CN112479397A - Scale and corrosion inhibitor suitable for low-hardness water quality and preparation method thereof - Google Patents
Scale and corrosion inhibitor suitable for low-hardness water quality and preparation method thereof Download PDFInfo
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- CN112479397A CN112479397A CN202011341624.1A CN202011341624A CN112479397A CN 112479397 A CN112479397 A CN 112479397A CN 202011341624 A CN202011341624 A CN 202011341624A CN 112479397 A CN112479397 A CN 112479397A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000005260 corrosion Methods 0.000 title claims abstract description 38
- 230000007797 corrosion Effects 0.000 title claims abstract description 38
- 239000003112 inhibitor Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims description 13
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims abstract description 22
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 11
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 11
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 11
- 150000003751 zinc Chemical class 0.000 claims abstract description 10
- LMHAGAHDHRQIMB-UHFFFAOYSA-N 1,2-dichloro-1,2,3,3,4,4-hexafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(Cl)C1(F)Cl LMHAGAHDHRQIMB-UHFFFAOYSA-N 0.000 claims abstract description 8
- -1 unsaturated sulfonic acid group compound Chemical class 0.000 claims abstract description 6
- MLGWTHRHHANFCC-UHFFFAOYSA-N prop-2-en-1-amine;hydrochloride Chemical compound Cl.NCC=C MLGWTHRHHANFCC-UHFFFAOYSA-N 0.000 claims abstract description 4
- CJFGPLRCLIHOMY-UHFFFAOYSA-N 2-hydroxyphosphanylacetic acid Chemical compound OPCC(O)=O CJFGPLRCLIHOMY-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 10
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 10
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 10
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 8
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 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 6
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 4
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 claims description 4
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 4
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 claims description 4
- 239000011592 zinc chloride Substances 0.000 claims description 4
- 235000005074 zinc chloride Nutrition 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 8
- 238000013329 compounding Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 19
- 239000000243 solution Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 13
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 235000019270 ammonium chloride Nutrition 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 208000028659 discharge Diseases 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 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 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000002351 wastewater 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/02—Acids; Metal salts or ammonium salts thereof, e.g. maleic acid or itaconic acid
-
- 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)
- 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)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a scale and corrosion inhibitor suitable for low-hardness water quality, which comprises the following raw materials in parts by weight: 8-15 parts of sodium gluconate, 5-15 parts of water-soluble zinc salt, 5-10 parts of 2-mercaptobenzothiazole, 5-15 parts of 2-hydroxyphosphinoacetic acid, 15-30 parts of multipolymer and 10-60 parts of water; the multipolymer consists of a structural unit provided by tetra allyl ammonium chloride, a structural unit provided by unsaturated carboxylic acid of C3-C10 and a structural unit provided by unsaturated sulfonic acid group compound of C2-C10. The prepared multipolymer has excellent scale and corrosion inhibition effects, the multipolymer has good synergistic effect with 2-mercaptobenzothiazole, 2-hydroxyphosphonoacetic acid, water-soluble zinc salt and sodium gluconate, and the scale and corrosion inhibitor obtained by compounding has the characteristics of excellent corrosion inhibition performance, small amount and high efficiency and is suitable for a low-hardness water quality system.
Description
Technical Field
The invention belongs to the technical field of industrial water treatment, and particularly relates to a scale and corrosion inhibitor suitable for low-hardness water quality and a preparation method thereof.
Background
Most of the medicaments used for treating domestic industrial circulating cooling water are phosphorus-based formulations, but with the development of society and the increasing perfection of environmental laws and regulations, the problems of water eutrophication, red tide and other ecological environment pollution caused by phosphorus emission as a nutrient source of microorganisms are found, so that the use of the formulations is more and more strictly limited, and people are prompted to turn attention to the development of low-phosphorus and phosphorus-free environment-friendly comprehensive medicaments. The primary discharge standard of the Integrated wastewater discharge Standard GB 8978 & 1996 for the highest allowable discharge concentration (in terms of P) of these phosphates is 0.5mg/L (for new, modified and expanded enterprises), and 1mg/L for existing enterprises, which is quite strict.
At present, the scale and corrosion inhibitor for low-hardness water in China is a high-phosphorus medicament or a large-dosage scale and corrosion inhibitor. Therefore, the preparation of the low-phosphorus, small-amount and high-efficiency scale and corrosion inhibitor for low-hardness water quality is of great significance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a scale and corrosion inhibitor suitable for low-hardness water quality 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 scale and corrosion inhibitor suitable for low-hardness water quality is prepared from the following raw materials in parts by weight: 8-15 parts of sodium gluconate, 5-15 parts of water-soluble zinc salt, 5-10 parts of 2-mercaptobenzothiazole, 5-15 parts of 2-hydroxyphosphinoacetic acid, 15-30 parts of multipolymer and 10-60 parts of water; the multipolymer consists of a structural unit provided by tetra allyl ammonium chloride, a structural unit provided by unsaturated carboxylic acid of C3-C10 and a structural unit provided by unsaturated sulfonic acid group compound of C2-C10.
As a further optimization, the unsaturated carboxylic acid is at least one of acrylic acid, methacrylic acid and itaconic acid.
Preferably, the unsaturated sulfonic compound is at least one of sodium allylsulfonate, sodium vinylsulfonate and styrene sulfonic acid.
As a further optimization, the water-soluble zinc salt is one or two of zinc chloride and zinc sulfate heptahydrate.
As a further optimization, the weight ratio of the tetraallylammonium chloride, the unsaturated carboxylic acid and the unsaturated sulfonic compound is 1 (1-4) to 0.5-3.
As a further optimization, the limiting viscosity of the multipolymer is 0.06-0.10 dL/g.
The invention also provides a preparation method of the multipolymer, which comprises the following steps:
s1: adding unsaturated carboxylic acid and water into a reaction vessel, stirring and heating to 60-90 ℃;
s2: and (3) slowly adding an ammonium persulfate solution, a sodium metabisulfite solution, tetraallylammonium chloride and an unsaturated sulfonic compound into the solution of S1 in sequence, keeping the temperature and stirring for 20-60min after each addition of one component, keeping the temperature and reacting for 1-3h after all the components are added, and cooling to room temperature to obtain the multipolymer.
In order to solve the technical problems, the invention also provides a scale and corrosion inhibitor suitable for low-hardness water quality and a preparation method thereof, wherein the preparation method comprises the following steps:
s1: stirring and mixing water, 2-hydroxyphosphonoacetic acid and water-soluble zinc salt at normal temperature;
s2: and sequentially adding sodium gluconate, 2-mercaptobenzothiazole and multipolymer into the solution of S1, and stirring and uniformly mixing to obtain the scale and corrosion inhibitor.
The invention has the beneficial effects that:
the invention takes sodium pyrosulfite as a molecular weight regulator and ammonium persulfate as an initiator, and prepares a novel multipolymer consisting of a structural unit provided by tetraallylammonium chloride, a structural unit provided by unsaturated carboxylic acid and a structural unit provided by unsaturated sulfonic acid compound through copolymerization reaction of tetraallylammonium chloride, unsaturated carboxylic acid and unsaturated sulfonic acid compound, wherein the ultimate viscosity of the multipolymer is 0.06-0.10 dL/g. The prepared multipolymer has excellent scale and corrosion inhibition effects, the multipolymer has good synergistic effect with 2-mercaptobenzothiazole, 2-hydroxyphosphonoacetic acid, water-soluble zinc salt and sodium gluconate, and the scale and corrosion inhibitor obtained by compounding has the characteristics of excellent corrosion inhibition performance, small amount and high efficiency and is suitable for a low-hardness water quality system.
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.
The multipolymer consists of a structural unit provided by tetra allyl ammonium chloride, a structural unit provided by unsaturated carboxylic acid of C3-C10 and a structural unit provided by unsaturated sulfonic acid group compound of C2-C10. The preparation steps of the multipolymer are as follows:
s1: adding unsaturated carboxylic acid and water into a reaction vessel, stirring and heating to 60-90 ℃;
s2: and (3) slowly adding an ammonium persulfate solution, a sodium metabisulfite solution, tetraallylammonium chloride and an unsaturated sulfonic compound into the solution of S1 in sequence, keeping the temperature and stirring for 20-60min after each addition of one component, keeping the temperature and reacting for 1-3h after all the components are added, and cooling to room temperature to obtain the multipolymer. The above materials are added slowly in a dropwise manner.
The weight ratio of the tetraallyl ammonium chloride, the unsaturated carboxylic acid and the unsaturated sulfonic compound is 1 (1-4) to (0.5-3), preferably 1 (2-3) to (1-2). The unsaturated carboxylic acid is at least one of acrylic acid, methacrylic acid and itaconic acid, the unsaturated sulfonic compound is at least one of sodium allylsulfonate, sodium vinylsulfonate and styrene sulfonic acid, and the water-soluble zinc salt is one or two of zinc chloride and zinc sulfate heptahydrate. The limiting viscosity of the prepared multipolymer is 0.06-0.10 dL/g.
Preparation of the multipolymer (A): the weight ratio of charging of the tetra-allyl ammonium chloride, the unsaturated carboxylic acid and the unsaturated sulfonic compound is 1:2.5:1.5, the charging amount of the tetra-allyl ammonium chloride is 20g, the unsaturated carboxylic acid is methacrylic acid, and the unsaturated sulfonic compound is styrene sulfonic acid.
S1: unsaturated carboxylic acid and water (25g) are added into a reaction vessel, stirred and heated to 80 ℃;
s2: and (2) slowly adding an ammonium persulfate solution (1.2g of ammonium persulfate is dissolved in 50g of water), a sodium metabisulfite solution (1.2g of sodium metabisulfite is dissolved in 35g of water), tetraallyl ammonium chloride and an unsaturated sulfonic compound into the solution of S1 in sequence, keeping the temperature and stirring for 30min after adding one component, keeping the temperature and reacting for 2h after adding all the components, and cooling to room temperature to obtain the multipolymer A (the limiting viscosity at 30 ℃ is 0.076 dL/g).
Preparation of the multipolymer (B): the weight ratio of charging materials of the tetraallyl ammonium chloride, the unsaturated carboxylic acid and the unsaturated sulfonic compound is 1:2:1, the charging amount of the tetraallyl ammonium chloride is 20g, the unsaturated carboxylic acid is acrylic acid, and the unsaturated sulfonic compound is sodium vinylsulfonate.
S1: unsaturated carboxylic acid and water (20g) are added into a reaction vessel, stirred and heated to 70 ℃;
s2: and (2) slowly adding an ammonium persulfate solution (1.4g of ammonium persulfate is dissolved in 60g of water), a sodium metabisulfite solution (1.2g of sodium metabisulfite is dissolved in 35g of water), tetraallylammonium chloride and an unsaturated sulfonic compound into the solution of S1 in sequence, keeping the temperature and stirring for 40min after adding one component, keeping the temperature and reacting for 1h after adding all the components, and cooling to room temperature to obtain the multipolymer B (the limiting viscosity at 30 ℃ is 0.081 dL/g).
Preparation of the multipolymer (C): the weight ratio of charging materials of the tetra-allyl ammonium chloride, the unsaturated carboxylic acid and the unsaturated sulfonic compound is 1:3:2, the charging amount of the tetra-allyl ammonium chloride is 20g, the unsaturated carboxylic acid is itaconic acid, and the unsaturated sulfonic compound is sodium allylsulfonate.
S1: unsaturated carboxylic acid and water (20g) are added into a reaction vessel, stirred and heated to 90 ℃;
s2: and (2) slowly adding an ammonium persulfate solution (1.2g of ammonium persulfate is dissolved in 60g of water), a sodium metabisulfite solution (1.3g of sodium metabisulfite is dissolved in 40g of water), tetraallyl ammonium chloride and an unsaturated sulfonic compound into the solution of S1 in sequence, keeping the temperature and stirring for 20min after adding one component, keeping the temperature and reacting for 3h after adding all the components, and cooling to room temperature to obtain the multipolymer C (the limiting viscosity at 30 ℃ is 0.082 dL/g).
Example 1
At normal temperature, 35g of water, 10g of 2-hydroxyphosphonoacetic acid and 15g of zinc sulfate heptahydrate are stirred and mixed; then, 12g of sodium gluconate, 8g of 2-mercaptobenzothiazole and 20g of multipolymer A are sequentially added into the mixed solution and stirred and mixed evenly to obtain the scale and corrosion inhibitor.
Example 2
Stirring and mixing 45g of water, 5g of 2-hydroxyphosphonoacetic acid and 5g of zinc chloride at normal temperature; then, 15g of sodium gluconate, 5g of 2-mercaptobenzothiazole and 30g of multipolymer B are sequentially added into the mixed solution and stirred and mixed evenly to obtain the scale and corrosion inhibitor.
Example 3
Stirring and mixing 50g of water, 15g of 2-hydroxyphosphonoacetic acid and 12g of zinc sulfate heptahydrate at normal temperature; then 8g of sodium gluconate, 10g of 2-mercaptobenzothiazole and 10g of multipolymer C are sequentially added into the mixed solution and stirred and mixed evenly to obtain the scale and corrosion inhibitor.
Comparative example 1 a scale and corrosion inhibitor was prepared in the same manner as in example 1 except that the multipolymer a was not added.
Comparative example 2 the scale and corrosion inhibitor was prepared in the same manner as in example 1, except that sodium gluconate was not added.
Comparative example 3 a scale and corrosion inhibitor was prepared in the same manner as in example 1, except that 2-mercaptobenzothiazole was not added.
Comparative example 4 the scale and corrosion inhibitor was prepared in the same manner as in example 1, except that zinc sulfate heptahydrate was not added.
Comparative example 5 a scale and corrosion inhibitor was prepared in the same manner as in example 1, except that 20g of the multipolymer a was replaced with 20g of an acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/hydroxypropyl acrylate terpolymer.
Comparative example 6 the scale and corrosion inhibitor was prepared in the same manner as in example 1 except that 20g of the multipolymer A was replaced with 20g of acrylic acid/2-acrylamide-2-methylpropanesulfonic acid/2-acrylamide-2-methylpropylphosphonic acid terpolymer.
It is noted that the water used in the present invention is deionized water and the total phosphorus content of 2-hydroxyphosphonoacetic acid is 42.4% (as PO 4)3-Meter).
A scale and corrosion inhibition performance comparison experiment is carried out on the product of the embodiment of the invention and the comparative example, a water sample is taken from a chemical industry enterprise, the main indexes of the water quality of the experiment are 97.51mg/L (calculated by calcium carbonate), 63.79mg/L (calculated by calcium carbonate) and 51.29mg/L (calculated by calcium carbonate), the corrosion inhibition performance test method is carried out according to the regulation of GB/T18175-.
Table 1 experimental result data of scale and corrosion inhibition performance
| Item | Scale inhibition Rate (%) | Sustained release rate (mm/a) |
| Example 1 | 98.02 | 0.0155 |
| Example 2 | 97.73 | 0.0166 |
| Example 3 | 97.49 | 0.0183 |
| Comparative example 1 | 61.37 | 0.0753 |
| Comparative example 2 | 72.94 | 0.0548 |
| Comparative example 3 | 79.47 | 0.0509 |
| Comparative example 4 | 74.90 | 0.0520 |
| Comparative example 5 | 85.93 | 0.0304 |
| Comparative example 6 | 89.57 | 0.0293 |
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.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
Claims (8)
1. The scale and corrosion inhibitor suitable for low-hardness water quality is characterized by comprising the following raw materials in parts by weight: 8-15 parts of sodium gluconate, 5-15 parts of water-soluble zinc salt, 5-10 parts of 2-mercaptobenzothiazole, 5-15 parts of 2-hydroxyphosphinoacetic acid, 15-30 parts of multipolymer and 10-60 parts of water;
the multipolymer consists of a structural unit provided by tetra allyl ammonium chloride, a structural unit provided by unsaturated carboxylic acid of C3-C10 and a structural unit provided by unsaturated sulfonic acid group compound of C2-C10.
2. The scale and corrosion inhibitor for low hardness water according to claim 1, wherein the unsaturated carboxylic acid is at least one of acrylic acid, methacrylic acid and itaconic acid.
3. The scale and corrosion inhibitor for low hardness water according to claim 1, wherein the unsaturated sulfonic compound is at least one of sodium allylsulfonate, sodium vinylsulfonate and styrene sulfonic acid.
4. The scale and corrosion inhibitor for low hardness water according to claim 1, wherein the water soluble zinc salt is one or two of zinc chloride and zinc sulfate heptahydrate.
5. The scale and corrosion inhibitor for low-hardness water quality as claimed in claim 1, wherein the weight ratio of the tetraallylammonium chloride, the unsaturated carboxylic acid and the unsaturated sulfonic compound is 1 (1-4) to 0.5-3.
6. The scale and corrosion inhibitor for low hardness water according to claim 1, wherein the limiting viscosity of the multipolymer is 0.06-0.10 dL/g.
7. The scale and corrosion inhibitor according to any one of claims 1 to 6, wherein the preparation method of the multipolymer comprises the following steps:
s1: adding unsaturated carboxylic acid and water into a reaction vessel, stirring and heating to 60-90 ℃;
s2: and (3) slowly adding an ammonium persulfate solution, a sodium metabisulfite solution, tetraallylammonium chloride and an unsaturated sulfonic compound into the solution of S1 in sequence, keeping the temperature and stirring for 20-60min after each addition of one component, keeping the temperature and reacting for 1-3h after all the components are added, and cooling to room temperature to obtain the multipolymer.
8. The method for preparing the scale and corrosion inhibitor according to any one of claims 1 to 7, which is characterized by comprising the following steps:
s1: stirring and mixing water, 2-hydroxyphosphonoacetic acid and water-soluble zinc salt at normal temperature;
s2: and sequentially adding sodium gluconate, 2-mercaptobenzothiazole and multipolymer into the solution of S1, and stirring and uniformly mixing to obtain the scale and corrosion inhibitor.
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| US4640793A (en) * | 1984-02-14 | 1987-02-03 | Calgon Corporation | Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
| CN102452724A (en) * | 2010-10-20 | 2012-05-16 | 中国石油化工股份有限公司 | Composite corrosion and scale inhibitor and its application in water treatment |
| CN106478872A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of copolymer and preparation method and application |
| CN107522303A (en) * | 2016-06-20 | 2017-12-29 | 中国石油化工股份有限公司 | Non-Phosphorus composite anti incrustation eorrosion snhibiter and its application and the processing method of recirculated cooling water |
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2020
- 2020-11-26 CN CN202011341624.1A patent/CN112479397A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4640793A (en) * | 1984-02-14 | 1987-02-03 | Calgon Corporation | Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
| CN102452724A (en) * | 2010-10-20 | 2012-05-16 | 中国石油化工股份有限公司 | Composite corrosion and scale inhibitor and its application in water treatment |
| CN106478872A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of copolymer and preparation method and application |
| CN107522303A (en) * | 2016-06-20 | 2017-12-29 | 中国石油化工股份有限公司 | Non-Phosphorus composite anti incrustation eorrosion snhibiter and its application and the processing method of recirculated cooling water |
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