CN115418202A - Low-conductivity cooling liquid and preparation method thereof - Google Patents
Low-conductivity cooling liquid and preparation method thereof Download PDFInfo
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- CN115418202A CN115418202A CN202211152686.7A CN202211152686A CN115418202A CN 115418202 A CN115418202 A CN 115418202A CN 202211152686 A CN202211152686 A CN 202211152686A CN 115418202 A CN115418202 A CN 115418202A
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- 239000000110 cooling liquid Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 87
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 27
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 13
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 13
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 12
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 11
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 11
- 239000002243 precursor Substances 0.000 claims abstract description 11
- 150000002500 ions Chemical class 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000084 colloidal system Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- 239000012046 mixed solvent Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- LYCAIKOWRPUZTN-NMQOAUCRSA-N 1,2-dideuteriooxyethane Chemical compound [2H]OCCO[2H] LYCAIKOWRPUZTN-NMQOAUCRSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 150000001805 chlorine compounds Chemical class 0.000 claims 1
- 150000002823 nitrates Chemical class 0.000 claims 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 15
- 239000003112 inhibitor Substances 0.000 abstract description 8
- 150000001450 anions Chemical class 0.000 abstract description 5
- 150000001768 cations Chemical class 0.000 abstract description 4
- 230000003446 memory effect Effects 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 9
- 229910020068 MgAl Inorganic materials 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000010949 copper Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000012065 filter cake Substances 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 229920013639 polyalphaolefin Polymers 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- PCLIMKBDDGJMGD-UHFFFAOYSA-N N-bromosuccinimide Chemical compound BrN1C(=O)CCC1=O PCLIMKBDDGJMGD-UHFFFAOYSA-N 0.000 description 2
- ISAKRJDGNUQOIC-UHFFFAOYSA-N Uracil Chemical compound O=C1C=CNC(=O)N1 ISAKRJDGNUQOIC-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 heterocyclic nitrogen-containing compound Chemical class 0.000 description 2
- 238000005040 ion trap Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- HLLOAHWFPRCYJY-UHFFFAOYSA-N 2h-benzotriazole;octadecan-1-amine Chemical compound C1=CC=CC2=NNN=C21.CCCCCCCCCCCCCCCCCCN HLLOAHWFPRCYJY-UHFFFAOYSA-N 0.000 description 1
- 239000005725 8-Hydroxyquinoline Substances 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- UGQMRVRMYYASKQ-KQYNXXCUSA-N Inosine Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1N1C2=NC=NC(O)=C2N=C1 UGQMRVRMYYASKQ-KQYNXXCUSA-N 0.000 description 1
- 229930010555 Inosine Natural products 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229930013930 alkaloid Natural products 0.000 description 1
- 150000003797 alkaloid derivatives Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 150000003851 azoles Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229960003786 inosine Drugs 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229940035893 uracil Drugs 0.000 description 1
Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/12—Oxygen-containing compounds
- C23F11/122—Alcohols; Aldehydes; Ketones
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a low-conductivity cooling liquid and a preparation method thereof, which are characterized in that by means of the structure memory effect of a composite metal oxide, the characteristics that the composite metal oxide can capture cations and anions simultaneously in the process of converting the composite metal oxide into a hydrotalcite precursor are utilized, and the concentrations of free cations and anions in the cooling liquid are effectively reduced, so that the conductivity of the cooling liquid is reduced, and the working safety of the cooling liquid is improved. The cooling liquid comprises, by mass, 20-79% of ethylene glycol, 20-79% of deionized water and 1-5% of an ion capturing agent. The cooling liquid has the advantages of low conductivity, long service life, simple preparation method, low cost, easy industrial production and the like, and solves the problems of poor stability, short service life and high cost of the cooling liquid added with an organic corrosion inhibitor.
Description
Technical Field
The invention relates to the technical field of cooling liquid, in particular to low-conductivity cooling liquid and a preparation method thereof.
Background
The cooling liquid is an indispensable cooling and heat-dissipating medium of a cooling system, has the functions of cooling, corrosion prevention, scale prevention, freezing prevention and the like, and consists of water, a freezing-proof agent and various additives (mainly comprising a corrosion inhibitor and secondarily comprising a buffering agent, a scale prevention agent, a defoaming agent and a coloring agent). The research on the cooling liquid is born in 30 years, enters China in 70 years, and has been 80 years old up to now. The commonly used cooling liquid mainly comprises water, alcohols (ethylene glycol aqueous solution, propylene glycol aqueous solution), polyalphaolefin (PAO), silicates, mineral oils and fluorocarbons, wherein water is the most common and very efficient cooling medium, and is widely applied in the industrial and living fields, but cannot meet the environmental adaptability requirement of military radars due to factors such as corrosivity, freezing point and the like. And the PAO belongs to grease, is insoluble in water, can be combusted when meeting open fire, and has poor safety. The glycol aqueous solution is the cooling liquid with the widest application range due to low freezing point, low corrosivity, higher specific heat capacity and good fluidity, but due to the conductive characteristic of the glycol aqueous solution, under the condition that the cooling liquid leaks due to long-term operation, phenomena such as circuit short circuit, corrosion and the like are easy to occur, so that potential safety hazards are caused, and therefore, the reduction of the conductivity of the cooling liquid is very important for improving the reliability and the safety of the cooling liquid.
In order to reduce the corrosion performance of the cooling liquid, a heterocyclic nitrogen-containing compound corrosion inhibitor is usually required to be added into the cooling liquid, and document CN108102616A discloses a preparation method of a low-conductivity cooling liquid with 8-hydroxyquinoline, uracil, 4-acetaminophenol, benzotriazole octadecylamine, N-bromosuccinimide and inosine as main additives, wherein the conductivity can reach 0.08 mu S/cm; the document CN102174313B discloses a preparation method of a low-conductivity cooling liquid with natural alkaloid, heterocyclic alkane and azole compounds as main additives, wherein the conductivity can reach 5 mu S/cm. The added organic nitrogen-containing compound can form a chelate on the surface of the metal to prevent the metal from further corroding so as to reduce the conductivity of the cooling liquid. Document CN109065912a reports a coolant added with a novel nonionic corrosion inhibitor, which can reduce the conductivity of the coolant, has good corrosion inhibition capability on iron and aluminum-based metals, and has a good cooling effect. However, the organic corrosion inhibitors have the defects of complex preparation conditions, high price, poor stability and the like, so that the problems of poor stability, short service life, high cost and the like of the cooling liquid added with the organic corrosion inhibitor are caused, and the application of the organic corrosion inhibitors in the cooling liquid is limited. Therefore, there is a need to develop a novel cooling liquid preparation technology with high stability and low cost.
In recent years, hydrotalcite-like anionic layered functional inorganic materials with layered structures have widely attracted attention because of their adjustable chemical compositions and unique structures and properties. The calcined product, namely the layered double metal oxide LDO, has higher specific surface area than a hydrotalcite precursor LDH and unique 'structure memory effect'. The sample is added into a solution medium containing certain anions, and the structure of the sample can be partially restored to a hydrotalcite structure with an ordered layered structure. In the recovery process, the ion trap has extremely strong active competition capability for ions, and can trap positive ions to the laminated plate and negative ions to the interlayer, so that an ion trap is formed, and the conductivity of the cooling liquid is effectively reduced. Therefore, the research has very important significance for preparing the low-conductivity cooling liquid.
Disclosure of Invention
The invention aims to provide a low-conductivity cooling liquid and a preparation method thereof, wherein the cooling liquid has low conductivity, still has long-term insulating property even if accidentally leaked, and cannot influence the normal operation of equipment.
On one hand, the invention provides a low-conductivity cooling liquid which comprises the following components in percentage by mass: 20-79% of ethylene glycol, 20-79% of deionized water and 1-5% of ion capturing agent;
the chemical general formula of the ion trapping agent is as follows:
M 2+ 1-x M 3+ x O 1+x/2 ·nEG
wherein EG is ethylene glycol, x is more than or equal to 0.2 and less than or equal to 0.33,0.5 and less than or equal to 2; m 2+ Is Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ 、Fe 2+ Or Cu 2+ Either one or both of; m 3+ Is Al 3+ 、Co 3+ 、Ti 3+ 、Fe 3+ Or Cr 3+ Any one of them.
Preferably, M 2+ Is Mg 2+ 、Zn 2+ Or Ca 2+ Either one or two of (B) M 3+ Is Al 3+ 。
On the other hand, the invention provides a preparation method of the cooling liquid with low conductivity, which comprises the following specific steps:
A. will M 2+ 、M 3+ The soluble salt and urea are dissolved in a mixed solvent to prepare a mixed solution, wherein M is 3+ The molar concentration of (A) is 0.02-0.5 mol/L, M 2+ And M 3+ In a molar ratio of 2 to 4, urea to M 3+ The molar ratio of (2) to (12), then placing the mixture into a reaction kettle, heating the mixture to 90-150 ℃, reacting for 2-12 hours, filtering and washing the precipitate to be neutral after the reaction is finished, and drying the obtained wet filter cake at 80-120 ℃ for 6-12 hours to obtain a hydrotalcite precursor;
B. placing the hydrotalcite precursor prepared in the step A into a muffle furnace, heating to 450-600 ℃ at a heating rate of 2-10 ℃/min in the air atmosphere, and preserving heat for 2-6 h to obtain the composite metal oxide M 2+ 1-x M 3+ x O 1+x/2 Wherein x is more than or equal to 0.2 and less than or equal to 0.33;
C. adding the composite metal oxide obtained in the step B into ethylene glycol, grinding for 5-20 min by using a colloid mill to obtain slurry with the solid content of 15-30%, heating the slurry to 90-150 ℃, and reacting for 2-6 h to obtain the composite metal oxide M modified by the ethylene glycol 2+ 1-x M 3+ x O 1+x/2 nEG (where 0.5. Ltoreq. N.ltoreq.2); adding deionized water and ethylene glycol into the slurry, and grinding for 5-20 min by using a colloid mill to obtain ethylene glycol/water type cooling liquid, wherein the mass percentage of the ethylene glycol modified composite metal oxide in the cooling liquid is 1-5%, the mass percentage of the ethylene glycol is 20-79%, and the mass percentage of the deionized water is 20-79%.
Preferably, M 2+ The soluble salt of (A) is Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ 、Fe 2+ 、Cu 2+ Nitrate, sulfate or chloride; m is a group of 3+ The soluble salt of (A) is Al 3+ 、Co 3+ 、Ti 3+ 、Fe 3+ 、Cr 3+ Nitrate, sulfate or chloride.
Preferably, M 2+ The soluble salt of (A) is Mg 2+ 、Zn 2+ Or Ca 2+ Either one or both of; m is a group of 3+ The soluble salt of (A) is Al 3+ Nitrate, sulfate or chloride.
Preferably, the mixed solvent is a mixture of deionized water and ethanol, ethylene glycol or glycerol.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a composite metal oxide M modified by ethylene glycol 2+ 1-x M 3+ x O 1+x/2 nEG is an ion trapping agent, which by virtue of its structure memory effect, can realize the simultaneous efficient trapping of anions and cations in the cooling liquid in the process of recovering the hydrotalcite precursor layered structure, and greatly reduce the free anions and cations in the cooling liquid, thereby significantly reducing the conductivity of the cooling liquid, with the conductivity of the cooling liquid being 0.1-1 μ S/cm. The glycol modified composite metal oxide has the characteristics of large adsorption capacity, high stability, convenient synthesis and the like, so that the prepared cooling liquid has the advantages of low conductivity, long service life, simple preparation method, low cost, easy industrial production and the like, and the problems of poor stability, short service life and high cost of the cooling liquid added with an organic corrosion inhibitor are solved.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following detailed description will be given for clear and complete description of the technical solution of the present invention.
Example 1
The preparation method of the low-conductivity coolant ion capture agent in the embodiment comprises the following steps:
A. 59.5g of Zn (NO) 3 ) 2 ·6H 2 O，37.5g Al(NO 3 ) 3 ·9H 2 Dissolving 42.0g of urea in 600mL of a mixed solvent of deionized water and ethylene glycol in a volume ratio of 1:1 to obtain a mixed solution; transferring the solution into a reaction kettle, heating to 90 ℃, reacting at constant temperature for 8h, filtering and washing the obtained precipitate to be neutral after the reaction is finished, and then drying the filter cake in a 90 ℃ drying oven for 8h to obtain a ZnAl hydrotalcite precursor;
B. putting the obtained ZnAl hydrotalcite precursor into a muffle furnace, heating to 500 ℃ at the heating rate of 5 ℃/min, preserving the temperature for 3h, and cooling to obtain ZnAl composite metal oxide;
C. weighing 5g of ZnAl composite metal oxide, adding the ZnAl composite metal oxide into 20g of ethylene glycol, grinding the ZnAl composite metal oxide by using a colloid mill for 8min to obtain slurry, heating the slurry to 100 ℃, reacting for 4h to obtain slurry containing glycol modified ZnAl composite metal oxide, then adding 75g of ethylene glycol and 100g of deionized water, and grinding the mixture by using the colloid mill for 5min again to obtain ethylene glycol/water type cooling liquid containing ZnAl composite metal oxide, wherein the conductivity of the cooling liquid is 0.81 mu S/cm, and the mass percentage content of the ZnAl composite metal oxide is 2.5%.
The coolant has excellent corrosion resistance, and brass, red copper, aluminum alloy sheets and stainless steel sheets are immersed in the coolant, and after being immersed for 7 days at 80 ℃, the weight change is measured, and the results are shown in table 1.
Example 2
A. 76.9g of Mg (NO) 3 ) 2 ·6H 2 O，37.5g Al(NO 3 ) 3 ·9H 2 Dissolving 45.0g of urea in 600mL of mixed solvent of deionized water and ethylene glycol in a volume ratio of 2:1 to obtain mixed solution; mixing the solutionTransferring the mixture into a reaction kettle, heating the mixture to 120 ℃, reacting the mixture for 6 hours at constant temperature, filtering and washing the obtained precipitate to be neutral after the reaction is finished, and then drying a filter cake in a drying oven at 100 ℃ for 8 hours to obtain a MgAl hydrotalcite precursor;
B. placing the obtained MgAl hydrotalcite precursor in a muffle furnace, heating to 550 ℃ at the heating rate of 10 ℃/min, preserving heat for 4h, and cooling to obtain MgAl composite metal oxide;
C. weighing 10g of MgAl composite metal oxide, adding the MgAl composite metal oxide into 30g of glycol, grinding the mixture for 10min by using a colloid mill to obtain slurry, heating the slurry to 120 ℃, reacting for 3h to obtain slurry containing glycol modified MgAl composite metal oxide, then adding 170g of glycol and 290g of deionized water, and grinding the mixture for 6min by using the colloid mill again to obtain glycol/water type cooling liquid containing the MgAl composite metal oxide, wherein the conductivity of the cooling liquid is 0.79 mu S/cm, and the mass percentage content of the MgAl composite metal oxide is 2%.
The coolant has excellent corrosion resistance, and brass, red copper, aluminum alloy sheets and stainless steel sheets are immersed in the coolant, and after being immersed for 7 days at 80 ℃, the weight change is measured, and the results are shown in table 1.
Comparative example:
the corrosion test of metals was carried out using a commercially available glycol/water type coolant as a control. Brass, red copper, aluminum alloy sheet, and stainless steel sheet were immersed in a commercially available cooling liquid at 80 ℃ for 7 days, and then the weight change was measured, and the results are shown in table 1.
Table 1 results of cooling liquid experiments of examples 1 and 2 and comparative examples
As can be seen from Table 1, the cooling fluid provided by the embodiment of the present invention has an electrical conductivity of about 0.8 μ S/cm, which is much less than 5 μ S/cm, and can be used in a liquid cooling system requiring a relatively high electrical conductivity. The cooling liquid can effectively relieve the metal corrosion condition, prolong the service time of the cooling liquid and ensure the safe work of a machine.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. The low-conductivity cooling liquid is characterized by comprising the following components in percentage by mass: 20-79% of ethylene glycol, 20-79% of deionized water and 1-5% of ion capturing agent;
the chemical general formula of the ion trapping agent is as follows:
M 2+ 1-x M 3+ x O 1+x/2 ·nEG
wherein EG is ethylene glycol, x is more than or equal to 0.2 and less than or equal to 0.33,0.5 and less than or equal to 2; m 2+ Is Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ 、Fe 2+ Or Cu 2+ Either one or both of; m 3+ Is Al 3+ 、Co 3+ 、Ti 3+ 、Fe 3+ Or Cr 3+ Any one of them.
2. The low conductivity coolant of claim 1, wherein M is 2+ Is Mg 2+ 、Zn 2+ Or Ca 2+ Either one or two of them, M 3+ Is Al 3+ 。
3. A method for preparing a low-conductivity cooling liquid as claimed in claim 1 or 2, comprising the following steps:
A. will M 2+ 、M 3+ The soluble salt and urea are dissolved in a mixed solvent to prepare a mixed solution, wherein M is 3+ The molar concentration of (A) is 0.02-0.5 mol/L, M 2+ And M 3+ In a molar ratio of 2 to 4, urea to M 3+ The molar ratio of (1) is 6-12, then placing the mixture into a reaction kettle, heating the mixture to 90-150 ℃, reacting for 2-12 h, filtering and washing a precipitate to be neutral after the reaction is finished, and obtaining a wet filter cakeDrying for 6-12 h at 80-120 ℃ to obtain a hydrotalcite precursor;
B. placing the hydrotalcite precursor prepared in the step A into a muffle furnace, heating to 450-600 ℃ at the heating rate of 2-10 ℃/min in the air atmosphere, and preserving the temperature for 2-6 h to obtain the composite metal oxide M 2+ 1-x M 3+ x O 1+x/2 Wherein x is more than or equal to 0.2 and less than or equal to 0.33;
C. adding the composite metal oxide obtained in the step B into ethylene glycol, grinding for 5-20 min by using a colloid mill to obtain slurry with the solid content of 15-30%, heating the slurry to 90-150 ℃, and reacting for 2-6 h to obtain the composite metal oxide M modified by the ethylene glycol 2+ 1-x M 3+ x O 1+x/2 nEG (where 0.5. Ltoreq. N.ltoreq.2); adding deionized water and ethylene glycol into the slurry, and grinding for 5-20 min by using a colloid mill to obtain ethylene glycol/water type cooling liquid, wherein the mass percentage of the ethylene glycol modified composite metal oxide in the cooling liquid is 1-5%, the mass percentage of the ethylene glycol is 20-79%, and the mass percentage of the deionized water is 20-79%.
4. The method of claim 3, wherein M is the same as M 2+ The soluble salt of (A) is Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ 、Fe 2+ 、Cu 2+ Nitrate, sulfate or chloride of (a); the M is 3+ The soluble salt of (A) is Al 3+ 、Co 3 + 、Ti 3+ 、Fe 3+ 、Cr 3+ Nitrate, sulfate or chloride.
5. The method of claim 4, wherein M is the same as M 2+ The soluble salt of (A) is Mg 2+ 、Zn 2+ Or Ca 2+ Either one or both of; the M is 3+ The soluble salt of (A) is Al 3+ Nitrates, sulfates and chlorides.
6. The method of claim 3, wherein the mixed solvent is a mixture of deionized water and ethanol, ethylene glycol, or glycerol.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405094A (en) * | 2002-11-08 | 2003-03-26 | 浙江大学 | Anionic capture agent and its preparation and using method |
| JP2004143265A (en) * | 2002-10-23 | 2004-05-20 | Toyota Motor Corp | Cooling liquid, method for sealing cooling liquid and cooling system |
| US20040253490A1 (en) * | 2002-01-15 | 2004-12-16 | Christian Wulff | Method and device for deionizing cooling media for fuel cells |
| CN1653250A (en) * | 2002-05-17 | 2005-08-10 | 巴斯福股份公司 | Method and device for cooling an internal combustion engine |
| JP2014185838A (en) * | 2013-03-25 | 2014-10-02 | Toyota Central R&D Labs Inc | Cooling system |
| CN108102616A (en) * | 2017-12-22 | 2018-06-01 | 扬州中德汽车零部件有限公司 | Low conductivity super long effective organic type fuel cell anti-freeze cooling liquid and preparation method thereof |
| CN109621939A (en) * | 2019-01-04 | 2019-04-16 | 北京化工大学 | Ternary composite metal oxide solid base catalyst and its preparation method and application |
| CN111218259A (en) * | 2018-11-27 | 2020-06-02 | 北京蓝星清洗有限公司 | New energy automobile power battery cooling liquid and preparation method thereof |
| CN112226213A (en) * | 2020-11-11 | 2021-01-15 | 北京中航经天润滑科技有限公司 | Low-conductivity dielectric cooling liquid for ethylene glycol type phased array radar and application thereof |
| CN112745809A (en) * | 2021-01-20 | 2021-05-04 | 广东石油化工学院 | Low-conductivity cooling liquid and preparation method thereof |
| CN113652210A (en) * | 2021-06-28 | 2021-11-16 | 中国船舶重工集团公司第七一八研究所 | Low-conductivity long-acting cooling liquid and preparation method thereof |
| WO2022188367A1 (en) * | 2021-03-09 | 2022-09-15 | 中国华能集团清洁能源技术研究院有限公司 | Zn-based ternary hydrotalcite and preparation method therefor and application thereof, and zn-based ternary composite metal oxide and preparation method therefor and application thereof |
-
2022
- 2022-09-21 CN CN202211152686.7A patent/CN115418202A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040253490A1 (en) * | 2002-01-15 | 2004-12-16 | Christian Wulff | Method and device for deionizing cooling media for fuel cells |
| CN1653250A (en) * | 2002-05-17 | 2005-08-10 | 巴斯福股份公司 | Method and device for cooling an internal combustion engine |
| JP2004143265A (en) * | 2002-10-23 | 2004-05-20 | Toyota Motor Corp | Cooling liquid, method for sealing cooling liquid and cooling system |
| CN1405094A (en) * | 2002-11-08 | 2003-03-26 | 浙江大学 | Anionic capture agent and its preparation and using method |
| JP2014185838A (en) * | 2013-03-25 | 2014-10-02 | Toyota Central R&D Labs Inc | Cooling system |
| CN108102616A (en) * | 2017-12-22 | 2018-06-01 | 扬州中德汽车零部件有限公司 | Low conductivity super long effective organic type fuel cell anti-freeze cooling liquid and preparation method thereof |
| CN111218259A (en) * | 2018-11-27 | 2020-06-02 | 北京蓝星清洗有限公司 | New energy automobile power battery cooling liquid and preparation method thereof |
| CN109621939A (en) * | 2019-01-04 | 2019-04-16 | 北京化工大学 | Ternary composite metal oxide solid base catalyst and its preparation method and application |
| CN112226213A (en) * | 2020-11-11 | 2021-01-15 | 北京中航经天润滑科技有限公司 | Low-conductivity dielectric cooling liquid for ethylene glycol type phased array radar and application thereof |
| CN112745809A (en) * | 2021-01-20 | 2021-05-04 | 广东石油化工学院 | Low-conductivity cooling liquid and preparation method thereof |
| WO2022188367A1 (en) * | 2021-03-09 | 2022-09-15 | 中国华能集团清洁能源技术研究院有限公司 | Zn-based ternary hydrotalcite and preparation method therefor and application thereof, and zn-based ternary composite metal oxide and preparation method therefor and application thereof |
| CN113652210A (en) * | 2021-06-28 | 2021-11-16 | 中国船舶重工集团公司第七一八研究所 | Low-conductivity long-acting cooling liquid and preparation method thereof |
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