CN1970460A - Reverse osmosis membrane anti-scaling agent and its preparation method - Google Patents
Reverse osmosis membrane anti-scaling agent and its preparation method Download PDFInfo
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- CN1970460A CN1970460A CN 200610129670 CN200610129670A CN1970460A CN 1970460 A CN1970460 A CN 1970460A CN 200610129670 CN200610129670 CN 200610129670 CN 200610129670 A CN200610129670 A CN 200610129670A CN 1970460 A CN1970460 A CN 1970460A
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- acid
- mineral compound
- sulfonic group
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- organic carboxyl
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Abstract
The invention discloses a reverse osmosis membrane antisludging agent and preparing method, which comprises the following steps: allocating raw material with organic carboxylic acid, compound with amide and sulfonic group, inorganic compound and deionized water; blending compound with amide and sulfonic group, inorganic compound and water according to proportion; heating to 50-90 deg.c; dripping inorganic compound and organic carboxylic acid; stirring to react for 1.5-3.5h; insulating 1-4h; obtaining the product with molecular weight scale between 1500 and 3500; setting the medical quantity between 3ppm and 15ppm in the real water disposing course.
Description
Technical field
The present invention relates to water-treatment technology field, be a kind of reverse osmosis membrane antisludging agent and preparation method thereof, its technology focuses on solving that lime carbonate is easy to sedimentary problem on the reverse osmosis membrane.
Background technology
The membrane separation technique large-scale application is since the sea water desaltination engineering of the sixties in 20th century.Except that the desalination that is used for seawater, brackish water on a large scale and pure water, ultrapure water production and reusing sewage, also be used for fields such as foodstuffs industry, medicine industry, biotechnology at present.Reverse osmosis technology is one of the most effective desalination technology, but has the reverse osmosis membrane pollution problem in operational process.The pollution of reverse osmosis membrane is divided into chemical pollution, biological pollution, colloid pollution and particle contamination.Wherein, chemical pollution and colloid pollution can adopt and control supply water temperature, add the method control of dirt dispersion agent.
At present, aspect control chemical pollution and colloid pollution, domesticly generally adopt traditional scale inhibition dispersing mode-Sodium hexametaphosphate 99 to add acid.There are many defectives in this operation scheme, shortcomings such as medicament easily decomposes, critical saturation index low (LIS＜0.50), dispersing and antisludging weak effect.And because reverse osmosis system concentrates soon, the concentration polarization phenomenon is serious, this method is also more and more inapplicable.
In the reverse osmosis desalination process, in case fouling takes place, the high pH in fouling zone can accelerate the hydrolysis of some mould material (as the CA film), usually at CaCO
3After fouling a couple of days, can find that promptly ratio of desalinization descends.Add Scale inhibitors, can prevent the formation of lime carbonate, calcium sulfate dirt.
Film is used to prevent that with dirt dispersion agent difficulty soluble salt from separating out (being fouling) on reverse osmosis membrane be highly effective.They distort crystal by delaying and twisting the salt crystal growth and control sedimentary process in forming process, thereby can't generate fine and close crystallization.Most of Scale inhibitorss all have the dispersive effect simultaneously, prevent that particle aggregation from becoming to be enough to deposit the macrobead that gets off.That is to say, make that difficulty soluble salt has little time to be deposited on the film surface in the reverse osmosis concentrated water, just with concentrated water drainage outside the RO device.
Antisludging agent for osmosis-reverse membrane is a kind of water treatment specialty chemicals that develop on the basis of membrane separation technique development; start from the mid-1970s; be tending towards perfect to the nineties; but development technology is simple, with low cost, effectiveness is reliable lastingly, the film Scale inhibitors of enabling environment protection, still has very big research and using value.
Summary of the invention
The invention provides a kind of efficient low-molecular-weight novel reverse osmosis membrane antisludging agent, the effect when being different from circulating water antisludging agent commonly used fully as the Scale inhibitors of reverse osmosis membrane.
The present invention is a kind of reverse osmosis membrane antisludging agent and preparation method thereof, it is characterized in that:
Its composition comprises organic carboxyl acid, amide containing compounds, contains sulfonic group compounds, mineral compound and deionized water, and wherein each weight percentages of components is:
Organic carboxyl acid 10-60%
Amide containing compounds 10-30%
Contain sulfonic group compounds 1-10%
Mineral compound 1-20%
The deionized water surplus
Described organic carboxyl acid is selected from vinylformic acid, toxilic acid, methylene-succinic acid; The amide containing compounds is selected from 2-acrylamide-2-methyl-propyl sulfonic acid, acrylamide, propyl methyl acid amides; Contain the sulfonic group compounds and be selected from sulfonated phenylethylene, vinyl sulfonic acid, sodium lignosulfonate; Mineral compound is selected from Sodium Persulfate, Ammonium Persulfate 98.5, sodium bisulfite; Selected water is deionized water.
Its preparation method for the amide containing compounds, contain sulfonic group compounds, mineral compound (account for inorganics total amount 70%) and water is mixed in proportion adding successively, when being heated to 50 ℃-90 ℃, drip mineral compound (account for inorganics total amount 30%) and organic carboxyl acid respectively, reaction was stirred 1.5-3.5 hour, be incubated 1-4 hour, promptly get product, the products molecule weight range is 1500-3500, and the dosing weight range is at 3ppm-15ppm in the actual water treatment applications of reverse osmosis membrane.
Preferred version as a kind of reverse osmosis membrane antisludging agent of the present invention and preparation method thereof is characterized in that:
It forms each weight percentages of components:
Organic carboxyl acid 15-55%
Amide containing compounds 12-28%
Contain sulfonic group compounds 2-8%
Mineral compound 2-18%
The deionized water surplus
Described organic carboxyl acid is selected from vinylformic acid, toxilic acid; The amide containing compounds is selected from 2-acrylamide-2-methyl-propyl sulfonic acid, acrylamide; Contain the sulfonic group compounds and be selected from sulfonated phenylethylene, vinyl sulfonic acid; Mineral compound is selected from Sodium Persulfate, Ammonium Persulfate 98.5; Selected water is deionized water.
Its preparation method for the amide containing compounds, contain sulfonic group compounds, mineral compound (account for inorganics total amount 70%) and water is mixed in proportion adding successively, when being heated to 55 ℃-85 ℃, drip mineral compound (account for inorganics total amount 30%) and organic carboxyl acid respectively, reaction was stirred 2-3 hour, be incubated 2-3 hour, promptly get product, the products molecule weight range is 2000-3000, and the dosing weight range is at 5ppm-12ppm in actual applications.
Lower and the narrow distribution of molecular weight product of the present invention, scope are 1500-3500, can solve the deposition problems of lime carbonate etc. on the reverse osmosis membrane well.Simultaneously, product of the present invention (hereinafter to be referred as TM-400) not only has scale-inhibiting properties preferably, and nontoxic, without phosphorus, pollution-free.Can improve the working efficiency of reverse osmosis system, prolong the duration of service and the cleaning interval of reverse osmosis membrane greatly.
Embodiment
The invention will be further described in conjunction with the embodiments.
Embodiment 1:
Choose raw material by weight percentage
Organic carboxyl acid 15%
Amide containing compounds 10%
Contain sulfonic group compounds 1%
Mineral compound 8%
The deionized water surplus
With amide containing compounds 2-acrylamide-2-methyl-propyl sulfonic acid, contain sulfonic group compounds sulfonated phenylethylene, mineral compound (account for inorganics total amount 70%) Sodium Persulfate and deionized water and be mixed in proportion successively and add.When being heated to 50 ℃, drip mineral compound (account for inorganics total amount 30%) Sodium Persulfate and organic carboxyl acid vinylformic acid respectively, reaction was stirred 1.5 hours, was incubated 1 hour.
Embodiment 2:
Choose raw material by weight percentage:
Organic carboxyl acid 18%
Amide containing compounds 15%
Contain sulfonic group compounds 3%
Mineral compound 3%
The deionized water surplus
With amide containing compounds acrylamide, contain sulfonic group compounds vinyl sulfonic acid, mineral compound Ammonium Persulfate 98.5 and deionized water and be mixed in proportion successively and add.When being heated to 60 ℃, drip mineral compound Ammonium Persulfate 98.5 and organic carboxyl acid toxilic acid respectively, reaction was stirred 2 hours, was incubated 1 hour.
Embodiment 3:
Choose raw material by weight percentage
Organic carboxyl acid 50%
Amide containing compounds 10%
Contain sulfonic group compounds 1%
Mineral compound 2%
The deionized water surplus
With amide containing compounds propyl methyl acid amides, contain sulfonic group compounds sodium lignosulfonate, mineral compound sodium bisulfite and deionized water and be mixed in proportion successively and add.When being heated to 65 ℃, drip mineral compound sodium bisulfite and organic carboxyl acid methylene-succinic acid respectively, reaction was stirred 2.5 hours, was incubated 1.5 hours.
Application test and result
The antisludging agent for osmosis-reverse membrane kind is more in the market, and we select the MDC200 of representative A company and the EAT of MDC150 Scale inhibitors and B company for use
50 and EAT
250 serial Scale inhibitorss have carried out resistance lime carbonate performance relatively.
1, test sample source
See Table 1
Table 1 test sample source
| Business Name | The medicament title |
| Product of the present invention | TM-400 |
| A company | MDC200 |
| MDC150 | |
| B company | EAT 50 |
| EAT 250 |
2, resistance lower concentration lime carbonate test
2.1 test water: water distribution: Ca
2+240mg/L; HCO
- 3732mg/L.
2.2 test conditions: water temperature: 50 ± 1 ℃, time: 10h, dosing: 4mg/L.
2.3 test method: see GB16632-1996
2.4 test calculation formula: scale inhibition performance=(C-C
0)/(C
1-C
0) * 100%
C: actual measurement Ca
2Concentration
C
0: the Ca of blank sample
2Concentration
C
1: the Ca in the former water
2Concentration
2.5 test-results: see Table 2
Table 2 lower concentration lime carbonate scale inhibition performance
| Business Name | The medicament title | Scale inhibition performance % |
| Product of the present invention | TM-400 | 100 |
| A company | MDC200 | 86.31 |
| MDC150 | 95.25 | |
| B company | EAT 50 | 90.92 |
| EAT 250 | 96.66 |
3, resistance high density carbonic acid CAL
2.1 test water: water distribution: Ca
2+960mg/L; HCO
- 32928mg/L.
2.2 test conditions: water temperature: 50 ± 1 ℃, time: 10h, dosing: 15mg/L
2.3 test method: see GB16632-1996
2.4 test calculation formula: scale inhibition performance=(C-C
0)/(C
1-C
0) * 100%
C: actual measurement Ca
2Concentration
C
0: the Ca of blank sample
2Concentration
C
1: the Ca in the former water
2Concentration
2.5 test-results: see Table 2
Table 2 high density carbonic acid calcium scale inhibition performance
| Business Name | The medicament title | Scale inhibition performance % |
| Product of the present invention | TM-400 | 70.15 |
| A company | MDC200 | 48.63 |
| MDC150 | 65.65 | |
| B company | EAT 50 | 60.63 |
| EAT 250 | 67.69 |
From the scale inhibition performance of resistance lower concentration lime carbonate and high density carbonic acid calcium as can be seen, the practical application effect of product TM-400 of the present invention has reached the calcium carbonate scaling of requirement the present invention can stop to(for) reverse osmosis membrane fully.
Claims (2)
1, a kind of reverse osmosis membrane antisludging agent and preparation method thereof is characterized in that:
Its composition comprises organic carboxyl acid, amide containing compounds, contains sulfonic group compounds, mineral compound and deionized water, and wherein each weight percentages of components is:
Organic carboxyl acid 10-60%
Amide containing compounds 10-30%
Contain sulfonic group compounds 1-10%
Mineral compound 1-20%
The deionized water surplus
Described organic carboxyl acid is selected from vinylformic acid, toxilic acid, methylene-succinic acid; The amide containing compounds is selected from 2-acrylamide-2-methyl-propyl sulfonic acid, acrylamide, propyl methyl acid amides; Contain the sulfonic group compounds and be selected from sulfonated phenylethylene, vinyl sulfonic acid, sodium lignosulfonate; Mineral compound is selected from Sodium Persulfate, Ammonium Persulfate 98.5, sodium bisulfite; Selected water is deionized water;
Its preparation method for the amide containing compounds, contain the sulfonic group compounds, account for the mineral compound of inorganics total amount 70% and water and be mixed in proportion successively and add, when being heated to 50 ℃-90 ℃, drip mineral compound and the organic carboxyl acid that accounts for inorganics total amount 30% respectively, reaction was stirred 1.5-3.5 hour, be incubated 1-4 hour, promptly get product, the products molecule weight range is 1500-3500, and the dosing weight range is at 3ppm-15ppm in the actual water treatment applications of reverse osmosis membrane.
2, according to described reverse osmosis membrane antisludging agent of claim 1 and preparation method thereof, it is characterized in that:
It forms each weight percentages of components:
Organic carboxyl acid 15-55%
Amide containing compounds 12-28%
Contain sulfonic group compounds 2-8%
Mineral compound 2-18%
The deionized water surplus
Described organic carboxyl acid is selected from vinylformic acid, toxilic acid; The amide containing compounds is selected from 2-acrylamide-2-methyl-propyl sulfonic acid, acrylamide; Contain the sulfonic group compounds and be selected from sulfonated phenylethylene, vinyl sulfonic acid; Mineral compound is selected from Sodium Persulfate, Ammonium Persulfate 98.5; Selected water is deionized water;
Its preparation method for the amide containing compounds, contain the sulfonic group compounds, account for the mineral compound of inorganics total amount 70% and water and be mixed in proportion successively and add, when being heated to 55 ℃-85 ℃, drip mineral compound and the organic carboxyl acid that accounts for inorganics total amount 30% respectively, reaction was stirred 2-3 hour, be incubated 2-3 hour, promptly get product, the products molecule weight range is 2000-3000, and the dosing weight range is at 5ppm-12ppm in actual applications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101296709A CN100418905C (en) | 2006-11-29 | 2006-11-29 | Reverse osmosis membrane anti-scaling agent and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101296709A CN100418905C (en) | 2006-11-29 | 2006-11-29 | Reverse osmosis membrane anti-scaling agent and its preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN1970460A true CN1970460A (en) | 2007-05-30 |
| CN100418905C CN100418905C (en) | 2008-09-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817600A (en) * | 2010-04-14 | 2010-09-01 | 董建敏 | Method for preparing scale inhibitor for seawater desalination reverse osmosis (RO) |
| CN104043338A (en) * | 2014-06-30 | 2014-09-17 | 山东黄三角环保科技产业园有限公司 | Anti-scaling agent special for seawater and brackish water desalination reverse osmosis membrane and preparation method of anti-scaling agent |
| CN107857375A (en) * | 2017-09-29 | 2018-03-30 | 南京悠谷新材料科技有限公司 | A kind of preparation method of sewage corrosion inhibiting and descaling agent |
| CN109095627A (en) * | 2018-07-26 | 2018-12-28 | 锐达工业科技（南京）有限公司 | A kind of recirculated water research of non-phosphorus scale inhibitor and preparation method thereof |
| CN109970219A (en) * | 2019-04-03 | 2019-07-05 | 天津市中海水处理科技有限公司 | Reverse osmosis antisludging agent and its preparation method and application |
| CN114159976A (en) * | 2021-09-24 | 2022-03-11 | 南京开广化工有限公司 | Reverse osmosis scale inhibitor and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2042341C (en) * | 1990-05-23 | 2001-06-12 | Judy H. Bardsley | Silica scale inhibition |
| CN1054357C (en) * | 1995-04-26 | 2000-07-12 | 化学工业部天津化工研究院 | New-type scale-inhibiting dispersion agent for water treatment |
| JP2005264407A (en) * | 2004-03-22 | 2005-09-29 | Hakuto Co Ltd | Inhibitor for calcium oxalate scale and method for inhibiting the same scale |
-
2006
- 2006-11-29 CN CNB2006101296709A patent/CN100418905C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817600A (en) * | 2010-04-14 | 2010-09-01 | 董建敏 | Method for preparing scale inhibitor for seawater desalination reverse osmosis (RO) |
| CN104043338A (en) * | 2014-06-30 | 2014-09-17 | 山东黄三角环保科技产业园有限公司 | Anti-scaling agent special for seawater and brackish water desalination reverse osmosis membrane and preparation method of anti-scaling agent |
| CN104043338B (en) * | 2014-06-30 | 2015-12-02 | 山东黄三角环保科技产业园有限公司 | Seawater and brackish water desalination reverse osmosis membrane antisludging agent and preparation technology thereof |
| CN107857375A (en) * | 2017-09-29 | 2018-03-30 | 南京悠谷新材料科技有限公司 | A kind of preparation method of sewage corrosion inhibiting and descaling agent |
| CN109095627A (en) * | 2018-07-26 | 2018-12-28 | 锐达工业科技（南京）有限公司 | A kind of recirculated water research of non-phosphorus scale inhibitor and preparation method thereof |
| CN109970219A (en) * | 2019-04-03 | 2019-07-05 | 天津市中海水处理科技有限公司 | Reverse osmosis antisludging agent and its preparation method and application |
| CN114159976A (en) * | 2021-09-24 | 2022-03-11 | 南京开广化工有限公司 | Reverse osmosis scale inhibitor and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN100418905C (en) | 2008-09-17 |
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Owner name: CHINA NATIONAL OFFSHORE OIL CORP.; APPLICANT Free format text: FORMER OWNER: TIANJIN CHEMICAL RESEARCH + DESING INST Effective date: 20071228 |
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Effective date of registration: 20071228 Address after: Zip code 25, Chaoyangmen North Street, Dongcheng District, Beijing: 100010 Applicant after: China National Offshore Oil Corporation Co-applicant after: Tianjin Chemical research &. Design Inst. Address before: Number 85, No. three, g / F, Hongqiao District, Tianjin, China: 300131 Applicant before: Tianjin Chemical research &. Design Inst. |
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Application publication date: 20070530 Assignee: Tianjin Zhengda Technology Co., Ltd. Assignor: Tianjin Chemical research &. Design Inst.|China National Offshore Oil Corporation Contract record no.: 2010120000030 Denomination of invention: Reverse osmosis membrane anti-scaling agent and its preparation method Granted publication date: 20080917 License type: Exclusive License Record date: 20100325 |