CN111777200A - Scale and corrosion inhibitor for water treatment - Google Patents
Scale and corrosion inhibitor for water treatment Download PDFInfo
- Publication number
- CN111777200A CN111777200A CN202010691681.6A CN202010691681A CN111777200A CN 111777200 A CN111777200 A CN 111777200A CN 202010691681 A CN202010691681 A CN 202010691681A CN 111777200 A CN111777200 A CN 111777200A
- Authority
- CN
- China
- Prior art keywords
- parts
- scale
- corrosion inhibitor
- reaction product
- sodium hydroxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C02F5/125—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 combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- 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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a scale and corrosion inhibitor for water treatment, which is mainly prepared from the following components in percentage by mass: 10-20 parts of maleic anhydride, 30-35 parts of ammonium lignosulfonate, 47-55 parts of sodium hydroxide solution and water; the corrosion and scale inhibitor of the invention contains sodium lignosulfonate and polyaspartic acid which can act synergistically, so that the performance of the corrosion and scale inhibitor is improved, and the corrosion and scale inhibitor does not contain phosphorus, is easy to degrade and belongs to an environment-friendly reagent.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a scale and corrosion inhibitor for water treatment.
Background
Fresh water resources are necessary resources for human life, and industrial discharge can cause fresh water to be polluted and cannot be drunk, so that the industry strongly advocates the use of circulating water resources, various impurity ions can be slowly accumulated in circulating water, circulating water pipelines can be corroded by the impurities, precipitates are generated and deposited in the pipelines to form dirt, a circulating water system is damaged, and the service life is short.
In order to solve the technical problems in the prior art, scale and corrosion inhibitors are added into circulating water to delay the corrosion of pipelines and inhibit scaling. The commonly used scale and corrosion inhibitor at present is an organic phosphonic acid scale and corrosion inhibitor, the organic phosphonic acid has excellent chelating capacity to a plurality of metal ions, the organic phosphonic acid solves the problem that the system generates calcium carbonate scale, and can form a protective film on the metal surface to delay the corrosion of a pipeline; however, the organic phosphonic acid can not effectively inhibit the deposition of calcium phosphate scale, zinc scale and ferric oxide generated in the phosphorus system and phosphorus-zinc system water treatment formulas, and the phosphorus-containing wastewater discharge causes the problems of water eutrophication and ocean red tide.
Therefore, there is a need to provide a new technical solution to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a scale and corrosion inhibitor for water treatment, which can effectively solve the technical problems.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
a scale and corrosion inhibitor for water treatment is mainly prepared from the following components in percentage by mass:
maleic anhydride: 10-20 parts of
Ammonium lignosulfonate: 30-35 parts;
sodium hydroxide solution: 47-55 parts of a binder;
the balance of water.
Preferably, the preparation method is as follows:
the method comprises the following steps: putting 30-35 parts of ammonium lignosulphonate and 28-32 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 60-70 ℃, reacting for 2-4 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 10-20 parts of maleic anhydride into the reaction product I, and performing microwave irradiation for 0.3-0.7 hour; obtaining a reaction product II;
step three: and adding 19-23 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a water bath kettle at 50-70 ℃ for reaction for 1-3 hours to obtain the scale and corrosion inhibitor with the pH value of 7-11.
Preferably, the concentration of the sodium hydroxide solution is 2 mol/L.
Preferably, the microwave radiation power in the second step is 800-900W.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, firstly, ammonium lignosulfonate reacts with sodium hydroxide to obtain an aqueous solution containing sodium lignosulfonate and ammonium ions, then maleic anhydride reacts with the ammonium ions in the aqueous solution under microwave radiation to obtain an aqueous solution containing polysuccinimide and sodium lignosulfonate, and finally, the polysuccinimide is hydrolyzed by using a sodium hydroxide solution to obtain the corrosion and scale inhibitor containing sodium lignosulfonate and polyaspartic acid.
The sodium lignosulfonate and the polyaspartic acid in the corrosion and scale inhibitor have synergistic effect, so that the performance of the corrosion and scale inhibitor is improved, a compact corrosion inhibition protective film can be formed on the surface of metal, and the corrosion of a pipeline is further slowed down; meanwhile, polyanion in the water can be complexed with metal ions such as calcium, magnesium and the like in water to form a water-soluble complex to inhibit scaling; the water-based paint has good dispersing effect on impurities such as calcium, magnesium, silica scale, ferric oxide and the like in water, so that the water-based paint is suspended in the water more stably and is prevented from depositing; in addition, the corrosion and scale inhibitor does not contain phosphorus, is easy to degrade and belongs to an environment-friendly reagent.
The corrosion and scale inhibitor prepared by the method has the advantages of wide raw material source, low cost, no need of ammonia water, simple process, no emission of waste gas, waste water and waste residue and accordance with the environmental protection requirement.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in 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.
The scale and corrosion inhibitor for water treatment of the present invention will be described in detail below.
Example 1
The invention provides a scale and corrosion inhibitor for water treatment, which is mainly prepared from the following components in percentage by mass:
maleic anhydride: 10 portions of
Ammonium lignosulfonate: 30 parts of (1);
sodium hydroxide solution: 47 parts of;
the balance of water.
The preparation method comprises the following steps:
the method comprises the following steps: putting 30 parts of ammonium lignosulphonate and 28 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 60 ℃, reacting for 2 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 10 parts of maleic anhydride into the reaction product I, and performing microwave irradiation for 0.3 hour; obtaining a reaction product II;
step three: and adding 19 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a water bath kettle at 50 ℃ for reaction for 1 hour to obtain the scale and corrosion inhibitor with the pH value of 7.
Wherein the concentration of the sodium hydroxide solution is 2 mol/L; the microwave radiation power of the microwave irradiation is 800W.
Example 2
The invention provides a scale and corrosion inhibitor for water treatment, which is mainly prepared from the following components in percentage by mass:
maleic anhydride: 13 portions of
Ammonium lignosulfonate: 31 parts of (B);
sodium hydroxide solution: 49 parts;
the balance of water.
The preparation method comprises the following steps:
the method comprises the following steps: putting 31 parts of ammonium lignosulphonate and 29 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 63 ℃, reacting for 2.5 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 13 parts of maleic anhydride into the first reaction product, and performing microwave irradiation for 0.4 hour; obtaining a reaction product II;
step three: and adding 20 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a water bath kettle with the temperature of 55 ℃ for reaction for 1.5 hours to obtain the scale and corrosion inhibitor with the pH value of 8.
Wherein the concentration of the sodium hydroxide solution is 2 mol/L; the microwave radiation power of the microwave irradiation is 830W.
Example 3
The invention provides a scale and corrosion inhibitor for water treatment, which is mainly prepared from the following components in percentage by mass:
maleic anhydride: 15 portions of
Ammonium lignosulfonate: 32 parts of (1);
sodium hydroxide solution: 51 parts of a mixture;
the balance of water.
The preparation method comprises the following steps:
the method comprises the following steps: putting 32 parts of ammonium lignosulphonate and 30 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 65 ℃, reacting for 3 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 15 parts of maleic anhydride into the reaction product I, and performing microwave irradiation for 0.5 hour; obtaining a reaction product II;
step three: and adding 21 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a water bath kettle at the temperature of 60 ℃ for reaction for 2 hours to obtain the scale and corrosion inhibitor with the pH value of 9.
Wherein the concentration of the sodium hydroxide solution is 2 mol/L; the microwave radiation power of the microwave irradiation is 850W.
Example 4
The invention provides a scale and corrosion inhibitor for water treatment, which is mainly prepared from the following components in percentage by mass:
maleic anhydride: 17 portions of
Ammonium lignosulfonate: 33 parts of (B);
sodium hydroxide solution: 53 parts of a mixture;
the balance of water.
The preparation method comprises the following steps:
the method comprises the following steps: putting 33 parts of ammonium lignosulphonate and 31 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 67 ℃, reacting for 3.5 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 17 parts of maleic anhydride into the first reaction product, and performing microwave irradiation for 0.6 hour; obtaining a reaction product II;
step three: and adding 22 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a 65-DEG C water bath to react for 2.5 hours to obtain the scale and corrosion inhibitor with the pH value of 10.
Wherein the concentration of the sodium hydroxide solution is 2 mol/L; the microwave radiation power of the microwave irradiation is 870W.
Example 5
The invention provides a scale and corrosion inhibitor for water treatment, which is mainly prepared from the following components in percentage by mass:
maleic anhydride: 20 portions of
Ammonium lignosulfonate: 35 parts of (B);
sodium hydroxide solution: 55 parts of (1);
the balance of water.
The preparation method comprises the following steps:
the method comprises the following steps: putting 35 parts of ammonium lignosulphonate and 32 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 70 ℃, reacting for 4 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 20 parts of maleic anhydride into the reaction product I, and performing microwave irradiation for 0.7 hour; obtaining a reaction product II;
step three: and adding 23 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a water bath kettle at 70 ℃ for reaction for 3 hours to obtain the scale and corrosion inhibitor with the pH value of 11.
Wherein the concentration of the sodium hydroxide solution is 2 mol/L; the microwave radiation power of the microwave irradiation is 900W.
In order to verify the effect of the invention, the scale and corrosion inhibitor prepared in examples 1-5 was compared with the existing organic phosphonic acid scale and corrosion inhibitor, single polyaspartic acid scale and corrosion inhibitor and single sodium lignosulfonate scale and corrosion inhibitor at the same dosage for scale and corrosion inhibition: the experimental raw water has a pH of 7.65, a turbidity of 35(NTU), calcium ions of 77.6mg/L and magnesium ions of 46.2 mg/L. In the scale inhibition experiment, the dosage of the medicament of the examples 1 to 5 is 30mg/L, the experiment temperature is 80 ℃, and the concentration is 3 times. In the corrosion inhibition (rotary hanging tablet) experiment, the dosage of the medicament of the examples 1 to 5 is 30mg/L, the experiment temperature is 50 ℃, the rotation speed of the hanging tablet is 75 r/min, and the experiment time is 72 hours. The results are shown in table 1:
TABLE 1 comparative experiment results of scale and corrosion inhibitor performance
As can be seen from the experimental results in Table 1, the scale and corrosion inhibitor of the invention has good scale and corrosion inhibition performance, and the scale inhibition rate reaches 99.9%; the corrosion rate of brass reaches 0.0012mm/a, the corrosion rate of carbon steel reaches 0.0011mm/a, and the corrosion rate of stainless steel reaches 0.0014mm/a, which are far less than the corrosion rate requirements of GB 50050 + 2007 design Specification for treatment of circulating cooling water of national Standard of the people's republic of China on brass, carbon steel and stainless steel.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (4)
1. A scale and corrosion inhibitor for water treatment is characterized in that: the paint is mainly prepared from the following components in percentage by mass:
maleic anhydride: 10-20 parts of
Ammonium lignosulfonate: 30-35 parts;
sodium hydroxide solution: 47-55 parts of a binder;
the balance of water.
2. The scale and corrosion inhibitor for water treatment according to claim 1, wherein: the preparation method comprises the following steps:
the method comprises the following steps: putting 30-35 parts of ammonium lignosulphonate and 28-32 parts of sodium hydroxide solution into a reaction kettle, starting stirring, heating to 60-70 ℃, reacting for 2-4 hours, cooling to room temperature, and taking out a reaction product I;
step two: adding 10-20 parts of maleic anhydride into the reaction product I, and performing microwave irradiation for 0.3-0.7 hour; obtaining a reaction product II;
step three: and adding 19-23 parts of sodium hydroxide solution into the reaction product II, and then placing the reaction product II in a water bath kettle at 50-70 ℃ for reaction for 1-3 hours to obtain the scale and corrosion inhibitor with the pH value of 7-11.
3. The scale and corrosion inhibitor for water treatment according to claim 1 or 2, wherein: the concentration of the sodium hydroxide solution is 2 mol/L.
4. The scale and corrosion inhibitor for water treatment according to claim 2, wherein: the microwave radiation power in the second step is 800-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691681.6A CN111777200A (en) | 2020-07-17 | 2020-07-17 | Scale and corrosion inhibitor for water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691681.6A CN111777200A (en) | 2020-07-17 | 2020-07-17 | Scale and corrosion inhibitor for water treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111777200A true CN111777200A (en) | 2020-10-16 |
Family
ID=72763418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010691681.6A Pending CN111777200A (en) | 2020-07-17 | 2020-07-17 | Scale and corrosion inhibitor for water treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111777200A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884141A (en) * | 2006-07-05 | 2006-12-27 | 太原理工大学 | Biodegradable composite corrosion and scale inhibitor and method for preparing same |
| US20080206126A1 (en) * | 2007-02-28 | 2008-08-28 | Robert Benson | Higher than 30% concentration lime slurries, preparation and uses thereof |
| CN101575413A (en) * | 2009-06-08 | 2009-11-11 | 西安建筑科技大学 | Method for synthesizing green scale inhibitor poly-asparagic acid through microwaves |
| CN106242097A (en) * | 2016-08-30 | 2016-12-21 | 山东胜伟园林科技有限公司 | A kind of low-phosphorus antiincrustation agent and preparation method thereof |
| CN106698687A (en) * | 2015-08-05 | 2017-05-24 | 中国石油化工股份有限公司 | Compound scale and corrosion inhibitor and application thereof in treatment of circulating cooling water |
| CN108862642A (en) * | 2018-06-28 | 2018-11-23 | 芜湖市棠华建材科技有限公司 | The preparation method of modified polyaspartic acid scale inhibitor |
-
2020
- 2020-07-17 CN CN202010691681.6A patent/CN111777200A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884141A (en) * | 2006-07-05 | 2006-12-27 | 太原理工大学 | Biodegradable composite corrosion and scale inhibitor and method for preparing same |
| US20080206126A1 (en) * | 2007-02-28 | 2008-08-28 | Robert Benson | Higher than 30% concentration lime slurries, preparation and uses thereof |
| CN101575413A (en) * | 2009-06-08 | 2009-11-11 | 西安建筑科技大学 | Method for synthesizing green scale inhibitor poly-asparagic acid through microwaves |
| CN106698687A (en) * | 2015-08-05 | 2017-05-24 | 中国石油化工股份有限公司 | Compound scale and corrosion inhibitor and application thereof in treatment of circulating cooling water |
| CN106242097A (en) * | 2016-08-30 | 2016-12-21 | 山东胜伟园林科技有限公司 | A kind of low-phosphorus antiincrustation agent and preparation method thereof |
| CN108862642A (en) * | 2018-06-28 | 2018-11-23 | 芜湖市棠华建材科技有限公司 | The preparation method of modified polyaspartic acid scale inhibitor |
Non-Patent Citations (1)
| Title |
|---|
| 刘欣: "聚天冬氨酸与木质素磺酸钠复配物的阻垢性能", 《工业用水与废水》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102351328B (en) | Green total organic carbon steel scale and corrosion inhibitor for circulating cooling water system | |
| WO2015101124A1 (en) | Phosphorous-free corrosion and scale inhibitor used in circulating cooling water of central air conditioning, and method of preparing said inhibitor | |
| CN113912195A (en) | Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof | |
| CN112174342B (en) | Corrosion and scale inhibitor and preparation method thereof | |
| CN105036360A (en) | Deoxygenating scale inhibitor and preparation method thereof | |
| CN105036358A (en) | Scale inhibitor for ash flushing water pipe and preparation method of scale inhibitor | |
| CN105481116A (en) | Circulating cooling water corrosion and scale inhibitor and preparation method thereof | |
| CN112047498A (en) | Circulating water phosphorus-free corrosion and scale inhibitor and preparation method thereof | |
| CN111471988A (en) | Prefilming agent and preparation method thereof | |
| CN105036370A (en) | Ultra-temperature circulating water scale inhibitor and preparation method thereof | |
| CN105036365A (en) | Draught fan dedusting stripping scale inhibitor and preparation method thereof | |
| CN112499777A (en) | High-efficiency low-phosphorus scale and corrosion inhibitor and preparation method thereof | |
| CN111777200A (en) | Scale and corrosion inhibitor for water treatment | |
| CN105032193A (en) | Antiosmosis compound scale inhibitor and preparation method thereof | |
| CN104891682A (en) | Environment-friendly and efficient water treatment agent applicable to Cu-Fe sharing system | |
| CN104150617A (en) | Phosphorus-free scale and corrosion inhibitor and preparation method thereof | |
| CN107244752B (en) | Efficient environment-friendly scale and corrosion inhibitor and preparation thereof | |
| CN104140162A (en) | Non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water, and preparation method thereof | |
| CN105032192A (en) | Antisludging agent for low-phosphorous reverse osmosis membrane and preparation method of antisludging agent | |
| CN100575556C (en) | A kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems | |
| CN105038855A (en) | Antisludging agent of catalytic cracking oil slurry system and preparation method of antisludging agent | |
| CN111439852A (en) | Zinc salt corrosion inhibitor and preparation method thereof | |
| CN112811617A (en) | Circulating water scale inhibitor and preparation method thereof | |
| JP2002263690A (en) | Preventing agent against deposition of scale and method for preventing deposition of scale | |
| CN113754081A (en) | Non-phosphorus environment-friendly corrosion and scale inhibitor for cooling water and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201016 |