CN111849601A - Low-temperature antirust agent suitable for fluorine-free refrigeration industry and preparation method and application thereof - Google Patents
Low-temperature antirust agent suitable for fluorine-free refrigeration industry and preparation method and application thereof Download PDFInfo
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- CN111849601A CN111849601A CN202010800346.5A CN202010800346A CN111849601A CN 111849601 A CN111849601 A CN 111849601A CN 202010800346 A CN202010800346 A CN 202010800346A CN 111849601 A CN111849601 A CN 111849601A
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- antirust agent
- fluorine
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- antirust
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- 239000013556 antirust agent Substances 0.000 title claims abstract description 42
- 238000005057 refrigeration Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 8
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims abstract description 30
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 13
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims abstract description 8
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims abstract description 8
- XZOYHFBNQHPJRQ-UHFFFAOYSA-N 7-methyloctanoic acid Chemical compound CC(C)CCCCCC(O)=O XZOYHFBNQHPJRQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229940102253 isopropanolamine Drugs 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 17
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 15
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 8
- 229940043237 diethanolamine Drugs 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 5
- 150000003627 tricarboxylic acid derivatives Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005536 corrosion prevention Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 abstract description 3
- 238000009736 wetting Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 6
- 229910017053 inorganic salt Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
- C10M2207/046—Hydroxy ethers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/127—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids polycarboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/22—Acids obtained from polymerised unsaturated acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention belongs to the technical field of antirust agent preparation, and particularly discloses a low-temperature antirust agent suitable for the fluorine-free refrigeration industry, and a preparation method and application thereof. The low-temperature antirust agent suitable for the fluorine-free refrigeration industry comprises the following raw materials in percentage by mass: 30-40% of water, 10-20% of isopropanolamine, 5-15% of sebacic acid, 5-15% of isononanoic acid, 5-15% of methylbenzotriazole, 5-15% of diethylene glycol, 5-15% of propylene glycol methyl ether and 5-15% of antirust additive. The invention uses diethylene glycol and propylene glycol methyl ether to replace the surface active agent of the traditional antirust agent, and the antirust agent has excellent wetting performance at normal temperature, so that the antirust agent can be completely adhered to the surface of a part at normal temperature to form a compact protective film. The antirust agent can exert excellent antirust performance at lower temperature (normal temperature in summer and autumn and 30-40 ℃ in spring and winter).
Description
Technical Field
The invention belongs to the technical field of antirust agent preparation, and particularly relates to a low-temperature antirust agent suitable for the fluorine-free refrigeration industry, and a preparation method and application thereof.
Background
The traditional water-soluble antirust agent is generally prepared by compounding inorganic salt, a surfactant, an antirust additive, a stabilizer and the like, but in actual use, the traditional water-soluble antirust agent can be heated to more than 60 ℃ to play a good wetting role, so that the corrosion inhibitor is tightly adhered to the surface of a part. Meanwhile, the antirust paint is used at high temperature, so that the volatilization speed of water on the surface of the part after antirust treatment is accelerated, and the rusting risk is reduced. The inorganic salt in the formula cannot be lost along with the volatilization of water, a large amount of inorganic salt remains on the surface of the part, and if the inorganic salt is applied to the fluoride-free refrigeration industry, the energy consumption is high, and the capillary of a refrigeration system after use can be blocked or even scrapped.
Therefore, the aqueous antirust agent which is applicable to the fluorine-free refrigeration industry, can be used at lower temperature (normal temperature in summer and autumn and 30-40 ℃ in spring and winter) and has low residue is urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention mainly aims to provide a low-temperature antirust agent suitable for the fluorine-free refrigeration industry.
The invention also aims to provide a preparation method of the low-temperature antirust agent suitable for the fluorine-free refrigeration industry.
The invention further aims to provide the application of the low-temperature antirust agent suitable for the fluorine-free refrigeration industry in rust prevention and corrosion prevention of the fluorine-free refrigeration industry.
The purpose of the invention is realized by the following scheme:
a low-temperature antirust agent suitable for the fluorine-free refrigeration industry comprises the following raw materials in percentage by mass:
30-40% of water, 10-20% of isopropanolamine, 5-15% of sebacic acid, 5-15% of isononanoic acid, 5-15% of methylbenzotriazole, 5-15% of diethylene glycol, 5-15% of propylene glycol methyl ether and 5-15% of antirust additive.
Preferably, the low-temperature antirust agent suitable for the fluorine-free refrigeration industry comprises the following raw materials in percentage by mass: 30-40% of water, 12-17% of isopropanolamine, 6-12% of sebacic acid, 6-12% of isononanoic acid, 7-10% of methylbenzotriazole, 6-15% of diethylene glycol, 10-12% of propylene glycol methyl ether and 6-9% of an antirust additive.
The antirust additive is prepared from the following components in percentage by mass:
20-40% of water, 20-40% of tricarboxylic acid, 20-40% of diethanolamine, 10-20% of boric acid and 10-20% of propylene glycol.
The antirust additive is prepared by the following method:
(1) mixing and stirring diethanolamine and boric acid for reaction to obtain a product for later use;
(2) and (2) mixing and stirring water, tricarboxylic acid and diethanol amine for reaction, then mixing and stirring the mixture and the product obtained in the step (1) for reaction, then adding propylene glycol for continuous mixing and stirring reaction, and obtaining the antirust additive after the reaction is finished.
The temperature of the mixing and stirring reaction in the step (1) is 80-120 ℃, the reaction time is 1.5-5 hours, and the stirring speed is 50-200 r/min; preferably, the temperature of the mixing and stirring reaction is 100 ℃, the reaction time is 3 hours, and the stirring speed is 100 revolutions per minute.
The time for the three times of mixing, stirring and reacting in the step (2) is independently 0.5-3 hours, preferably 1 hour; the stirring speed is independently 50-200 revolutions per minute, and preferably 100 revolutions per minute.
A method for preparing the low-temperature antirust agent applicable to the fluorine-free refrigeration industry comprises the following steps:
mixing water, isopropanolamine, sebacic acid, isononanoic acid, methylbenzotriazole, diethylene glycol, propylene glycol methyl ether and an antirust additive in sequence, and uniformly stirring to obtain the low-temperature antirust agent suitable for the fluorine-free refrigeration industry.
Preferably, each raw material is added in sequence and then stirred for 0.5-1 h, and finally, the antirust additive is added and then stirred for 1-3 h.
The low-temperature antirust agent suitable for the fluorine-free refrigeration industry is applied to rust prevention and corrosion prevention in the fluorine-free refrigeration industry.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. by adopting the low-residue formula, the residual quantity of the antirust agent on the surface of the refrigeration part can be reduced, and the hidden trouble of capillary blockage of a refrigeration system is solved.
2. The invention uses diethylene glycol and propylene glycol methyl ether to replace the surface active agent of the traditional antirust agent, and the antirust agent has excellent wetting performance at normal temperature, so that the antirust agent can be completely adhered to the surface of a part at normal temperature to form a compact protective film. The antirust agent can exert excellent antirust performance at lower temperature (normal temperature in summer and autumn and 30-40 ℃ in spring and winter).
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto. The reagents used in the examples are commercially available without specific reference. The normal temperature of the invention is 30-40 ℃.
In the embodiment, the enterprise standard specific detection method of the residue rate in table 2 is as follows:
1. a clean evaporation dish was weighed accurately (to the nearest 0.1 mg) using an analytical balance and recorded as W1. And (5) standby.
2. A predetermined weight of the sample was dropped on an evaporation dish by a dropper, and accurately weighed (to an accuracy of 0.1 mg) and recorded as W2。
3. And (3) putting the evaporation dish added with the sample in a constant-temperature drying box, evaporating at 100 ℃, and taking out after a specified time.
4. After evaporation, the evaporation dish is weighed accurately (to the nearest 0.1 mg) on an analytical balance and recorded as W3。
Calculating the evaporation residue rate:
H＝(W3-W1)/(W2–W1)×100％
in the formula, H-evaporation residue (%)
W3-W1Evaporation of the residue weight (mg)
W2–W1Sample weight (mg)
The rust inhibiting additives in the examples were prepared as follows:
mixing and stirring 12 parts of diethanolamine and 12 parts of boric acid at 100 ℃ for reaction for 3 hours at a stirring speed of 100 revolutions per minute to obtain a reactant B for later use; weighing 25 parts of pure water, 20 parts of tricarboxylic acid and 20 parts of diethanolamine according to a proportion, mixing and stirring at normal temperature for reaction for 1 hour, adding the reactant B, mixing and stirring for reaction for 1 hour, and finally adding 11 parts of propylene glycol, mixing and stirring for reaction for 1 hour, wherein the stirring speed is 100 revolutions per minute, thus obtaining the antirust additive. The parts are calculated by mass fraction.
Examples 1 to 2
The preparation method of the low-temperature antirust agent in the embodiment 1-2 is as follows:
mixing water, isopropanolamine, sebacic acid, isononanoic acid, methylbenzotriazole, diethylene glycol, propylene glycol methyl ether and an antirust additive in sequence, stirring for 0.5 hour after adding each raw material, and stirring for 2 hours after adding all the raw materials to obtain the low-temperature antirust agent suitable for the fluorine-free refrigeration industry. The amounts of the raw materials added are shown in Table 1.
Comparative example 1
This comparative example differs from example 1 in the composition of the raw materials
Table 1 raw material composition (mass percentage) of examples 1 to 2 and comparative example 1
TABLE 2 Properties of Low-temperature rust inhibitors obtained in examples 1-2 and comparative example 1
Control group: some brand XH-218 antirust agent purchased in the market
Table 2 shows the properties of the rust inhibitors obtained in examples 1 to 3. The antirust agent prepared by the invention has excellent antirust performance and anticorrosion performance and extremely low residue rate. In addition, the invention does not use high-residue raw materials such as inorganic salt and the like, selects a low-residue formula, reduces the residual amount of the antirust agent on the surface of the part, and solves the hidden trouble of capillary tube blockage of a refrigeration system.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A low-temperature antirust agent suitable for the fluorine-free refrigeration industry is characterized by comprising the following raw materials in percentage by mass:
30-40% of water, 10-20% of isopropanolamine, 5-15% of sebacic acid, 5-15% of isononanoic acid, 5-15% of methylbenzotriazole, 5-15% of diethylene glycol, 5-15% of propylene glycol methyl ether and 5-15% of antirust additive.
2. The low-temperature antirust agent applicable to the fluorine-free refrigeration industry according to claim 1, characterized in that the raw materials comprise the following components in percentage by mass:
30-40% of water, 12-17% of isopropanolamine, 6-12% of sebacic acid, 6-12% of isononanoic acid, 7-10% of methylbenzotriazole, 6-15% of diethylene glycol, 10-12% of propylene glycol methyl ether and 6-9% of an antirust additive.
3. The low-temperature antirust agent applicable to the fluorine-free refrigeration industry according to claim 1 or 2, characterized in that the antirust additive is prepared from the following components in percentage by mass:
20-40% of water, 20-40% of tricarboxylic acid, 20-40% of diethanolamine, 10-20% of boric acid and 10-20% of propylene glycol.
4. The low-temperature antirust agent applicable to the fluorine-free refrigeration industry according to claim 3, characterized in that the antirust agent is prepared by the following method:
(1) mixing and stirring diethanolamine and boric acid for reaction to obtain a product for later use;
(2) and (2) mixing and stirring water, tricarboxylic acid and diethanol amine for reaction, then mixing and stirring the mixture and the product obtained in the step (1) for reaction, then adding propylene glycol for continuous mixing and stirring reaction, and obtaining the antirust additive after the reaction is finished.
5. The low-temperature antirust agent applicable to the fluorine-free refrigeration industry according to claim 4, wherein the antirust agent comprises the following components in percentage by weight:
the temperature of the mixing and stirring reaction in the step (1) is 80-120 ℃, the reaction time is 1.5-5 hours, and the stirring speed is 50-200 r/min;
the time for the three times of mixing, stirring and reacting in the step (2) is independently 0.5-3 hours; the stirring speed is independently 50-200 r/min.
6. A method for preparing the low-temperature antirust agent suitable for the fluorine-free refrigeration industry as claimed in any one of claims 1 to 5, which is characterized by comprising the following steps:
mixing water, isopropanolamine, sebacic acid, isononanoic acid, methylbenzotriazole, diethylene glycol, propylene glycol methyl ether and an antirust additive in sequence, and uniformly stirring to obtain the low-temperature antirust agent suitable for the fluorine-free refrigeration industry.
7. The method of claim 6, wherein: and adding each raw material in sequence, stirring for 0.5-1 h, finally adding the antirust additive, and continuing stirring for 1-3 h.
8. The application of the low-temperature antirust agent applicable to the fluorine-free refrigeration industry according to any one of claims 1 to 5 in rust prevention and corrosion prevention of the fluorine-free refrigeration industry.
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2020
- 2020-08-11 CN CN202010800346.5A patent/CN111849601A/en active Pending
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