CN103614734A - Environment-friendly type metal cleaning agent with anti-corrosion function - Google Patents

Environment-friendly type metal cleaning agent with anti-corrosion function Download PDF

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CN103614734A
CN103614734A CN201310507809.9A CN201310507809A CN103614734A CN 103614734 A CN103614734 A CN 103614734A CN 201310507809 A CN201310507809 A CN 201310507809A CN 103614734 A CN103614734 A CN 103614734A
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analogue
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imidazoles
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metal cleaner
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CN103614734B (en
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孙霞
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Beijing love Industry & Trade Co., Ltd.
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Qingdao Huaren Technology Incubator Co Ltd
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Abstract

The invention provides an environment-friendly type metal cleaning agent with anti-corrosion function. The cleaning agent comprises 0.3%-5% of a defoaming agent, 1%-15% of a cationic surfactant, 1%-10% of an anionic surfactant, 3%-15% of a non-ionic surfactant, 20%-40% of a main cleaning agent, 2%-5% of a corrosion inhibitor and the balance of deionized water. The corrosion inhibitor comprises chlorinated 1-hydroxyethyl-3-cetyl imidazole and omega,omega'-bis (benzimidazole-2-yl) alkane. The metal cleaning agent provided by the invention has the advantages of low alkali, low foam and environment-friendliness, very strong oil removal effect at a lower temperature and low corrosion.

Description

The Environment-Protect Metal Cleaning Agents with corrosion proof function
Technical field
The present invention relates to clean-out system technical field, relate in particular to a kind of Environment-Protect Metal Cleaning Agents with corrosion proof function.
Background technology
When the maintenance and repair of machining and mechanical means, automobile etc., mostly adopt diesel oil, coal Water Oil Or Gas to carry out cleaning components as scavenging solution.This not only wastes energy, and exists potential unsafe factor, careless slightly, may lead to fire.In recent years, a kind of novel metal cleaner is widely used gradually, it well diesel oil substitute, kerosene and gasoline carry out cleaning components, and low price, is used safety, is well suited for mechanized cleaning operation.It can be for metal washs, and do not have rust staining.
At present, metal cleaner on the market contains the harmful chemical components such as strong acid, highly basic, phosphoric acid salt and aluminium salt mostly, and these chemical compositions not only can be brought certain infringement to metallic surface, and can cause certain harm to environment, due to complex process, cost is higher simultaneously.
Summary of the invention
Object of the present invention is exactly for the problems referred to above, and a kind of low alkali, low bubble, environmental protection are provided, and has at a lower temperature the effect of deoiling very by force, and the low-down efficient metal scavenger of corrodibility.
The invention provides a kind of metal cleaner, it comprises: defoamer 0.3%~5%, cats product 1%~15%, anion surfactant 1%~10%, nonionogenic tenside 3%~15%, cleaning host 20%~40%, inhibiter 2%~5% and surplus deionized water.
Wherein, described cleaning host consists of sodium phosphate and water glass, and the weight ratio between sodium phosphate and water glass is 2~4:1.
Wherein, described cats product can be one or more mixing in Varisoft TA 100, Trimethyllaurylammonium chloride, methyl-sulfuric acid alkyl trimethyl ammonium, chlorination cocoyl trimethyl ammonium and cetylpyridinium chloride.
Wherein, described anion surfactant can be alkyl carboxylate's (carboxylate salt) and poly-alkoxyl group carboxylate salt, alcohol b-oxide carboxylate salt, nonylphenol ethoxylate carboxylate salt, and analogue; Sulfonate, for example alkylsulfonate, alkylbenzene sulfonate, alkylaryl sulphonate, sulfonated fatty acid ester, and analogue; Vitriol, for example sulfated alcohols, sulfated alcohols b-oxide, sulfation alkylphenol, alkyl-sulphate, sulfosuccinate, sulfated alkyl ether, and analogue; And phosphoric acid ester, for example alkyl phosphate, and analogue.The anion surfactant exemplifying comprises sodium alkylarysulfonate, alpha-alefinically sulfonate and aliphatic alcohol sulfate.
Wherein, described nonionogenic tenside can for for example chloro-, benzyl-, methyl-, ethyl-, propyl group-butyl-and the polyglycol ether of other similar alkyl-blocked fatty alcohol; Do not contain the nonionogenic tenside of polyalkylene oxides, for example alkyl poly glucoside; Anhydro sorbitol and sucrose ester, and b-oxide; Amine oxide, for example alkoxide quadrol; Alcohol alkoxide, alcohol ethoxy propoxide for example, alcohol propoxide, alcohol the third oxygen ethoxy propoxide, alcohol ethoxy fourth oxide compound, and analogue; Nonylphenol ethoxylate, polyoxyethylene glycol ether and analogue; Carboxylicesters, glyceryl ester for example, polyoxyethylene ester, the ethoxyquin of lipid acid and binary alcohol esters, and analogue; Carboxylic acid amide, for example diethanolamine condenses, monoalkanolamine condenses, polyoxyethylene fatty amide, and analogue; And polyalkylene oxide block copolymer, comprising ethylene oxide/propylene oxide segmented copolymer, for example, with trade(brand)name
Figure BDA0000401750420000022
those that are purchased (BASF-Wyandotte), and analogue; With other similar non-ionic compound.Also can use organic silicon surfactant, for example
Described inhibiter is by chlorination 1-hydroxyethyl-3-hexadecyl imidazoles and ω, and ω '-bis-(benzimidazolyl-2 radicals-yl) alkane forms.
Described ω, ω '-bis-(benzimidazolyl-2 radicals-yl) alkane as shown in Equation 1, wherein, n=8.
Figure BDA0000401750420000021
Described chlorination 1-hydroxyethyl-3-hexadecyl imidazoles and ω, the mass ratio of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane is 1:1~1:2.
The preparation method of described chlorination 1-hydroxyethyl-3-hexadecyl imidazoles is specially:
The first step, the preparation of 1-hexadecyl imidazoles mixes the bromohexadecane of 1.79 imidazoles and 3.8mL in the ethyl acetate of 35mL, and magnetic agitation mixes for 10 minutes.Mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature is heated to 120 ℃ of isothermal reaction 16h, naturally cool to room temperature.Then mixture filtration is taken out to filtrate, with distilled water wash, for several times to remove the imidazoles of not participating in reaction, with Rotary Evaporators, solvent ethyl acetate is steamed, products therefrom 1-hexadecyl imidazoles is dried 12 hours to constant weight in 70 ℃ of vacuum drying ovens.Obtain weak yellow liquid, weigh product;
Second step, the ethylene chlorhydrin of the 1-hexadecyl imidazoles of 2.9g and 1ml is mixed in the ethyl acetate of 35ml, and magnetic agitation mixes for 10 minutes, wherein, reactant ethylene chlorhydrin is excessive, 1-hexadecyl imidazoles is fully reacted, mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature, be heated to 120 ℃, isothermal reaction 6h, naturally cools to room temperature.With Rotary Evaporators, solvent and excessive reactant ethylene chlorhydrin are steamed, within dry 12 hours in 70 ℃ of vacuum drying ovens, to constant weight, the chlorination 1-hydroxyethyl-3-hexadecyl imidazoles obtaining is white solid to products therefrom.
Described ω, the preparation method of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane is specially:
Take respectively 0.11mol O-Phenylene Diamine and 0.05mol fat diacid, in mortar, fully grind it is mixed, be transferred in three-necked flask.Add nitration mixture, logical nitrogen, heating reflux reaction under mechanical stirring.TLC tracking monitor finishes to reaction, and about 10h, pours in 250mL beaker, standing cooling, with strong aqua, regulates pH=7.Standing over night at 4 ℃, suction filtration is dry, and gained crude product methanol/water recrystallization, obtains sterling.
Wherein, described defoamer is selected from one or more in octanol, mineral oil, tributyl phosphate.
Beneficial effect of the present invention:
Metal cleaner provided by the invention has the advantage of low alkali, low bubble, environmental protection, have at a lower temperature the effect of deoiling very by force, and corrodibility is very low.
Embodiment
The invention provides a kind of metal cleaner, it comprises: defoamer 0.3%~5%, cats product 1%~15%, anion surfactant 1%~10%, nonionogenic tenside 3%~15%, cleaning host 20%~40%, inhibiter 2%~5% and surplus deionized water.
Described cleaning host consists of sodium phosphate and water glass, and the weight ratio between sodium phosphate and water glass is 2~4:1.
Described cats product can be one or more mixing in Varisoft TA 100, Trimethyllaurylammonium chloride, methyl-sulfuric acid alkyl trimethyl ammonium, chlorination cocoyl trimethyl ammonium and cetylpyridinium chloride.
Described anion surfactant can be alkyl carboxylate's (carboxylate salt) and poly-alkoxyl group carboxylate salt, alcohol b-oxide carboxylate salt, nonylphenol ethoxylate carboxylate salt, and analogue; Sulfonate, for example alkylsulfonate, alkylbenzene sulfonate, alkylaryl sulphonate, sulfonated fatty acid ester, and analogue; Vitriol, for example sulfated alcohols, sulfated alcohols b-oxide, sulfation alkylphenol, alkyl-sulphate, sulfosuccinate, sulfated alkyl ether, and analogue; And phosphoric acid ester, for example alkyl phosphate, and analogue.The anion surfactant exemplifying comprises sodium alkylarysulfonate, alpha-alefinically sulfonate and aliphatic alcohol sulfate.
Described nonionogenic tenside can for for example chloro-, benzyl-, methyl-, ethyl-, propyl group-butyl-and the polyglycol ether of other similar alkyl-blocked fatty alcohol; Do not contain the nonionogenic tenside of polyalkylene oxides, for example alkyl poly glucoside; Anhydro sorbitol and sucrose ester, and b-oxide; Amine oxide, for example alkoxide quadrol; Alcohol alkoxide, alcohol ethoxy propoxide for example, alcohol propoxide, alcohol the third oxygen ethoxy propoxide, alcohol ethoxy fourth oxide compound, and analogue; Nonylphenol ethoxylate, polyoxyethylene glycol ether and analogue; Carboxylicesters, glyceryl ester for example, polyoxyethylene ester, the ethoxyquin of lipid acid and binary alcohol esters, and analogue; Carboxylic acid amide, for example diethanolamine condenses, monoalkanolamine condenses, polyoxyethylene fatty amide, and analogue; And polyalkylene oxide block copolymer, comprising ethylene oxide/propylene oxide segmented copolymer, for example, with trade(brand)name
Figure BDA0000401750420000041
those that are purchased (BASF-Wyandotte), and analogue; With other similar non-ionic compound.Also can use organic silicon surfactant, for example
Figure BDA0000401750420000042
Described inhibiter is by chlorination 1-hydroxyethyl-3-hexadecyl imidazoles and ω, and ω '-bis-(benzimidazolyl-2 radicals-yl) alkane forms.
Described ω, ω '-bis-(benzimidazolyl-2 radicals-yl) alkane as shown in Equation 1, wherein, n=8.
Figure BDA0000401750420000043
Described chlorination 1-hydroxyethyl-3-hexadecyl imidazoles and ω, the mass ratio of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane is 1:1~1:2.
The preparation method of described chlorination 1-hydroxyethyl-3-hexadecyl imidazoles is specially:
The first step, the preparation of 1-hexadecyl imidazoles mixes the bromohexadecane of 1.79 imidazoles and 3.8mL in the ethyl acetate of 35mL, and magnetic agitation mixes for 10 minutes.Mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature is heated to 120 ℃ of isothermal reaction 16h, naturally cool to room temperature.Then mixture filtration is taken out to filtrate, with distilled water wash, for several times to remove the imidazoles of not participating in reaction, with Rotary Evaporators, solvent ethyl acetate is steamed, products therefrom 1-hexadecyl imidazoles is dried 12 hours to constant weight in 70 ℃ of vacuum drying ovens.Obtain weak yellow liquid, weigh product;
Second step, the ethylene chlorhydrin of the 1-hexadecyl imidazoles of 2.9g and 1ml is mixed in the ethyl acetate of 35ml, and magnetic agitation mixes for 10 minutes, wherein, reactant ethylene chlorhydrin is excessive, 1-hexadecyl imidazoles is fully reacted, mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature, be heated to 120 ℃, isothermal reaction 6h, naturally cools to room temperature.With Rotary Evaporators, solvent and excessive reactant ethylene chlorhydrin are steamed, within dry 12 hours in 70 ℃ of vacuum drying ovens, to constant weight, the chlorination 1-hydroxyethyl-3-hexadecyl imidazoles obtaining is white solid to products therefrom.
Described ω, the preparation method of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane is specially:
Take respectively 0.11mol O-Phenylene Diamine and 0.05mol fat diacid, in mortar, fully grind it is mixed, be transferred in three-necked flask.Add nitration mixture, logical nitrogen, heating reflux reaction under mechanical stirring.TLC tracking monitor finishes to reaction, and about 10h, pours in 250mL beaker, standing cooling, with strong aqua, regulates pH=7.Standing over night at 4 ℃, suction filtration is dry, and gained crude product methanol/water recrystallization, obtains sterling.
Described defoamer is selected from one or more in octanol, mineral oil, tributyl phosphate.
The present invention also provides the preparation method of above-mentioned metal cleaner, in deionized water, add in proportion defoamer, cats product, anion surfactant, nonionogenic tenside, cleaning host and inhibiter, stir about 30 minutes, obtain.
Below adopt embodiment to describe embodiments of the present invention in detail, to the present invention, how utilisation technology means solve technical problem whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.
The preparation of embodiment 1 chlorination 1-hydroxyethyl-3-hexadecyl imidazoles
The bromohexadecane of 1.79 imidazoles and 3.8mL (amount of substance is than being 2:1) is mixed in the ethyl acetate of 35mL, and magnetic agitation mixes for 10 minutes.Mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature is heated to 120 ℃ of isothermal reaction 16h, naturally cool to room temperature.Then mixture filtration is taken out to filtrate, with distilled water wash, for several times to remove the imidazoles of not participating in reaction, with Rotary Evaporators, solvent ethyl acetate is steamed, products therefrom 1-hexadecyl imidazoles is dried 12 hours to constant weight in 70 ℃ of vacuum drying ovens.Obtain weak yellow liquid, weigh product, the ethylene chlorhydrin of the 1-hexadecyl imidazoles of 2.9g and 1ml (amount of substance is than being 1:1.2) is mixed in the ethyl acetate of 35ml, magnetic agitation mixes for 10 minutes, wherein, reactant ethylene chlorhydrin is excessive, 1-hexadecyl imidazoles is fully reacted, mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and puts into digital baking oven, from room temperature, be heated to 120 ℃, isothermal reaction 6h, naturally cools to room temperature.With Rotary Evaporators, solvent and excessive reactant ethylene chlorhydrin are steamed, within dry 12 hours in 70 ℃ of vacuum drying ovens, to constant weight, the chlorination 1-hydroxyethyl-3-hexadecyl imidazoles obtaining is white solid to products therefrom.
Embodiment 2 ω, the preparation of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane
Take respectively 0.11mol O-Phenylene Diamine and 0.05mol fat diacid, in mortar, fully grind it is mixed, be transferred in three-necked flask.Add nitration mixture, logical nitrogen, heating reflux reaction under mechanical stirring.TLC tracking monitor finishes to reaction, and about 10h, pours in 250mL beaker, standing cooling, with strong aqua, regulates pH=7.Standing over night at 4 ℃, suction filtration is dry, and gained crude product methanol/water recrystallization, obtains sterling.
Embodiment 3: metal cleaner 1
Using defoamer tributyl phosphate 2g, cats product Varisoft TA 100 8g, anion surfactant tolyl sodium sulfonate 6g, by name as nonionogenic tenside commodity
Figure BDA0000401750420000061
silicon surfactant 12g, sodium phosphate 20g and chlorination 1-hydroxyethyl-3-hexadecyl imidazoles 2g of water glass 10g, embodiment 1 preparation, the ω of embodiment 2 preparations, ω '-bis-(benzimidazolyl-2 radicals-yl) alkane 2g is dissolved in deionized water, stirs about 30 minutes, obtains.
Comparative example 1 metal cleaner 2
Using defoamer tributyl phosphate 2g, cats product Varisoft TA 100 8g, anion surfactant tolyl sodium sulfonate 6g, by name as nonionogenic tenside commodity
Figure BDA0000401750420000062
silicon surfactant 12g, sodium phosphate 20g and chlorination 1-hydroxyethyl-3-hexadecyl imidazoles 4g of water glass 10g, embodiment 1 preparation be dissolved in deionized water, stir about 30 minutes, obtain.
Comparative example 2 metal cleaners 3
Using defoamer tributyl phosphate 2g, cats product Varisoft TA 100 8g, anion surfactant tolyl sodium sulfonate 6g, by name as nonionogenic tenside commodity
Figure BDA0000401750420000063
silicon surfactant 12g, sodium phosphate 20g and the ω of water glass 10g, embodiment 2 preparations, ω '-bis-(benzimidazolyl-2 radicals-yl) alkane 4g is dissolved in deionized water, stirs about 30 minutes, obtains.
Comparative example 3 metal cleaners 4
Using defoamer tributyl phosphate 2g, cats product Varisoft TA 100 8g, anion surfactant tolyl sodium sulfonate 6g, by name as nonionogenic tenside commodity
Figure BDA0000401750420000071
silicon surfactant 12g, sodium phosphate 20g and water glass 10g be dissolved in deionized water, stir about 30 minutes, obtain.
The metal cleaner of embodiment 1 and comparative example 1-3 acquisition is carried out to metallic aluminium clean surface greasy dirt and clean, the results are shown in Table 1.
Cleaning rate: the greasy dirt weight/greasy dirt original weight of cleaning rate=wash;
Non-corrosibility: grading standard: 0 grade of surface is rustless, without considerable change.
1 grade of surface is rustless, light discolouration or loss of gloss.
2 grades of light rust in surface or inhomogeneous variable color.
3 grades of surperficial big area corrosions.
Stability: mixed composition was placed after 4 hours, observed its layering situation, stabilizes to not stratified not muddyly, and shakiness is decided to be layering or muddiness.
Table 1
Group Non-corrosibility Cleaning rate Stability
Embodiment 3 0 grade 95.3 Stable
Comparative example 1 2 grades 92.7 Stable
Comparative example 2 2 grades 91.6 Stable
Comparative example 3 3 grades 90.3 Stable
All above-mentioned these intellecture properties of primary enforcement, do not set restriction this product innovation of other forms of enforcement and/or novel method.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on product innovation of the present invention.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.

Claims (9)

1. a metal cleaner, it is characterized in that, comprise: defoamer 0.3%~5%, cats product 1%~15%, anion surfactant 1%~10%, nonionogenic tenside 3%~15%, cleaning host 20%~40%, inhibiter 2%~5% and surplus deionized water, described inhibiter is by chlorination 1-hydroxyethyl-3-hexadecyl imidazoles and ω, and ω '-bis-(benzimidazolyl-2 radicals-yl) alkane forms.
2. metal cleaner as claimed in claim 1, is characterized in that: described cleaning host consists of sodium phosphate and water glass, and the weight ratio between sodium phosphate and water glass is 2~4:1.
3. metal cleaner as claimed in claim 1 or 2, is characterized in that: described cats product can be one or more mixing in Varisoft TA 100, Trimethyllaurylammonium chloride, methyl-sulfuric acid alkyl trimethyl ammonium, chlorination cocoyl trimethyl ammonium and cetylpyridinium chloride.
4. the metal cleaner as described in claims 1 to 3, it is characterized in that: described anion surfactant can be alkyl carboxylate's (carboxylate salt) and poly-alkoxyl group carboxylate salt, alcohol b-oxide carboxylate salt, nonylphenol ethoxylate carboxylate salt, and analogue; Sulfonate, for example alkylsulfonate, alkylbenzene sulfonate, alkylaryl sulphonate, sulfonated fatty acid ester, and analogue; Vitriol, for example sulfated alcohols, sulfated alcohols b-oxide, sulfation alkylphenol, alkyl-sulphate, sulfosuccinate, sulfated alkyl ether, and analogue; And phosphoric acid ester, for example alkyl phosphate, and analogue.The anion surfactant exemplifying comprises sodium alkylarysulfonate, alpha-alefinically sulfonate and aliphatic alcohol sulfate.
5. the metal cleaner as described in claim 1 to 4, is characterized in that: described nonionogenic tenside can for for example chloro-, benzyl-, methyl-, ethyl-, propyl group-butyl-and the polyglycol ether of other similar alkyl-blocked fatty alcohol; Do not contain the nonionogenic tenside of polyalkylene oxides, for example alkyl poly glucoside; Anhydro sorbitol and sucrose ester, and b-oxide; Amine oxide, for example alkoxide quadrol; Alcohol alkoxide, alcohol ethoxy propoxide for example, alcohol propoxide, alcohol the third oxygen ethoxy propoxide, alcohol ethoxy fourth oxide compound, and analogue; Nonylphenol ethoxylate, polyoxyethylene glycol ether and analogue; Carboxylicesters, glyceryl ester for example, polyoxyethylene ester, the ethoxyquin of lipid acid and binary alcohol esters, and analogue; Carboxylic acid amide, for example diethanolamine condenses, monoalkanolamine condenses, polyoxyethylene fatty amide, and analogue; And polyalkylene oxide block copolymer, comprising ethylene oxide/propylene oxide segmented copolymer, for example, with trade(brand)name
Figure FDA0000401750410000011
those that are purchased (BASF-Wyandotte), and analogue; With other similar non-ionic compound.Also can use organic silicon surfactant, for example
6. the metal cleaner as described in claim 1 to 5, is characterized in that: described chlorination 1-hydroxyethyl-3-hexadecyl imidazoles and ω, the mass ratio of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane is 1:1~1:2.
7. the metal cleaner as described in claim 1 to 6, is characterized in that: the preparation method of described chlorination 1-hydroxyethyl-3-hexadecyl imidazoles is specially,
The first step, the preparation of 1-hexadecyl imidazoles mixes the bromohexadecane of 1.79 imidazoles and 3.8mL in the ethyl acetate of 35mL, and magnetic agitation mixes for 10 minutes.Mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature is heated to 120 ℃ of isothermal reaction 16h, naturally cool to room temperature.Then mixture filtration is taken out to filtrate, with distilled water wash, for several times to remove the imidazoles of not participating in reaction, with Rotary Evaporators, solvent ethyl acetate is steamed, products therefrom 1-hexadecyl imidazoles is dried 12 hours to constant weight in 70 ℃ of vacuum drying ovens.Obtain weak yellow liquid, weigh product;
Second step, the ethylene chlorhydrin of the 1-hexadecyl imidazoles of 2.9g and 1ml is mixed in the ethyl acetate of 35ml, and magnetic agitation mixes for 10 minutes, wherein, reactant ethylene chlorhydrin is excessive, 1-hexadecyl imidazoles is fully reacted, mixture is poured in the polytetrafluoroethyllining lining that capacity is 60mL, polytetrafluoroethyllining lining is encapsulated in stainless steel cauldron, and put into digital baking oven, from room temperature, be heated to 120 ℃, isothermal reaction 6h, naturally cools to room temperature.With Rotary Evaporators, solvent and excessive reactant ethylene chlorhydrin are steamed, within dry 12 hours in 70 ℃ of vacuum drying ovens, to constant weight, the chlorination 1-hydroxyethyl-3-hexadecyl imidazoles obtaining is white solid to products therefrom.
8. the metal cleaner as described in claim 1 to 7, it is characterized in that: described ω, the preparation method of ω '-bis-(benzimidazolyl-2 radicals-yl) alkane is specially and takes respectively 0.11mol O-Phenylene Diamine and 0.05mol fat diacid, in mortar, fully grind it is mixed, be transferred in three-necked flask.Add nitration mixture, logical nitrogen, heating reflux reaction under mechanical stirring.TLC tracking monitor finishes to reaction, and about 10h, pours in 250mL beaker, standing cooling, with strong aqua, regulates pH=7.Standing over night at 4 ℃, suction filtration is dry, and gained crude product methanol/water recrystallization, obtains sterling.
9. the metal cleaner as described in claim 1 to 8, is characterized in that: described defoamer is selected from one or more in octanol, mineral oil, tributyl phosphate.
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