CN113880265B - Phosphorus-free corrosion and scale inhibitor and preparation method thereof - Google Patents
Phosphorus-free corrosion and scale inhibitor and preparation method thereof Download PDFInfo
- Publication number
- CN113880265B CN113880265B CN202111237989.4A CN202111237989A CN113880265B CN 113880265 B CN113880265 B CN 113880265B CN 202111237989 A CN202111237989 A CN 202111237989A CN 113880265 B CN113880265 B CN 113880265B
- Authority
- CN
- China
- Prior art keywords
- sorbitol
- maleate
- parts
- mixture
- water
- 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.)
- Active
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
- 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
- C02F5/105—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 combined with inorganic substances
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 provides a phosphorus-free corrosion and scale inhibitor, which consists of a sorbitol maleate mixture, zinc chloride, polydimethyldiallyl ammonium chloride and benzotriazole, wherein the molar ratio of sorbitol maleate monoester to sorbitol maleate diester to sorbitol is 0.2-0.6:1: in the range of 0.2-0.5, the three materials form a ring-shaped stable structure through hydrogen bonds, the mutual cooperated poles greatly increase the chelating and dispersing capacity to scale ions such as calcium, magnesium and the like, and a film layer can be formed on the surface of the metal, so that the corrosion inhibition performance to the metal is better. Zinc chloride and benzotriazole can promote the ring structure and the metal chelate to be more stable into a film layer structure, so that the ring structure and the metal chelate are mutually cooperated to improve the corrosion inhibition performance of the product, and polydimethyl diallyl ammonium chloride can promote corrosion inhibition and sterilization and algae removal performance. The scale inhibitor has the advantages of easily available raw materials of each component, mild preparation conditions, strong synergistic ability of each component in scale inhibition and good popularization and application value.
Description
Technical Field
The invention belongs to the technical field of circulating cooling water, and particularly relates to a phosphorus-free corrosion and scale inhibitor.
Background
The recycling of industrial cooling water is the most effective technical scheme for industrial water conservation and is a typical energy-saving and emission-reducing measure. Because of the natural evaporation of water in the water storage tank and the cooling tower during cooling, the concentration of the dissolved salt in the circulating cooling water can be increased, and the concentration multiple of the common industrial cooling water is 3-5 times, so that the salt is easy to form dirt on the heat transfer surface of the cooled equipment, thereby greatly reducing the heat transfer rate of the equipment to cause the temperature change of the production process materials to influence the normal production. The temperature of the general circulating cooling water is just the condition that bacteria and algae which can adhere to the heat transfer surface in the water are easy to grow, the metabolite of the bacteria and algae is easy to corrode the metal heat transfer surface, and meanwhile, the too high salt concentration can corrode the metal, so that the service life of the heat transfer equipment is greatly reduced, and the production cost is increased. The addition of proper amount of corrosion and scale inhibitor to circulating cooling water can maintain the salt in dispersed state in high concentration to prevent scale layer from forming on the heat transfer surface and form protecting film on the heat transfer surface, and reduce the growth of bacteria and algae to delay the corrosion of equipment. The phosphorus-containing corrosion and scale inhibitor is easy to cause the eutrophication of the final sewage to cause environmental pollution, and the development of the economic and degradable green environment-friendly phosphorus-free corrosion and scale inhibitor is the development direction of the field.
CN106745852a discloses a phosphorus-free corrosion and scale inhibitor, which consists of the following formula components in parts by mass: 6-8 parts of lignosulfonate, 5-7 parts of hydrolyzed polymaleic anhydride, 5-9 parts of citrate, 6-8 parts of triethanolamine, 6-8 parts of tannin, 2-4 parts of zinc salt, 5-7 parts of polyepoxysuccinic acid, 4-6 parts of sodium polyacrylate, 4-6 parts of sodium humate, 6-10 parts of zinc sulfate, 6-8 parts of benzotriazole and 2-4 parts of distilled water.
CN100509652C relates to a phosphorus-free corrosion and scale inhibitor, which is used in circulating cooling water and is formed by mixing the following raw materials: 1) polyaspartic acid or/and polyepoxysuccinic acid, 2) polymaleic anhydride, 3) acrylic acid/2-acrylamide-2-methacrylic acid copolymer, 4) zinc salt, 5) natural organic polymer, 6) molybdate and 7) other components. The phosphorus-free corrosion and scale inhibitor has excellent corrosion and scale inhibition and good environmental protection.
CN200510070652.3 discloses a corrosion and scale inhibition technology for copper and copper alloy equipment in a cooling water system, wherein the oil-soluble corrosion inhibitor comprises sorbitan carboxylic acid ester, and the water-soluble dispersing agent comprises polymaleic acid polymer.
CN201611149591.4 discloses a scale-inhibiting dispersant for water scrubber and its usage, the dispersant comprises maleic anhydride, and the emulsifier comprises polyoxyethylene sorbitan monooleate.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects of the prior art and provide an economic and environment-friendly phosphorus-free corrosion and scale inhibitor and a preparation method thereof. The scale inhibitor has the advantages of simple and easily obtained raw materials of each component, mild preparation conditions, strong synergistic ability of each component in scale inhibition and good popularization and application value.
In order to achieve the above purpose, the first aspect of the invention provides a phosphorus-free corrosion and scale inhibitor, which consists of the following components: sorbitol maleate mixture, zinc chloride, polydimethyldiallyl ammonium chloride, benzotriazole and the balance of water; the weight percentages of the components are as follows: 30-70% of maleic acid sorbitol ester mixture, 2-8% of zinc chloride, 1-5% of polydimethyl diallyl ammonium chloride, 0.5-3% of benzotriazole, and the balance of water, wherein the sum of the components is 100%.
In the present invention, the sorbitol maleate mixture consists of sorbitol maleate monoester, sorbitol maleate diester and sorbitol.
Further, the molar ratio of the maleic acid sorbitol monoester, the maleic acid sorbitol diester and the sorbitol is 0.2-0.6:1: in the range of 0.2-0.5. The ratio can lead the three to form a ring-shaped stable structure more easily by hydrogen bonds, and lead the mutual cooperated poles of the three to greatly increase the chelating and dispersing capacity of scale ions such as calcium, magnesium and the like; the scale inhibitor with the annular stable structure can also form a film layer on the surface of metal, and has better corrosion inhibition performance on the metal.
In the invention, the sorbitol maleate mixture is prepared by the following method: (one) a preparation method I: maleic anhydride and sorbitol are used as raw materials to synthesize a mixture of maleic acid sorbitol monoester, maleic acid sorbitol diester and sorbitol under the catalysis of inorganic acid or inorganic base; or (II) a preparation method II: firstly, preparing methyl maleate from maleic acid and methanol, and then, carrying out transesterification reaction on the methyl maleate and sorbitol under the catalysis of inorganic base to obtain sorbitol maleate monoester, sorbitol maleate diester and sorbitol, thus obtaining the sorbitol maleate mixture.
Specifically, the first preparation method of the sorbitol maleate mixture comprises the following steps: adding 100 parts by weight of maleic anhydride, 183-365 parts by weight of sorbitol, then adding 1-5 parts by weight of inorganic acid or inorganic base catalyst, heating to 60-80 ℃, stirring for reaction for 0.5-2 hours, vacuumizing, maintaining the vacuum degree to 70-90 kPa until no water is distilled out, stopping heating, and cooling to obtain light yellow viscous liquid, namely the sorbitol maleate ester mixture.
The sorbitol is industrial sorbitol solid or sorbitol aqueous solution with the mass concentration not lower than 50%, and when the raw material is industrial sorbitol solid, water with the mass equal to that of maleic anhydride is added to uniformly mix the maleic anhydride and the sorbitol;
the inorganic acid or inorganic base catalyst is preferably concentrated sulfuric acid or potassium carbonate.
Specifically, the second preparation method of the sorbitol maleate mixture comprises the following steps: adding 100 parts by weight of maleic anhydride and 32-128 parts by weight of methanol into a reaction kettle, heating to 60-80 ℃ for reflux reaction for 1-2 hours, then distilling off excessive methanol at 70-100 ℃, adding 185-365 parts of sorbitol-containing industrial sorbitol solid into the reaction kettle, adding 1-5 parts of potassium carbonate as a catalyst, heating to 80-90 ℃, stirring for reaction for 0.5-2 hours until methanol is distilled off, stopping heating, cooling to room temperature, adding 30-70 parts of water, and stirring uniformly to obtain light yellow viscous liquid, namely the sorbitol maleate mixture.
The invention also provides a preparation method of the phosphorus-free corrosion and scale inhibitor, which comprises the following steps: sequentially adding a certain mass portion of sorbitol maleate mixture, zinc chloride, polydimethyl diallyl ammonium chloride, benzotriazole and water into a reaction kettle according to a certain proportion, heating to 45-80 ℃ and stirring for reaction for 0.5 hour to obtain a light yellow liquid, thus obtaining the phosphorus-free corrosion and scale inhibitor. The corrosion and scale inhibitor obtained by the invention does not contain any phosphorus-containing compound, the raw materials are easy to obtain, and the product is easy to biodegrade after being discharged; the corrosion and scale inhibitor takes a sorbitol maleate mixture as a main scale inhibition component, zinc chloride, polydimethyldiallyl ammonium chloride and benzotriazole are added to form the phosphorus-free corrosion and scale inhibitor, the zinc chloride provides chelate cations which are easy to form a corrosion inhibition film, N in the benzotriazole can also form a stable corrosion inhibition film with the sorbitol maleate mixture through the actions of hydrogen bonding, complexation and the like, and the polydimethyldiallyl ammonium chloride serving as a cationic surfactant can promote the uniform spreading of the corrosion inhibition film to strengthen the synergistic effect of the components, so that the corrosion inhibition performance of the product is improved, and the polydimethyldiallyl ammonium chloride also has the sterilization and algae removal performances.
The invention also provides application of the phosphorus-free corrosion and scale inhibitor in circulating cooling water.
Compared with the prior art, the corrosion and scale inhibitor is prepared by firstly preparing the mixture of the maleic acid sorbitol ester as the main component of the corrosion and scale inhibitor and then mixing the mixture with zinc chloride, polydimethyldiallyl ammonium chloride and benzotriazole. The scale inhibitor has the advantages of easily available raw materials of each component, mild preparation conditions and strong synergistic ability of each component in scale inhibition. Has good popularization and application value.
Detailed Description
The following is a further description of embodiments of the invention, in conjunction with examples.
And (3) testing corrosion and scale inhibition performance: for total hardness (in CaC0 3 Calculated) 258mg/L, cl - Raw water with the content of 95mg/L and the pH value of 7.89 is evaporated and concentrated to Cl in a constant temperature water bath at the temperature of about 50 DEG C - The content is 800-850 mg/L. Static scale inhibition test and rotary hanging piece corrosion test in GBT18175-2000 are carried out by using the concentrated water, carbon steel standard hanging piece is adopted, and the surface area of a test piece is 28cm 2 Stainless steel standard hanging piece, test piece surface area 28cm 2 A 12-hour sterilization experiment was also performed to test heterotrophic bacteria, sulfate-reducing bacteria, and iron bacteria under the following conditions: ph=8.0 to 9.0, starting bacterial count: 1.2X10 6 And each mL.
The dosage of the corrosion and scale inhibitor is 60mg/L.
The calculation formula of the scale inhibition rate is as follows: the calculation formula of the scale inhibition rate is as follows:
Ca 2+ 0 ca measured in water before test 2+ The concentration of the mixture is mg/L,
Ca 2+ 1 ca measured in water after the test 2+ The concentration of the mixture is mg/L,
Ca 2+ 2 ca measured after blank (i.e. without addition of water treatment agent) test 2+ The concentration of the mixture is mg/L,
the corrosion inhibition rate is calculated according to 8.1 and 8.2 in national standard GBT 18175-2000.
The sterilization rate is calculated according to the change of the bacterial count before and after the test:
Φ＝(N 0 -N)/N 0 ×100％
phi is the sterilization rate (%),
N 0 to the number of bacteria (in/L) of the raw water before the disinfection treatment,
n is the number of bacteria (in/L) in the effluent after the disinfection treatment.
Example 1
Adding 100 parts by mass of maleic anhydride, 190 parts by mass of sorbitol solid, 100 parts by mass of water and 1 part by mass of concentrated sulfuric acid into a reaction kettle, heating to 65 ℃, stirring and reacting for 2 hours, distilling under reduced pressure, and maintaining the vacuum degree of 70kPa until no water is distilled out to obtain about 350 parts by mass of sorbitol maleate mixture;
60 parts by mass of the mixture is taken and added into a reaction kettle, 30 parts of water, 8 parts of zinc chloride, 1 part of polydimethyldiallyl ammonium chloride and 0.5 part of benzotriazole are added under stirring, the mixture is heated to 50 ℃ for reaction for 1.5 hours, and the light yellow liquid phosphorus-free corrosion and scale inhibitor is obtained after cooling. The scale inhibition rate is 97.8%, the corrosion inhibition rate is 91.6% and the sterilization rate is 18% according to the test method.
Example 2
Adding 100 parts by mass of maleic anhydride, 365 parts by mass of sorbitol solid, 100 parts by mass of water and 1 part by mass of concentrated sulfuric acid into a reaction kettle, heating to 80 ℃, stirring and reacting for 1.5 hours, distilling under reduced pressure, and maintaining the vacuum degree of 90kPa until no water is distilled out to obtain about 510 parts by mass of sorbitol maleate mixture;
50 parts by mass of the mixture is taken and added into a reaction kettle, 40 parts of water, 2 parts of zinc chloride, 2 parts of polydimethyldiallyl ammonium chloride and 0.5 part of benzotriazole are added under stirring, the mixture is heated to 45 ℃ for reaction for 2 hours, and the light yellow liquid phosphorus-free corrosion and scale inhibitor is obtained after cooling. The scale inhibition rate is 98.9%, the corrosion inhibition rate is 91.2% and the sterilization rate is 24% according to the test method.
Example 3
Adding 100 parts by mass of maleic anhydride and 272 parts by mass of sorbitol aqueous solution (the sorbitol content is 190 parts), adding 5 parts by mass of potassium carbonate into a reaction kettle, heating to 65 ℃, stirring and reacting for 1 hour, distilling under reduced pressure, and maintaining the vacuum degree of 70kPa until no water is distilled out to obtain about 350 parts by mass of sorbitol maleate ester mixture;
and (3) adding 65 parts by mass of the mixture into a reaction kettle, adding 25 parts by mass of water, 6 parts by mass of zinc chloride, 2 parts by mass of polydimethyldiallyl ammonium chloride and 1 part by mass of benzotriazole into the reaction kettle, heating the mixture to 55 ℃ for reaction for 1 hour, and cooling the mixture to obtain the light yellow liquid phosphorus-free corrosion and scale inhibitor. The scale inhibition rate is 97.9%, the corrosion inhibition rate is 92.1% and the sterilization rate is 28% according to the test method.
Example 4
100 parts of maleic anhydride and 40 parts of methanol by mass are heated to 60 ℃ for reflux reaction for 2 hours, then excessive methanol is distilled off at 80 ℃, then 200 parts of sorbitol solid is added into a reaction kettle, 5 parts of potassium carbonate is added into the reaction kettle, the temperature is heated to 80-90 ℃ and stirred for reaction for 1 hour, distilled until no methanol is distilled off, 50 parts of water is added in after cooling, and a mixture of sorbitol maleate of about 320 parts by mass is obtained after stirring uniformly;
70 parts by mass of the mixture is taken and added into a reaction kettle, 20 parts of water, 4 parts of zinc chloride, 3 parts of polydimethyldiallyl ammonium chloride and 1 part of benzotriazole are added under stirring, the mixture is heated to 55 ℃ for reaction for 1 hour, and the light yellow liquid phosphorus-free corrosion and scale inhibitor is obtained after cooling. The scale inhibition rate is 97.2%, the corrosion inhibition rate is 90.7% and the sterilization rate is 32% according to the test method.
Comparative example 1
Adding 50 parts by mass of maleic sorbitol monoester into a reaction kettle, adding 40 parts by mass of water, 2 parts by mass of zinc chloride, 2 parts by mass of polydimethyldiallyl ammonium chloride and 0.5 part by mass of benzotriazole into the reaction kettle, heating the mixture to 45 ℃ for reaction for 2 hours, and cooling the mixture to obtain the light yellow liquid phosphorus-free corrosion and scale inhibitor. The scale inhibition rate is 78.9% and the corrosion inhibition rate is 87.2% according to the test method. The sterilization rate is 28%.
Comparative example 2
Adding 50 parts by mass of sorbitol maleate diester and sorbitol into a reaction kettle, adding 40 parts by mass of water, 2 parts by mass of zinc chloride, 2 parts by mass of polydimethyl diallyl ammonium chloride and 0.5 part by mass of benzotriazole into the reaction kettle, heating the mixture to 45 ℃ for reacting for 2 hours, and cooling the mixture to obtain the light yellow liquid phosphorus-free corrosion and scale inhibitor. The scale inhibition rate is 88.5% and the corrosion inhibition rate is 89.1% according to the test method. The sterilization rate is 27%.
Claims (2)
1. The preparation method of the phosphorus-free corrosion and scale inhibitor is characterized by comprising the following steps of: sequentially adding a certain mass portion of sorbitol maleate mixture, zinc chloride, polydimethyldiallyl ammonium chloride, benzotriazole and water into a reaction kettle according to a certain proportion, heating to 45-80 ℃ and stirring for reacting for 0.5 hour to obtain a light yellow liquid, thus obtaining the phosphorus-free corrosion and scale inhibitor; the weight percentages of the components are as follows: 30-70% of maleic acid sorbitol ester mixture, 2-8% of zinc chloride, 1-5% of polydimethyl diallyl ammonium chloride, 0.5-3% of benzotriazole, and the balance of water, wherein the sum of the components is 100%;
the sorbitol maleate mixture consists of sorbitol maleate monoester, sorbitol maleate diester and sorbitol, and the molar ratio of the sorbitol maleate monoester to the sorbitol maleate diester to the sorbitol is 0.2-0.6:1: in the range of 0.2-0.5, the ratio can lead the three to form a ring-shaped stable structure more easily through hydrogen bonds;
the sorbitol maleate mixture is obtained by the following preparation method one or the following preparation method two:
the first preparation method of the sorbitol maleate mixture comprises the following steps: adding 100 parts by weight of maleic anhydride and 183-365 parts by weight of sorbitol into a reaction kettle, uniformly mixing, then adding 1-5 parts by weight of inorganic acid or inorganic base catalyst, heating to 60-80 ℃, stirring for reaction for 0.5-2 hours, vacuumizing, maintaining the vacuum degree to 70-90 kPa until no water is distilled out, stopping heating, and cooling to obtain light yellow viscous liquid, namely the sorbitol maleate ester mixture;
the second preparation method of the sorbitol maleate mixture comprises the following steps: adding 100 parts by weight of maleic anhydride and 32-128 parts by weight of methanol into a reaction kettle, heating to 60-80 ℃ for reflux reaction for 1-2 hours, then distilling off excessive methanol at 70-100 ℃, adding 185-365 parts of sorbitol-containing industrial sorbitol solid into the reaction kettle, adding 1-5 parts of potassium carbonate as a catalyst, heating to 80-90 ℃, stirring for reaction for 0.5-2 hours until methanol is distilled off, stopping heating, cooling to room temperature, adding 30-70 parts of water, and stirring uniformly to obtain light yellow viscous liquid, namely the sorbitol maleate mixture.
2. The method for preparing a phosphorus-free corrosion and scale inhibitor according to claim 1, wherein in the first method for preparing a mixture of sorbitol maleate, sorbitol is an industrial sorbitol solid or a sorbitol aqueous solution with a mass concentration of not less than 50%, and when the raw material is an industrial sorbitol solid, water with the mass equal to that of maleic anhydride is added to uniformly mix maleic anhydride and sorbitol;
the inorganic acid or inorganic base catalyst is concentrated sulfuric acid or potassium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111237989.4A CN113880265B (en) | 2021-10-25 | 2021-10-25 | Phosphorus-free corrosion and scale inhibitor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111237989.4A CN113880265B (en) | 2021-10-25 | 2021-10-25 | Phosphorus-free corrosion and scale inhibitor and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113880265A CN113880265A (en) | 2022-01-04 |
| CN113880265B true CN113880265B (en) | 2023-06-20 |
Family
ID=79013511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111237989.4A Active CN113880265B (en) | 2021-10-25 | 2021-10-25 | Phosphorus-free corrosion and scale inhibitor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113880265B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4038908A1 (en) * | 1990-12-06 | 1992-06-11 | Basf Ag | USE OF WATER-SOLUBLE GRAFTED NATURALS AS WATER TREATMENT AGENTS |
| CN1435384A (en) * | 2002-01-30 | 2003-08-13 | 北京化工大学 | Corrosion-and scaling-inhibiting water treating agent |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1258963A (en) * | 1983-03-07 | 1989-09-05 | Bennett P. Boffardi | Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
| CN102476871A (en) * | 2010-11-24 | 2012-05-30 | 中国石油化工股份有限公司 | Treatment process of circulating cooling water with leaked ammonia nitrogen |
| KR101285899B1 (en) * | 2011-06-30 | 2013-07-12 | (주)켐텍스코리아 | Manufacturing method of N, P free type Eco-Friendly Chelating agents |
| US10241100B2 (en) * | 2014-03-27 | 2019-03-26 | Halliburton Energy Services, Inc. | Method for determining residual surfactant concentrations in produced water |
| CN107266313A (en) * | 2017-06-30 | 2017-10-20 | 东莞市久制电子有限公司 | A kind of sorbierite maleate compound and its preparation method and application |
-
2021
- 2021-10-25 CN CN202111237989.4A patent/CN113880265B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4038908A1 (en) * | 1990-12-06 | 1992-06-11 | Basf Ag | USE OF WATER-SOLUBLE GRAFTED NATURALS AS WATER TREATMENT AGENTS |
| CN1435384A (en) * | 2002-01-30 | 2003-08-13 | 北京化工大学 | Corrosion-and scaling-inhibiting water treating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113880265A (en) | 2022-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103449618B (en) | Non-phosphorus composite corrosion and scale inhibitor suitable for industrial circulating cooling water | |
| CN110937698A (en) | Non-phosphorus scale and corrosion inhibitor and preparation method thereof | |
| CN109293015B (en) | Industrial circulating water treatment agent | |
| US11781068B2 (en) | Corrosion inhibitor for soft water circulation heating and cooling system and preparation method of corrosion inhibitor | |
| CN112093918B (en) | Humic acid phosphorus-free corrosion and scale inhibitor and preparation method thereof | |
| CN105753183A (en) | Multiple composite corrosion inhibitor and preparation method thereof | |
| CN113912195A (en) | Non-phosphorus scale inhibitor for inhibiting silicon scale and preparation method thereof | |
| CN110818097A (en) | Phosphorus-free corrosion and scale inhibitor and preparation method thereof | |
| CN101519244A (en) | Compound scale inhibitor for treating recirculated cooling water and preparation method thereof | |
| CN107304077B (en) | Corrosion-inhibition, scale-inhibition and sterilization composition and application thereof | |
| CN113880265B (en) | Phosphorus-free corrosion and scale inhibitor and preparation method thereof | |
| CN105800802A (en) | Composite type phosphorous-free corrosion and scale inhibitor | |
| CN107304079B (en) | Corrosion-inhibition, scale-inhibition and sterilization composition and application thereof | |
| CN106277377A (en) | A kind of modified antisludging agent and preparation method thereof | |
| CN111003823A (en) | Novel efficient non-phosphorus scale and corrosion inhibitor and preparation method thereof | |
| CN111517488A (en) | Protective agent for central heating system | |
| CN107162222A (en) | A kind of water process environmental protection slow release long-acting antisludging agent | |
| CN113526687A (en) | Corrosion and scale inhibitor and preparation method thereof | |
| CN107903395B (en) | Method for preparing polyaspartic acid by catalytic hydrolysis | |
| CN108641046B (en) | Preparation of environment-friendly efficient water quality stabilizer RG-15 | |
| CN108559023B (en) | Preparation of novel environment-friendly efficient water quality stabilizer RG-9 | |
| CN115094406B (en) | Phosphorus-free prefilming agent and preparation method and application thereof | |
| CN117303607B (en) | Corrosion and scale inhibitor applied to industrial circulating water and preparation method thereof | |
| CN117466448A (en) | Green composite corrosion and scale inhibitor and preparation method thereof | |
| CN110171882A (en) | A kind of corrosion-mitigation scale-inhibition agent prescription containing biodegradable quaternary ammonium and its application |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |