CN111690383A - Anti-freezing mother liquor with good stability and preparation method thereof - Google Patents
Anti-freezing mother liquor with good stability and preparation method thereof Download PDFInfo
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- CN111690383A CN111690383A CN202010733570.7A CN202010733570A CN111690383A CN 111690383 A CN111690383 A CN 111690383A CN 202010733570 A CN202010733570 A CN 202010733570A CN 111690383 A CN111690383 A CN 111690383A
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- stirring
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- ultrapure water
- reaction kettle
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- 239000012452 mother liquor Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000007710 freezing Methods 0.000 title claims description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000003756 stirring Methods 0.000 claims abstract description 62
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 50
- 239000012498 ultrapure water Substances 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 238000005260 corrosion Methods 0.000 claims abstract description 32
- 230000007797 corrosion Effects 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000008213 purified water Substances 0.000 claims abstract description 18
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 11
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000012964 benzotriazole Substances 0.000 claims abstract description 11
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims abstract description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 11
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 11
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 11
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 238000011033 desalting Methods 0.000 claims abstract description 6
- 238000004821 distillation Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 6
- 230000001954 sterilising effect Effects 0.000 claims abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 23
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- 239000003112 inhibitor Substances 0.000 claims description 15
- 239000011259 mixed solution Substances 0.000 claims description 15
- 159000000000 sodium salts Chemical class 0.000 claims description 15
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000006260 foam Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000002528 anti-freeze Effects 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 230000008034 disappearance Effects 0.000 claims description 5
- 238000005187 foaming Methods 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 238000009835 boiling Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010413 mother solution Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
Abstract
The invention discloses an antifreezing mother liquor with good stability and a preparation method thereof, comprising the steps of taking purified water, carrying out ultraviolet sterilization on the purified water, carrying out reverse osmosis filtration treatment, then sending the purified water into an electric desalting device for treatment to obtain desalted water, and carrying out distillation treatment on the desalted water to obtain ultrapure water; adding the obtained ultrapure water into a reaction kettle, adding ethylene glycol into the ultrapure water, stirring the ultrapure water at a high speed through the reaction kettle at the temperature of 60-75 ℃ during stirring, and stopping stirring for 10-30 min; heating the mixture at a low temperature of 35-45 ℃, adding sodium benzoate, disodium hydrogen phosphate, benzotriazole, triethanolamine and hydrolyzed maleic anhydride into the mixture in turn, and stirring the solvent added later at a high speed through a reaction kettle, wherein the stirring speed is 650 plus 900r/min for the second time. The novel metal corrosion-resistant heat dissipation plate has the advantages of being high in corrosion resistance, good in heat dissipation effect and high in stability, better solving the problems of metal corrosion and storage precipitation layering, not prone to scaling in use, and high in use stability.
Description
Technical Field
The invention belongs to the technical field of antifreeze, and particularly relates to an antifreeze mother solution with good stability and a preparation method thereof.
Background
The boiling point and the freezing point value of the existing antifreeze are relatively close, the antifreeze is not beneficial to being used in a dual extreme temperature environment, the application range is low, the foam volume is large, the heat transfer efficiency is general, the heat dissipation performance is poor, the stability is low, the problem of precipitation and delamination can occur during storage, the use stability is low, and scaling is easy to generate.
Disclosure of Invention
The invention aims to provide an antifreezing mother solution with good stability and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an antifreezing mother liquor with good stability and a preparation method thereof comprise the following materials in parts by weight: 15-30 parts of ultrapure water, 42-65 parts of ethylene glycol, 1-2 parts of sodium benzoate, 0.5-2 parts of disodium hydrogen phosphate, 0.06-0.1 part of benzotriazole, 0.05-0.25 part of triethanolamine, 0.01-0.03 part of phosphoric acid, 0.5-1 part of defoaming agent, 0.01-0.2 part of hydrolyzed maleic anhydride, 0.01-0.02 part of sodium salt thereof, 0.05-0.1 part of dye and 0.8-3.5 parts of organic corrosion inhibitor;
the preparation method comprises the following steps:
the method comprises the following steps: taking purified water, carrying out ultraviolet sterilization on the purified water, carrying out reverse osmosis filtration treatment, then sending the purified water into an electric desalting device for treatment to obtain desalted water, and carrying out distillation treatment on the desalted water to obtain ultrapure water;
step two: adding the ultrapure water obtained in the step two into a reaction kettle, adding ethylene glycol into the ultrapure water, stirring the ultrapure water at a high speed through the reaction kettle at the temperature of 60-75 ℃ during stirring, and stopping stirring for 10-30 min;
step three: after the ethylene glycol and the ultrapure water in the step two are fully stirred and mixed, heating the ethylene glycol and the ultrapure water at the low temperature of 35-45 ℃, sequentially adding sodium benzoate, disodium hydrogen phosphate, benzotriazole, triethanolamine and hydrolyzed maleic anhydride into the ethylene glycol and the ultrapure water, stirring the solvent added later at a high speed through a reaction kettle, and stirring for the second time at the speed of 650 plus 900r/min to obtain a mixed solution;
step four: mixing and stirring the sodium salt, the organic corrosion inhibitor and the dye, pouring the sodium salt, the organic corrosion inhibitor and the dye into a reaction kettle in sequence during stirring, mixing at the speed of 800-;
step five: taking the mixed solution obtained in the third step out of the reaction kettle, naturally cooling the mixed solution, adding the additive obtained in the fourth step after cooling to room temperature, and uniformly mixing to obtain an antifreezing mother liquor material;
step six: and D, adding a defoaming agent into the antifreezing mother liquor obtained in the step five, and stirring and defoaming the antifreezing mother liquor for 20-40min through a reaction kettle to obtain an antifreezing mother liquor finished product.
Further, the reaction kettle in the second step is stirred and mixed uniformly at the speed of 850-.
Further, the time of the second stirring in the third step is 50-360min, and phosphoric acid is added in the 30min operation in the stirring process.
And further, detecting the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the reserve alkalinity reaches 16-17ml, the foaming volume is less than 19-19.5ml, and the foam disappearance time is less than 1.2s, thus the product is qualified.
And further, carrying out a corrosion degree test on the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the product is qualified when the corrosion resistance reaches 1000 hours.
Further, the step five mixing treatment is carried out for 30-40min at the rotating speed of 500-700 r/min.
Compared with the prior art, the invention has the beneficial effects that: the foam heat dissipation device has the advantages of being high in boiling point and low in freezing point, capable of being used in an environment of 40 degrees below zero, suitable for most regions in China, small in foam size, high in heat transfer efficiency, capable of being used under a hot condition, free of peculiar smell, high in corrosion resistance, good in heat dissipation effect and high in stability, well solving the problems of metal corrosion and storage sediment layering, not prone to scaling in use, and high in use stability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An antifreezing mother liquor with good stability and a preparation method thereof comprise the following materials in parts by weight: 15 parts of ultrapure water, 42 parts of ethylene glycol, 1 part of sodium benzoate, 0.5 part of disodium hydrogen phosphate, 0.06 part of benzotriazole, 0.05 part of triethanolamine, 0.01 part of phosphoric acid, 0.5 part of defoaming agent, 0.01 part of hydrolyzed maleic anhydride, 0.01 part of sodium salt thereof, 0.05 part of dye and 0.8 part of organic corrosion inhibitor;
the preparation method comprises the following steps:
the method comprises the following steps: taking purified water, carrying out ultraviolet sterilization on the purified water, carrying out reverse osmosis filtration treatment, then sending the purified water into an electric desalting device for treatment to obtain desalted water, and carrying out distillation treatment on the desalted water to obtain ultrapure water;
step two: adding the ultrapure water obtained in the step two into a reaction kettle, adding ethylene glycol into the ultrapure water, stirring the ultrapure water at a high speed through the reaction kettle, stirring the ultrapure water at the temperature of 60 ℃ during stirring, and stirring the ultrapure water for 10min and then stopping stirring;
step three: after the ethylene glycol and the ultrapure water in the step two are fully stirred and mixed, heating the ethylene glycol and the ultrapure water at a low temperature of 35 ℃, sequentially adding sodium benzoate, disodium hydrogen phosphate, benzotriazole, triethanolamine and hydrolyzed maleic anhydride into the ethylene glycol and the ultrapure water, stirring the solvent added later at a high speed through a reaction kettle, and stirring the solvent at a speed of 650r/min for the second time to obtain a mixed solution;
step four: mixing and stirring sodium salt, an organic corrosion inhibitor and a dye, pouring the sodium salt, the organic corrosion inhibitor and the dye into a reaction kettle in sequence during stirring, mixing at the speed of 800r/min for 20min, and taking out to obtain an additive;
step five: taking the mixed solution obtained in the third step out of the reaction kettle, naturally cooling the mixed solution, adding the additive obtained in the fourth step after cooling to room temperature, and uniformly mixing to obtain an antifreezing mother liquor material;
step six: and D, adding a defoaming agent into the antifreezing mother liquor obtained in the step five, and stirring and defoaming for 20min through a reaction kettle to obtain an antifreezing mother liquor finished product.
And stirring and uniformly mixing the reaction kettle in the second step at the speed of 850 r/min.
Wherein, the time of the second stirring in the third step is 50min, and phosphoric acid is added in the 30min operation in the stirring process.
And C, detecting the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the reserve alkalinity reaches 16ml, the foaming volume is less than 19ml, and the foam disappearance time is less than 1.2s, so that the product is qualified.
And C, performing corrosion degree test on the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the product is qualified when the corrosion resistance reaches 1000 h.
Wherein the mixing treatment of the fifth step is carried out for 30min at the rotating speed of 500 r/min.
Example 2
An antifreezing mother liquor with good stability and a preparation method thereof comprise the following materials in parts by weight: 25 parts of ultrapure water, 52 parts of ethylene glycol, 1.5 parts of sodium benzoate, 1 part of disodium hydrogen phosphate, 0.08 part of benzotriazole, 0.1 part of triethanolamine, 0.02 part of phosphoric acid, 0.7 part of defoaming agent, 0.05 part of hydrolyzed maleic anhydride, 0.01 part of sodium salt thereof, 0.07 part of dye and 2 parts of organic corrosion inhibitor;
the preparation method comprises the following steps:
the method comprises the following steps: taking purified water, carrying out ultraviolet sterilization on the purified water, carrying out reverse osmosis filtration treatment, then sending the purified water into an electric desalting device for treatment to obtain desalted water, and carrying out distillation treatment on the desalted water to obtain ultrapure water;
step two: adding the ultrapure water obtained in the step two into a reaction kettle, adding ethylene glycol into the ultrapure water, stirring the ultrapure water at a high speed through the reaction kettle, stirring the ultrapure water at a temperature of 68 ℃ during stirring, and stopping stirring the ultrapure water for 20 min;
step three: after the ethylene glycol and the ultrapure water in the step two are fully stirred and mixed, heating the ethylene glycol and the ultrapure water at a low temperature of 40 ℃, sequentially adding sodium benzoate, disodium hydrogen phosphate, benzotriazole, triethanolamine and hydrolyzed maleic anhydride into the ethylene glycol and the ultrapure water, stirring the solvent added later at a high speed through a reaction kettle, and stirring the solvent at a speed of 800r/min for the second time to obtain a mixed solution;
step four: mixing and stirring sodium salt, an organic corrosion inhibitor and a dye, pouring the sodium salt, the organic corrosion inhibitor and the dye into a reaction kettle in sequence during stirring, mixing at a speed of 1050r/min for 35min, and taking out to obtain an additive;
step five: taking the mixed solution obtained in the third step out of the reaction kettle, naturally cooling the mixed solution, adding the additive obtained in the fourth step after cooling to room temperature, and uniformly mixing to obtain an antifreezing mother liquor material;
step six: and D, adding a defoaming agent into the antifreezing mother liquor obtained in the step five, and stirring and defoaming the antifreezing mother liquor for 30min through a reaction kettle to obtain an antifreezing mother liquor finished product.
And stirring and uniformly mixing the reaction kettle in the second step at a speed of 1050 r/min.
Wherein, the time of the second stirring in the third step is 150min, and phosphoric acid is added in the 30min operation in the stirring process.
And C, detecting the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the reserve alkalinity reaches 16.5ml, the foaming volume is less than 19.3ml, and the foam disappearance time is less than 1.2s, so that the product is qualified.
And C, performing corrosion degree test on the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the product is qualified when the corrosion resistance reaches 1000 h.
Wherein the mixing treatment of the fifth step is carried out for 35min at the rotating speed of 600 r/min.
Example 3
An antifreezing mother liquor with good stability and a preparation method thereof comprise the following materials in parts by weight: 30 parts of ultrapure water, 65 parts of ethylene glycol, 2 parts of sodium benzoate, 2 parts of disodium hydrogen phosphate, 0.1 part of benzotriazole, 0.25 part of triethanolamine, 0.03 part of phosphoric acid, 1 part of defoaming agent, 0.2 part of hydrolyzed maleic anhydride, 0.02 part of sodium salt, 0.1 part of dye and 3.5 parts of organic corrosion inhibitor;
the preparation method comprises the following steps:
the method comprises the following steps: taking purified water, carrying out ultraviolet sterilization on the purified water, carrying out reverse osmosis filtration treatment, then sending the purified water into an electric desalting device for treatment to obtain desalted water, and carrying out distillation treatment on the desalted water to obtain ultrapure water;
step two: adding the ultrapure water obtained in the step two into a reaction kettle, adding ethylene glycol into the ultrapure water, stirring the ultrapure water at a high speed through the reaction kettle, stirring the ultrapure water at the temperature of 75 ℃ during stirring, and stopping stirring the ultrapure water for 30 min;
step three: after the ethylene glycol and the ultrapure water in the step two are fully stirred and mixed, heating the ethylene glycol and the ultrapure water at a low temperature of 45 ℃, sequentially adding sodium benzoate, disodium hydrogen phosphate, benzotriazole, triethanolamine and hydrolyzed maleic anhydride into the ethylene glycol and the ultrapure water, stirring the solvent added later at a high speed through a reaction kettle, and stirring the solvent at a speed of 900r/min for the second time to obtain a mixed solution;
step four: mixing and stirring sodium salt, an organic corrosion inhibitor and a dye, pouring the sodium salt, the organic corrosion inhibitor and the dye into a reaction kettle in sequence during stirring, mixing at the speed of 1200r/min for 50min, and taking out to obtain an additive;
step five: taking the mixed solution obtained in the third step out of the reaction kettle, naturally cooling the mixed solution, adding the additive obtained in the fourth step after cooling to room temperature, and uniformly mixing to obtain an antifreezing mother liquor material;
step six: and D, adding a defoaming agent into the antifreezing mother liquor obtained in the step five, and stirring and defoaming the antifreezing mother liquor for 40min through a reaction kettle to obtain an antifreezing mother liquor finished product.
And stirring and uniformly mixing the reaction kettle in the second step at the speed of 1200 r/min.
Wherein, the time of the second stirring in the third step is 360min, and phosphoric acid is added in the 30min operation in the stirring process.
And C, detecting the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the reserve alkalinity reaches 17ml, the foaming volume is less than 19.5ml, and the foam disappearance time is less than 1.2s, so that the product is qualified.
And C, performing corrosion degree test on the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the product is qualified when the corrosion resistance reaches 1000 h.
Wherein, the mixing treatment of the fifth step is carried out for 40min at the rotating speed of 700 r/min.
The working principle of the invention is as follows: the foam heat dissipation device has the advantages of being high in boiling point and low in freezing point, capable of being used in an environment of 40 degrees below zero, suitable for most regions in China, small in foam size, high in heat transfer efficiency, capable of being used under a hot condition, free of peculiar smell, high in corrosion resistance, good in heat dissipation effect and high in stability, well solving the problems of metal corrosion and storage sediment layering, not prone to scaling in use, and high in use stability.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The anti-freezing mother liquor with good stability and the preparation method thereof are characterized by comprising the following materials in parts by weight: 15-30 parts of ultrapure water, 42-65 parts of ethylene glycol, 1-2 parts of sodium benzoate, 0.5-2 parts of disodium hydrogen phosphate, 0.06-0.1 part of benzotriazole, 0.05-0.25 part of triethanolamine, 0.01-0.03 part of phosphoric acid, 0.5-1 part of defoaming agent, 0.01-0.2 part of hydrolyzed maleic anhydride, 0.01-0.02 part of sodium salt thereof, 0.05-0.1 part of dye and 0.8-3.5 parts of organic corrosion inhibitor;
the preparation method comprises the following steps:
the method comprises the following steps: taking purified water, carrying out ultraviolet sterilization on the purified water, carrying out reverse osmosis filtration treatment, then sending the purified water into an electric desalting device for treatment to obtain desalted water, and carrying out distillation treatment on the desalted water to obtain ultrapure water;
step two: adding the ultrapure water obtained in the step two into a reaction kettle, adding ethylene glycol into the ultrapure water, stirring the ultrapure water at a high speed through the reaction kettle at the temperature of 60-75 ℃ during stirring, and stopping stirring for 10-30 min;
step three: after the ethylene glycol and the ultrapure water in the step two are fully stirred and mixed, heating the ethylene glycol and the ultrapure water at the low temperature of 35-45 ℃, sequentially adding sodium benzoate, disodium hydrogen phosphate, benzotriazole, triethanolamine and hydrolyzed maleic anhydride into the ethylene glycol and the ultrapure water, stirring the solvent added later at a high speed through a reaction kettle, and stirring for the second time at the speed of 650 plus 900r/min to obtain a mixed solution;
step four: mixing and stirring the sodium salt, the organic corrosion inhibitor and the dye, pouring the sodium salt, the organic corrosion inhibitor and the dye into a reaction kettle in sequence during stirring, mixing at the speed of 800-;
step five: taking the mixed solution obtained in the third step out of the reaction kettle, naturally cooling the mixed solution, adding the additive obtained in the fourth step after cooling to room temperature, and uniformly mixing to obtain an antifreezing mother liquor material;
step six: and D, adding a defoaming agent into the antifreezing mother liquor obtained in the step five, and stirring and defoaming the antifreezing mother liquor for 20-40min through a reaction kettle to obtain an antifreezing mother liquor finished product.
2. The antifreeze mother liquor with good stability and the preparation method thereof as claimed in claim 1, is characterized in that: and in the second step, the reaction kettle is stirred and mixed uniformly at the speed of 850-.
3. The antifreeze mother liquor with good stability and the preparation method thereof as claimed in claim 1, is characterized in that: the time of the second stirring in the third step is 50-360min, and phosphoric acid is added in the 30min operation in the stirring process.
4. The antifreeze mother liquor with good stability and the preparation method thereof as claimed in claim 1, is characterized in that: and detecting the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the reserve alkalinity reaches 16-17ml, the foaming volume is less than 19-19.5ml, and the foam disappearance time is less than 1.2s, thus the product is qualified.
5. The antifreeze mother liquor with good stability and the preparation method thereof as claimed in claim 1, is characterized in that: and carrying out corrosion degree test on the finished product of the anti-freezing mother liquor obtained in the sixth step, wherein the corrosion resistance is up to 1000h, and the product is qualified.
6. The antifreeze mother liquor with good stability and the preparation method thereof as claimed in claim 1, is characterized in that: the mixing treatment in the fifth step is carried out for 30-40min at the rotating speed of 500-700 r/min.
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