CA1085522A - Process for clarifying raw water - Google Patents

Process for clarifying raw water

Info

Publication number: CA1085522A
Authority: CA; Canada
Prior art keywords: polymer; groups; water; modified; chemically
Prior art date: 1976-10-26
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

CA286,634A

Other languages

English (en)

French (fr)

Inventor

Anthony T. Coscia

Michael N.D. O'connor

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Wyeth Holdings LLC

Original Assignee

American Cyanamid Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1976-10-26

Filing date

1977-09-13

Publication date

1980-09-09

1977-05-02 Priority claimed from US05/792,746 external-priority patent/US4137165A/en

1977-09-13 Application filed by American Cyanamid Co filed Critical American Cyanamid Co

1980-09-09 Application granted granted Critical

1980-09-09 Publication of CA1085522A publication Critical patent/CA1085522A/en

Status Expired legal-status Critical Current

Links

XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
238000000034 method Methods 0.000 title claims abstract description 26
230000008569 process Effects 0.000 title claims abstract description 19
229920002401 polyacrylamide Polymers 0.000 claims abstract description 33
238000005352 clarification Methods 0.000 claims abstract description 16
125000006222 dimethylaminomethyl group Chemical group [H]C([H])([H])N(C([H])([H])[H])C([H])([H])* 0.000 claims abstract description 10
HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 25
239000007787 solid Substances 0.000 claims description 11
239000000725 suspension Substances 0.000 claims description 9
238000005956 quaternization reaction Methods 0.000 claims description 7
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
229910003480 inorganic solid Inorganic materials 0.000 claims description 6
VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 claims description 5
239000002245 particle Substances 0.000 claims description 5
229940100198 alkylating agent Drugs 0.000 claims description 4
239000002168 alkylating agent Substances 0.000 claims description 4
125000003368 amide group Chemical group 0.000 claims description 4
238000002156 mixing Methods 0.000 claims description 4
239000011780 sodium chloride Substances 0.000 claims description 3
NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 claims 1
229920000642 polymer Polymers 0.000 description 67
WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 25
ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 21
239000000047 product Substances 0.000 description 14
238000007385 chemical modification Methods 0.000 description 13
238000006116 polymerization reaction Methods 0.000 description 13
239000000243 solution Substances 0.000 description 13
238000012360 testing method Methods 0.000 description 13
239000003795 chemical substances by application Substances 0.000 description 12
229940117913 acrylamide Drugs 0.000 description 11
239000008394 flocculating agent Substances 0.000 description 11
239000000178 monomer Substances 0.000 description 10
KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
229960004279 formaldehyde Drugs 0.000 description 8
235000019256 formaldehyde Nutrition 0.000 description 8
238000006243 chemical reaction Methods 0.000 description 7
239000003643 water by type Substances 0.000 description 7
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
238000005189 flocculation Methods 0.000 description 6
230000016615 flocculation Effects 0.000 description 6
238000002360 preparation method Methods 0.000 description 6
DNLZVNZIAOXDTF-UHFFFAOYSA-N 2-[(dimethylamino)methyl]prop-2-enamide Chemical compound CN(C)CC(=C)C(N)=O DNLZVNZIAOXDTF-UHFFFAOYSA-N 0.000 description 5
239000005995 Aluminium silicate Substances 0.000 description 5
235000012211 aluminium silicate Nutrition 0.000 description 5
239000007864 aqueous solution Substances 0.000 description 5
239000003999 initiator Substances 0.000 description 5
NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 5
239000010865 sewage Substances 0.000 description 5
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
239000008367 deionised water Substances 0.000 description 4
229910021641 deionized water Inorganic materials 0.000 description 4
229920006158 high molecular weight polymer Polymers 0.000 description 4
101100410784 Arabidopsis thaliana PXG3 gene Proteins 0.000 description 3
KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
239000002250 absorbent Substances 0.000 description 3
230000002745 absorbent Effects 0.000 description 3
125000002091 cationic group Chemical group 0.000 description 3
239000007795 chemical reaction product Substances 0.000 description 3
239000000460 chlorine Substances 0.000 description 3
229910052801 chlorine Inorganic materials 0.000 description 3
239000004927 clay Substances 0.000 description 3
230000000694 effects Effects 0.000 description 3
239000012535 impurity Substances 0.000 description 3
229910052757 nitrogen Inorganic materials 0.000 description 3
238000012545 processing Methods 0.000 description 3
238000010992 reflux Methods 0.000 description 3
239000000126 substance Substances 0.000 description 3
239000006228 supernatant Substances 0.000 description 3
CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
NJSSICCENMLTKO-HRCBOCMUSA-N [(1r,2s,4r,5r)-3-hydroxy-4-(4-methylphenyl)sulfonyloxy-6,8-dioxabicyclo[3.2.1]octan-2-yl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)O[C@H]1C(O)[C@@H](OS(=O)(=O)C=2C=CC(C)=CC=2)[C@@H]2OC[C@H]1O2 NJSSICCENMLTKO-HRCBOCMUSA-N 0.000 description 2
NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
238000013019 agitation Methods 0.000 description 2
229910001870 ammonium persulfate Inorganic materials 0.000 description 2
229920006317 cationic polymer Polymers 0.000 description 2
150000001768 cations Chemical class 0.000 description 2
239000012986 chain transfer agent Substances 0.000 description 2
239000002738 chelating agent Substances 0.000 description 2
NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
-1 dimethylamino- Chemical class 0.000 description 2
229960001484 edetic acid Drugs 0.000 description 2
239000008098 formaldehyde solution Substances 0.000 description 2
229920001519 homopolymer Polymers 0.000 description 2
150000002500 ions Chemical class 0.000 description 2
239000007788 liquid Substances 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
239000000463 material Substances 0.000 description 2
125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
239000000203 mixture Substances 0.000 description 2
238000012986 modification Methods 0.000 description 2
230000004048 modification Effects 0.000 description 2
239000013049 sediment Substances 0.000 description 2
PQTJTWAPYYBPNO-UHFFFAOYSA-N (2-bromobenzoyl) 2-bromobenzenecarboperoxoate Chemical compound BrC1=CC=CC=C1C(=O)OOC(=O)C1=CC=CC=C1Br PQTJTWAPYYBPNO-UHFFFAOYSA-N 0.000 description 1
SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
XUKUURHRXDUEBC-KAYWLYCHSA-N Atorvastatin Chemical compound C=1C=CC=CC=1C1=C(C=2C=CC(F)=CC=2)N(CC[C@@H](O)C[C@@H](O)CC(O)=O)C(C(C)C)=C1C(=O)NC1=CC=CC=C1 XUKUURHRXDUEBC-KAYWLYCHSA-N 0.000 description 1
239000004342 Benzoyl peroxide Substances 0.000 description 1
OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
230000009471 action Effects 0.000 description 1
230000002411 adverse Effects 0.000 description 1
125000000217 alkyl group Chemical group 0.000 description 1
150000001408 amides Chemical class 0.000 description 1
150000001412 amines Chemical class 0.000 description 1
125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 1
229920006318 anionic polymer Polymers 0.000 description 1
150000001450 anions Chemical class 0.000 description 1
238000013459 approach Methods 0.000 description 1
239000007900 aqueous suspension Substances 0.000 description 1
235000019400 benzoyl peroxide Nutrition 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
239000001569 carbon dioxide Substances 0.000 description 1
229910002092 carbon dioxide Inorganic materials 0.000 description 1
239000008395 clarifying agent Substances 0.000 description 1
239000000701 coagulant Substances 0.000 description 1
230000002301 combined effect Effects 0.000 description 1
230000000052 comparative effect Effects 0.000 description 1
150000001875 compounds Chemical class 0.000 description 1
238000001816 cooling Methods 0.000 description 1
229910052802 copper Inorganic materials 0.000 description 1
239000010949 copper Substances 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
229910001448 ferrous ion Inorganic materials 0.000 description 1
230000003311 flocculating effect Effects 0.000 description 1
IKZUTTBMFIUNNV-UHFFFAOYSA-N formaldehyde N-methylmethanamine Chemical compound C=O.CNC IKZUTTBMFIUNNV-UHFFFAOYSA-N 0.000 description 1
FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
229940050176 methyl chloride Drugs 0.000 description 1
JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 description 1
OOUWNHAYYDNAOD-UHFFFAOYSA-N n-[(dimethylamino)methyl]prop-2-enamide Chemical group CN(C)CNC(=O)C=C OOUWNHAYYDNAOD-UHFFFAOYSA-N 0.000 description 1
229940045681 other alkylating agent in atc Drugs 0.000 description 1
JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
230000000135 prohibitive effect Effects 0.000 description 1
238000010526 radical polymerization reaction Methods 0.000 description 1
150000003254 radicals Chemical class 0.000 description 1
239000000376 reactant Substances 0.000 description 1
230000036647 reaction Effects 0.000 description 1
230000009257 reactivity Effects 0.000 description 1
150000003839 salts Chemical class 0.000 description 1
238000000926 separation method Methods 0.000 description 1
238000004088 simulation Methods 0.000 description 1
239000010802 sludge Substances 0.000 description 1
239000011734 sodium Substances 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
239000002904 solvent Substances 0.000 description 1
238000001179 sorption measurement Methods 0.000 description 1
150000003512 tertiary amines Chemical group 0.000 description 1
CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
239000002699 waste material Substances 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/44—Preparation of metal salts or ammonium salts

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
Health & Medical Sciences (AREA)
Medicinal Chemistry (AREA)
Polymers & Plastics (AREA)
General Chemical & Material Sciences (AREA)
Life Sciences & Earth Sciences (AREA)
Hydrology & Water Resources (AREA)
Engineering & Computer Science (AREA)
Environmental & Geological Engineering (AREA)
Water Supply & Treatment (AREA)
Separation Of Suspended Particles By Flocculating Agents (AREA)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

CA286,634A 1976-10-26 1977-09-13 Process for clarifying raw water Expired CA1085522A (en)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
US73557776A	1976-10-26	1976-10-26
US735,577		1976-10-26
US792,746		1977-05-02
US05/792,746 US4137165A (en)	1976-10-26	1977-05-02	Process for clarifying raw water

Publications (1)

Publication Number	Publication Date
CA1085522A true CA1085522A (en)	1980-09-09

Family

ID=27112915

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA286,634A Expired CA1085522A (en)	1976-10-26	1977-09-13	Process for clarifying raw water

Country Status (10)

Country	Link
JP (1)	JPS5389255A (it)
AU (1)	AU515197B2 (it)
BR (1)	BR7707091A (it)
CA (1)	CA1085522A (it)
DE (1)	DE2746102A1 (it)
ES (1)	ES463547A1 (it)
FR (1)	FR2369215A1 (it)
GB (1)	GB1588342A (it)
IT (1)	IT1090037B (it)
NL (1)	NL7711749A (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB8512937D0 (en) *	1985-05-22	1985-06-26	Allied Colloids Ltd	Water treatment
JP2750525B2 (ja) *	1988-05-31	1998-05-13	三菱レイヨン株式会社	帯電防止剤の製造方法及びメタクリル樹脂組成物
US5178774A (en) *	1990-06-29	1993-01-12	Allied Colloids Limited	Purification of aqueous liquor
US5627260A (en) *	1993-02-12	1997-05-06	Cytec Technology Corp.	Quaternized tertiary aminomethyl acrylamide polymer microemulsions with improved performance
CN115784358B (zh) *	2022-11-28	2023-07-11	嘉兴沃特泰科环保科技股份有限公司	一种水回收系统用上浮助剂及其制备方法和应用

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB805526A (en) *	1955-12-05	1958-12-10	Dow Chemical Co	Method for clarifying water
US3367918A (en) *	1964-08-04	1968-02-06	Dow Chemical Co	Polymeric amide-secondary dialkyl ammonium salt-paraformaldehyde flocculant composition and method
US3897333A (en) *	1971-02-24	1975-07-29	Allied Colloids Mfg	Flocculating agents

1977
- 1977-09-13 CA CA286,634A patent/CA1085522A/en not_active Expired
- 1977-09-16 AU AU28871/77A patent/AU515197B2/en not_active Expired
- 1977-09-21 GB GB3941277A patent/GB1588342A/en not_active Expired
- 1977-10-13 DE DE19772746102 patent/DE2746102A1/de not_active Withdrawn
- 1977-10-14 IT IT5142277A patent/IT1090037B/it active
- 1977-10-24 FR FR7731980A patent/FR2369215A1/fr not_active Withdrawn
- 1977-10-24 BR BR7707091A patent/BR7707091A/pt unknown
- 1977-10-25 JP JP12732577A patent/JPS5389255A/ja active Pending
- 1977-10-26 NL NL7711749A patent/NL7711749A/xx not_active Application Discontinuation
- 1977-10-26 ES ES463547A patent/ES463547A1/es not_active Expired

Also Published As

Publication number	Publication date
JPS5389255A (en)	1978-08-05
AU2887177A (en)	1979-03-22
ES463547A1 (es)	1979-10-16
BR7707091A (pt)	1978-08-01
IT1090037B (it)	1985-06-18
GB1588342A (en)	1981-04-23
NL7711749A (nl)	1978-04-28
FR2369215A1 (fr)	1978-05-26
DE2746102A1 (de)	1978-04-27
AU515197B2 (en)	1981-03-19

Legal Events

Date	Code	Title	Description
1997-09-09	MKEX	Expiry

Publication	Publication Date	Title
US4137165A (en)	1979-01-30	Process for clarifying raw water
RU2040528C1 (ru)	1995-07-25	Способ получения водорастворимого катионного полимерного флокулянта
US3994806A (en)	1976-11-30	Composition and method for flocculating suspended solids
US7745529B2 (en)	2010-06-29	Flocculant composition and method for manufacturing the same
JP2624089B2 (ja)	1997-06-25	カチオン性高分子凝集剤
US5627260A (en)	1997-05-06	Quaternized tertiary aminomethyl acrylamide polymer microemulsions with improved performance
US3859212A (en)	1975-01-07	Flocculating agents
CA3057169C (en)	2021-11-02	Methods of preparing halide anion free quaternary ammonium salt monomers, polymerization methods therefor, and methods of use of the resulting polymers
EP0260108A1 (en)	1988-03-16	Hydrophobically functionalized cationic polymers
EP0528409A1 (en)	1993-02-24	Cationic polymer flocculating agents
US4053512A (en)	1977-10-11	Process for preparing poly(allyltrialkylammonium) salt flocculants
US5225088A (en)	1993-07-06	Use of nonhydrolyzed copolymers containing n-vinylformamide units as flocculants and drainage aids
GB2112005A (en)	1983-07-13	Quaternary ammonium graft polymers
CA1085522A (en)	1980-09-09	Process for clarifying raw water
US3406139A (en)	1968-10-15	Vinylimidazoline and vinyltetrahydropyrimidine polymers
US3956122A (en)	1976-05-11	Cationic arylamide-styrene copolymers and flocculation of sewage therewith
CN114213583B (zh)	2022-04-22	有机高分子絮凝剂及其制备方法
EP3805164A1 (en)	2021-04-14	Sludge dehydration agent and sludge dehydration method
US4098693A (en)	1978-07-04	Cationic chlorine-resistant polymeric flocculants and their use
CA2004244A1 (en)	1990-05-31	Copolymers of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium chloride monomer and vinyl monomer
CN116284565B (zh)	2023-08-01	一种用于污泥脱水的阳离子聚合物及其制备方法
CN117534189B (zh)	2025-01-28	一种疏水型有机-无机杂化絮凝剂及其制备方法
CN114276489B (zh)	2022-05-13	一种含硅的阳离子型聚丙烯酰胺及其用途
JP5952593B2 (ja)	2016-07-13	廃水処理方法
CA1107414A (en)	1981-08-18	Process for clarifying coal wash waters