CN112499777A - High-efficiency low-phosphorus scale and corrosion inhibitor and preparation method thereof - Google Patents
High-efficiency low-phosphorus scale and corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN112499777A CN112499777A CN202011340856.5A CN202011340856A CN112499777A CN 112499777 A CN112499777 A CN 112499777A CN 202011340856 A CN202011340856 A CN 202011340856A CN 112499777 A CN112499777 A CN 112499777A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 56
- 230000007797 corrosion Effects 0.000 title claims abstract description 56
- 239000003112 inhibitor Substances 0.000 title claims abstract description 45
- 239000011574 phosphorus Substances 0.000 title claims abstract description 40
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 34
- 229920001577 copolymer Polymers 0.000 claims abstract description 23
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 17
- 239000008367 deionised water Substances 0.000 claims abstract description 15
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 15
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims abstract description 10
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 150000003751 zinc Chemical class 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 48
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 229910021538 borax Inorganic materials 0.000 claims description 10
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims description 10
- 239000004328 sodium tetraborate Substances 0.000 claims description 10
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 10
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 10
- SZHQPBJEOCHCKM-UHFFFAOYSA-N 2-phosphonobutane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(P(O)(O)=O)(C(O)=O)CC(O)=O SZHQPBJEOCHCKM-UHFFFAOYSA-N 0.000 claims description 9
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 claims description 9
- CJFGPLRCLIHOMY-UHFFFAOYSA-N 2-hydroxyphosphanylacetic acid Chemical compound OPCC(O)=O CJFGPLRCLIHOMY-UHFFFAOYSA-N 0.000 claims description 5
- 239000011592 zinc chloride Substances 0.000 claims description 5
- 235000005074 zinc chloride Nutrition 0.000 claims description 5
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 3
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 3
- FZQSLXQPHPOTHG-UHFFFAOYSA-N [K+].[K+].O1B([O-])OB2OB([O-])OB1O2 Chemical compound [K+].[K+].O1B([O-])OB2OB([O-])OB1O2 FZQSLXQPHPOTHG-UHFFFAOYSA-N 0.000 claims description 3
- RDMZIKMKSGCBKK-UHFFFAOYSA-N disodium;(9,11-dioxido-5-oxoboranyloxy-2,4,6,8,10,12,13-heptaoxa-1,3,5,7,9,11-hexaborabicyclo[5.5.1]tridecan-3-yl)oxy-oxoborane;tetrahydrate Chemical compound O.O.O.O.[Na+].[Na+].O1B(OB=O)OB(OB=O)OB2OB([O-])OB([O-])OB1O2 RDMZIKMKSGCBKK-UHFFFAOYSA-N 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 108010064470 polyaspartate Proteins 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims 4
- 239000000498 cooling water Substances 0.000 abstract description 12
- 230000005764 inhibitory process Effects 0.000 abstract description 12
- 150000001732 carboxylic acid derivatives Chemical class 0.000 abstract description 6
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 3
- 239000010962 carbon steel Substances 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 239000008234 soft water Substances 0.000 description 8
- 238000005457 optimization Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- CLZJMLYRPZBOPU-UHFFFAOYSA-N disodium;boric acid;hydrogen borate Chemical compound [Na+].[Na+].OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB([O-])[O-] CLZJMLYRPZBOPU-UHFFFAOYSA-N 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C02F5/14—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 phosphorus
- C02F5/145—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 phosphorus 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a high-efficiency low-phosphorus scale and corrosion inhibitor and a preparation method thereof, wherein the high-efficiency low-phosphorus scale and corrosion inhibitor comprises the following raw materials in parts by weight: 5-15 parts of organic phosphine, 10-20 parts of sulfonate copolymer, 10-15 parts of carboxylic acid polymer, 10-20 parts of borate, 5-15 parts of sodium nitrite, 5-15 parts of zinc salt and 10-50 parts of deionized water. The high-efficiency low-phosphorus scale and corrosion inhibitor has the characteristics of small amount and high efficiency; the high-efficiency low-phosphorus scale and corrosion inhibitor is suitable for a circulating cooling water system with low hardness and low alkalinity, and has excellent corrosion inhibition performance on carbon steel and stainless steel equipment.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a high-efficiency low-phosphorus scale and corrosion inhibitor and a preparation method thereof.
Background
China is one of the countries with the most shortage of water resources in the world, the total amount of annual water resources is 2.8 billion tons, the people living in the sixth place in the world have the average water volume less than 2400m31/4, the world rank 110, which is the world's average water volume, is listed as one of 13 water-poor countries by the united nations. At present, the water waste coverage is almost all over the country. In northern areas where water is scarce, water scarcity has been the most serious problem in the development of agriculture and industry. The proportion of the circulating cooling water for cooling in the industrial water is large and accounts for 60-80% of the total water consumption, so that the method has important significance in saving the consumption of the circulating cooling water, improving the concentration ratio of the circulating cooling water, improving the reuse ratio of the water and saving water resources.
The industrial circulating cooling system mostly adopts underground water, yellow river water, tap water and the like as make-up water of circulating cooling water, and because the contents of calcium ions, magnesium ions and the like in the circulating cooling water are high, the scaling risk of circulating cooling system equipment is greatly increased, and the concentration ratio of the circulating cooling water is limited.
At present, soft water is adopted as circulating cooling water for supplementing water for production needs or other reasons in a few domestic enterprises. The soft water has low content of calcium ions and magnesium ions and low scaling risk, can greatly improve the concentration ratio of the circulating cooling water, and saves water resources. With the increasing shortage of water resources and the rapid development of industry, soft water is gradually applied to the field of industrial circulating cooling water. The use of soft water as the recirculated cooling water make-up water reduces the risk of fouling of the recirculated cooling equipment, but severely increases the corrosion tendency of the equipment. The scale and corrosion inhibitor for soft water in China is a high-phosphorus medicament, so that water eutrophication is easy to cause and the environment is polluted; or the dosage is larger, the cost is higher, and the slow release performance is poorer. This is also the reason why soft water is limited to industrial hydronic systems. Therefore, the research and development of the scale and corrosion inhibitor applied to the water treatment of soft water have great significance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a high-efficiency low-phosphorus scale and corrosion inhibitor and a preparation method thereof, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high-efficiency low-phosphorus scale and corrosion inhibitor comprises the following raw materials in parts by weight: 5-15 parts of organic phosphine, 10-20 parts of sulfonate copolymer, 10-15 parts of carboxylic acid polymer, 10-20 parts of borate, 5-15 parts of sodium nitrite, 5-15 parts of water-soluble zinc salt and 10-50 parts of deionized water.
As further optimization, the high-efficiency low-phosphorus scale and corrosion inhibitor comprises the following raw materials in parts by weight: 8-12 parts of organic phosphine, 13-18 parts of sulfonate copolymer, 12-15 parts of carboxylic acid polymer, 12-18 parts of borate, 8-12 parts of sodium nitrite, 8-12 parts of water-soluble zinc salt and 30-40 parts of deionized water.
Preferably, the borate is one or more of borax, disodium octaborate tetrahydrate and potassium tetraborate.
As a further optimization, the organic phosphine is one or more of hydroxyethylidene diphosphonic acid, 2-phosphono-1, 2, 4-butane tricarboxylic acid and 2-hydroxyphosphino acetic acid.
As a further optimization, the sulfonate copolymer is one or more of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer, acrylic acid/sodium propylene sulfonate copolymer and acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/hydroxypropyl acrylate terpolymer.
As a further optimization, the carboxylic acid polymer is one or two of polyepoxysuccinic acid and polyaspartic acid.
As a further optimization, the water-soluble zinc salt is one or two of zinc chloride and zinc sulfate heptahydrate.
In order to solve the technical problems, the invention also provides a preparation method of the high-efficiency low-phosphorus scale and corrosion inhibitor, which comprises the following steps:
s1: weighing the raw materials according to the weight parts of the high-efficiency low-phosphorus scale and corrosion inhibitor;
s2: sequentially adding the weighed sodium nitrite and deionized water into a stirred reaction container, and stirring for dissolving;
s3: adding the weighed borate into the solution of S2, and stirring for dissolving;
s4: adding the weighed zinc salt into the solution of S3, and stirring for dissolving;
s5: and (3) sequentially adding the weighed organic phosphine, carboxylic acid polymer and sulfonate copolymer into the solution of S4, and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
As further optimization, the preparation method of the high-efficiency low-phosphorus scale and corrosion inhibitor comprises the following steps:
adding 10 parts by weight of sodium nitrite and 30 parts by weight of deionized water into a stirring kettle, and stirring for dissolving; adding 15 parts by weight of borax into the solution, stirring and dissolving, then adding 10 parts by weight of zinc sulfate heptahydrate, and stirring and dissolving; finally, adding 12 parts by weight of 2-phosphono-1, 2, 4-butane tricarboxylic acid, 12 parts by weight of polyepoxysuccinic acid and 15 parts by weight of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer into a reaction kettle in sequence; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
The high-efficiency low-phosphorus scale and corrosion inhibitor disclosed by the invention has the following functions: the organic phosphine has the effects of inhibiting scale and corrosion, complexing and increasing capacity, preventing the formation of calcium carbonate scale, forming a layer of protective film on the surface of the carbon steel, separating metal from water, inhibiting the corrosion of the metal, and having good synergistic effect with zinc salt; the sulfonate copolymer has the functions of scale inhibition and dispersion and zinc ion stabilization, and suspended particles are prevented from being deposited on the surface of metal; the carboxylic acid polymer has the functions of scale inhibition and dispersion and certain slow release; the borax mainly plays a role in corrosion inhibition, and is adsorbed on an oxide film on the surface of the metal, so that the oxide film is stable and firm, and the anodic reaction process of the metal electrode can be retarded; sodium nitrite is used in the present invention as a borate synergist.
The invention has the beneficial effects that:
1. the borate in the corrosion inhibitor has high-efficiency synergistic corrosion inhibition effect, and the corrosion inhibition performance of the corrosion inhibitor is improved;
2. the high-efficiency low-phosphorus scale and corrosion inhibitor has the characteristics of small amount and high efficiency;
3. the high-efficiency low-phosphorus scale and corrosion inhibitor is suitable for a circulating cooling water system (namely a soft water system) with low hardness and low alkalinity, and has excellent corrosion inhibition performance on carbon steel and stainless steel equipment.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples.
Example 1
Adding 10kg of sodium nitrite and 30kg of deionized water into a stirring kettle, and stirring for dissolving; adding 15kg of borax into the solution, stirring and dissolving, then adding 10kg of zinc sulfate heptahydrate, and stirring and dissolving; finally, 12kg of 2-phosphono-1, 2, 4-butanetricarboxylic acid, 12kg of polyepoxysuccinic acid and 15kg of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer are sequentially added into the reaction kettle; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
Example 2
Adding 5kg of sodium nitrite and 20kg of deionized water into a stirring kettle, and stirring for dissolving; adding 10kg of disodium octaborate tetrahydrate into the solution, stirring to dissolve the disodium octaborate, adding 15kg of zinc chloride into the solution, and stirring to dissolve the zinc chloride; finally, 5kg of hydroxyethylidene diphosphonic acid, 10kg of polyepoxysuccinic acid and 10kg of acrylic acid/sodium propylene sulfonate copolymer are sequentially added into a reaction kettle; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
Example 3
Adding 15kg of sodium nitrite and 50kg of deionized water into a stirring kettle, and stirring for dissolving; adding 20kg of potassium tetraborate into the solution, stirring and dissolving, then adding 5kg of zinc chloride, and stirring and dissolving; finally, 10kg of 2-hydroxyphosphinoacetic acid, 15kg of polyaspartic acid and 20kg of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/hydroxypropyl acrylate terpolymer are sequentially added into a reaction kettle; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
Example 4
Adding 12kg of sodium nitrite and 40kg of deionized water into a stirring kettle, and stirring for dissolving; adding 18kg of borax into the solution, stirring and dissolving, then adding 12kg of zinc sulfate heptahydrate, and stirring and dissolving; finally, 7kg of 2-phosphono-1, 2, 4-butanetricarboxylic acid, 8kg of 2-hydroxyphosphinoacetic acid, 12kg of polyepoxysuccinic acid, 10kg of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer and 8kg of acrylic acid/sodium propylene sulfonate copolymer are sequentially added into the reaction kettle; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
Example 5
Adding 10kg of sodium nitrite and 30kg of deionized water into a stirring kettle, and stirring for dissolving; adding 10kg of borax into the solution, stirring and dissolving, then adding 10kg of zinc sulfate heptahydrate, and stirring and dissolving; finally, 12kg of 2-phosphono-1, 2, 4-butanetricarboxylic acid, 12kg of polyepoxysuccinic acid and 15kg of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer are sequentially added into the reaction kettle; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
Example 6
Adding 5kg of sodium nitrite and 30kg of deionized water into a stirring kettle, and stirring for dissolving; adding 15kg of borax into the solution, stirring and dissolving, then adding 10kg of zinc sulfate heptahydrate, and stirring and dissolving; finally, 12kg of 2-phosphono-1, 2, 4-butanetricarboxylic acid, 12kg of polyepoxysuccinic acid and 15kg of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer are sequentially added into the reaction kettle; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
Comparative example 1
The preparation method of the scale and corrosion inhibitor is the same as that of the example 1, except that borax is not added.
Comparative example 2
The preparation method of the scale and corrosion inhibitor is the same as that of the example 1, except that sodium nitrite is not added.
Comparative example 3
The preparation method of the scale and corrosion inhibitor is the same as that of the example 1, except that polyepoxysuccinic acid is not added.
Comparative example 4
The preparation method of the scale and corrosion inhibitor is the same as that of example 1, except that the acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer is not added.
Comparative example 5
The preparation method of the scale and corrosion inhibitor is the same as that of the example 1, except that zinc sulfate heptahydrate is not added.
Comparative example 6
Patent (CN 104355419A) the product of example 1.
The 2-phosphono-1, 2, 4-butanetricarboxylic acid used in the above examples and comparative examples had a total phosphorus content of 17% (as PO)4 3-Calculated as PO), the total phosphorus content of hydroxyethylidene diphosphonic acid is 45 percent (calculated as PO)4 3-Calculated as PO), the total phosphorus content in 2-hydroxyphosphinoacetic acid is 42% (calculated as PO)4 3-Meter).
A scale and corrosion inhibition performance comparison experiment is carried out on the products of examples 1-6 and comparative examples 1-6, a water sample is taken from a chemical enterprise, the main indexes of the water quality of the experiment are 96.37mg/L (calculated by calcium carbonate), 62.59mg/L (calculated by calcium carbonate) and 43.62mg/L (calculated by calcium carbonate), the corrosion inhibition performance test method is carried out according to the regulation of GB/T18175-.
TABLE 1 Corrosion inhibition performance test result data at different dosing concentrations
TABLE 2 Scale inhibition Performance test result data (drug concentration 20mg/L)
| Item | Scale inhibition Rate (%) |
| Example 1 | 98.93 |
| Example 2 | 98.87 |
| Example 3 | 98.81 |
| Example 4 | 98.78 |
| Example 5 | 98.27 |
| Example 6 | 98.56 |
| Comparative example 1 | 93.40 |
| Comparative example 2 | 96.14 |
| Comparative example 3 | 96.21 |
| Comparative example 4 | 95.16 |
| Comparative example 5 | 95.28 |
| Comparative example 6 | 95.24 |
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention; those skilled in the art can make various changes, modifications and alterations without departing from the scope of the invention, and all equivalent changes, modifications and alterations to the disclosed technology are equivalent embodiments of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (9)
1. The high-efficiency low-phosphorus scale and corrosion inhibitor is characterized by comprising the following raw materials in parts by weight: 5-15 parts of organic phosphine, 10-20 parts of sulfonate copolymer, 10-15 parts of carboxylic acid polymer, 10-20 parts of borate, 5-15 parts of sodium nitrite, 5-15 parts of water-soluble zinc salt and 10-50 parts of deionized water.
2. The high-efficiency low-phosphorus scale and corrosion inhibitor according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 8-12 parts of organic phosphine, 13-18 parts of sulfonate copolymer, 12-15 parts of carboxylic acid polymer, 12-18 parts of borate, 8-12 parts of sodium nitrite, 8-12 parts of water-soluble zinc salt and 30-40 parts of deionized water.
3. The high-efficiency low-phosphorus scale and corrosion inhibitor according to claim 1 or 2, wherein the borate is one or more of borax, disodium octaborate tetrahydrate and potassium tetraborate.
4. The high efficiency low phosphorus scale and corrosion inhibitor according to claim 1 or 2, wherein the organic phosphine is one or more of hydroxyethylidene diphosphonic acid, 2-phosphono-1, 2, 4-butane tricarboxylic acid, 2-hydroxyphosphino acetic acid.
5. The high-efficiency low-phosphorus scale and corrosion inhibitor according to claim 1 or 2, wherein the sulfonate copolymer is one or more of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer, acrylic acid/sodium propylene sulfonate copolymer, and acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/hydroxypropyl acrylate terpolymer.
6. The high-efficiency low-phosphorus scale and corrosion inhibitor according to claim 1 or 2, wherein the carboxylic acid polymer is one or two of polyepoxysuccinic acid and polyaspartic acid.
7. The high-efficiency low-phosphorus scale and corrosion inhibitor according to claim 1 or 2, wherein the water-soluble zinc salt is one or two of zinc chloride and zinc sulfate heptahydrate.
8. The preparation method of the high-efficiency low-phosphorus scale and corrosion inhibitor according to any one of claims 1 to 7, which is characterized by comprising the following steps:
s1: weighing the raw materials according to the weight parts of the high-efficiency low-phosphorus scale and corrosion inhibitor;
s2: sequentially adding the weighed sodium nitrite and deionized water into a stirred reaction container, and stirring for dissolving;
s3: adding the weighed borate into the solution of S2, and stirring for dissolving;
s4: adding the weighed zinc salt into the solution of S3, and stirring for dissolving;
s5: and (3) sequentially adding the weighed organic phosphine, carboxylic acid polymer and sulfonate copolymer into the solution of S4, and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
9. The preparation method of the high-efficiency low-phosphorus scale and corrosion inhibitor according to claim 8, which is characterized by comprising the following steps:
adding 10 parts by weight of sodium nitrite and 30 parts by weight of deionized water into a stirring kettle, and stirring for dissolving; adding 15 parts by weight of borax into the solution, stirring and dissolving, then adding 10 parts by weight of zinc sulfate heptahydrate, and stirring and dissolving; finally, adding 12 parts by weight of 2-phosphono-1, 2, 4-butane tricarboxylic acid, 12 parts by weight of polyepoxysuccinic acid and 15 parts by weight of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid copolymer into a reaction kettle in sequence; and uniformly stirring at room temperature for 20-30 min to obtain the high-efficiency low-phosphorus scale and corrosion inhibitor.
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| CN114768542A (en) * | 2022-03-04 | 2022-07-22 | 山东天庆科技发展有限公司 | High-silicon water reverse osmosis scale inhibitor and preparation method thereof |
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