CN112850917A - Non-phosphorus scale inhibitor suitable for reverse osmosis and preparation method thereof - Google Patents
Non-phosphorus scale inhibitor suitable for reverse osmosis and preparation method thereof Download PDFInfo
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- CN112850917A CN112850917A CN202011487806.XA CN202011487806A CN112850917A CN 112850917 A CN112850917 A CN 112850917A CN 202011487806 A CN202011487806 A CN 202011487806A CN 112850917 A CN112850917 A CN 112850917A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
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- Chemical Kinetics & Catalysis (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)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A non-phosphorus scale inhibitor suitable for reverse osmosis and a preparation method thereof comprise the following substances in parts by weight: 15-35 parts of polyaspartic acid, 15-30 parts of polyepoxysuccinic acid, 15-30 parts of sulfonate copolymer, 5-10 parts of terpolymer, 5-10 parts of polymaleic anhydride and 0-30 parts of deionized water. The phosphorus-free scale inhibitor does not contain organic phosphine and inorganic phosphoric acid (salt), thereby reducing the breeding of bacteria and algae and the adhesion of slime, reducing the pollution of a reverse osmosis membrane and causing no secondary damage to the environment; the phosphorus-free scale inhibitor has excellent sulfate scale and carbonate scale inhibition performance, and can effectively improve the scale inhibition effect while ensuring environmental protection; meanwhile, the raw materials used in the invention are all easily biodegradable, are convenient for subsequent treatment, can be directly used for landfill and the like after being biodegraded, cannot cause environmental pollution due to waste landfill, and effectively protect the environment.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a non-phosphorus scale inhibitor suitable for reverse osmosis and a preparation method thereof.
Background
Reverse osmosis is one of the most mature physical desalination technologies in the existing water treatment desalination process. The reverse osmosis membrane element is more and more applied to industrial production in the design and use processes, conditions such as water source conditions, water use requirements and the like of different users are differentiated, reverse osmosis water treatment systems with different process flows are formed, if the process design is incomplete or the operation is improper, and chemical additives are incompatible with water sources, the water yield and the water quality of the reverse osmosis system are reduced, and a main element in the reverse osmosis system, namely the reverse osmosis membrane element, is scrapped in advance in severe cases, so that the protection of the reverse osmosis membrane element is particularly important in the whole system design and operation processes.
The reverse osmosis process belongs to the physical desalting technology, and has the principle that the phenomenon of osmosis under natural conditions is utilized, raw water is given with certain pressure (higher than osmotic pressure), water molecules are separated from insoluble substances and most of salts in the raw water through a semipermeable membrane which is made of a high molecular organic material and has selective permeation, the salts and the insoluble substances are concentrated in a water inlet/concentrated water channel along with permeation of fresh water, some insoluble salts tend to scale along with increase of concentration times, and in order to prevent the scale from occurring, a scale inhibiting dispersant is often added into the reverse osmosis inlet water to inhibit the generation of scales. Most of the currently common reverse osmosis scale inhibitors are inorganic polyphosphate, organic phosphate polymer and other scale inhibitors. Although the phosphorus-containing scale inhibitor has a good scale inhibition effect, the phosphorus-containing scale inhibitor is easy to form an insoluble compound or calcium phosphate precipitate with calcium ions, so that the scale inhibition effect of the scale inhibitor is reduced, and the formation of other scales is easily induced. And the production of the phosphorus scale inhibitor needs to consume a large amount of phosphorus compounds, and the compounds can be finally discharged as waste, thereby causing serious pollution to the environment. On the premise, the research and development of the environment-friendly scale inhibitor becomes the research focus in the field of scale inhibitors.
Disclosure of Invention
The invention provides a non-phosphorus scale inhibitor suitable for reverse osmosis, which is used for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
a non-phosphorus scale inhibitor suitable for reverse osmosis comprises the following substances in parts by weight:
15-35 parts of polyaspartic acid, 15-30 parts of polyepoxysuccinic acid, 15-30 parts of sulfonate copolymer, 5-10 parts of terpolymer, 5-10 parts of polymaleic anhydride and 0-30 parts of deionized water.
The phosphate-free scale inhibitor suitable for reverse osmosis is a mixture of any one or more than two of methacrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, itaconic acid-styrene sulfonic acid copolymer and hydroxypropyl acrylate-allylsulfonic acid-2-hydroxy-2-allyloxy-2-propanesulfonic acid copolymer mixed in any proportion.
The phosphorus-free scale inhibitor suitable for reverse osmosis is prepared by mixing any one or a mixture of any two or more of itaconic acid-methacrylic acid-hydroxyethyl acrylate copolymer, itaconic acid-maleic acid-polyoxyethylene monobutyl ether copolymer and acrylic acid-maleic anhydride-acrylamide copolymer in any proportion.
The preparation process of the phosphorus-free scale inhibitor suitable for reverse osmosis comprises the following steps:
the method comprises the following steps: weighing polyaspartic acid, polyepoxysuccinic acid, sulfonate copolymer, terpolymer, polymaleic anhydride and deionized water according to the weight ratio;
step two: sequentially adding polyaspartic acid, polyepoxysuccinic acid, sulfonate copolymer, terpolymer and polymaleic anhydride into a reactor, and stirring uniformly in advance;
step three: adding deionized water into the reactor, and stirring for 20-40min at room temperature;
step four: filtering and packaging to obtain the finished product of the phosphorus-free scale inhibitor.
The phosphorus-free scale inhibitor suitable for reverse osmosis is characterized in that: the stirring speed in the third step is 800-1500 r/min.
The invention has the advantages that: the phosphorus-free scale inhibitor does not contain organic phosphine and inorganic phosphoric acid (salt), thereby reducing the breeding of bacteria and algae and the adhesion of slime, reducing the pollution of a reverse osmosis membrane and causing no secondary damage to the environment; the phosphorus-free scale inhibitor has excellent sulfate scale and carbonate scale inhibition performance, and can effectively improve the scale inhibition effect while ensuring environmental protection; meanwhile, the raw materials used in the invention are all easily biodegradable, are convenient for subsequent treatment, can be directly used for landfill and the like after being biodegraded, cannot cause environmental pollution due to waste landfill, and effectively protect the environment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the method comprises the steps of accurately weighing 15g of polyaspartic acid, 30g of polyepoxysuccinic acid, 15g of methacrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 10g of itaconic acid-methacrylic acid-hydroxyethyl acrylate copolymer, 10g of polymaleic anhydride and 20g of deionized water;
sequentially adding substances except deionized water into the reaction kettle;
thirdly, adding deionized water into the reaction kettle;
fourthly, stirring for 20 minutes at room temperature;
and fifthly, filtering and packaging to obtain the non-phosphorus scale inhibitor for reverse osmosis.
Example 2:
the method comprises the steps of accurately weighing 35g of polyaspartic acid, 15g of polyepoxysuccinic acid, 25g of itaconic acid-styrene sulfonic acid copolymer, 5g of itaconic acid-methacrylic acid-hydroxyethyl acrylate copolymer, 5g of polymaleic anhydride and 15g of deionized water;
sequentially adding substances except deionized water into the reaction kettle;
thirdly, adding deionized water into the reaction kettle;
fourthly, stirring for 40 minutes at room temperature;
and fifthly, filtering and packaging to obtain the non-phosphorus scale inhibitor for reverse osmosis.
Example 3:
the method comprises the steps of accurately weighing 20g of polyaspartic acid, 20g of polyepoxysuccinic acid, 11g of methacrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 5g of hydroxypropyl acrylate-allylsulfonic acid-2-hydroxy-2-allyloxy-2-propanesulfonic acid copolymer, 6g of acrylic acid-maleic anhydride-acrylamide copolymer, 8g of polymaleic anhydride and 30g of deionized water;
sequentially adding substances except deionized water into the reaction kettle;
thirdly, adding deionized water into the reaction kettle;
fourthly, stirring for 30 minutes at room temperature;
and fifthly, filtering and packaging to obtain the non-phosphorus scale inhibitor for reverse osmosis.
Example 4:
the method comprises the steps of accurately weighing 20g of polyaspartic acid, 30g of polyepoxysuccinic acid, 30g of itaconic acid-styrene sulfonic acid copolymer, 6.5g of itaconic acid-maleic acid-polyoxyethylene monobutyl ether copolymer, 3.5g of acrylic acid-maleic anhydride-acrylamide copolymer and 10g of polymaleic anhydride;
sequentially adding substances except deionized water into the reaction kettle;
stirring the mixture at room temperature for 35 minutes;
and fourthly, filtering and packaging to obtain the reverse osmosis phosphorus-free scale inhibitor.
The non-phosphorus scale inhibitor for reverse osmosis prepared in the examples 1 to 4 is compared with static scale inhibition performance comparison tests (calcium carbonate scale inhibition and calcium sulfate scale inhibition) prepared in the comparative examples 1 to 3, and compared with the scale inhibition static tests by water distribution according to GB/T16632-. In the calcium sulfate scale inhibition experiment, the calcium ion concentration is 1000mg/L, the sulfate ion concentration is 17000mg/L, and the medicament concentration is 4mg/L, and the results are shown in the table I.
Watch 1
The data in the table I show that the finished products of the embodiments 1 to 4 of the invention have higher calcium carbonate scale inhibition rate and calcium sulfate scale inhibition rate than polyaspartic acid, polyepoxysuccinic acid and commercially available PO-100, and the products prepared by the invention do not contain organic phosphine and inorganic phosphoric acid (salt), thereby reducing the breeding of bacteria and algae and the adhesion of slime, reducing the pollution of reverse osmosis membranes, meanwhile, the products of the invention can be biodegraded, are convenient for subsequent treatment, do not influence the environment in treatment, and are convenient for wide popularization and application.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A non-phosphorus scale inhibitor suitable for reverse osmosis is characterized in that: the composition comprises the following substances in parts by weight:
15-35 parts of polyaspartic acid, 15-30 parts of polyepoxysuccinic acid, 15-30 parts of sulfonate copolymer, 5-10 parts of terpolymer, 5-10 parts of polymaleic anhydride and 0-30 parts of deionized water.
2. The non-phosphorus scale inhibitor suitable for reverse osmosis according to claim 1, wherein: the sulfonate copolymer is any one or a mixture of any two or more of methacrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, itaconic acid-styrene sulfonic acid copolymer and hydroxypropyl acrylate-allylsulfonic acid-2-hydroxy-2-allyloxy-2-propanesulfonic acid copolymer in any proportion.
3. The non-phosphorus scale inhibitor suitable for reverse osmosis according to claim 1, wherein: the terpolymer is any one or a mixture of more than two of itaconic acid-methacrylic acid-hydroxyethyl acrylate copolymer, itaconic acid-maleic acid-polyoxyethylene monobutyl ether copolymer and acrylic acid-maleic anhydride-acrylamide copolymer which are mixed in any proportion.
4. The non-phosphorus scale inhibitor suitable for reverse osmosis according to claim 1, wherein: the preparation process comprises the following steps:
the method comprises the following steps: weighing polyaspartic acid, polyepoxysuccinic acid, sulfonate copolymer, terpolymer, polymaleic anhydride and deionized water according to the weight ratio;
step two: sequentially adding polyaspartic acid, polyepoxysuccinic acid, sulfonate copolymer, terpolymer and polymaleic anhydride into a reactor, and stirring uniformly in advance;
step three: adding deionized water into the reactor, and stirring for 20-40min at room temperature;
step four: filtering and packaging to obtain the finished product of the phosphorus-free scale inhibitor.
5. The non-phosphorus scale inhibitor suitable for reverse osmosis according to claim 1, wherein: the stirring speed in the third step is 800-1500 r/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011487806.XA CN112850917A (en) | 2020-12-16 | 2020-12-16 | Non-phosphorus scale inhibitor suitable for reverse osmosis and preparation method thereof |
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| CN202011487806.XA CN112850917A (en) | 2020-12-16 | 2020-12-16 | Non-phosphorus scale inhibitor suitable for reverse osmosis and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634129A (en) * | 2021-10-19 | 2021-11-12 | 山东天庆科技发展有限公司 | Reverse osmosis scale inhibitor suitable for high-alkalinity environment and preparation method thereof |
| CN113735321A (en) * | 2021-09-13 | 2021-12-03 | 北京可林维尔化工有限公司 | Reverse osmosis scale inhibitor and preparation method and application thereof |
| CN113912195A (en) * | 2021-11-10 | 2022-01-11 | 山东天庆科技发展有限公司 | Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof |
| CN114988591A (en) * | 2022-06-29 | 2022-09-02 | 威海瑞能电力工程有限公司 | Novel phosphorus-free reverse osmosis scale inhibitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767885A (en) * | 2010-01-12 | 2010-07-07 | 张文宇 | Phosphorus-free corrosion and scale inhibitor |
| US20160326036A1 (en) * | 2014-01-03 | 2016-11-10 | Guangzhou Special Pressure Equipment Inspection And Research Institute | Terpolymerized corrosion and scale inhibitor used in circulating cooling water of central air conditioning and its preparation method |
| CN109354219A (en) * | 2018-08-29 | 2019-02-19 | 天津正达科技有限责任公司 | A kind of research of non-phosphorus scale inhibitor suitable for saline-alkali water counter-infiltration system |
-
2020
- 2020-12-16 CN CN202011487806.XA patent/CN112850917A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767885A (en) * | 2010-01-12 | 2010-07-07 | 张文宇 | Phosphorus-free corrosion and scale inhibitor |
| US20160326036A1 (en) * | 2014-01-03 | 2016-11-10 | Guangzhou Special Pressure Equipment Inspection And Research Institute | Terpolymerized corrosion and scale inhibitor used in circulating cooling water of central air conditioning and its preparation method |
| CN109354219A (en) * | 2018-08-29 | 2019-02-19 | 天津正达科技有限责任公司 | A kind of research of non-phosphorus scale inhibitor suitable for saline-alkali water counter-infiltration system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735321A (en) * | 2021-09-13 | 2021-12-03 | 北京可林维尔化工有限公司 | Reverse osmosis scale inhibitor and preparation method and application thereof |
| CN113634129A (en) * | 2021-10-19 | 2021-11-12 | 山东天庆科技发展有限公司 | Reverse osmosis scale inhibitor suitable for high-alkalinity environment and preparation method thereof |
| CN113912195A (en) * | 2021-11-10 | 2022-01-11 | 山东天庆科技发展有限公司 | Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof |
| CN114988591A (en) * | 2022-06-29 | 2022-09-02 | 威海瑞能电力工程有限公司 | Novel phosphorus-free reverse osmosis scale inhibitor |
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Application publication date: 20210528 |
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