IL123283A - Method of treating water - Google Patents
Method of treating waterInfo
- Publication number
- IL123283A IL123283A IL12328396A IL12328396A IL123283A IL 123283 A IL123283 A IL 123283A IL 12328396 A IL12328396 A IL 12328396A IL 12328396 A IL12328396 A IL 12328396A IL 123283 A IL123283 A IL 123283A
- Authority
- IL
- Israel
- Prior art keywords
- calcium hypochlorite
- water
- composition
- tetraborate
- standing water
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 58
- 238000000034 method Methods 0.000 title claims description 22
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 32
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 13
- 239000004327 boric acid Substances 0.000 claims description 13
- 150000001642 boronic acid derivatives Chemical class 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- WOJWAMOPSRJWGW-UHFFFAOYSA-N dodecasodium tetraborate octahydrate Chemical compound O.O.O.O.O.O.O.O.[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] WOJWAMOPSRJWGW-UHFFFAOYSA-N 0.000 claims 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- RWQVIBSTNMDLOW-UHFFFAOYSA-N O.O.O.O.O.O.O.O.[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] Chemical compound O.O.O.O.O.O.O.O.[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] RWQVIBSTNMDLOW-UHFFFAOYSA-N 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- KTDDBABFAZCLKP-UHFFFAOYSA-N dilithium;[oxido(oxoboranyloxy)boranyl]oxy-oxoboranyloxyborinate;pentahydrate Chemical compound [Li+].[Li+].O.O.O.O.O.O=BOB([O-])OB([O-])OB=O KTDDBABFAZCLKP-UHFFFAOYSA-N 0.000 claims 1
- CDMADVZSLOHIFP-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 CDMADVZSLOHIFP-UHFFFAOYSA-N 0.000 claims 1
- STNGULMWFPMOCE-UHFFFAOYSA-N ethyl 4-butyl-3,5-dimethyl-1h-pyrrole-2-carboxylate Chemical compound CCCCC1=C(C)NC(C(=O)OCC)=C1C STNGULMWFPMOCE-UHFFFAOYSA-N 0.000 claims 1
- 230000000813 microbial effect Effects 0.000 claims 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- GDTSJMKGXGJFGQ-UHFFFAOYSA-N 3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B([O-])OB2OB([O-])OB1O2 GDTSJMKGXGJFGQ-UHFFFAOYSA-N 0.000 description 13
- 238000000354 decomposition reaction Methods 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
- 229910052801 chlorine Inorganic materials 0.000 description 6
- 230000009182 swimming Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- 244000005700 microbiome Species 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229940063013 borate ion Drugs 0.000 description 2
- UFGAEWPJDRTJDZ-UHFFFAOYSA-N boric acid pentahydrate Chemical compound O.O.O.O.O.OB(O)O.OB(O)O.OB(O)O.OB(O)O UFGAEWPJDRTJDZ-UHFFFAOYSA-N 0.000 description 2
- 230000002308 calcification Effects 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-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
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003619 algicide Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 borate ions Chemical class 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- YALMXYPQBUJUME-UHFFFAOYSA-L calcium chlorate Chemical compound [Ca+2].[O-]Cl(=O)=O.[O-]Cl(=O)=O YALMXYPQBUJUME-UHFFFAOYSA-L 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003643 water by type 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/04—Hypochlorous acid
- C01B11/06—Hypochlorites
- C01B11/068—Stabilisation by additives other than oxides, hydroxides, carbonates of alkali or alkaline-earth metals; Coating of particles; Shaping; Granulation
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
Description
IMPROVED METHOD OF TREATING WATER For the Applicant, Eitan, Pearl, Latzer & Cohen-Zedek Advocates, Patent Attorneys & Notaries P-68698-IL IMPROVED METHOD OF TREATING WATER Technical Field This invention containing at least 25% by weight of a tetraborate or tetraborate/boric acid and the remaining components of the composition being calcium hypochlorite Ca(OCl)2- The composition can be used to treat waters such as swimming pools, spas, cooling towers and the like. The composition further comprises the alkaline metal tetraborate and optionally boric acid mixed with calcium hypochlorite.
Background of the Invention Sodium tetraborate has long been known to be effective as an algaecide and a fungicide in standing water systems such as swimming pools, drinking water reservoirs, and cooling towers and is the subject of U.S. Patent Nos. 4,594,091 and 5, 131.938, both to Girvan, both of which are incorporated herein by reference in their entirety. It has been found that the alkaline metal, tetraborate, by itself improves the treatment of standing water systems in several ways. The tetraborate solutions plus dissolved carbon didxide with produce sodium carbonate plus sodium bicarbonate thereby lowering the C02 concentration in the water and making it difficult for algae to germinate in the water. The tetraborates have also been shown to react with dissolved halides in the water to give off free halogen. Finally, the tetraborates increase the solubility of most other salts that may be added to the standing water system.
Another additive that is commonly used to treat standing water is calcium hypochlorite. Calcium hypochlorite is added to water and, when dissolved in water, provides a source of chlorine for disinfectant purposes and for general sanitation. Several commercial processes are currently used for the manufacture of the so-called "high-grade" calcium hypochlorite compositions containing at least 65% calcium hypochlorite from which the chlorine for sanitation purposes is derived. Several of these processes are described in U.S. Patent No. 3,793,216 which is incorporated herein by reference in its entirety. The '216 patent discloses a calcium hypochlorite composition comprising at least 55% calcium hypochlorite mixed with water soluble, hydrated inorganic salts in an amount sufficient to provide a water content in the total mixture in the range of about 3% to about 13%. Included in the disclosure as one of the hydrated inorganic salts are the salts containing tetraborate. The focus of the '216 patent is to reduce the flammability of the calcium hypochlorite. The major disadvantage of the essentially water-free calcium hypochlorite compositions is the danger intended thereto if contacted by external contaminants, which contamination causes exothermic decomposition of the material regardless of the temperature. For example, if any portion of a batch of said calcium hypochlorite, whether in a small container, large drum or uncontained mass, reaches a temperature of about 350° F, it will undergo a self-sustaining and self-propagating decomposition which will spread through the entire batch until decomposition is complete. Decomposition may be initiated by the accidental touching of a live flame or spark to the calcium hypochlorite composition, as for example, the accidental contact of a lit match or cigarette. Decomposition may also be initiated by contacting the hypochlorite with just a single drop of organic material, for example, glycerin, and alcohol, a variety of hydrocarbons "such as petroleum oil and many others. The decomposition of all gaseous chlorine which constitutes a toxic hazard to personnel in the area, and also involves oxygen, which intensifies a fire that might reach stored quantities of calcium hypochlorite. Because oxygen is released in the decomposition process, attempts to smother a -hypochlorite fire will be unsuccessful. The '216 patent thus describes a composition which reduces the likelihood of spontaneous decomposition of the calcium hypochlorite composition. However, the '216 patent does not disclose any other properties of a composition comprising calcium hypochlorite and an alkaline metal tetraborate and/or boric acid.
What is needed in the industry is a composition that will stabilize pH of the water, will reduce the presence of algae and other microorganisms which normally grow in standing water, and will provide a source of halogens which will further sanitize the water solution.
Summary of the Invention The present invention is a calcium hypochlorite/alkaline metal tetraborate or a calcium hypochlorite/alkaline metal tetraborate/boric acid composition which can be used to treat standing water systems such as swimming pools, spas, cooling towers and the like. The method of treating water of the present invention comprises the addition of the calcium hypochlorite/tetraborate and/or boric acid composition to the water periodically to stabilize pH and to increase the available chlorine to the water. It has been found that the calcium hypochlorite/tetraborate and/or boric acid composition act synergistically to reduce the growth of microorganisms in the water, reduce the cloudy scale on the sides of the water container that normally occurs when only calcium hypochlorite is added to the water and reduces the calcification of filters, especially sand filters.
Accordingly, it is an object of the present invention to provide a method for treating standing water systems Such as swimming pools, spas, and cooling towers by administering a composition comprising calcium hypochlorite and an alkaline metal tetraborate or calcium hypochlorite and a combination of an alkaline metal hypochlorite and boric acid.
It is further an object of the present invention to provide a method for treating standing water systems which will increase the availability of free chlorine to the system.
It is yet another object of the present invention to provide a method for treating standing water systems with a calcium hypochlorite composition wherein the cloudiness of the water is reduced.
It is yet another object of the present invention to provide a method for treating standing water systems with a calcium hypochlorite solution wherein the scale on the sides of the water container are reduced. It is another object of the present invention to provide a method for treating standing water (the normal cost of a calcium hypochlorite treatment of the standing water system is reduced).
These and other objects, features and advantages of the present invention will become apparent after a review of the following detailed description of the disclosed embodiments.
Detailed Description The present invention comprises a method for treating standing water systems with a composition comprising calcium hypochlorite and an alkaline metal borate. The borate is preferably an alkaline metal tetraborate pentahydrate, an alkaline metal tetraborate dehydrate an alkaline metal tetraborate pentahydrate. The alkaline metal can be any alkaline metal that is compatible with the borate ion. These alkaline metals include sodium, potassium, and lithium. The composition that can be used in the methocj, of the present invention also includes a calcium hypochlorite and a borate with boric acid. The combination of alkaline metal, borate and the boric acid can be in the ratio of 5% to 95% borate to boric acid by weight. - In the composition for use in the method of the present invention, the composition comprises between approximately 60% and 80% calcium hypochlorite and between approximately 20% and 40% of the borate molecule. Again, it is contemplated that by the term borate molecule, as used herein, the borate molecule can be any of the borate ions or it can be a combination of the borate ion and boric acid.
The prepare the calcium hypochlorite/borate composition, the compositions are prepared by mixing the particular ingredients uniformly in a powder blender that is, measured amounts of the calcium hypochlorite with varying, measured amounts of the borate salt and/or the boric acid combination. It is important to note that the composition should be uniformly mixed so that the resulting composition is a powder. The composition can be further processed by compressing it into convenient tabs that can be added to the standing water system. Methods of producing these tabs are well known to those of ordinary skill in the art. The calcium hypochlorite that is preferably used in the present invention is commercially available and contains on the order of at least about 65%, normally about 70-78%, and in some cases up to 85% or more by weight of calcium hypochlorite, the remaining constituents being sodium chloride, calcium chlorate, calcium hydroxide, calcium carbonate and calcium chloride. However, the products are always referred to in the trade as "calcium hypochlorite." The' term "standing water system" includes, but is not limited to, swimming pools, spas, hot water tubs, cooling tower systems, foot baths, drinking water reservoirs and the like. The present invention is contemplated as being used in any standing water system wherein pH is desirably maintained at a stable value, the growth of microorganisms is desirably inhibited, and the clarity of the standing water system is desirably maintained.
In performing the method of treating water according to the present invention, the calcium hypochlorite/borate composition is administered to the water, that is the standing water system at a final concentration of between approximately 0.5 to 10 pounds per approximately 10,000 gallons of water. Preferably, the final concentration of calcium hypochlorite/borate composition is between approximately 1 and 3 pounds per 10,000 gallons of water. Most preferably, the concentration of calcium hypochlorite/borate composition is approximately 2 pounds per approximately 10,000 gallons of water. For swimming pool treatment, the water is treated preferably between 1 and 7 times per week. The method of treating standing water of the present invention has several advantages over the use of calcium hypochlorite by itself. As disclosed in the U.S. Patent No. 3,793,216, the composition of calcium hypochlorite with borate is much less reactive when in contact with organic material and is therefore much safer to use. However, it is not taught or disclosed in the '216 patent that the composition comprising calcium hypochlorite and borates allows one to use approximately 30% less calcium hypochlorite to obtain the same beneficial effects as calcium hypochlorite alone, that the problems of water cloudiness using calcium hypochlorite alone are reduced or eliminated; that the normal problem of scale build-up on the sides of the standing water container are reduced or eliminated; that the calcification of water filters for the standing water system is reduced or eliminated; and that the availability of free chlorine to the standing water system is increased; and that the pH of the standing water system is stabilized at more neutral pH then when calcium hypochlorite is added to the water alone.
It should be understood, of course, that the foregoing relates only to preferred embodiments of the present invention and that numerous modifications or alterations may be made therein without departing from the spirit and the scope of the invention.
Claims (6)
1. A method of reducing microbial growth in a standing water system comprising the administration of an adnjixture comprising an effective amount of calcium hypocholorite and an effective amount of a mixture comprising borate salt and boric acid.
2. The method of Claim 1 wherein the admixture is administered to the standing water system so that the final concentration of the admixture is between approximately 0.5 and 10 pounds per 10,000 gallons of water.
3. The method of Claim 2, wherein the concentration of the admixture in the standing water system is between approximately 1 and 5 pounds per 10.000 gallons of water.
4. The method of claim 1 wherein the borate salt comprises, sodium tetraborate pentahydrate, sodium tetraborate octahydrate, sodium tetraborate decahydrate, lithium tetraborate pentahydrate, or potassium tetraborate octahydrate.
5. The method of Claim 5 wherein the borate salt is sodium tetraborate octahydrate.
6. The method of Claim 1 wherein the calcium hypochlorite in the admixture is between approximately 60% and 80% by weight. Eitan, Pearl, Latzer & Cohen-Zedek Advocates, Patent Attorneys & Notaries P-68698-IL
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US214195P | 1995-08-11 | 1995-08-11 | |
| US08/608,242 US5676844A (en) | 1996-02-28 | 1996-02-28 | Method of treating water |
| PCT/US1996/013076 WO1997007062A1 (en) | 1995-08-11 | 1996-08-12 | Improved method of treating water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL123283A0 IL123283A0 (en) | 1998-09-24 |
| IL123283A true IL123283A (en) | 2001-10-31 |
Family
ID=26670004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL12328396A IL123283A (en) | 1995-08-11 | 1996-08-12 | Method of treating water |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0843649A4 (en) |
| AU (1) | AU716053B2 (en) |
| BR (1) | BR9610454A (en) |
| CA (1) | CA2229281A1 (en) |
| CZ (1) | CZ43398A3 (en) |
| IL (1) | IL123283A (en) |
| MX (1) | MX9801172A (en) |
| NO (1) | NO980588L (en) |
| NZ (1) | NZ315902A (en) |
| WO (1) | WO1997007062A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2233801C1 (en) * | 2003-04-16 | 2004-08-10 | Федеральное государственное унитарное предприятие Комплексный научно-исследовательский и конструкторско-технологический институт водоснабжения, канализации, гидротехнических сооружений и инженерной гидрогеологии "НИИ Водгео" | Method of decontamination of water |
| MY174021A (en) * | 2009-02-20 | 2020-03-04 | Nisus Corp Inc | Borate microemulsion and method for making the same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3793216A (en) * | 1971-12-06 | 1974-02-19 | Pennwalt Corp | Calcium hypochlorite composition |
| US4048351A (en) * | 1974-11-06 | 1977-09-13 | Olin Corporation | Granular calcium hypochlorite coated with a low melting inorganic salt by spray graining |
| US4048651A (en) * | 1975-07-10 | 1977-09-13 | Bell & Howell Company | Color-corrected video signal processing with augmented color lock |
| US4880638A (en) * | 1988-08-23 | 1989-11-14 | Bioxy International, Ltd. | Biocidal composition and method for disinfecting articles |
| WO1991018510A1 (en) * | 1990-05-31 | 1991-12-12 | Olin Corporation | Algicidally enhanced compositions |
| US5164109A (en) * | 1990-05-31 | 1992-11-17 | Olin Corporation | Algicidally enhanced calcium hypochlorite compositions |
| US5478482A (en) * | 1994-05-16 | 1995-12-26 | Bio-Lab, Inc. | Method and compositions for treating recirculating water systems |
-
1996
- 1996-08-12 CA CA002229281A patent/CA2229281A1/en not_active Abandoned
- 1996-08-12 NZ NZ315902A patent/NZ315902A/en not_active IP Right Cessation
- 1996-08-12 IL IL12328396A patent/IL123283A/en not_active IP Right Cessation
- 1996-08-12 EP EP96928134A patent/EP0843649A4/en not_active Withdrawn
- 1996-08-12 BR BR9610454-6A patent/BR9610454A/en not_active Application Discontinuation
- 1996-08-12 WO PCT/US1996/013076 patent/WO1997007062A1/en not_active Ceased
- 1996-08-12 AU AU67720/96A patent/AU716053B2/en not_active Ceased
- 1996-08-12 CZ CZ98433A patent/CZ43398A3/en unknown
-
1998
- 1998-02-11 NO NO980588A patent/NO980588L/en not_active Application Discontinuation
- 1998-02-11 MX MX9801172A patent/MX9801172A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| MX9801172A (en) | 1998-11-29 |
| EP0843649A4 (en) | 1999-01-07 |
| AU716053B2 (en) | 2000-02-17 |
| CA2229281A1 (en) | 1997-02-27 |
| EP0843649A1 (en) | 1998-05-27 |
| NO980588L (en) | 1998-04-02 |
| NZ315902A (en) | 1999-07-29 |
| BR9610454A (en) | 2000-10-24 |
| NO980588D0 (en) | 1998-02-11 |
| WO1997007062A1 (en) | 1997-02-27 |
| CZ43398A3 (en) | 1998-06-17 |
| IL123283A0 (en) | 1998-09-24 |
| AU6772096A (en) | 1997-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| KB | Patent renewed | ||
| MM9K | Patent not in force due to non-payment of renewal fees |