CN101973644A - Reverse osmosis compound scale inhibitor - Google Patents
Reverse osmosis compound scale inhibitor Download PDFInfo
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- CN101973644A CN101973644A CN 201010524101 CN201010524101A CN101973644A CN 101973644 A CN101973644 A CN 101973644A CN 201010524101 CN201010524101 CN 201010524101 CN 201010524101 A CN201010524101 A CN 201010524101A CN 101973644 A CN101973644 A CN 101973644A
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- reverse osmosis
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Abstract
The invention provides a reverse osmosis compound scale inhibitor and belongs to the field of reverse osmosis water treatment. The scale inhibitor comprises the following components in percentage by weight: 10 to 20 percent of 1-hydroxyethylidene-1,1-diphosphonic acid, 30 to 40 percent of hydrolytic polymaleic anhydride, 30 to 40 percent of polyacrylic acid and 10 to 20 percent of sulfonated styrene-maleic anhydride copolymer, and the scale inhibitor comprises also comprises a bactericide. The reverse osmosis compound scale inhibitor fully utilizes the synergistic effect among organic phosphorous scale inhibitors, polycarboxylic acid scale inhibitors and sulfonic acid scale inhibitors, has good scale inhibition and dispersion performance; and when used in a reverse osmosis water inflow system, the scale inhibitor can effectively lighten pollution of calcium carbonate, calcium sulfate and silicate to reverse osmosis membranes and prolongs the cleaning period and service life of the reverse osmosis system.
Description
Technical field
The present invention relates to the reverse osmosis material for water treatment, a kind of reverse osmosis composite scale inhibitor that can alleviate the film pollution of saying so more specifically.
Background technology
Reverse osmosis is a kind of membrane separation technique, originates from the sixties in 20th century, has obtained widespread use aspect water treatment at present.In the coastland that some Freshwater resources lack, reverse osmosis is used for sea water desaltination, for people's productive life provides fresh water.Simultaneously, as a kind of high purity water technology of preparing, reverse osmosis can be satisfied the water requirement of semi-conductor, microelectronics, electric power, chemical industry, medicine and other fields.In water resources today more and more in short supply, reverse osmosis is used also obtaining aspect the wastewater treatment widely as waste water advanced treatment technology and water resources reuse technology.
In the reverse osmosis water treatment process, it is the key factor that influences reverse osmosis system working efficiency and operation life that film pollutes.In system's operational process, physics, chemical action constantly take place or cause in face or fenestra internal adsorption, deposition and cause membrane pore size to diminish or stop up because of concentration polarization makes some solute surpass its solubleness and mechanical effect in the film surface concn in the bacterium in the water inlet, particulate, colloidal particle or solute macromole and reverse osmosis membrane, membrane flux and stalling characteristic are obviously descended, cause irreversible film to pollute.Film pollutes mainly can be divided into chemical pollution and biological pollution.The reverse osmosis system chemical pollution mainly is a deposit carbon silicate dirt and poison because of Fe, Sr, Ba content overproof in the water cause membrane element in the membrane element.And biological pollution is meant that mainly microorganism is that carrier is bred growth by the nutritive salt of reverse osmosis concentrated water section with the reverse osmosis membrane, form biological membranous layer on the reverse osmosis membrane surface, cause that pressure reduction increases rapidly between the reverse osmosis system Inlet and outlet water, water production rate and ratio of desalinization descend fast, simultaneously polluted product water.For microbial contamination, adopt mostly and disinfect, reduce microbial population quantity and biological activity in the water inlet.And, can adopt the way that adds Scale inhibitors to solve for inorganic scale.A kind of good Scale inhibitors not only can be stablized the inorganic incrustation ion in the water inlet, and can influence inorganic incrustation ion crystallisation process, reduces the reactive force between dirt and the reverse osmosis membrane, and it is flowed away with condensed water.At present, domestic reverse osmosis antisludging agent kind differs, and product performance also have certain gap with comparing abroad.Domestic reverse osmosis unit also adopts the import Scale inhibitors mostly.
United States Patent (USP) 5256303 discloses a kind of composite scale inhibitor that is used for reverse osmosis system, and its component comprises organic phosphine class and acrylic copolymer class, can suppress the deposition of reverse osmosis membrane surface calcium sulfate.United States Patent (USP) 5358640 discloses a kind of composite scale inhibitor, and its composition comprises water-soluble organic phosphine, acrylamide polymer, caustic alkali and water.Can alleviate calcium sulfate and tosca pollution in the reverse osmosis system.But the shortcoming of these two kinds of Scale inhibitorss is that organic phosphine content is more in the prescription, and reverse osmosis system must strict controlled temperature and pH value.
Summary of the invention
1, the invention technical problem that will solve: limited at the existing composite scale inhibitor working conditions that is used for reverse osmosis system, easily pollute, the present invention aims to provide a kind of reverse osmosis composite scale inhibitor, can be used for reverse osmosis process, alleviating film pollutes, improve the reverse osmosis system operational efficiency, prolong operation life.
2, summary of the invention
Inventive principle: the reverse osmosis composite scale inhibitor that 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, hydrolytic polymaleic anhydride, polyacrylic acid, Sulfonated Copolymer of Styrene and Maleic Anhydride are formed, mix by a certain percentage in effective constituent, make the aqueous solution, can make high-performance reverse osmosis composite scale inhibitor provided by the present invention.The present invention has made full use of the synergistic effect between organic phosphine class Scale inhibitors, polycarboxylic acid Scale inhibitors and the sulfonic acid class Scale inhibitors, has developed a kind of high-performance composite scale inhibitor.According to different condition of water quality, the present invention can be by changing the ratio of heterogeneity in the composite scale inhibitor.
Technical scheme of the present invention is:
A kind of reverse osmosis composite scale inhibitor, it comprises 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, hydrolytic polymaleic anhydride, polyacrylic acid and Sulfonated Copolymer of Styrene and Maleic Anhydride.Effective constituent by weight percentage, wherein the consumption of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is 10%～20%, the consumption of hydrolytic polymaleic anhydride is 30%～40%, polyacrylic consumption is 30%～40%, the consumption of Sulfonated Copolymer of Styrene and Maleic Anhydride is 10%～20%.
Further improvement of the present invention comprises a kind of in sterilant dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride or the polyquaternium or wherein two kinds or three's mixing, its consumption be composite scale inhibitor effective constituent (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, hydrolytic polymaleic anhydride, polyacrylic acid and Sulfonated Copolymer of Styrene and Maleic Anhydride) and sterilant net content weight percent concentration 1%～5%.
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid of the present invention is pulverulent solids or its aqueous solution, the molecular weight of hydrolytic polymaleic anhydride is at 400～2000g/mol, polyacrylic molecular weight is at 2000～100000g/mol, and the molecular weight of Sulfonated Copolymer of Styrene and Maleic Anhydride is at 1000～10000g/mol.The sterilant that the present invention adopts is a kind of in dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride, the polyquaternium or wherein two kinds or three's mixing.
The present invention is by the mixing of different ratios between 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, hydrolytic polymaleic anhydride, polyacrylic acid and the Sulfonated Copolymer of Styrene and Maleic Anhydride, obtain synergistic effect preferably, inorganic incrustation ion and inorganic scale are had good chelating solubilising, lattice distortion and cohesion dissemination.1%～5% sterilant can prolong the quality guaranteed period of Scale inhibitors.According to the different influent qualities of reverse osmosis system, consumption of the present invention is generally between 2～15mg/L.
For reaching best scale-inhibiting properties, add snack made with traditional Chinese medicines and should be located at before security personnel's strainer, use the volume pump dosing, stablize adjustable to guarantee dosage.The present invention can be miscible with the water arbitrary proportion, can add dose according to flooding quantity and influent quality setting, to guarantee best scale inhibition effect.
3, beneficial effect: the invention provides a kind of reverse osmosis composite scale inhibitor, each component mixes according to a certain percentage, is mixed with the aqueous solution, can make Scale inhibitors provided by the present invention.The present invention can mix with the water arbitrary proportion, and each components contents is all in active principle (being the ratio of active principle in total active principle of each component).
The present invention is used for reverse osmosis system, can effectively control CaCO
3, CaSO
4, BaSO
4Deng extensive fouling on reverse osmosis membrane, the inorganic salt crystallisation process is produced certain influence, make the inorganic scale of formation be difficult for flowing away with condensed water at the film surface deposition.Thereby prolong the work-ing life of membrane element, reduce the working cost of equipment greatly.
Embodiment:
Further specify the present invention in conjunction with the following examples, but be not limited to its scope.
In following examples, the Versa TL-3 product that the Sulfonated Copolymer of Styrene and Maleic Anhydride of using in the composite scale agent prescription adopts Arco Chemical company to produce, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, hydrolytic polymaleic anhydride and polyacrylic acid adopt Nanjing to receive NC-201, NC-303, the NC-301 that water technology company limited of section produces, dodecyl benzyl dimethyl ammonium chloride and tetradecyl dimethyl benzyl ammonium chloride adopt by Chengdu Gracia chemical technology company limited chemical agent, and polyquaternium adopts the HL-505 product of being produced by the bright precious company in Wuhan, Hubei.
Embodiment 1
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 20% |
| Hydrolytic polymaleic anhydride | 30% |
| Polyacrylic acid | 30% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 15% |
| Dodecyl benzyl dimethyl ammonium chloride | 5% |
Getting 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid aqueous solution 29.9g, hydrolytic polymaleic anhydride aqueous solution 60.0g, polyacrylic acid aqueous solution 85.7g, Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 21.4g and dodecyl benzyl dimethyl ammonium chloride 11.4g joins in the reaction vessel, the room temperature that stirs was placed 24 hours, and the composite scale inhibitor active constituent content is 48.0%.
Embodiment 2
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 10% |
| Hydrolytic polymaleic anhydride | 40% |
| Polyacrylic acid | 39% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 10% |
| Dodecyl benzyl dimethyl ammonium chloride | 1% |
By calculated amount 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid powder 10.0g, hydrolytic polymaleic anhydride aqueous solution 80.0g, polyacrylic acid aqueous solution 111.4g, Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 14.2g and dodecyl benzyl dimethyl ammonium chloride 2.3g are joined in the reaction vessel, the room temperature that stirs was placed 24 hours, and the composite scale inhibitor active constituent content is 45.9%.
Embodiment 3
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 15% |
| Hydrolytic polymaleic anhydride | 30% |
| Polyacrylic acid | 32% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 20% |
| Dodecyl benzyl dimethyl ammonium chloride | 3% |
Getting 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid aqueous solution 22.4g, hydrolytic polymaleic anhydride aqueous solution 60.0g, polyacrylic acid aqueous solution 91.4g, Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 28.6g and dodecyl benzyl dimethyl ammonium chloride 6.8g joins in the reaction vessel, stir, the composite scale inhibitor active constituent content is 47.8%.
Embodiment 4
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 10% |
| Hydrolytic polymaleic anhydride | 35% |
| Polyacrylic acid | 40% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 13% |
| Dodecyl benzyl dimethyl ammonium chloride | 2% |
Getting 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid aqueous solution 14.9g, hydrolytic polymaleic anhydride aqueous solution 70.0g, polyacrylic acid aqueous solution 114.2g, the Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 18.6 and dodecyl benzyl dimethyl ammonium chloride aqueous solution 4.5g joins in the reaction vessel, stir, the composite scale inhibitor active constituent content is 45.0%.
Embodiment 5
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 12% |
| Hydrolytic polymaleic anhydride | 33% |
| Polyacrylic acid | 32% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 20% |
| Dodecyl benzyl dimethyl ammonium chloride | 3% |
Getting 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid aqueous solution 17.9g, hydrolytic polymaleic anhydride aqueous solution 66.0g, polyacrylic acid aqueous solution 91.4g, Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 28.6g and dodecyl dimethyl aqueous ammonium chloride solution 6.8g joins in the reaction vessel, the room temperature that stirs was placed 24 hours, and the composite scale inhibitor active constituent content is 47.4%.
Embodiment 6
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 12% |
| Hydrolytic polymaleic anhydride | 33% |
| Polyacrylic acid | 32% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 20% |
| The tetradecyl dimethyl benzyl ammonium chloride | 3% |
Getting 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid aqueous solution 17.9g, hydrolytic polymaleic anhydride aqueous solution 66.0g, polyacrylic acid aqueous solution 91.4g, Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 44.4g and tetradecyl dimethyl benzyl ammonium chloride aqueous solution 6.8g joins in the reaction vessel, the room temperature that stirs was placed 24 hours, and the composite scale inhibitor active constituent content is 44.1%.
Embodiment 7
Mix composite in effective constituent in following ratio each component:
| 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid | 12% |
| Hydrolytic polymaleic anhydride | 33% |
| Polyacrylic acid | 32% |
| Sulfonated Copolymer of Styrene and Maleic Anhydride | 20% |
| Polyquaternium | 3% |
By calculated amount 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid aqueous solution 17.9g, hydrolytic polymaleic anhydride aqueous solution 66.0g, polyacrylic acid aqueous solution 91.4g, Sulfonated Copolymer of Styrene and Maleic Anhydride aqueous solution 28.6g and polyquaternium aqueous solution 6.8g are joined in the reaction vessel, the room temperature that stirs was placed 24 hours, and the composite scale inhibitor active constituent content is 47.4%.
In order to prove scale-inhibiting properties of the present invention, the applicant adopts the composite scale inhibitor of embodiment 1～7 quality proportioning preparation, carried out antisludging test, its result such as following table according to State Standard of the People's Republic of China GB/T16632-2008 " the mensuration tosca method of water conditioner scale-inhibiting properties ":
Composite scale inhibitor static-state scale inhibition performance test result of the present invention
| Embodiment | Scale inhibitors effective concentration (mg/L) | Lime carbonate scale inhibition performance (%) |
| Embodiment 1 | 10 | 76.8 |
| Embodiment 2 | 15 | 78.2 |
| Embodiment 3 | 8 | 77.3 |
| Embodiment 4 | 2 | 70.8 |
| Embodiment 5 | 4 | 73.8 |
| Embodiment 6 | 6 | 76.3 |
| Embodiment 7 | 5 | 72.9 |
Embodiment scale-inhibiting properties test-results shows that in GB GB/T16632-2008 evaluation method, test temperature is 80 ℃, and the embodiment of the invention shows good scale-inhibiting properties.And reverse osmosis system operation at ambient temperature mostly, scale inhibition effect is more obvious.
Claims (4)
1. reverse osmosis composite scale inhibitor, it is characterized in that being made up of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, hydrolytic polymaleic anhydride, polyacrylic acid, Sulfonated Copolymer of Styrene and Maleic Anhydride, wherein the weight percent of each component is: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 10%～20%, hydrolytic polymaleic anhydride 30%～40%, polyacrylic acid 30%～40%, Sulfonated Copolymer of Styrene and Maleic Anhydride 10%～20%.
2. reverse osmosis composite scale inhibitor according to claim 1, it is characterized in that also comprising a kind of in dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride or the polyquaternium as sterilant or wherein two kinds or three's mixing, its weight percent content is 1%～5%.
3. reverse osmosis composite scale inhibitor according to claim 1 and 2 is characterized in that form or aqueous solution that each component exists when buying with it.
4. reverse osmosis composite scale inhibitor according to claim 1 and 2 is characterized in that reverse osmosis composite scale inhibitor usage quantity is 2～15mg/L.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504099A (en) * | 2011-11-17 | 2012-06-20 | 盐城纺织职业技术学院 | Preparation method for modified maleic anhydride-styrene sodium sulfonate copolymer serving as antibacterial scale inhibitor |
| CN102992498A (en) * | 2012-11-26 | 2013-03-27 | 洪仁作 | Low-phosphorous reverse osmosis composite scale inhibitor |
| CN103043807A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气股份有限公司 | Barium strontium sulphate scale inhibitor for oil field and application thereof |
| CN103125482A (en) * | 2011-11-30 | 2013-06-05 | 安徽省蓝天化工有限公司 | Preparation method of sterilization and algae removal stripping agent |
| CN103975948A (en) * | 2014-06-10 | 2014-08-13 | 山东瑞爱特环保科技有限公司 | Biocide-algaecide for circulating water and preparation method thereof |
| CN104923078A (en) * | 2015-06-10 | 2015-09-23 | 上海丰信环保科技有限公司 | Scale inhibitor for antibacterial reverse-osmosis membrane for printing and dyeing wastewater |
| CN107570016A (en) * | 2017-09-27 | 2018-01-12 | 中海油天津化工研究设计院有限公司 | A kind of concentrated water reverse osmosis antisludging agent and preparation method thereof |
| CN107686173A (en) * | 2016-08-05 | 2018-02-13 | 湖州欧美新材料有限公司 | A kind of dirt dispersion agent for desalinization |
| WO2018040097A1 (en) * | 2016-09-05 | 2018-03-08 | Kemira Oyj | Composition and method for controlling, preventing and/or reducing formation of inorganic scale, and use of composition |
| CN111495193A (en) * | 2019-05-16 | 2020-08-07 | 河北权科环保科技有限公司 | Reverse osmosis membrane repairing reagent and preparation method and application thereof |
| CN113955865A (en) * | 2021-10-22 | 2022-01-21 | 南京大学 | Green and efficient hydroxyethyl cellulose modified scale inhibitor for inhibiting silicon dioxide scaling and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338433A (en) * | 2000-08-11 | 2002-03-06 | 中国石油化工股份有限公司 | Method for using treated sewage in circulating water system |
| CA2069789C (en) * | 1991-05-31 | 2005-10-04 | Shih-Ruey T. Chen | Polyether polyamino methylene phosphonates for high ph scale control |
| CN101172726A (en) * | 2007-11-08 | 2008-05-07 | 长庆石油勘探局 | Method and technological process for treating sewage of oil recovery |
| CN101423299A (en) * | 2007-10-31 | 2009-05-06 | 中国石油化工股份有限公司 | Reverse osmosis membrane scale inhibitor and preparation and use method thereof |
-
2010
- 2010-10-29 CN CN 201010524101 patent/CN101973644A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2069789C (en) * | 1991-05-31 | 2005-10-04 | Shih-Ruey T. Chen | Polyether polyamino methylene phosphonates for high ph scale control |
| CN1338433A (en) * | 2000-08-11 | 2002-03-06 | 中国石油化工股份有限公司 | Method for using treated sewage in circulating water system |
| CN101423299A (en) * | 2007-10-31 | 2009-05-06 | 中国石油化工股份有限公司 | Reverse osmosis membrane scale inhibitor and preparation and use method thereof |
| CN101172726A (en) * | 2007-11-08 | 2008-05-07 | 长庆石油勘探局 | Method and technological process for treating sewage of oil recovery |
Non-Patent Citations (1)
| Title |
|---|
| 《工业水处理》 20050831 李亚红等 海水淡化反渗透系统中的膜用化学品 第13－17页 2－4 第25卷, 第8期 2 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043807A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气股份有限公司 | Barium strontium sulphate scale inhibitor for oil field and application thereof |
| CN103043807B (en) * | 2011-10-17 | 2014-06-04 | 中国石油天然气股份有限公司 | Barium strontium sulphate scale inhibitor for oil field and application thereof |
| CN102504099A (en) * | 2011-11-17 | 2012-06-20 | 盐城纺织职业技术学院 | Preparation method for modified maleic anhydride-styrene sodium sulfonate copolymer serving as antibacterial scale inhibitor |
| CN103125482A (en) * | 2011-11-30 | 2013-06-05 | 安徽省蓝天化工有限公司 | Preparation method of sterilization and algae removal stripping agent |
| CN102992498A (en) * | 2012-11-26 | 2013-03-27 | 洪仁作 | Low-phosphorous reverse osmosis composite scale inhibitor |
| CN103975948B (en) * | 2014-06-10 | 2015-11-11 | 山东瑞爱特环保科技有限公司 | Cycle water Biocidal algae-killing agent and preparation method thereof |
| CN103975948A (en) * | 2014-06-10 | 2014-08-13 | 山东瑞爱特环保科技有限公司 | Biocide-algaecide for circulating water and preparation method thereof |
| CN104923078A (en) * | 2015-06-10 | 2015-09-23 | 上海丰信环保科技有限公司 | Scale inhibitor for antibacterial reverse-osmosis membrane for printing and dyeing wastewater |
| CN107686173A (en) * | 2016-08-05 | 2018-02-13 | 湖州欧美新材料有限公司 | A kind of dirt dispersion agent for desalinization |
| WO2018040097A1 (en) * | 2016-09-05 | 2018-03-08 | Kemira Oyj | Composition and method for controlling, preventing and/or reducing formation of inorganic scale, and use of composition |
| CN109661378A (en) * | 2016-09-05 | 2019-04-19 | 凯米罗总公司 | For controlling, preventing and/or reducing the composition of inorganic scale formation and the purposes of method and the composition |
| CN107570016A (en) * | 2017-09-27 | 2018-01-12 | 中海油天津化工研究设计院有限公司 | A kind of concentrated water reverse osmosis antisludging agent and preparation method thereof |
| CN111495193A (en) * | 2019-05-16 | 2020-08-07 | 河北权科环保科技有限公司 | Reverse osmosis membrane repairing reagent and preparation method and application thereof |
| CN113955865A (en) * | 2021-10-22 | 2022-01-21 | 南京大学 | Green and efficient hydroxyethyl cellulose modified scale inhibitor for inhibiting silicon dioxide scaling and preparation method thereof |
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Application publication date: 20110216 |