Method for the removal of submicron particulates from chlorinated water by sequentially adding a cationic polymer followed by adding an anionic polymer
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-001/54
C02F-103/42
출원번호
UP-0355240
(2006-02-15)
등록번호
US-7790042
(2010-09-27)
발명자
/ 주소
Nichols, Everett J.
Williams, Jeffrey F.
Scott, James R.
Palczewski, Christine M.
출원인 / 주소
HaloSource, Inc.
대리인 / 주소
Christensen O'Connor Johnson Kindness PLLC
인용정보
피인용 횟수 :
6인용 특허 :
17
초록▼
A method for removing submicron colloidal particulates, such as hydrocarbons, from water. The method includes first adding a soluble, cationic polymer, such as chitosan, a salt, or solution of chitosan to water containing the submicron particulates and a halogenating agent, followed by adding a solu
A method for removing submicron colloidal particulates, such as hydrocarbons, from water. The method includes first adding a soluble, cationic polymer, such as chitosan, a salt, or solution of chitosan to water containing the submicron particulates and a halogenating agent, followed by adding a soluble, anionic polymer or anionic salt to the water. The resulting flocs are filtered to remove the submicron particulates.
대표청구항▼
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A method for removing submicron particulates from water containing a halogenating agent, comprising: (a) adding chitosan to water comprising submicron particulates and a halogenating a
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A method for removing submicron particulates from water containing a halogenating agent, comprising: (a) adding chitosan to water comprising submicron particulates and a halogenating agent to provide chitosan-treated water; (b) adding a soluble, anionic polymer comprising alginate to the chitosan-treated water to provide polymer-treated water; (c) allowing flocs comprising submicron particulates to form in the polymer-treated water; and (d) filtering the flocs to remove the submicron particulates from the water. 2. The method of claim 1, wherein the chitosan is in solution when added to the water. 3. The method of claim 2, wherein the solution comprises acetic acid. 4. The method of claim 1, further comprising adding at least one of sodium hexametaphosphate, sodium carboxymethylcellulose, pectin, polyacrylic acid, anionic polysaccharide, carrageenan, or polyacrylamide. 5. The method of claim 4, wherein the polymer concentration in the water is about 5 ppb to about 100 ppm by weight. 6. The method of claim 1, wherein the water is in a swimming pool, spa, water park, or hot tub. 7. The method of claim 1, comprising filtering the flocs in at least one of a sand, cartridge, or diatomaceous earth filter. 8. The method of claim 1, further comprising adding an inorganic aluminum coagulant. 9. The method of claim 8, wherein the inorganic aluminum coagulant is aluminum sulfate or polyaluminum chloride. 10. The method of claim 8, wherein the inorganic aluminum coagulant concentration in the water is about 50 ppb to about 100 ppm by weight. 11. The method of claim 1, further comprising adding a ferric salt coagulant to the water. 12. The method of claim 11, wherein the ferric salt coagulant is ferric sulfate or ferric chloride. 13. The method of claim 11, wherein the ferric salt coagulant concentration in the water is about 50 ppb to about 100 ppm by weight. 14. The method of claim 1, wherein the chitosan concentration in the water is about 5 ppb to about 100 ppm by weight. 15. The method of claim 1, wherein the halogenating agent comprises at least one of sodium hypochlorite, calcium hypochlorite, chlorine, hypochlorous acid, bromine, hypobromous acid, N-chlorosuccinimide, sodium hypobromite, pyridinium bromide, perbromide, N-bromosuccinimide, chloramine-T, chlorhexadine, dichlorodimethylhydantoin, bromochlorodimethylhydantoin, dibromodimethylhydantoin, dichloroisocyanurate, or trichloroisocyanurate. 16. The method of claim 1, wherein the halogenating agent concentration in the water is about 1 ppm to about 50 ppm by weight. 17. The method of claim 1, wherein the halogenating agent concentration in the water is about 2 ppm to about 20 ppm by weight. 18. The method of claim 1, wherein the submicron particulates further comprise a nonpolar hydrocarbon. 19. The method of claim 1, wherein the submicron particulates further comprise oil. 20. The method of claim 1, wherein the submicron particulates include particles in the range from about 0.5 microns to less than 1 micron. 21. The method of claim 1, wherein the submicron particulates include particles in the range of from about 0.3 microns to less than 0.5 microns. 22. The method of claim 1, wherein the submicron particulates include particles in the range of from about 0.2 microns to about 0.3 microns. 23. The method of claim 1, wherein the submicron particulates include particles less than 0.5 microns. 24. The method of claim 1, wherein step (b) follows step (a). 25. The method of claim 1, wherein step (b) is performed about 4 hours to about 8 hours after performing step (a). 26. The method of claim 1, wherein the water comprises a biguanide. 27. A method for clarifying water, comprising: to water containing about 2 ppm to about 20 ppm by weight of a halogenating agent and submicron particulates, adding chitosan to reach a concentration in the water of about 5 ppb to about 100 ppm by weight; followed by adding to the water, a soluble, anionic polymer comprising alginate to reach a concentration in the water of about 5 ppb to about 100 ppm by weight; and filtering the water to remove flocs comprising submicron particulates, to clarify said water. 28. A method for clarifying water, comprising: to water containing about 2 ppm to about 20 ppm by weight of a halogenating agent and submicron particulates, adding a soluble, cationic polymer comprising chitosan to reach a concentration in the water of about 5 ppb to about 100 ppm by weight; followed by adding to the water, a soluble, anionic polymer or anionic salt comprising alginate to reach a concentration in the water of about 5 ppb to about 100 ppm by weight; and filtering the water to remove flocs comprising submicron particulates, to clarify said water. 29. A method for removing submicron particulates from water, comprising: adding a soluble, cationic polymer comprising chitosan to water containing a halogenating agent and submicron particulates; allowing dispersal of the soluble, cationic polymer to occur in the water; followed by adding a soluble, anionic polymer or anionic polymer salt comprising alginate to the water; and filtering the water to remove flocs comprising submicron particulates. 30. A method for clarifying water in a swimming pool, comprising: adding a soluble, cationic polymer comprising chitosan to water containing submicron particulates in a swimming pool; allowing the soluble, cationic polymer to disperse throughout the water in the swimming pool; followed by adding a soluble, anionic polymer or anionic salt comprising alginate to the water in the swimming pool; and filtering the water of the swimming pool to remove the flocs comprising submicron particulates formed from the cationic polymer and the anionic polymer, to clarify said water.
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이 특허에 인용된 특허 (17)
Roy Martin, Air and water purification using continuous breakpoint halogenation and peroxygenation.
Peniston Quintin P. (Rte. 7 ; Box 7710 Bainbridge Island WA 98110) Johnson Edwin Lee (Rte. 5 ; Box 4246 Issaquah WA 98027), Method of and apparatus for fluid filtration and the like with the aid of chitosan.
Nichols, Everett J.; Scott, James R.; Williams, Jeffrey F.; Chen, Yongjun, Use of a dual polymer system for enhanced water recovery and improved separation of suspended solids and other substances from an aqueous media.
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