CN113955868A - Multifunctional scale and corrosion inhibitor and preparation method thereof - Google Patents
Multifunctional scale and corrosion inhibitor and preparation method thereof Download PDFInfo
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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 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002253 acid Substances 0.000 claims abstract description 29
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 26
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 26
- 239000010452 phosphate Substances 0.000 claims abstract description 26
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims abstract description 26
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 21
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims abstract description 3
- DXYYSGDWQCSKKO-UHFFFAOYSA-N 2-methylbenzothiazole Chemical compound C1=CC=C2SC(C)=NC2=C1 DXYYSGDWQCSKKO-UHFFFAOYSA-N 0.000 claims description 12
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 12
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 8
- 229940120146 EDTMP Drugs 0.000 claims description 8
- 229920002125 Sokalan® Polymers 0.000 claims description 8
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 8
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 8
- 239000004584 polyacrylic acid Substances 0.000 claims description 8
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 8
- 239000012964 benzotriazole Substances 0.000 claims description 6
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 6
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 5
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- -1 alkyl sulfonic acid Chemical compound 0.000 claims description 3
- JJMCCZLIAMHGME-UHFFFAOYSA-N n-(2-imidazol-1-yl-2-phenylethyl)-1h-imidazole-5-carboxamide Chemical compound C=1N=CNC=1C(=O)NCC(N1C=NC=C1)C1=CC=CC=C1 JJMCCZLIAMHGME-UHFFFAOYSA-N 0.000 claims description 3
- BYELUCYOXPYOJA-UHFFFAOYSA-N n-[1-(2,4-dichlorophenyl)-2-imidazol-1-ylethyl]-5-phenyl-1,3,4-oxadiazole-2-carboxamide Chemical compound ClC1=CC(Cl)=CC=C1C(NC(=O)C=1OC(=NN=1)C=1C=CC=CC=1)CN1C=NC=C1 BYELUCYOXPYOJA-UHFFFAOYSA-N 0.000 claims description 3
- FBPVJWUZNQQNEU-UHFFFAOYSA-N n-[2,2-bis(4-chlorophenyl)-2-imidazol-1-ylethyl]benzamide Chemical compound C1=CC(Cl)=CC=C1C(N1C=NC=C1)(C=1C=CC(Cl)=CC=1)CNC(=O)C1=CC=CC=C1 FBPVJWUZNQQNEU-UHFFFAOYSA-N 0.000 claims description 3
- OQOGEOLRYAOSKO-UHFFFAOYSA-N 1,1-dichloro-1-nitroethane Chemical compound CC(Cl)(Cl)[N+]([O-])=O OQOGEOLRYAOSKO-UHFFFAOYSA-N 0.000 claims 1
- XQRLCLUYWUNEEH-UHFFFAOYSA-N diphosphonic acid Chemical compound OP(=O)OP(O)=O XQRLCLUYWUNEEH-UHFFFAOYSA-N 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003814 drug Substances 0.000 abstract description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 17
- 239000003795 chemical substances by application Substances 0.000 description 10
- 150000003863 ammonium salts Chemical class 0.000 description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 description 8
- 230000005764 inhibitory process Effects 0.000 description 6
- 229910052918 calcium silicate Inorganic materials 0.000 description 5
- 239000000378 calcium silicate Substances 0.000 description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 5
- XQFYNYHVDSRKPH-UHFFFAOYSA-N azane;hydrofluoride Chemical group N.N.F XQFYNYHVDSRKPH-UHFFFAOYSA-N 0.000 description 4
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 4
- 238000007922 dissolution test Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- XOHQAXXZXMHLPT-UHFFFAOYSA-N ethyl(phosphonooxy)phosphinic acid Chemical compound CCP(O)(=O)OP(O)(O)=O XOHQAXXZXMHLPT-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid group Chemical group S(N)(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- UMMXZMYUOYJAGZ-UHFFFAOYSA-N (1-hydroxy-2-phosphonooxyethyl) dihydrogen phosphate Chemical compound OP(=O)(O)OC(O)COP(O)(O)=O UMMXZMYUOYJAGZ-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 description 2
- HLZVNOYQJJUJDR-UHFFFAOYSA-N ethyl hydroxy phosphono phosphate Chemical compound CCOP(=O)(OO)OP(=O)(O)O HLZVNOYQJJUJDR-UHFFFAOYSA-N 0.000 description 2
- 239000008233 hard water Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- GOLXRNDWAUTYKT-UHFFFAOYSA-N 3-(1H-indol-3-yl)propanoic acid Chemical compound C1=CC=C2C(CCC(=O)O)=CNC2=C1 GOLXRNDWAUTYKT-UHFFFAOYSA-N 0.000 description 1
- CIFIVCCKVZFJFT-UHFFFAOYSA-N 4-(4-chlorophenyl)-n-(2-imidazol-1-yl-1-phenylethyl)benzamide Chemical compound C1=CC(Cl)=CC=C1C1=CC=C(C(=O)NC(CN2C=NC=C2)C=2C=CC=CC=2)C=C1 CIFIVCCKVZFJFT-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000668 effect on calcium Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- BYELUCYOXPYOJA-UHFFFAOYSA-O n-[1-(2,4-dichlorophenyl)-2-(1h-imidazol-1-ium-1-yl)ethyl]-5-phenyl-1,3,4-oxadiazole-2-carboxamide Chemical compound ClC1=CC(Cl)=CC=C1C(NC(=O)C=1OC(=NN=1)C=1C=CC=CC=1)C[NH+]1C=NC=C1 BYELUCYOXPYOJA-UHFFFAOYSA-O 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000002352 surface water 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
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
A multifunctional scale and corrosion inhibitor and a preparation method thereof. The invention discloses a multifunctional scale and corrosion inhibitor which comprises the following components in percentage by mass: 1-15% of phosphate, 5-10% of sulfonate, 10-25% of phosphonate, 10-20% of polycarboxylic acid, 1-10% of azole, 0.5-1% of ammonia salt and the balance of water; a preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps: the method comprises the following steps: adding water into a container, adding phosphate and sulfonate solids, stirring and dissolving to obtain a dissolved solution; step two: adding phosphonate and polycarboxylic acid liquid into the dissolved solution, and stirring and mixing uniformly; step three: finally, adding azole, adding ammonia salt and stirring to obtain a finished product, thereby preparing the corrosion inhibitor; after the medicament components of ammonium bifluoride or diammonium bifluoride are added into the corrosion inhibitor, the application effect is improved and changed.
Description
Technical Field
The invention relates to a multifunctional scale and corrosion inhibitor and a preparation method thereof, belonging to the field of corrosion inhibitors.
Background
At present, people need to carry out scale removal treatment on an industrial circulating cooling water system, a heat supply network system and boiler water under the condition of shutdown and production halt, acid cleaning is needed for removing scale of the industrial circulating cooling water system, the heat supply network system and the boiler water, normal production is influenced, corrosion of equipment is caused, alkaline is added for softening scale, certain corrosivity is achieved, and a drill rod shovel needs to be manually hammered to remove the scale, so that time and labor are wasted. In addition, in the existing water treatment agent, different treatment agents are used for removing scales of different systems, and the function is single, for example, the water treatment agent has a scale inhibition function, does not have a scale removal function, has a scale inhibition function, cannot be used in a heat supply network or a low-pressure boiler in industrial circulating cooling water, cannot be used for underground water in surface water, cannot be used for negative hard water in high-alkali and high-hard water, cannot be used for high concentration rate in low concentration rate and the like, so that the existing water treatment agent has various formulas and causes inconvenience in the use process.
The invention patent '200910073943.6' discloses a multifunctional scale and corrosion inhibitor and a preparation method thereof, which are used for industrial circulating cooling water, a heat supply network system and a water treatment agent of a low-pressure boiler. The product is prepared from phosphate, sulfonate, phosphonate, polycarboxylic acid, azole and water according to mass percentage. The preparation method comprises the steps of sequentially adding the components into a reaction container under the condition of normal temperature, stirring, dissolving and mixing to obtain the finished product. It meets the national standards of DL/T806-2002 (electric power) and SH260407-2003 (petrochemical) circulating cooling water scale and corrosion inhibitors. The scale inhibitor can be used for various water treatment systems to serve as water treatment agents of various water qualities, can be directly added into the water treatment systems to have the functions of scale inhibition, scale removal, corrosion inhibition and concentration rate improvement, and realizes the ideal effects of scale removal, scale prevention without scale and water saving, but the patents have the following problems: the effect of removing silicate scale is general.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a multifunctional scale and corrosion inhibitor and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multifunctional scale and corrosion inhibitor comprises the following components in percentage by mass:
1-15% of phosphate, 5-10% of sulfonate, 10-25% of phosphonate, 10-20% of polycarboxylic acid, 1-10% of azole, 1-5% of ammonia salt and the balance of water.
Further, the corrosion inhibitor comprises the following components in percentage by mass:
1% of phosphate, 5% of sulfonate, 10% of phosphonate, 10% of polycarboxylic acid, 1% of azole, 1% of ammonia salt and the balance of water.
Further, the corrosion inhibitor comprises the following components in percentage by mass:
8% of phosphate, 7% of sulfonate, 17% of phosphonate, 15% of polycarboxylic acid, 5% of azole, 3% of ammonia salt and the balance of water.
Further, the corrosion inhibitor comprises the following components in percentage by mass:
15% of phosphate, 10% of sulfonate, 25% of phosphonate, 20% of polycarboxylic acid, 10% of azole, 5% of ammonia salt and the balance of water.
Further, the phosphate is sodium tripolyphosphate, the sulfonate is one of alkylsulfonic acid or sulfamic acid, the phosphonate is amino trimethylene phosphonic acid or ethylene diamine tetra methylene phosphonic acid or hydroxy-ethylene-bis-phosphoric acid, the polycarboxylic acid is one or two of polyacrylic acid, sodium polyacrylate or hydrolyzed polymaleic anhydride, the azole is one of benzotriazole, methylbenzothiazole or mercaptobenzothiazole, and the ammonium salt is one of ammonium bifluoride or diammonium bifluoride.
A preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps:
the method comprises the following steps: adding water into a container, adding phosphate and sulfonate solids, stirring and dissolving to obtain a dissolved solution;
step two: adding phosphonate and polycarboxylic acid liquid into the dissolved solution, and stirring and mixing uniformly;
step three: finally, adding azole, adding ammonia salt and stirring to obtain a finished product, thereby preparing the corrosion inhibitor.
Further, the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the agent is a multifunctional and multipurpose composite scale and corrosion inhibitor, is suitable for various water treatment systems and various water quality requirements, can be directly added into the water treatment system, and can better prevent and remove silicate scales under the precondition of having the functions of scale inhibition, scale removal, corrosion inhibition, high concentration ratio and the like, thereby realizing the real non-scale and non-corrosion of a circulating water system, improving the concentration ratio of circulating water, saving the water cost and the cost of water treatment agents, and the agent has simple production and wide application.
The scale and corrosion inhibitor provided by the invention has the following two characteristics:
(1) the scale and corrosion inhibitor has extremely strong capability of changing the crystal lattice of calcium carbonate, namely when the calcium carbonate in water is in a supersaturated state, the calcite form of the calcium carbonate is changed into the aragonite form, and the hexahedron is changed into the polyhedron or the sphere to form the water slag through the action of the corrosion inhibitor; because the water slag has poor adhesive capacity, the sediment is removed under the action of water flow.
(2) The inhibitor of the invention is added with the agent component ammonium bifluoride or diammonium bifluoride for removing silicate scale, so that the application effect is newly improved and changed; because of the addition of ammonium bifluoride or diammonium bifluoride, under the condition of ion state in water, the ammonium bifluoride or diammonium bifluoride is hydrolyzed to produce hydrofluoric acid, which is a weak inorganic acid and has strong dissolving capacity for silicon compound, on the other hand, it also has strong removing action for iron oxide, so that it can effectively prevent and eliminate silicate scale in boiler.
Detailed Description
The invention is illustrated by the following specific examples, which are not intended to be limiting.
Example 1
A multifunctional scale and corrosion inhibitor comprises the following components in percentage by mass:
1% of phosphate, 5% of sulfonate, 10% of phosphonate, 10% of polycarboxylic acid, 1% of azole, 1% of ammonia salt and the balance of water.
The phosphate is sodium tripolyphosphate, the sulfonate is alkylsulfonic acid, the phosphonate is amino trimethylene phosphonic acid and ethylene diamine tetramethylene phosphonic acid, the polycarboxylic acid is polyacrylic acid, the azole is benzotriazole, and the ammonia salt is ammonium bifluoride.
A preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps:
the method comprises the following steps: adding water, sodium tripolyphosphate and alkyl sulfonic acid into a container, and stirring for dissolving to obtain a solution;
step two: adding amino trimethylene phosphonic acid, ethylene diamine tetramethylene phosphonic acid and polyacrylic acid into the solution, and stirring and mixing uniformly;
step three: and finally, adding benzotriazole and ammonium bifluoride, and stirring to obtain a finished product to prepare the corrosion inhibitor.
Further, the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
Example 2
A multifunctional scale and corrosion inhibitor comprises the following components in percentage by mass:
5% of phosphate, 6% of sulfonate, 15% of phosphonate, 13% of polycarboxylic acid, 4% of azole, 2% of ammonia salt and the balance of water.
The phosphate is sodium tripolyphosphate, the sulfonate is alkylsulfonic acid, the phosphonate is amino trimethylene phosphonic acid and ethylene diamine tetramethylene phosphonic acid, the polycarboxylic acid is sodium polyacrylate, the azole is methylbenzothiazole, and the ammonia salt is diammonium hydrogen fluoride.
A preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps:
the method comprises the following steps: adding water, sodium tripolyphosphate and alkyl sulfonic acid into a container, and stirring for dissolving to obtain a solution;
step two: adding amino trimethylene phosphonic acid, ethylene diamine tetra methylene phosphonic acid and sodium polyacrylate into the dissolved solution, and stirring and mixing uniformly;
step three: and finally, adding methylbenzothiazole, adding diammonium hydrogen fluoride, and stirring to obtain a finished product, thereby preparing the corrosion inhibitor.
Further, the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
Example 3
8% of phosphate, 7% of sulfonate, 17% of phosphonate, 15% of polycarboxylic acid, 5% of azole, 3% of ammonia salt and the balance of water.
The phosphate is sodium tripolyphosphate, the sulfonate is sulfamic acid, the phosphonate is amino trimethylene phosphonic acid and hydroxy ethyl diphosphate, the polycarboxylic acid is polyacrylic acid and sodium polyacrylate, the azole is mercaptobenzothiazole, and the ammonium salt is ammonium bifluoride.
A preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps:
the method comprises the following steps: adding water, sodium tripolyphosphate and sulfamic acid into a container, and stirring for dissolving to obtain a dissolved solution;
step two: adding amino trimethylene phosphonic acid, hydroxyl ethyl diphosphonic acid, polyacrylic acid and sodium polyacrylate into the dissolved solution, and stirring and mixing uniformly;
step three: and finally adding mercaptobenzothiazole, adding ammonium bifluoride, and stirring to obtain a finished product, thereby preparing the corrosion inhibitor.
Further, the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
Example 4
A multifunctional scale and corrosion inhibitor comprises the following components in percentage by mass:
10% of phosphate, 8% of sulfonate, 20% of phosphonate, 117% of polycarboxylic acid, 7% of azole, 4% of ammonia salt and the balance of water.
The phosphate is sodium tripolyphosphate, the sulfonate is sulfamic acid, the phosphonate is amino trimethylene phosphonic acid and hydroxy ethyl diphosphate, the polycarboxylic acid is polyacrylic acid and hydrolyzed polymaleic anhydride, the azole is benzotriazole, and the ammonium salt is diammonium hydrogen fluoride.
A preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps:
the method comprises the following steps: adding water, sodium tripolyphosphate and sulfamic acid into a container, and stirring for dissolving to obtain a dissolved solution;
step two: adding amino trimethylene phosphonic acid, hydroxy ethyl diphosphonic acid, polyacrylic acid and hydrolytic polymaleic anhydride into the dissolved solution, and stirring and mixing uniformly;
step three: and finally, adding benzotriazole, adding diammonium hydrogen fluoride, and stirring to obtain a finished product, thereby preparing the corrosion inhibitor.
Further, the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
Example 5
A multifunctional scale and corrosion inhibitor comprises the following components in percentage by mass:
15% of phosphate, 10% of sulfonate, 25% of phosphonate, 20% of polycarboxylic acid, 10% of azole, 5% of ammonia salt and the balance of water.
The phosphate is sodium tripolyphosphate, the sulfonate is sulfamic acid, the phosphonate is ethylenediamine tetramethylene phosphonic acid and hydroxy-ethylene-bis-phosphoric acid, the polycarboxylic acid is sodium polyacrylate and hydrolyzed polymaleic anhydride, the azole is methylbenzothiazole, and the ammonia salt is ammonium bifluoride.
A preparation method of a multifunctional scale and corrosion inhibitor comprises the following steps:
the method comprises the following steps: adding water, sodium tripolyphosphate and sulfamic acid into a container, and stirring for dissolving to obtain a dissolved solution;
step two: adding ethylenediamine tetramethylene phosphonic acid, hydroxyl-ethyl-diphosphonic acid, sodium polyacrylate and hydrolyzed polymaleic anhydride into the dissolved solution, and stirring and mixing uniformly;
step three: and finally, adding methylbenzothiazole, adding ammonium bifluoride, and stirring to obtain a finished product, thereby preparing the corrosion inhibitor.
Further, the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
Content of the experiment
Selecting 3 calcium carbonate scale samples and 3 calcium silicate scale samples, weighing and numbering the calcium carbonate scale samples and the calcium silicate scale samples respectively, wherein the numbers are number 1, number 2, number 3, number 4, number 5 and number 6, and then using the corrosion inhibitor in the embodiment 5 of the invention, wherein the corrosion inhibitor comprises the following components except ammonium salt: 15% of phosphate, 10% of sulfonate, 25% of phosphonate, 20% of polycarboxylic acid, 10% of azole and the balance of water.
Wherein, the corrosion inhibitor used in the number 1 and the number 4 is not added with ammonium salt, the corrosion inhibitor used in the number 2 and the number 5 is added with 3 percent of ammonium salt, the corrosion inhibitor used in the number 3 and the number 6 is added with 5 percent of ammonium salt, wherein, the ammonium salt adopts ammonium bifluoride; and weighing 6 scale samples after the scale samples with the numbers 1, 2, 3, 4, 5 and 6 are subjected to corrosion inhibitor application for 15 hours, and calculating the weight loss of each scale sample.
Specifically, table 1 is a calcium carbonate scale dissolution test record, and table 2 is a calcium silicate dissolution test record, note: AB-970 is the type of multifunctional scale and corrosion inhibitor, and the test dosage and unit are 100 g.
TABLE 1 calcium carbonate Scale dissolution test record
As can be seen from Table 1, the weight loss of No. 3 is the largest, the dissolution effect of the No. 3 medicament is the best compared with that of calcium carbonate scale, and the residue after dissolution is less.
TABLE 2 calcium silicate dissolution test record
As can be seen from Table 2, the maximum weight loss of No. 6 medicament ratio of No. 6 has the best dissolution effect on calcium silicate scale, and the scale sample is looser and gradually dissolved.
Therefore, the corrosion inhibitor of the invention is added with the medicament components of ammonium bifluoride or diammonium bifluoride, so that the application effect is improved and changed.
Finally, it should be noted that the above embodiments are only used for illustrating and not limiting the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the present invention without departing from the spirit and scope of the present invention, and all modifications or partial substitutions should be covered by the scope of the claims of the present invention.
Claims (7)
1. The multifunctional scale and corrosion inhibitor is characterized by comprising the following components in percentage by mass:
1-15% of phosphate, 5-10% of sulfonate, 10-25% of phosphonate, 10-20% of polycarboxylic acid, 1-10% of azole, 1-5% of ammonia salt and the balance of water.
2. The multifunctional scale and corrosion inhibitor according to claim 1, which is characterized by comprising the following raw materials in parts by weight:
1% of phosphate, 5% of sulfonate, 10% of phosphonate, 10% of polycarboxylic acid, 1% of azole, 1% of ammonia salt and the balance of water.
3. The multifunctional scale and corrosion inhibitor according to claim 1, which is characterized by comprising the following raw materials in parts by weight:
8% of phosphate, 7% of sulfonate, 17% of phosphonate, 15% of polycarboxylic acid, 5% of azole, 3% of ammonia salt and the balance of water.
4. The multifunctional scale and corrosion inhibitor according to claim 1, which is characterized by comprising the following raw materials in parts by weight:
15% of phosphate, 10% of sulfonate, 25% of phosphonate, 20% of polycarboxylic acid, 10% of azole, 5% of ammonia salt and the balance of water.
5. The multifunctional scale and corrosion inhibitor according to any one of claims 1 to 4,
the phosphate adopts sodium tripolyphosphate and is prepared by mixing the components,
the sulfonate adopts one of alkyl sulfonic acid or sulfamic acid,
the phosphonate adopts two of amino trimethylene phosphonic acid, ethylene diamine tetra methylene phosphonic acid or hydroxy ethide diphosphonic acid,
the polycarboxylic acid is one or two of polyacrylic acid, sodium polyacrylate or hydrolyzed polymaleic anhydride,
the azole is one of benzotriazole, methylbenzothiazole or mercaptobenzothiazole,
the ammonia salt is one of ammonium bifluoride or diammonium bifluoride.
6. The preparation method of the multifunctional scale and corrosion inhibitor of claim 5, which is characterized by comprising the following steps:
the method comprises the following steps: adding water into a container, adding phosphate and sulfonate solids, stirring and dissolving to obtain a dissolved solution;
step two: adding phosphonate and polycarboxylic acid liquid into the dissolved solution, and stirring and mixing uniformly;
step three: finally, adding azole, adding ammonia salt and stirring to obtain a finished product, thereby preparing the corrosion inhibitor.
7. The preparation method of the multifunctional scale and corrosion inhibitor of claim 6, which is characterized by comprising the following steps:
the raw materials are mixed and stirred in a stirrer at the normal temperature of 25 ℃.
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