190152813
2019-05-23

Method for production of potable water

#65
20190010118
2019-01-10

Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture

#66
20180346354
2018-12-06

Method and Composition for Moving Phosphates from Water

#67
20180230029
2018-08-16

Polysaccharide agents and methods of their use for removing solids from water

#68
20180208489
2018-07-26

Method for detecting and controlling the amount of cationic species in a water stream

#69
20180134655
2018-05-17

GUANIDINE COMPOUNDS FOR REMOVAL OF OXYANIONS FROM AQUEOUS SOLUTIONS AND FOR CARBON DIOXIDE CAPTURE

#70
20180111857
2018-04-26

Water cleaning agent and water cleaning method

#71
20180099884
2018-04-12

Effluent treatment mixture

#72
20180021700
2018-01-25

INORGANIC PARTICLE POLYMER HYBRIDS AND USES THEREOF

#73
20170225978
2017-08-10

REMOVAL OF HYDRATE INHIBITORS FROM WASTE STREAMS

#74
20170210641
2017-07-27

BIOSORBENTS FOR REMOVAL OF CONTAMINANTS FROM WASTE/OIL SAND PROCESS-AFFECTED WATER (OSPW) AND CONSOLIDATION OF OIL SANDS TAILINGS

#75
20170197853
2017-07-13

Process for removal of anion from aqueous solution

#76
20170107126
2017-04-20

DISPERSANT FOR WATER TREATMENT AND WATER TREATMENT METHOD

#77
20170081223
2017-03-23

TREATING SEAWATER FOR OILFIELD OPERATIONS

#78
20170073254
2017-03-16

SYSTEMS AND METHODS FOR REMOVING FINELY DISPERSED PARTICULATE MATTER FROM A FLUID STREAM

#79
20160369030
2016-12-22

Structured block copolymers

#80
20160347631
2016-12-01

TANNIN-BASED POLYMER AS FILTER AID FOR REDUCING FOULING IN FILTRATION OF HIGH TDS WATER

#81
20160289794
2016-10-06

Treatment method for solution containing metal ions using cation adsorbent

#82
20160264869
2016-09-15

Coal upgrade plant and method for manufacturing upgraded coal

#83
20160060145
2016-03-03

CHELATING AGENT, AND SCALE INHIBITOR, DETERGENT AND WATER TREATMENT METHOD

#84
20160046506
2016-02-18

Method for removing fluorinated organic compounds from contaminated fluids, and adsorbent component and adsorbent kit used therefor

#85
20160002077
2016-01-07

Perchlorate removal from aqueous industrial liquids

#86
20150345164
2015-12-03

System and method for maintaining water quality in large water bodies

#87
20150345024
2015-12-03

Method for regenerating plating solution

#88
20150336823
2015-11-26

NUTRIENT RECOVERY METHODS AND USES THEREOF

#89
20150259232
2015-09-17

Treatment of produced water concentrate

#90
20150252658
2015-09-10

Produced water treatment and solids precipitation from thermal treatment blowdown

#91
20150218021
2015-08-06

Methods and compositions for removing phosphates from water

#92
20150211091
2015-07-30

Silver recovery methods and silver products produced thereby

#93
20150203385
2015-07-23

DEWATERING OF THICK FINE TAILINGS WITH GAS INJECTION AND FLOCCULATION

#94
20150191368
2015-07-09

Polysaccharide microgels for cleaning water of petroleum and petroleum products and method for using same (variants)

#95
20150166361
2015-06-18

System and method for maintaining water quality in large water bodies

#96
20150158749
2015-06-11

Selective extraction of anions from solution

#97
20150151990
2015-06-04

TRANSPORTATION OF FLOCCULATED TAILINGS IN A PIPELINE

#98
20150144573
2015-05-28

Consolidation and dewatering of particulate matter with protein

#99
20150129506
2015-05-14

Depressants for use in separation processes

#100
20150053623
2015-02-26

Particle suspensions of flocculating polymer powders

#101
20150053622
2015-02-26

Method to treat flushing liquor systems in coke plants

#102
20150044733
2015-02-12

Method to separate lignin-rich solid phase from acidic biomass suspension at an acidic pH

#103
20150034563
2015-02-05

ENHANCEMENT OF WASTEWATER SLUDGE DEWATERING USING SOY FLOUR OR SOY PROTEIN

#104
20150008186
2015-01-08

Process for removal of radioactive contamination from wastewater

#105
20140378676
2014-12-25

Nanofibrillar cellulose as a phase separation agent

#106
20140353257
2014-12-04

Compositions for water treatment and methods of using thereof

#107
20140263082
2014-09-18

Polymer blends for flocculation

#108
20140263079
2014-09-18

Wastewater treatment system and method

#109
20140251921
2014-09-11

Composition and processfor removing impurities from a circulating water system

#110
20140238943
2014-08-28

Method For Treating Suspensions Of Solid Particles In Water Using Post Hydrolyzed Polymers

#111
20140197112
2014-07-17

POTABILISATION METHOD

#112
20140197110
2014-07-17

PROCESS AND PLANT FOR DECONTAMINATING PHOSPHORIC ACID SOLUTION

#113
20140190898
2014-07-10

Cactus mucilage and ferric ions for the removal of arsenate (As(V)) from water

#114
20140166586
2014-06-19

Lysine-based polymer coagulants for use in clarification of process waters

#115
20140158634
2014-06-12

Polymer blends for flocculation

#116
20140158633
2014-06-12

Particle suspensions of flocculating polymer powders and powder flocculant polymer blends

#117
20140158616
2014-06-12

SYSTEMS, APPARATUS, AND METHODS FOR SEPARATING SALTS FROM WATER

#118
20140144842
2014-05-29

Methods to recover and reclaim hydrocarbons or hydrophobic substances in an aqueous environment

#119
20140144815
2014-05-29

Composition and method for improvement in froth flotation

#120
20140131284
2014-05-15

Functionalized cationic polyamines and their use to reduce the NDMA formation during the treatment of aqueous systems, and applications in the water treatment industry, including wastewater and drinking water treatment processes

#121
20140124454
2014-05-08

Water treatment composition and method of using same

#122
20140124453
2014-05-08

Chemical co-precipitation process for recovery of flow-back water, produced water and wastewater of similar characteristics

#123
20140124452
2014-05-08

METHODS FOR REMOVING MERCURY FROM WASTEWATER STREAMS

#124
20140076810
2014-03-20

Systems and methods for use of water with switchable ionic strength

#125
20140069866
2014-03-13

METHODS AND COMPOSITIONS FOR REMOVING PHOSPHATES FROM WATER

#126
20140042100
2014-02-13

Method for pretreatment of wastewater and recreational water with nanocomposites

#127
20140030797
2014-01-30

Utilization of ferric ammonium citrate for in situ remediation of chlorinated solvents

#128
20130343972
2013-12-26

Process for treating liquid effluents and recovering metals

#129
20130140234
2013-06-06

Antisolvent process for treating liquids that include high total dissolved solids

#130
20130015143
2013-01-17

NON-DESTRUCTIVE METHOD FOR ALGAE CONTAMINATED WATER TREATMENT AND ALGAE HARVEST OR REMOVAL

#131
20130015139
2013-01-17

Composition and system for treating paint spray booth water

#132
20120074058
2012-03-29

NUTRIENT RECOVERY METHODS AND USES THEREOF

#133
20120029120
2012-02-02

SYSTEMS AND METHODS FOR REMOVING FINELY DISPERSED PARTICULATE MATTER FROM A FLUID STREAM

#134
20110315637
2011-12-29

Methods to recover and reclaim hydrocarbons or hydrophobic substances in an aqueous environment

#135
20110284471
2011-11-24

Alginate improvement

#136
20110257435
2011-10-20

FUNCTIONALIZED CATIONIC POLYAMINES AND THEIR USE TO REDUCE THE NDMA FORMATION DURING THE TREATMENT OF AQUEOUS SYSTEMS, AND APPLICATIONS IN THE WATER TREATMENT INDUSTRY, INCLUDING WASTEWATER AND DRINKING WATER TREATMENT PROCESSES

#137
20110240131
2011-10-06

System and method for scale inhibition

#138
20110139714
2011-06-16

PROCESS FOR REDUCING BULKING SLUDGE IN ACTIVATED SLUDGE WASTEWATER TREATMENT

#139
20110108480
2011-05-12

Purification of oil sands pond water

#140
20110094963
2011-04-28

MEMBRANE SEPARATION METHOD AND MEMBRANE SEPARATION DEVICE

#141
20100294725
2010-11-25

Azetidinium-functional polysaccharides and uses thereof

#142
20100193467
2010-08-05

METHOD FOR THE TREATMENT AND REUSE OF A STRIPPER SOLUTION

#143
20100108616
2010-05-06

CHEMICAL COMPOSITION AND PROCESS FOR TREATING GEOTECHNICAL SLURRIES

#144
20090105355
2009-04-23

Flocculant for separating and flocculating oil and water

#145
20090095678
2009-04-16

PURIFICATION OF OIL SANDS POND WATER

#146
20080283470
2008-11-20

Wastewater mercury removal process

#147
20070205159
2007-09-06

Method for treating acidic waters using recycled acidic and basic sludges

#148
20070084800
2007-04-19

Use of amino acid and carbohydrate polymers in soil retention, water conservation, and water clarification

#149
20070062865
2007-03-22

Novel biological flocculants and production methods

#150
20060276597
2006-12-07

High molecular weight polymers containing pendant salicylic acid groups for clarifying bayer process liquors

#151
20060273040
2006-12-07

High molecular weight polymers containing pendant salicylic acid groups for clarifying Bayer process liquors

#152
20060124553
2006-06-15

Method of preventing or reducing aluminosilicate scale in high level nuclear wastes

#153
20060070952
2006-04-06

Charge-based water filtration systems

#154
19051404
2025-11-11

Flocculant for treating fracturing flowback fluid and preparation method therefor

#155
18336975
2023-10-24

Vacuum-flocculation-solidification integrated apparatus for waste mud and using method thereof

#156
15732033
2019-11-05

Treatment of produced water from unconventional sources of hydrocarbons

#157
15731637
2019-10-15

Vertical integration of source water treatment

#158
14518310
2015-06-09

Separation of biocomponents from DDGS