CN108821452A - The slow-release scale inhibitor of industrial circulating water system - Google Patents
The slow-release scale inhibitor of industrial circulating water system Download PDFInfo
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- CN108821452A CN108821452A CN201810688299.2A CN201810688299A CN108821452A CN 108821452 A CN108821452 A CN 108821452A CN 201810688299 A CN201810688299 A CN 201810688299A CN 108821452 A CN108821452 A CN 108821452A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
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- 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
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- 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)
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- Agricultural Chemicals And Associated Chemicals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention proposes a kind of slow-release scale inhibitors of industrial circulating water system, according to the number of parts by weight, composed of the following components：15~25 parts of sodium humate, 15~25 parts of modified polyaspartic acid, 10~20 parts of Sodium Polyacrylate, 10~20 parts of tetrasodium ethylenediamine tetraacetate, 5~10 parts of zinc salt and 10~15 parts of mercaptobenzothiazoler；Modified polyaspartic acid mainly passes through lignin sulfonic acid and is prepared with oxalic acid modification.The antisludging agent solves environmental problem caused by the phosphorous medicament in existing phosphorous recirculated cooling water, has good scale-inhibiting properties to calcium carbonate and calcium phosphate.
Description
Technical field
The invention belongs to water treatment agent technical fields, and in particular to a kind of slow-release scale inhibitor of industrial circulating water system.
Background technique
Antisludging agent is with the slightly solubility inorganic salts that can be dispersed in water, inhibits or interferes with slightly solubility inorganic salts in metal watch
Precipitating, the fouling function in face, and metal equipment is maintained to have a kind of medicament of good heat-transfer effect.Cold exchange device antiseptic corrosion inhibitor
Using epoxy resin and specific amino resin as base-material, suitable various auxiliary agents are added and configure, is one pack system.It has excellent
Shielding, impervious, rustless property, good scale inhibition, thermal conductivity, the performances such as excellent weak acid resistant, highly basic, organic solvent, it
Adhesive force is strong, and film layer is bright, flexible, fine and close, hard.
Recirculated water plays the important and pivotal role in boiler system, but recirculated water intensity used is high, basicity is big, tool
There is serious scale feature, when water temperature is higher than under the various occasions of environment temperature, the fouling of the inorganic salts such as calcium carbonate can be brought seriously
Consequence.When being used for industrial circulating water system as circulatory mediator, water quality deterioration can be caused, corrosion and scaling etc. occurs and asks
Topic, leads to boiler and its line clogging or leakage, seriously affects process units normal operation.With the rapid development of social economy
With the progress of technology, water treatment technology is paid more and more attention, and fouling can be effectively prevent by using water treatment agent, to improve
Equipment and the utilization rate of water and achieve the purpose that save water source and the energy.Poly-aspartate is a kind of novel biodegradable
Environmentally friendly high molecular material, raw material are easy to get, are inexpensive, are widely used for water treatment agent, detergent, makeup in recent years
The fields such as product, bacteriostatic agent, dispersing agent, chelating agent, pesticide, agrochemical.Due to the feature on poly-aspartate molecular structure, easily
With adsorption of metal ions or combination, therefore have the function of preventing scale.Poly-aspartate is because having good biocompatibility
It is not phosphorous, it has also become hot spot studied both at home and abroad at present, but to the scale-inhibiting properties and dispersibility of calcium carbonate, calcium phosphate one
Determine to make its application receive certain limitation not as good as now widely used acrylic acid and Malaysia acids polymers in situation.
Summary of the invention
The present invention proposes a kind of slow-release scale inhibitor of industrial circulating water system, which solves existing phosphorous circulation
Environmental problem caused by phosphorous medicament in cooling water has good scale-inhibiting properties to calcium carbonate and calcium phosphate.
The technical proposal of the invention is realized in this way：
A kind of slow-release scale inhibitor of industrial circulating water system, it is according to the number of parts by weight, composed of the following components：
15~25 parts of sodium humate, 15~25 parts of modified polyaspartic acid, 10~20 parts of Sodium Polyacrylate, ethylenediamine tetrem
Sour 10~20 parts of four sodium, 5~10 parts of zinc salt and 10~15 parts of mercaptobenzothiazoler；The modified polyaspartic acid mainly passes through
Lignin sulfonic acid is prepared with oxalic acid modification.
The preparation method of the modified polyaspartic acid includes the following steps：
1) configuration of maleic anhydride aqueous solution：It is added drop-wise to after urea is dissolved in water in the aqueous solution of maleic anhydride, then
It in 106~110 DEG C of progress amination hydrolysis, is cooled to room temperature, adds sodium bisulfate catalysis agent, in the mixed of sulfuric acid and hydrochloric acid
It closes to react under 120~135 DEG C of vacuum conditions in sour solvent and obtains polysuccinimide；
2) after polysuccinimide being taken out cooling, using dimethyl sulfoxide as solvent, lignin sulfonic acid and oxalic acid is added in oil
1.5~2.5h is reacted in bath in 100~110 DEG C, it is cooling, dehydrated alcohol washing, drying is added, it is modified poly- to obtain final product
Aspartic acid.
Further, the ratio between sulfuric acid and the volume of the hydrochloric acid described in the mixing sour solvent are 1~1.5:1.
Further, the concentration of the sulfuric acid is 10~15mol/L, and the concentration of the hydrochloric acid is 5~8mol/L.
Further, the molar ratio of the polysuccinimide, the lignin sulfonic acid and the oxalic acid is 1:0.8~1.2:
0.2~0.5.
Further, the step 2) further includes adding in the system after reacting poly- succinamide with oxalic acid with lignin sulfonic acid
Enter after alkali adjusts pH to 8~10,40~60 DEG C of 30~50min of hydrolysis and adds dehydrated alcohol washing.
Further, the zinc salt is zinc chloride or zinc sulfate.
The preparation method of the slow-release scale inhibitor of industrial circulating water system of the invention：It mixes the above components evenly i.e.
It can.
Beneficial effects of the present invention：
1, the slow-release scale inhibitor of industrial circulating water system of the invention sodium humate therein and modified poly- asparagus fern ammonia
Acid, Sodium Polyacrylate have synergistic effect well, can effectively remove impurity, the chloride ion and sulfate ion of resisting high-concentration
Corrosion, be recirculated water high concentration multiple operation even zero blowdown operation, reduce sewage discharge provide condition.It prevents from recycling
Water reaches 99.0%~99.6% to the fouling blockage of metallic conduit, scale inhibition effect so that its fouling rate be reduced to 0.00245~
0.00312mm/a.Slow-release scale inhibitor usage amount of the invention is that 10~20mg is added in every 1 liter of water.
2, the preparation method of modified polyaspartic acid, the polysuccinimide being prepared are using dimethyl sulfoxide as solvent
Catalyst with oxalic acid as lignin sulfonic acid, without using the thiocarbamide with carcinogenicity as catalyst, so that finally obtaining
The modified polyaspartic acid obtained contains sulfonic acid group and carboxylic acid group, improves the comprehensive performance of its antiscaling dispersion, and have good
Good corrosion inhibition and biodegradability does not have to worry carcinogenic etc. adversely impact applied to recirculated cooling water.
3, modified polyaspartic acid is nontoxic, without phosphorus, does not destroy natural ecological environment, has scale inhibition, inhibition and biological can drop
Performance is solved, can be improved poly-aspartate to the scale-inhibiting properties of calcium carbonate and calcium phosphate, while obtaining efficient scale efficiency,
The advantages that nontoxic to environment with low production cost, scale inhibition is high-efficient, biodegradable.
Specific embodiment
Embodiment 1
A kind of preparation method of modified polyaspartic acid, includes the following steps：
1) configuration of maleic anhydride aqueous solution：It is added drop-wise to after urea is dissolved in water in the aqueous solution of maleic anhydride, then
In 108 DEG C of progress amination hydrolysis, it is cooled to room temperature, adds sodium bisulfate catalysis agent, in the mixed acid of sulfuric acid and hydrochloric acid
Reaction obtains polysuccinimide under 125 DEG C of vacuum conditions in solvent；Sulfuric acid described in the mixing sour solvent and the salt
The ratio between volume of acid is 1.2:1；The concentration of sulfuric acid is 12mol/L, and the concentration of the hydrochloric acid is 7mol/L
2) after polysuccinimide being taken out cooling, using dimethyl sulfoxide as solvent, lignin sulfonic acid and oxalic acid is added in oil
2h is reacted in 105 DEG C in bath, it is cooling, alkali is added and adjusts pH to 9,50 DEG C of hydrolysis 40min, dehydrated alcohol is added and washs, is dry,
Obtain final product modified polyaspartic acid.The molar ratio of polysuccinimide, the lignin sulfonic acid and the oxalic acid is 1:
1:0.3。
Embodiment 2
A kind of preparation method of modified polyaspartic acid, includes the following steps：
1) configuration of maleic anhydride aqueous solution：It is added drop-wise to after urea is dissolved in water in the aqueous solution of maleic anhydride, then
In 106 DEG C of progress amination hydrolysis, it is cooled to room temperature, adds sodium bisulfate catalysis agent, in the mixed acid of sulfuric acid and hydrochloric acid
Reaction obtains polysuccinimide under 135 DEG C of vacuum conditions in solvent；Mix sulfuric acid described in sour solvent and the hydrochloric acid
The ratio between volume is 1:1；The concentration of sulfuric acid is 10mol/L, and the concentration of hydrochloric acid is 8mol/L.
2) after polysuccinimide being taken out cooling, using dimethyl sulfoxide as solvent, lignin sulfonic acid and oxalic acid is added in oil
2.5h is reacted in 100 DEG C in bath, it is cooling, alkali is added and adjusts pH to 8,40 DEG C of hydrolysis 50min, dehydrated alcohol is added and washs, is dry
It is dry, obtain final product modified polyaspartic acid.Polysuccinimide, the lignin sulfonic acid and the oxalic acid molar ratio be
1:0.8.2:0.5。
Embodiment 3
A kind of preparation method of modified polyaspartic acid, includes the following steps：
1) configuration of maleic anhydride aqueous solution：It is added drop-wise to after urea is dissolved in water in the aqueous solution of maleic anhydride, then
In 110 DEG C of progress amination hydrolysis, it is cooled to room temperature, adds sodium bisulfate catalysis agent, in the mixed acid of sulfuric acid and hydrochloric acid
Reaction obtains polysuccinimide under 120 DEG C of vacuum conditions in solvent；Mix sulfuric acid described in sour solvent and the hydrochloric acid
The ratio between volume is 1.5:1；The concentration of sulfuric acid is 15mol/L, and the concentration of hydrochloric acid is 5mol/L.
2) after polysuccinimide being taken out cooling, using dimethyl sulfoxide as solvent, lignin sulfonic acid and oxalic acid is added in oil
1.5h is reacted in 110 DEG C in bath, it is cooling, alkali is added and adjusts pH to 10,60 DEG C of hydrolysis 30min, dehydrated alcohol is added and washs, is dry
It is dry, obtain final product modified polyaspartic acid.The molar ratio of polysuccinimide, lignin sulfonic acid and oxalic acid is 1:1.2:
0.2。
Embodiment 4
A kind of slow-release scale inhibitor of industrial circulating water system, it is according to the number of parts by weight, composed of the following components：
20 parts of sodium humate, 25 parts of modified polyaspartic acid, 16 parts of Sodium Polyacrylate, 14 parts of tetrasodium ethylenediamine tetraacetate,
8 parts of zinc chloride and 12 parts of mercaptobenzothiazoler.
Embodiment 5
A kind of slow-release scale inhibitor of industrial circulating water system, it is according to the number of parts by weight, composed of the following components：
15 parts of sodium humate, 25 parts of modified polyaspartic acid, 20 parts of Sodium Polyacrylate, 10 parts of tetrasodium ethylenediamine tetraacetate,
10 parts of zinc sulfate and 10 parts of mercaptobenzothiazoler.
Embodiment 6
A kind of slow-release scale inhibitor of industrial circulating water system, it is according to the number of parts by weight, composed of the following components：
25 parts of sodium humate, 15 parts of modified polyaspartic acid, 10 parts of Sodium Polyacrylate, 20 parts of tetrasodium ethylenediamine tetraacetate,
5 parts of zinc sulfate and 15 parts of mercaptobenzothiazoler.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of slow-release scale inhibitor of industrial circulating water system, which is characterized in that according to the number of parts by weight, by following components
Composition：
15~25 parts of sodium humate, 15~25 parts of modified polyaspartic acid, 10~20 parts of Sodium Polyacrylate, ethylenediamine tetra-acetic acid four
10~20 parts of sodium, 5~10 parts of zinc salt and 10~15 parts of mercaptobenzothiazoler；The modified polyaspartic acid is mainly by wooden
Plain sulfonic acid is prepared with oxalic acid modification.
2. the slow-release scale inhibitor of industrial circulating water system according to claim 1, which is characterized in that the poly- day of modification
The preparation method of aspartic acid includes the following steps：
1) configuration of maleic anhydride aqueous solution：It is added drop-wise to after urea is dissolved in water in the aqueous solution of maleic anhydride, then in 106
~110 DEG C of progress amination hydrolysis, are cooled to room temperature, add sodium bisulfate catalysis agent, in the mixed acid of sulfuric acid and hydrochloric acid
Reaction obtains polysuccinimide under 120~135 DEG C of vacuum conditions in solvent；
2) after polysuccinimide being taken out cooling, using dimethyl sulfoxide as solvent, lignin sulfonic acid and oxalic acid is added in oil bath pan
In 1.5~2.5h is reacted in 100~110 DEG C, it is cooling, dehydrated alcohol washing, dry is added, obtains the modified poly- asparagus fern of final product
Propylhomoserin.
3. the slow-release scale inhibitor of industrial circulating water system according to claim 2, which is characterized in that the sulfuric acid it is dense
Degree is 10~15mol/L, and the concentration of the hydrochloric acid is 5~8mol/L.
4. the slow-release scale inhibitor of industrial circulating water system according to claim 3, which is characterized in that the mixed acid is molten
The ratio between volume of sulfuric acid described in agent and the hydrochloric acid is 1~1.5:1.
5. the slow-release scale inhibitor of industrial circulating water system according to claim 2, which is characterized in that the poly- succinyl
The molar ratio of imines, the lignin sulfonic acid and the oxalic acid is 1:0.8~1.2:0.2~0.5.
6. the slow-release scale inhibitor of industrial circulating water system according to claim 2, which is characterized in that the step 2) is also
PH to 8~10,40~60 DEG C is adjusted including alkali is added in the system after reacting poly- succinamide with oxalic acid with lignin sulfonic acid
Dehydrated alcohol washing is added after 30~50min of hydrolysis.
7. the slow-release scale inhibitor of industrial circulating water system according to claim 1, which is characterized in that the zinc salt is chlorine
Change zinc or zinc sulfate.
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| CN201810688299.2A CN108821452A (en) | 2018-06-28 | 2018-06-28 | The slow-release scale inhibitor of industrial circulating water system |
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| CN201810688299.2A CN108821452A (en) | 2018-06-28 | 2018-06-28 | The slow-release scale inhibitor of industrial circulating water system |
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Cited By (2)
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| CN111620449A (en) * | 2020-07-07 | 2020-09-04 | 北京尤洁科技有限公司 | Phosphorus-free nitrogen-free green environment-friendly hot water boiler water treatment agent |
| CN116969610A (en) * | 2023-09-13 | 2023-10-31 | 杭州尚善若水环保科技有限公司 | Mixed corrosion and scale inhibitor |
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Application publication date: 20181116 |