CN1539907A - Composite type agent for melting ice and removing snow - Google Patents
Composite type agent for melting ice and removing snow Download PDFInfo
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- CN1539907A CN1539907A CNA2003101049500A CN200310104950A CN1539907A CN 1539907 A CN1539907 A CN 1539907A CN A2003101049500 A CNA2003101049500 A CN A2003101049500A CN 200310104950 A CN200310104950 A CN 200310104950A CN 1539907 A CN1539907 A CN 1539907A
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
A composite ice and snow thawing agent in the form of crystal particles is prepared from magnesium chloride, sodium molybdate, sodium tungstate, BTA, sodium tetraborate, EDTA-bisodium salt, and bicyclohexamine nitrite. Its advantages are no damage to metal, concrete and plant, and high thawing speed.
Description
Compound sleet melting and snow removing agent ice-melt snow removing effect is remarkable, widely applicable, and possesses the characteristics of novelty, creativeness and practicality, and the while compliance with environmental protection requirements now is described as follows particular content:
One, technical field: belong to the surface chemistry category, be organic and inorganic compounding salt technical field
Two, background technology
1, to inventing the understanding of " compound sleet melting and snow removing agent ":
(1) the selected main raw material of compound sleet melting and snow removing agent has: magnesium chloride, Sodium orthomolybdate, Sodium Benzoate, Sodium Nitrite, sodium wolframate, benzotriazole, sodium tetraborate, EDTA disodium salt (TW-204), dicyclohexyl amine nitrite.These industrial chemicals are through optimum combination, theoretical investigation, and after a large amount of laboratory and application test, the common conclusion that draws is the attribute that the present invention has low plait point, is applicable under-33 ℃ the low-temperature condition, and ice-melt snow removing effect is remarkable, can be according to different areas, different temperature, different geographical environments and different applications, adopt different formula combination, its coverage rate is comparatively extensive, is suitable for all cities uses to the north of the Yellow River.
(2) good environmental protection of the present invention can reduce the corrosion to metal and cement concrete effectively.As everyone knows, contain a large amount of Cl in the halogen
-Ion and a spot of impurity SO
4 2-Ion, and these ion pair metals and concrete corrosion meeting increase along with the increase of concentration, therefore, in selection, at first selects for use to contain SO
4 2-Ion is extremely low, and to the extremely faint Nitrates of metallic corrosion as main raw.In view of under-33 ℃ cold condition, we have adopted its low plait point again in triturating be main raw material at the magnesium chloride below-33.6 ℃, and with other eight kinds of feedstock optimizations combinations, by compound prescription, in actual applications, reduced corrosion effectively to metal and cement concrete.
(3) the present invention promotes plant-growth, preserves the ecological environment
Because the long-term of halogen class Snow Agent used in a large number, will cause soil compaction, saltiness increases, and causes morbid state growth and even the death of trees.Plant to muriatic controlling index is: when the ratio of the saltiness of soil and the weight of soil less than 0.15% the time, plant normal growth; When ratio during at 0.15%-0.25%, plant just slightly is injured; Be that severe is injured when 0.25-0.4%; Be that the degree of depth is injured when 0.4%-0.6%; Greater than 0.6% o'clock, plant was with death.
In sum, we have selected the main raw material(s) as compound sleet melting and snow removing agent such as magnesium chloride for use.The present invention is reaching on the ice-melt snow removing obvious results basis, reduced the extent of corrosion of metal and cement concrete effectively, promoted the growth of plants such as flower, grass, trees, shown that from the result of theory and practice compound sleet melting and snow removing agent has higher use value.
(4) scope of application is extensive, and snow removing usefulness is remarkable
Compound sleet melting and snow removing agent is irregular, the polygonal particulate state of 0.5～8mm, it mainly is applicable to the ice-melt snow removing of different kinds of roads, bridge, airport, garden, and particularly the large-scale operation of the ice-melt in all kinds of rails of track traffic, rail, viaduct, People's Bank of China's overpass, park and greenery patches at the intersections snow removing is used.
2, the present invention consults and quote as proof relevant technical background data (seven classes):
(1) Higher Education Publishing House institution of higher education's teaching material " general chemistry " of publishing
Chapter 1: first segment: the state of aggregation P3-P8 of material
Second joint: the gas law P8-P12
The 3rd joint: the general character P13-P26 of dilute solution
Chapter 4: the 4th joint: metallic corrosion and prevent P160-P166
Chapter 7: the 3rd joint: the physical properties of mineral compound and crystalline structure P278-P289
The 4th joint: the Property P 289-P309 of mineral compound
(2) " Rust of Rebar in Concrete and the protection " of Chinese industrial press publication
Chapter 1: first segment: the theoretical emphasis of metallic corrosion, P4-P10
Second joint: the reason P10-P16 of concrete protection mechanism and steel bar corrosion
The 3rd joint: steel bar corrosion causes the example P26-P27 of reinforced concrete structure failure
Chapter 2: the 4th joint: the surrounding medium characteristics influence P29-P42
The 5th joint: morphological element's condition of surface of steel and stress intensity influence P42-P73
(3) " nitrate " book of chemical engineering industry press publication:
Chapter 2: " saltpetre " P35-P63
Chapter 3: " SODIUMNITRATE " P64-P77
Chapter 5: " nitrocalcite " P82-P89
(4) " the chemical industry dictionary " of chemical engineering industry press publication
(5) " Organic Chemicals " of Chemical Industry Press's publication
A: fatty compounds: A530 vulkacit H P433-P435
A602 thiocarbamide P500-P502
A632 alkane an aromatic plant metioned in ancient books barium sulfonate P526-P527
B: alicyclic compound reaches derivative altogether, B036 dicyclohexyl amine nitrite P557
C: aromatics C260 aniline P281-P282
(6) " corrosion and protection in the chemical industry " of chemical engineering industry press publication
Chapter 1: first segment: corrosive harm P1-P3 in corrosion and the chemical industry
Second joint: chemical industry corrosive characteristics and present situation P4-P9
The 3rd joint: domestic and international chemical anticorrosion progress P10-P14
The 4th joint: the strategy of sustainable development and corrosive are controlled comprehensively
Green Chemistry is applied to anticorrosion technique P34-P35
Chapter 3: second joint: the main protection against corrosion means P69-P74 during soda ash is produced
Chapter 4: the corrosion and protection in the chlorine industry
First segment: the corrodible property P87-P88 in the chlorine industry
Second joint: the corrosion and protection P88-P93 of salt brine solution
Chapter 5: the corrosion and protection in the chemical fertilizers production
The 7th joint: the corrosion and protection P180-P188 in the production of phosphate fertilizer
The 8th joint: the corrosion and protection P188-P195 during potash fertilizer is produced
Chapter 7: the corrosion and protection in the pesticide producing
The 6th joint: the means of defence P320-P322 of cement surface
Chapter 9: the corrosion and protection of chemical building thing and structures
First segment: corrosion condition P439-P441
Second joint: the analysis of Corrosion Reason P441-P448
The 3rd joint: protection against corrosion principle of design: P449-P450
The 5th joint: anticorrosive measure P451-P454
The 6th joint: reinforce recovery technique P455-P460
(7) " Elementary Chemical Industry " of Chemical Industry Press's publication
Chapter 11: freezing, the 5th joint: refrigerant and cold carrier P374
3, the purpose of invention " compound sleet melting and snow removing agent ":
(1) in time dredges road, ensure various normal vehicle operation.
(2) reduce the snow way of escape and slide the generation of pedestrian's tumble injury and various traffic accidents.
(3) reduce a large amount of fortune snow that removes and work, time saving and energy saving.
(4) safeguard that city appearance environment is clean and tidy, establish the city favorable image.
(5) build warm happy and auspicious, comfortable live and work environment for citizen.
Three, summary of the invention
1, compound sleet melting and snow removing agent is by magnesium chloride (MgCl
2), Sodium orthomolybdate (Na
2MoO
4), Sodium Benzoate (C
7H
5NaO
2), Sodium Nitrite (NaNO
2), sodium wolframate (Na
2WO
4), benzotriazole (BTA), sodium tetraborate (Na
2B
4O
7), EDTA disodium salt (TW-204), dicyclohexyl amine nitrite (C
12H
23NHNO
2) three kinds or four kinds of compositions, (weight %) is as follows for its proportioning: magnesium chloride (0-90%), Sodium orthomolybdate (0.1-10%), Sodium Benzoate (0.1-10%), Sodium Nitrite (0.1-10%), sodium wolframate (0.1-5%), benzotriazole (BTA) (0.1-5%), sodium tetraborate (0.1-5%), EDTA disodium salt (TW-204) (0.1-5%), dicyclohexyl amine nitrite (0.1-10%).
2, claimed claim is as follows:
(1)MgCl
2+Na
2MoO
4+C
7H
5NaO
2
(2)MgCl
2+Na
2MoO
4+NaNO
2
(3)MgCl
2+Na
2MoO
4+Na
2WO
4
(4) MgCl
2+ Na
2MoO
4+ benzotriazole (BTA)
(5) MgCl
2+ Na
2MoO
4+ NaNO
2+ benzotriazole (BTA)
(6)MgCl
2+Na
2B
4O
7+NaNO
2
(7) MgCl
2+ EDTA disodium salt (TW-204)+Na
2MoO
4+ NaNO
2
(8)MgCl
2+C
12H
23N·HNO
2
(9) compound sleet melting and snow removing agent is the Polygons nature crystal grain shape of 0.5-8mm.
In sum, the claimed claim number of compound sleet melting and snow removing agent is 9.
3, the beneficial effect compared with background technology of the present invention:
(1) compound sleet melting and snow removing agent ice-melt snow removing speed is fast, effective; With low cost, widely applicable, the raw material supply abundance is easy to buying, production technique, technical scheme, simple and easy to do.
(2) good environmental protection can effectively reduce metal and concrete corrosion, and the composition of improving the soil, but stable soil structure promote plant-growth.
(3) this product is more suitable on a large scale, mechanize sheds operation, and spreading is comparatively even, can give full play to its ice-melt usefulness at the aspects such as track of viaduct and track traffic.
Claims (3)
1, the total essential features of the present invention and prior art is:
No matter compound sleet melting and snow removing agent and present employed Snow Agent are solid-state or liquid state, all are in order to reduce the freezing point effect of water.Its snow melting mechanism belongs to the surface chemistry category, is organic and inorganic compounding salt technical field.A large amount of heat releases when it utilizes the water-absorbent of Snow Agent and Snow Agent to melt make the structural lattice dislocation in the snow, cause ice dissolution; Absorb heat during ice dissolution, surrounding temperature is descended, at this moment, the vapour pressure of solution in order to reach new balance, impels ice and snow constantly to melt and form solution less than the vapour pressure of ice and snow, thus the reduction zero pour.Under cold condition, the essential features that the melting ice and snow that the above-mentioned compound movement equilibrium process that goes round and begins again is exactly a Snow Agent is total.
The compound sleet melting and snow removing agent of the present invention in the process of development, is not only paid attention to the effect of ice-melt snow removing, but also social benefit and environmental benefit have been taken into account, and the present Snow Agent of using of emphasis solution, to metal and concrete etching problem, and the unfavorable factor that influences plant-growth.
2, compound sleet melting and snow removing agent according to claim 1 is characterized in that:
Can reduce corrosion of metal effectively.
According to the different characteristics of metallic corrosion process, can be divided into two kinds of chemical corrosion and galvanic corrosion.
Chemical corrosion
The simple corrosion that is caused by chemical action is called chemical corrosion.Mainly be since the at high temperature easy oxidized generation one deck oxide skin of metal (by FeO, Fe
2O
3And Fe
3O
4Form), also the decarburization phenomenon can take place simultaneously, this is because the result that cementite in the iron and steel and gaseous media effect are produced.For example:
、
、
The gaseous product that reaction generates, leave the metallic surface, and carbon just from contiguous, still unreacted metal inside is diffused into this reaction zone gradually, so the carbon in the metal level reduces gradually, form Decarburized layer, steel surface is because decarburization causes hardness to reduce to reduce with safe range of stress.
Galvanic corrosion
The corrosion that is caused by electrochemical action is galvanic corrosion.It causes mainly due to having formed galvanic cell.Owing to also contain graphite beyond industrial iron and steel, the deironing.Cementite etc., these impurity can conduct electricity, and electropotential algebraic value big than iron is difficult to lose electronics, and iron phase is to just losing electronics easily, and in addition, owing to dissolved airborne CO in the moisture film of iron absorption
2And SO
2Gas reaction is as follows:
、
, like this, Fe is just having H
+, OH
-, HCO
3 -, HSO
3 -Solution in formed galvanic cell, anodic Fe has lost 2e and has become Fe
2+, react and be:
The 2H of negative electrode
+Become H to 2e
2, that is: react and be
, Fe
2+Enter in the solution and OH
-Generate Fe (OH)
2, Fe (OH)
2Become Fe (OH) by dioxygen oxidation
3, Fe (OH)
3Fe after the dehydration
2O
3It is the major ingredient of sorrel iron rust.Reaction formula is as follows:
，
In the ordinary course of things, if the very weak or neutral solution of moisture film acidity of iron surface absorption then also is that iron is oxidized to Fe on anode
2+Ion mainly is the oxygen thing electronics that is dissolved in the moisture film at anode:
Anode:
Negative electrode:
The total reaction equation:
Fe (OH) then
2Be oxidized to Fe (OH)
3And partial dehydration is iron rust, and oxygen uptake that Here it is corrosion also is the main corrosion of metal.
Analysis at above-mentioned corrosion principle, compound sleet melting and snow removing agent has specially adopted three kinds or four kinds in the magnesium chloride, Sodium orthomolybdate, Sodium Benzoate, Sodium Nitrite, sodium wolframate, benzotriazole, sodium tetraborate, EDTA disodium salt (TW-204), dicyclohexyl amine nitrite of present domestic favorable anti-corrosion effect, by its ratio optimization combination, make metal surface passivation, generate the Fe of one deck densification
3O
4Oxide film is protected metallic surface, has reduced corrosion of metal effectively.
Can effectively reduce corrosion to cement concrete
Cement concrete is a kind of material of construction, and it is by liquid slurries in cement or other gelling material such as gravel, cobble, rubble, sand, can be described as a kind of artificial stone-like material.It mainly is made up of multiple oxide compound, as CaO, SiO
2, Al
2O
3, not following tens kinds of oxide compounds such as MgO.The corrosion of cement mainly is the corrosion of the water and the aqueous solution.The corrosion of water is corroded dissolving, and this is that porosity and rate of permeation by cement material itself determined that the corrosion of cement mainly is that the aqueous solution is to its chemical corrosion of carrying out.Chemical reaction has taken place to some composition in the cement in some compound in the physical environment, the corrosion of Here it is cement concrete.This corrosion mainly contains two class factors: a kind of corrosion that is acid soft water to cement, and as the CO in the water
2With the Ca (OH) in the cement
2And CaCO
3Reaction generates Ca (HCO
3)
2, reaction equation is as follows:
Here point out: if the CaCO that reaction generates
3Content increase and the CO in the water
2Content is lower, and so such corrosion almost is difficult to carry out.In addition, chemical reaction has taken place in the hydrated product in soluble sulphate and the cement, causes volume of concrete to expand or disintegration.For example: to Na
2SO
4Hydrated product reaction in the cement is as follows:
Prove by experiment: alkali metal sulfates can not corrode calcium silicate hydrate.But the corrodible Ca of sulfate of ammoniac (OH)
2, reaction formula is:
, corrosion product " NH
4OH " Yi Rong, difficult volatilization makes reaction be easy to carry out to the right, below in the expression water sulfate concentration to the Portland cement corrupting influence:
SO
4 2-mg/L
Extent of corrosion
＜300 Humble
300-600 Low
601-1500 Medium
1501-5000 Seriously
＞5000 Very serious
By the table in as can be seen: have only SO in the water
4 2-Concentration during less than 300mg/L, corrodibility is just lower.Be noted that the sulphate corrosion product is little because of solubleness, but the destruction of the stress exacerbate water cement concrete that precipitated product caused that they generate.
Do not mention Cl in the last table
-The ion pair steel bars in concrete transfers active state to by passive state, forms corrosion product, expands and produce, and makes the cement concrete cracking, peels off, thereby lost mechanical property, hurtful introduction.Learn but analyze by experiment: Cl
-Ion will make reinforcing bar transfer active state to by passive state, be to reach certain threshold value.Academia is thought: Cl
-/ OH 〉=0.61 promptly is equivalent to: 0.3-0.6kg Cl
-/ m
3Size.When this type of problem of solution, the one, control Cl in the Snow Agent
-The ionic percentage composition; The 2nd, reduce the content of vitriol in the Steel Concrete as far as possible, have only to reach this two requirements simultaneously, the etching problem of cement concrete and reinforcing bar could effectively solve.For this reason, main material halogen class and Nitrates that we are selected, its SO
4 2-Ionic content is significantly less than the content in the pure halogen, has reduced the corrosion of cement concrete effectively.
Can promote the growth of plant, preserve the ecological environment
Because the use of pure halide Snow Agent, cause that saltiness increases in the soil, the moisture content of plant absorbing and nutrient are reduced, and cause the greenery patches harden and trees, vegetation etc. are in the morbid state growth, finally cause trees death.Experimental results show that: when the ratio of the saltiness of soil and the weight of soil less than 0.15% the time, plant normal growth; Ratio is when 0.15%-0.25%, and plant just slightly is injured; Be that severe is injured when 0.25%-0.4%; Be that the degree of depth is injured when 0.4%-0.6%, and if in case greater than 0.6% o'clock, plant is with death.Given this; adopted magnesium chloride, Sodium orthomolybdate, Sodium Benzoate, Sodium Nitrite, sodium wolframate, benzotriazole, sodium tetraborate, EDTA disodium salt (TW-204), dicyclohexyl amine nitrite as main raw material in the compound sleet melting and snow removing agent that we invented in a large number; can protect greenery patches and arboreal growth effectively, the protection of ecotope is had active effect.
The compound sleet melting and snow removing agent scope of application is extensive
It mainly is applicable to the ice-melt snow removing of different kinds of roads, bridge, airport, garden, the particularly ice-melt in all kinds of rails of track traffic, rail, viaduct, People's Bank of China's overpass, park and greenery patches at the intersections snow removing.
Compound sleet melting and snow removing agent, ice-melt snow removing speed is fast, efficient is high, effective, the main raw of its prescription is magnesium chloride, Sodium orthomolybdate, Sodium Benzoate, Sodium Nitrite, sodium wolframate, benzotriazole, sodium tetraborate, EDTA disodium salt (TW-204), dicyclohexyl amine nitrite, its minimum plait point is in different low-temperature conditions, therefore, according to different areas, different geographical environment and different use objects, different temperature adopts different formula combination.Its coverage rate is comparatively extensive, and is with low cost, and the raw material supply abundance is convenient to buying, and technical scheme is simple and easy to do.
3, compound sleet melting and snow removing agent according to claim 2 is characterized in that: by magnesium chloride (MgCl
2), Sodium orthomolybdate (Na
2MoO
4), Sodium Benzoate (C
7H
5NaO
2), Sodium Nitrite (NaNO
2), sodium wolframate (Na
2WO
4), benzotriazole (BTA), sodium tetraborate (Na
2B
4O
7), EDTA disodium salt (TW-204), dicyclohexyl amine nitrite (C
12H
23NHNO
2) three kinds or four kinds of compositions, (weight %) is as follows for its proportioning: magnesium chloride (0-90%), Sodium orthomolybdate (0.1-10%), Sodium Benzoate (0.1-10%), Sodium Nitrite (0.1-10%), sodium wolframate (0.1-5%), benzotriazole (BTA) (0.1-5%), sodium tetraborate (0.1-5%), EDTA disodium salt (TW-204) (0.1-5%), dicyclohexyl amine nitrite (0.1-10%).
The technical formula of compound sleet melting and snow removing agent is as follows:
(1)MgCl
2+Na
2MoO
4+C
7H
5NaO
2
(2)MgCl
2+Na
2MoO
4+NaNO
2
(3)MgCl
2+Na
2MoO
4+Na
2WO
4
(4) MgCl
2+ Na
2MoO
4+ benzotriazole (BTA)
(5) MgCl
2+ Na
2MoO
4+ NaNO
2+ benzotriazole (BTA)
(6)MgCl
2+Na
2B
4O
7+NaNO
2
(7) MgCl
2+ EDTA disodium salt (TW-204)+Na
2MoO
4+ NaNO
2
(8)MgCl
2+C
12H
23N·HNO
2
(9) compound sleet melting and snow removing agent is the Polygons nature crystal grain shape of 0.5-8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101049500A CN1539907A (en) | 2003-10-29 | 2003-10-29 | Composite type agent for melting ice and removing snow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101049500A CN1539907A (en) | 2003-10-29 | 2003-10-29 | Composite type agent for melting ice and removing snow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1539907A true CN1539907A (en) | 2004-10-27 |
Family
ID=34333567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101049500A Pending CN1539907A (en) | 2003-10-29 | 2003-10-29 | Composite type agent for melting ice and removing snow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1539907A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806504A (en) * | 2022-04-19 | 2022-07-29 | 华能伊敏煤电有限责任公司 | Anti-freezing adhesive preparation for outdoor conveying adhesive tape in alpine region and preparation method thereof |
-
2003
- 2003-10-29 CN CNA2003101049500A patent/CN1539907A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806504A (en) * | 2022-04-19 | 2022-07-29 | 华能伊敏煤电有限责任公司 | Anti-freezing adhesive preparation for outdoor conveying adhesive tape in alpine region and preparation method thereof |
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