CN110040858A - A kind of degradable non-phosphorus composite scale inhibitor and preparation method thereof - Google Patents
A kind of degradable non-phosphorus composite scale inhibitor and preparation method thereof Download PDFInfo
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- CN110040858A CN110040858A CN201910294867.5A CN201910294867A CN110040858A CN 110040858 A CN110040858 A CN 110040858A CN 201910294867 A CN201910294867 A CN 201910294867A CN 110040858 A CN110040858 A CN 110040858A
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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
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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
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Abstract
The present invention relates to a kind of degradable non-phosphorus composite scale inhibitors and preparation method thereof, in parts by weight include: 20-30 parts of poly-aspartate, 15-20 parts of Sodium Polyacrylate, 5-8 parts of lignosulfonates, 10-15 parts of cyclodextrin compound stabilizer, 8-10 parts of water.On the one hand lignosulfonates are used as dispersing agent that other components are evenly dispersed in water, on the other hand use due to having sulfonic group to can be used as antisludging agent in its molecule.Poly-aspartate and Sodium Polyacrylate are re-dubbed antisludging agent, have synergistic effect.Cyclodextrin encapsulated stabilizer forms cyclodextrin compound stabilizer, and the anion contained not only makes it have scale effect, and stabilizer slow release has protective effect to poly-aspartate, increases the stability and service life of antisludging agent.It is not phosphorous and degradable in antisludging agent, it is environmentally protective.
Description
Technical field
The present invention relates to water-treatment technology field more particularly to a kind of degradable non-phosphorus composite scale inhibitor and its preparation sides
Method.
Background technique
Recirculating cooling water system is commonly used in industrial production, in use due to moisture evaporation and pH variation,
Temperature such as increases at the influence of factors, the alkaline earth metal cation such as Ca contained in water2+、Mg2+、Ba2+Deng the SO in meeting and water4 2-、
CO3 2-、HCO3 -、OH-、PO4 3-、SiO3 2-Equal anion generate slightly solubility inorganic salts, pipeline and deposited on surface of heat exchanger at
Dirt forms the scale being commonly called as, and water pipe and heat exchanger heat transfer efficiency is easy to cause to reduce and corrode.Solve above-mentioned recirculated cooling water
In system at the method for dirty problem be using addition antisludging agent, antisludging agent have can inhibit or interfere with slightly solubility inorganic salts in container
Surface precipitating, the function of structure.
Currently, organic phosphoric acid antisludging agent especially organic multicomponent phosphoric acid and its salt have stable chemical performance, high temperature resistant, resistance to
The features such as higher pH and significantly " threshold effect " and " synergistic effect ", therefore be widely used.But phosphorous water treatment agent
Not degradable or degradation releases Phos, phosphorous in the water that recirculating cooling water system is discharged, and will cause serious environment
Pollution, makes water eutrophication, water quality deterioration.
Summary of the invention
The purpose of the present invention one is to provide a kind of degradable non-phosphorus composite scale inhibitor, and not phosphorous, degradable and stability is strong.
Above-mentioned purpose of the invention has the technical scheme that a kind of degradable without phosphorus composite scale
Agent includes: in parts by weight
20-30 parts of poly-aspartate
15-20 parts of Sodium Polyacrylate
5-8 parts of lignosulfonates
10-15 parts of cyclodextrin compound stabilizer
8-10 parts of water.
By using above-mentioned technical proposal, on the one hand lignosulfonates are used as dispersing agent to be dispersed in other components
In water, on the other hand used due to having sulfonic group to can be used as antisludging agent in its molecule.Poly-aspartate and Sodium Polyacrylate are multiple
It is made into antisludging agent, there is synergistic effect.Cyclodextrin encapsulated stabilizer forms cyclodextrin compound stabilizer, and the anion contained is not only
Make it have scale effect, stabilizer slow release has protective effect to poly-aspartate, increase antisludging agent stability and
Service life.It is not phosphorous and degradable in antisludging agent, it is environmentally protective.
The present invention is further arranged to: the cyclodextrin compound stabilizer includes cyclodextrin and stabilizer, the stabilizer
For the wherein at least one of potassium sorbate or sodium benzoate, the molar ratio of the cyclodextrin and stabilizer is 1:1-1:2.
By using above-mentioned technical proposal, potassium sorbate and sodium benzoate have anti-corrosion and bactericidal effect, avoid poly- asparagus fern
Propylhomoserin is increased the service life of the scale inhibition of antisludging agent in water by premature decomposition.And contain carboxylic in potassium sorbate and sodium benzoate
Acidic group has scale effect.
The present invention is further arranged to: the stabilizer includes potassium sorbate and sodium benzoate, the potassium sorbate and benzene
The molar ratio of sodium formate is 1:1-3:1.
By using above-mentioned technical proposal, potassium sorbate and sodium benzoate all have sterilization and anticorrosion effect, and compounding increases whole
The spectrum sterilizing ability of a cyclodextrin compound stabilizer.
The present invention is further arranged to: the preparation method of the cyclodextrin compound stabilizer the following steps are included:
A1, cyclodextrin is added in ethyl acetate, stirring to cyclodextrin is completely dissolved；
A2, stabilizer is added in the solution of A1 preparation, is heated to 40-45 DEG C, 400-500r/min is stirred 6 hours；
A3, the step A2 solution prepared is cooled to room temperature, removes ethyl acetate.
By using above-mentioned technical proposal, stabilizer is coated in cyclodextrin, can be sustained when in use, scale inhibition is increased
The long-term stability used of agent.
The present invention is further arranged to: the cyclodextrin is beta-cyclodextrin.
By using above-mentioned technical proposal, stabilizer is coated preferable.
The present invention is further arranged to: the molecular weight of the Sodium Polyacrylate is 2000-5000.
By using above-mentioned technical proposal, guarantee the dissolubility of polypropylene in water, and to guarantee Sodium Polyacrylate right
Metal ion will not flocculate or precipitate after being complexed.
The present invention is further arranged to: the molecular weight of the lignosulfonates is 2000-8000.
By using above-mentioned technical proposal, making lignosulfonates in water has good dissolubility and to other groups
The dispersibility divided.
The purpose of the present invention two is to provide a kind of method for preparing above-mentioned degradable non-phosphorus composite scale inhibitor, including following step
It is rapid:
B1, lignosulfonates are added to the water, 400-600r/min, which is stirred to lignosulfonates, to be completely dissolved to obtain wood
Mahogany sulfonate solution；
B2, poly-aspartate, Sodium Polyacrylate and cyclodextrin compound stabilizer are uniformly mixed, prepare mixed liquor；
B3, the mixed liquor of B2 preparation is added in the lignosulfonate solutions of step B1 preparation, is uniformly mixed.
By using above-mentioned technical proposal, lignosulfonates are initially dissolved in water and form homogeneous solution, to other
Component has preferable peptizaiton.Poly-aspartate, Sodium Polyacrylate are mixed and are dissolved to cyclodextrin compound stabilizer, are mixed
Solution after conjunction is added to lignosulfonate solutions and forms stable liquid antisludging agent.
In conclusion advantageous effects of the invention are as follows:
1, the functional group's multiplicity for the scale inhibition that other components in scale inhibition than water all have scale effect, and contain, has association
Same-action is conducive to increase the scale prevention ability of antisludging agent, does not contain phosphorus in antisludging agent, avoids using the water being discharged after antisludging agent to all
The pollution of environment；
2, by adding stabilizer in antisludging agent, not only there is scale effect, there is protective effect to poly-aspartate, increase
The stability and service life of antisludging agent；
3, stabilizer is coated on formation cyclodextrin compound stabilizer in cyclodextrin, and stabilizer is delayed in the use process of antisludging agent
On The Drug Release is conducive to the stability for increasing antisludging agent.
Specific embodiment
Embodiment 1
A kind of degradable non-phosphorus composite scale inhibitor, preparation method include the following steps:
(1) preparation (according to parts by weight) of cyclodextrin compound stabilizer:
A1,1 part of beta-cyclodextrin is added in 5 parts of ethyl acetate, stirring to beta-cyclodextrin is completely dissolved；
A2, stabilizer is added in the solution of A1 preparation, is heated to 40-45 DEG C, 500r/min is stirred 6 hours；
Wherein, the molar ratio of beta-cyclodextrin and stabilizer is 1:1.8, and stabilizer includes potassium sorbate and sodium benzoate, sorbic acid
The molar ratio of potassium and sodium benzoate is 2:1；
A3, the step A2 solution prepared is cooled to room temperature, rotary evaporation in vacuo removes ethyl acetate, and vacuum drying obtains ring paste
Smart compound stabilizer；
(2) preparation (according to parts by weight) of antisludging agent:
B1, the sodium lignin sulfonate that 7 parts of molecular weight are 2000-4000 is added to the water, 600r/min is stirred to sulfomethylated lignin
Sour sodium is completely dissolved to obtain lignin sulfonic acid sodium solution；
It is B2,30 parts of poly-aspartates, the Sodium Polyacrylate that 18 parts of molecular weight are 2000-4000 and 12 parts of cyclodextrin are compound steady
Determine agent to be uniformly mixed, prepares mixed liquor；
B3, the mixed liquor of B2 preparation is added in the lignin sulfonic acid sodium solution of step B1 preparation, is uniformly mixed and gets product.
Embodiment 2
Embodiment 2 the difference from embodiment 1 is that:
Cyclodextrin in step (1) is alpha-cyclodextrin.
Embodiment 3
Embodiment 3 the difference from embodiment 1 is that:
Cyclodextrin in step (1) is gamma-cyclodextrin.
Embodiment 4
Embodiment 4 the difference from embodiment 1 is that:
The molar ratio of the beta-cyclodextrin and stabilizer that are added in step (1) is 1:1.
Embodiment 5
Embodiment 5 the difference from embodiment 1 is that:
The molar ratio of the beta-cyclodextrin and stabilizer that are added in step (1) is 1:1.3.
Embodiment 6
Embodiment 6 the difference from embodiment 1 is that:
The molar ratio of the beta-cyclodextrin and stabilizer that are added in step (1) is 1:1.5.
Embodiment 7
Embodiment 7 the difference from embodiment 1 is that:
The molar ratio of the beta-cyclodextrin and stabilizer that are added in step (1) is 1:2.
Comparative example 1
Comparative example 1 the difference from embodiment 1 is that:
The molar ratio of the beta-cyclodextrin and stabilizer that are added in step (1) is 1:0.8.
Comparative example 2
Comparative example 2 the difference from embodiment 1 is that:
The molar ratio of the beta-cyclodextrin and stabilizer that are added in step (1) is 1:2.2.
Embodiment 8
Embodiment 8 the difference from embodiment 1 is that:
Stabilizer is only potassium sorbate, 400r/min stirring in step (1).
Embodiment 9
Embodiment 9 the difference from embodiment 1 is that:
Stabilizer is only sodium benzoate, 400r/min stirring in step (1).
Embodiment 10
Embodiment 10 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 0.5:1,450r/min stirring.
Embodiment 11
Embodiment 11 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 0.8:1,450r/min stirring.
Embodiment 12
Embodiment 12 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 1:1.
Embodiment 13
Embodiment 13 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 1.5:1.
Embodiment 14
Embodiment 14 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 2.5:1.
Embodiment 15
Embodiment 15 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 3:1.
Embodiment 16
Embodiment 16 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 3.2:1.
Embodiment 17
Embodiment 17 the difference from embodiment 1 is that, stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 3.5:1.
Embodiment 18
Embodiment 18 the difference from embodiment 1 is that:
The additional amount of poly-aspartate is 28 parts in step (2).
Embodiment 19
Embodiment 19 the difference from embodiment 1 is that:
The additional amount of poly-aspartate is 25 parts in step (2).
Embodiment 20
Embodiment 20 the difference from embodiment 1 is that:
The additional amount of poly-aspartate is 22 parts in step (2).
Embodiment 21
Embodiment 21 the difference from embodiment 1 is that:
The additional amount of poly-aspartate is 20 parts in step (2).
Comparative example 3
Comparative example 3 the difference from embodiment 1 is that:
The additional amount of poly-aspartate is 18 parts in step (2).
Comparative example 4
Comparative example 4 the difference from embodiment 1 is that:
The additional amount of poly-aspartate is 32 parts in step (2).
Embodiment 22
Embodiment 22 the difference from embodiment 1 is that:
The additional amount of Sodium Polyacrylate is 20 parts in step (2), molecular weight 4000-5000.
Embodiment 23
Embodiment 23 the difference from embodiment 1 is that:
The additional amount of Sodium Polyacrylate is 15 parts in step (2), molecular weight 1000-2000.
Comparative example 5
Comparative example 5 the difference from embodiment 1 is that:
The additional amount of Sodium Polyacrylate is 13 parts in step (2), molecular weight 1000-2000.
Comparative example 6
Comparative example 6 the difference from embodiment 1 is that:
The additional amount of Sodium Polyacrylate is 22 parts in step (2), molecular weight 5000-8000.
Embodiment 24
Embodiment 24 the difference from embodiment 1 is that:
The additional amount of sodium lignin sulfonate is 8 parts in step (2) B1, and the molecular weight of sodium lignin sulfonate is 4000-5000, water 10
Part, 400r/min stirring.
Embodiment 25
Embodiment 25 the difference from embodiment 1 is that:
The additional amount of sodium lignin sulfonate is 6 parts in step (2) B1, and the molecular weight of sodium lignin sulfonate is 1000-2000, water 9
Part, 500r/min stirring.
Embodiment 26
Embodiment 26 the difference from embodiment 1 is that:
The additional amount of sodium lignin sulfonate is 5 parts in step (2) B1, and the molecular weight of sodium lignin sulfonate is 5000-8000, water 8
Part, 550r/min stirring.
Comparative example 7
Comparative example 7 the difference from embodiment 1 is that:
The additional amount of sodium lignin sulfonate is 4 parts in step (2) B1, and the molecular weight of sodium lignin sulfonate is 10000-15000, water
20 parts.
Comparative example 8
Comparative example 8 the difference from embodiment 1 is that:
The additional amount of sodium lignin sulfonate is 9 parts in step (2) B1, and the molecular weight of sodium lignin sulfonate is 8000-12000, water
18 parts.
Embodiment 27
Embodiment 27 the difference from embodiment 1 is that:
The additional amount of step (2) B2 cyclodextrin compound stabilizer is 15 parts.
Embodiment 28
Embodiment 28 the difference from embodiment 1 is that:
The additional amount of step (2) B2 cyclodextrin compound stabilizer is 13 parts.
Embodiment 29
Embodiment 29 the difference from embodiment 1 is that:
The additional amount of step (2) B2 cyclodextrin compound stabilizer is 11 parts.
Embodiment 30
Embodiment 30 the difference from embodiment 1 is that:
The additional amount of step (2) B2 cyclodextrin compound stabilizer is 10 parts.
Comparative example 9
Comparative example 9 the difference from embodiment 1 is that:
The additional amount of step (2) B2 cyclodextrin compound stabilizer is 9 parts.
Comparative example 10
Comparative example 10 the difference from embodiment 1 is that:
The additional amount of step (2) B2 cyclodextrin compound stabilizer is 16 parts.
Comparative example 11
Comparative example 11 the difference from embodiment 1 is that:
Without step (1), it is added without cyclodextrin compound stabilizer in step (2), beta-cyclodextrin and totally 12 parts of stabilizer are added, wherein
The molar ratio of beta-cyclodextrin and stabilizer is 1:1.8, and stabilizer includes potassium sorbate and sodium benzoate, potassium sorbate and benzoic acid
The molar ratio of sodium is 2:1.
Comparative example 12
Comparative example 12 the difference from embodiment 1 is that:
Without step (1), step is added without cyclodextrin compound stabilizer in (2).
The embodiment 1-30 and comparative example 1-12 antisludging agent prepared is tested for the property, test result is shown in Table 1-7.
Wherein, wherein according to GB/T16632-2008 using the scale inhibition performance of static scale inhibition method measurement antisludging agent, test water temperature
80℃；Corrosion inhibition test is carried out according to GB/T18175-2000 rotary hanging plate method, stainless steel is tested, experiment water temperature is
80 DEG C, 75 revs/min of revolving speed, run 72h.
Table 1 implements the experimental result of the antisludging agent of 1-3 preparation
| Dosage (ppm) | Scale inhibition performance (%) | Corrosion rate (mm/a) | |
| Embodiment 1 | 100 | 99.6 | 0.0016 |
| Embodiment 2 | 100 | 99.5 | 0.0018 |
| Embodiment 3 | 100 | 99.4 | 0.0019 |
As shown in Table 1, the type of the cyclodextrin of cyclodextrin compound stabilizer is prepared to imitate the scale inhibition of the antisludging agent of preparation and inhibition
Fruit influences little.
Table 2 implements the experimental result of the antisludging agent of 1,4-7 and comparative example 1-2 preparation
| Dosage (ppm) | Scale inhibition performance (%) | Corrosion rate (mm/a) | |
| Embodiment 1 | 100 | 99.6 | 0.0016 |
| Embodiment 4 | 100 | 97.7 | 0.0020 |
| Embodiment 5 | 100 | 98.0 | 0.0018 |
| Embodiment 6 | 100 | 98.5 | 0.0020 |
| Embodiment 7 | 100 | 98.2 | 0.0019 |
| Comparative example 1 | 100 | 92.3 | 0.0022 |
| Comparative example 2 | 100 | 97.8 | 0.0019 |
As shown in Table 2, scale inhibition energy of the molar ratio of stabilizer and cyclodextrin to the antisludging agent of preparation in cyclodextrin compound stabilizer
Power has an impact, and is due to containing carboxylic acid group in stabilizer, carboxylic acid group makes stabilizer have scale effect.
Table 3 implements the experimental result of the antisludging agent of 1,8-17 preparation
As shown in Table 3, in the timing of stabilizer additional amount one, change scale inhibition of the ratio to antisludging agent of potassium sorbate and sodium benzoate
It is little with corrosion inhibiting ability.
Table 4 implements the experimental result of the antisludging agent of 1,18-21 and comparative example 3-4 preparation
| Dosage (ppm) | Scale inhibition performance (%) | Corrosion rate (mm/a) | |
| Embodiment 1 | 100 | 99.6 | 0.0016 |
| Embodiment 18 | 100 | 98.9 | 0.0019 |
| Embodiment 19 | 100 | 97.5 | 0.0023 |
| Embodiment 20 | 100 | 95.1 | 0.0027 |
| Embodiment 21 | 100 | 94.2 | 0.0032 |
| Comparative example 3 | 100 | 90.1 | 0.0045 |
| Comparative example 4 | 100 | 98.2 | 0.0020 |
As shown in Table 4, poly-aspartate has both scale inhibition and corrosion inhibition, plays main make to the major function of the antisludging agent of preparation
With.Additional amount is in the range of 18-30 parts, and with the increase of additional amount, the scale inhibition and corrosion inhibiting ability of antisludging agent integrally increase.For
Save the cost, in the case that other conditions are constant, being added 30 parts can achieve higher scale inhibition effect.
Table 5 implements the experimental result of the antisludging agent of 1,22-23 and comparative example 5-6 preparation
| Dosage (ppm) | Scale inhibition performance (%) | Corrosion rate (mm/a) | |
| Embodiment 1 | 100 | 99.6 | 0.0016 |
| Embodiment 22 | 100 | 99.1 | 0.0018 |
| Embodiment 23 | 100 | 98.7 | 0.0021 |
| Comparative example 5 | 100 | 95.6 | 0.0028 |
| Comparative example 6 | 100 | 97.2 | 0.0024 |
As shown in Table 5, the addition of Sodium Polyacrylate has synergy and synergistic effect to antisludging agent.
Table 6 implements the experimental result of the antisludging agent of 1,24-26 and comparative example 7-8 preparation
As shown in Table 6, the addition of sodium lignin sulfonate has peptizaiton, and the scale inhibition group of antisludging agent is enriched containing sulfonic group,
Improve the scale inhibitor ability of antisludging agent.
Table 7 implements the experimental result of the antisludging agent of 1,27-30 and comparative example 9-12 preparation
| Dosage (ppm) | Scale inhibition performance (%) | Corrosion rate (mm/a) | |
| Embodiment 1 | 100 | 99.6 | 0.0016 |
| Embodiment 27 | 100 | 99.7 | 0.0015 |
| Embodiment 28 | 100 | 99.6 | 0.0015 |
| Embodiment 29 | 100 | 98.4 | 0.0020 |
| Embodiment 30 | 100 | 97.5 | 0.0024 |
| Comparative example 9 | 100 | 93.5 | 0.0035 |
| Comparative example 10 | 100 | 93.9 | 0.0035 |
| Comparative example 11 | 100 | 99.0 | 0.0019 |
| Comparative example 12 | 100 | 90.3 | 0.0045 |
As shown in Table 7, the addition of cyclodextrin compound stabilizer and cyclodextrin and stabilizer are added simultaneously, and antisludging agent can be improved
Scale inhibition and corrosion inhibition.
The antisludging agent prepared to embodiment 1-17,27-30 and comparative example 1-2,9-12 carries out sterilizing rate test, measuring method
Method is referring to " heterotroph in " cooling water analysis and the test method " of production department, China Petrochemical Corporation and development division establishment
Static sterilization test ", antisludging agent is added by 100ppm when test, the bactericidal effect after testing different time, as a result such as table 8
It is shown.
As shown in Table 8, the addition of cyclodextrin compound stabilizer has the effect of sustained release sterilization, carries out to the water of processing longer
The bactericidal effect of time is conducive to the activity for keeping poly-aspartate in antisludging agent, increases the using effect of antisludging agent.Stabilizer
It is compounded in that slow release effect in beta-cyclodextrin is preferable, is since what the structure of beta-cyclodextrin can be compared with stabilizer answers
It closes.And the ratio of beta-cyclodextrin and stabilizer, in the range of 1:1-1:2, slow release effect is preferable.Stabilizer includes potassium sorbate
When with sodium benzoate, enhanced spectrum sterilization and anti-corrosion effect are conducive to after compound.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of degradable non-phosphorus composite scale inhibitor, which is characterized in that include: in parts by weight
20-30 parts of poly-aspartate
15-20 parts of Sodium Polyacrylate
5-8 parts of lignosulfonates
10-15 parts of cyclodextrin compound stabilizer
8-10 parts of water.
2. a kind of degradable non-phosphorus composite scale inhibitor according to claim 1, which is characterized in that the cyclodextrin is compound steady
Determining agent includes cyclodextrin and stabilizer, and the stabilizer is the wherein at least one of potassium sorbate or sodium benzoate, the ring paste
Essence and the molar ratio of stabilizer are 1:1-1:2.
3. a kind of degradable non-phosphorus composite scale inhibitor according to claim 2, which is characterized in that the stabilizer includes mountain
The molar ratio of potassium sorbate and sodium benzoate, the potassium sorbate and sodium benzoate is 1:1-3:1.
4. a kind of degradable non-phosphorus composite scale inhibitor according to claim 2, which is characterized in that the cyclodextrin is compound steady
Determine the preparation method of agent the following steps are included:
A1, cyclodextrin is added in ethyl acetate, stirring to cyclodextrin is completely dissolved；
A2, stabilizer is added in the solution of A1 preparation, is heated to 40-45 DEG C, 400-500r/min is stirred 6 hours；
A3, the step A2 solution prepared is cooled to room temperature, removes ethyl acetate.
5. a kind of degradable non-phosphorus composite scale inhibitor according to claim 1-3, which is characterized in that the ring paste
Essence is beta-cyclodextrin.
6. a kind of degradable non-phosphorus composite scale inhibitor according to claim 1, which is characterized in that the Sodium Polyacrylate
Molecular weight is 2000-5000.
7. a kind of degradable non-phosphorus composite scale inhibitor according to claim 1, which is characterized in that the lignosulfonates
Molecular weight be 2000-8000.
8. a kind of method for preparing degradable non-phosphorus composite scale inhibitor described in claim 1-7, which is characterized in that including following
Step:
B1, lignosulfonates are added to the water, 400-600r/min, which is stirred to lignosulfonates, to be completely dissolved to obtain wood
Mahogany sulfonate solution；
B2, poly-aspartate, Sodium Polyacrylate and cyclodextrin compound stabilizer are uniformly mixed, prepare mixed liquor；
B3, the mixed liquor of B2 preparation is added in the lignosulfonate solutions of step B1 preparation, is uniformly mixed.
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