CN102002341A - Soil self-repairing type environmentally-friendly snow melting agent and preparation method thereof - Google Patents

Soil self-repairing type environmentally-friendly snow melting agent and preparation method thereof Download PDF

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CN102002341A
CN102002341A CN2010105625896A CN201010562589A CN102002341A CN 102002341 A CN102002341 A CN 102002341A CN 2010105625896 A CN2010105625896 A CN 2010105625896A CN 201010562589 A CN201010562589 A CN 201010562589A CN 102002341 A CN102002341 A CN 102002341A
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snow
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agent
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water soluble
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CN102002341B (en
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丁湛
谭昉畅
仇建
栗庆铭
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Changan University
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Changan University
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Abstract

The invention discloses a soil self-repairing type environmentally-friendly snow melting agent and a preparation method thereof. The snow melting agent comprises the following components in percentage by weight: 1.17 to 2.06 percent of modified starch, 0.3 to 0.5 percent of corrosion inhibitor, 30.38 to 30.72 percent of magnesium chloride, 43.85 to 44.34 percent of magnesium acetate, 17.79 to 17.99 percent of calcium nitrate, 2.82 to 2.85 percent of potassium nitrate, and 2.60 to 2.63 percent of potassium acetate, wherein the modified starch is water-soluble starch which is prepared by a grafting acrylic acid process, and the corrosion inhibitor is sodium benzoate, sulfocarbamide, sodium polyphosphate or zinc sulfate. The modified starch of the soil self-repairing type environmentally-friendly snow melting agent can greatly slow down the self dissolution rate of the snow melting agent under the condition of ensuring the snow melting capacity, plays a role of a colloid in soil to adsorb inorganic small molecules and inorganic salt ions and greatly slow down the infiltration rate of the inorganic small molecules and the inorganic salt ions, and then is metabolized and degraded by soil microbes and plants, thereby preventing the snow melting agent from polluting underground water.

Description

Soil self-repair type environment protection snow-dissolved agent and preparation method thereof
Technical field
The invention belongs to the derived energy chemical technical field, be specifically related to a kind of soil self-repair type environment protection snow-dissolved agent and preparation method thereof.
Background technology
It is the inconvenience that people produce and life brings that the using of Snow Agent reduced the snowfall in winter greatly, but the irreversible harm that environment is caused owing to traditional Snow Agent forces numerous researchers progressively to carry out the research and development of novel Snow Agent.The development trend of Snow Agent develops to the organic class Snow Agent of polycomponent from traditional single chloride salt Snow Agent.Snow Agent the earliest is an industrial salt sodium-chlor, then begins with magnesium chloride, Repone K and calcium chloride, or their mixture.Organic in recent years class Snow Agent engenders, but owing to its raw material costliness, the snow melt effect causes its use range also less not as traditional Snow Agent ideal.
In general, there is following defective in present commercially available Snow Agent in actual application:
(1) chloride ion content in the Snow Agent is too high, and the negatively charged ion of principal goods material all is a chlorion generally speaking.The a large amount of chlorions that remain in after the snow melt on the road surface will road pavement produce corrosion, the functional quality of havoc road and working life.
(2) the principal goods material kind chosen of Snow Agent is single, and single salt ionic concentration is too high in the snow-broth that causes melting, and will endanger plant-growth and human body health after flowing into soil and underground water.
(3) Snow Agent solubleness is big, dissolution rate is too fast, cause Snow Agent action time short, usage quantity is excessive and effect back unit volume snow-broth in the Snow Agent excessive concentration, thereby produce excessive accumulation in the soil around and cause soil and groundwater pollution easily.
(4) the part Snow Agent costs an arm and a leg, and using method is limited, is difficult to apply on a large scale.
Therefore, the research and development thing of novel Snow Agent must gone.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned the deficiencies in the prior art, and a kind of soil self-repair type environment protection snow-dissolved agent with better snow melt effect is provided.Soil self-repair type environment protection snow-dissolved agent of the present invention has been avoided phreatic pollution, can avoid the corrosive nature to road simultaneously fully.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of soil self-repair type environment protection snow-dissolved agent, it is characterized in that, this Snow Agent is made up of following raw materials by weight percent: treated starch 1.17%~2.06%, inhibiter 0.3%~0.5%, magnesium chloride 30.38%~30.72%, magnesium acetate 43.85%~44.34%, nitrocalcite 17.79%~17.99%, saltpetre 2.82%~2.85%, Potassium ethanoate 2.60%~2.63%; Described treated starch is that water soluble starch graft acrylic acid prepared forms, and described inhibiter is Sodium Benzoate, thiocarbamide, sodium polyphosphate or zinc sulfate.
Above-mentioned Snow Agent is made up of following raw materials by weight percent: treated starch 1.49%, inhibiter 0.33%, magnesium chloride 30.61%, magnesium acetate 44.18%, nitrocalcite 17.93%, saltpetre 2.84%, Potassium ethanoate 2.62%.
Above-mentioned inhibiter is Sodium Benzoate or thiocarbamide.
The present invention also provides a kind of preparation method of soil self-repair type environment protection snow-dissolved agent, it is characterized in that, this method may further comprise the steps:
(1) preparation treated starch: by in 1: 16~24 the mass ratio adding reactor, is 90 ℃~95 ℃ conditions under gelatinization 15min~30min in temperature with water soluble starch and distilled water; Treat to add when temperature is reduced to 80 ℃~85 ℃ Potassium Persulphate and sodium bisulfite, reaction 8min~10min, wherein the add-on of Potassium Persulphate is 1/5~2/15 of a water soluble starch quality, the add-on of sodium bisulfite is 1/10~1/15 of a water soluble starch quality; In reactor, add quality then and be 7/8~9/8 vinylformic acid of water soluble starch quality, add quality behind reaction 20min~30min and be 7/4~9/4 vinylformic acid of water soluble starch quality, reaction 40min~50min; In reactor, add Potassium Persulphate and sodium bisulfite again, reaction 10min~15min, wherein the add-on of Potassium Persulphate is 1/10~1/15 of a water soluble starch quality, the add-on of sodium bisulfite is 1/20~1/30 of a water soluble starch quality; Add quality at last and be 7/8~9/8 vinylformic acid of water soluble starch quality, stopped reaction behind reaction 40min~50min; PH value with solution behind the NaOH conditioned reaction is 7, and adding methyl alcohol, to be placed on temperature be to dry in 80 ℃~105 ℃ the baking oven to constant weight to obtain treated starch, and wherein the add-on of methyl alcohol is for regulating 2~3 times of liquor capacity after the pH value;
(2) mix Snow Agent principal goods material: with magnesium chloride, magnesium acetate, nitrocalcite, saltpetre and Potassium ethanoate by 140: 202: 82: 13: 12 mass ratio mixing obtains Snow Agent principal goods material;
(3) preparation Snow Agent: will mix Snow Agent principal goods material by 13~23 in the treated starch of preparation in the inhibiter, step (1) and the step (2): 54~95: 4500 mass ratio mixing also places reactor, add distilled water, stirring and dissolving under 80 ℃~90 ℃ constant temperature, solution after will dissolving then is 60 ℃~70 ℃ in temperature, vacuum tightness is dry 2h~4h under the condition of 0.09MPa, promptly gets Snow Agent finished product just; Just finished product is granulated that to be placed on temperature be to be dried to constant weight in 80 ℃~90 ℃ the loft drier with Snow Agent, promptly gets soil self-repair type environment protection snow-dissolved agent; Described inhibiter is Sodium Benzoate, thiocarbamide, sodium polyphosphate or zinc sulfate; The add-on of described distilled water is 1~2 times of Snow Agent principal goods material quality.
The mass concentration of NaOH is 5% described in the above-mentioned steps (1).
The mass ratio of inhibiter described in the above-mentioned steps (3), treated starch and Snow Agent principal goods material is 11: 50: 3300.
Inhibiter is Sodium Benzoate or thiocarbamide described in the above-mentioned steps (3).
The present invention compared with prior art has the following advantages:
1, the treated starch in the Snow Agent of the present invention can slow down the dissolution rate of Snow Agent self greatly under the situation that guarantees the snow melt ability.So when using this Snow Agent, Snow Agent concentration can be not too high in the formed solution of Snow Agent and snow-broth, thus guaranteed snow melt continue carry out.Snow Agent can not cause the excessive problem of Snow Agent concentration in the unit volume snow-broth yet when finishing the snow melt task like this, has strengthened the action effect of unit mass Snow Agent.In addition, owing to the acting in conjunction of inorganic and organic multiple compound makes that the use temperature scope of this Snow Agent is wider, in-5 ℃~-30 ℃ scopes, snow melt effect is preferably arranged all.
2, Snow Agent of the present invention is the combination of multiple inorganic and organic compound, the salt of diversification has effectively been avoided owing to the too high corrosion that aggravates road pavement of single salt ionic concentration in the snow-broth that melts, to soil, underground water, and vegeto-animal harm, single salt ionic concentration was up to 38% after Snow Agent of the present invention was melted snow-broth.
3, the macromole treated starch in the Snow Agent of the present invention plays the colloidal effect in soil, absorption inorganic molecules and inorganic ion, slow down its infiltration rate degree down greatly, and then, avoided Snow Agent phreatic pollution by soil microorganisms and plant metabolism degraded.
4, the magnesium ion that is contained among the present invention, calcium ion, potassium ion, nitrate ion etc. enter soil can replenish soil trace element content, improves the soil nutrient structure, promotes plant-growth.
5, slowing down of the snow melt characteristics of Snow Agent of the present invention and autolysis speed significantly reduced the salt ionic concentration that remains in the unit surface on the road surface; skeleton construction has effectively been protected in the interpolation of inhibiter simultaneously again, therefore can avoid the corrosive nature of Snow Agent to road fully.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Embodiment
Embodiment 1
(1) preparation treated starch: by in 1: 16 the mass ratio adding reactor, is 90 ℃ conditions under gelatinization 30min in temperature with water soluble starch and distilled water; Treat to add when temperature is reduced to 80 ℃ Potassium Persulphate and sodium bisulfite, reaction 10min, wherein the add-on of Potassium Persulphate is 1/5 of a water soluble starch quality, the add-on of sodium bisulfite is 1/10 of a water soluble starch quality; In reactor, add quality then and be 7/8 vinylformic acid of water soluble starch quality, add quality behind the reaction 20min and be 7/4 vinylformic acid of water soluble starch quality, reaction 40min; In reactor, add Potassium Persulphate and sodium bisulfite again, reaction 10min, wherein the add-on of Potassium Persulphate is 1/10 of a water soluble starch quality, the add-on of sodium bisulfite is 1/20 of a water soluble starch quality; Add quality at last and be 7/8 vinylformic acid of water soluble starch quality, stopped reaction behind the reaction 40min; PH value with solution behind 5% the NaOH conditioned reaction is 7, and adding methyl alcohol, to be placed on temperature be to dry in 80 ℃ the baking oven to constant weight to obtain treated starch, and wherein the add-on of methyl alcohol is for regulating 2 times of liquor capacity after the pH value;
(2) mix Snow Agent principal goods material: with magnesium chloride, magnesium acetate, nitrocalcite, saltpetre and Potassium ethanoate by 140: 202: 82: 13: 12 mass ratio mixing obtains Snow Agent principal goods material;
(3) preparation Snow Agent: will mix Snow Agent principal goods material by 13: 54: 4500 mass ratio mixing and place reactor in the treated starch of preparation in the inhibiter, step (1) and the step (2), add distilled water, stirring and dissolving under 80 ℃ of constant temperature, solution after will dissolving then is 60 ℃ in temperature, vacuum tightness is dry 4h under the condition of 0.09MPa, promptly gets Snow Agent finished product just; Just finished product is granulated that to be placed on temperature be to be dried to constant weight in 80 ℃~90 ℃ the loft drier with Snow Agent, promptly gets soil self-repair type environment protection snow-dissolved agent; Described inhibiter is a Sodium Benzoate; The add-on of described distilled water and Snow Agent principal goods material are identical in quality.
The soil self-repair type environment protection snow-dissolved agent of present embodiment preparation is made up of following raw materials by weight percent: treated starch 1.17%, inhibiter 0.3%, magnesium chloride 30.72%, magnesium acetate 44.34%, nitrocalcite 17.99%, saltpetre 2.85%, Potassium ethanoate 2.63%, wherein inhibiter is a Sodium Benzoate.
Embodiment 2
Present embodiment is identical with embodiment 1 preparation method, and wherein difference is: described inhibiter is thiocarbamide, sodium polyphosphate or zinc sulfate.
Embodiment 3
(1) preparation treated starch: by in 1: 24 the mass ratio adding reactor, is 95 ℃ conditions under gelatinization 15min in temperature with water soluble starch and distilled water; Treat to add when temperature is reduced to 85 ℃ Potassium Persulphate and sodium bisulfite, reaction 8min, wherein the add-on of Potassium Persulphate is 2/15 of a water soluble starch quality, the add-on of sodium bisulfite is 1/15 of a water soluble starch quality; In reactor, add quality then and be 9/8 vinylformic acid of water soluble starch quality, add quality behind the reaction 30min and be 9/4 vinylformic acid of water soluble starch quality, reaction 50min; In reactor, add Potassium Persulphate and sodium bisulfite again, reaction 15min, wherein the add-on of Potassium Persulphate is 1/15 of a water soluble starch quality, the add-on of sodium bisulfite is 1/30 of a water soluble starch quality; Add quality at last and be 9/8 vinylformic acid of water soluble starch quality, stopped reaction behind the reaction 50min; PH value with solution behind 5% the NaOH conditioned reaction is 7, and adding methyl alcohol, to be placed on temperature be to dry in 105 ℃ the baking oven to constant weight to obtain treated starch, and wherein the add-on of methyl alcohol is for regulating 3 times of liquor capacity after the pH value;
(2) mix Snow Agent principal goods material: with magnesium chloride, magnesium acetate, nitrocalcite, saltpetre and Potassium ethanoate by 140: 202: 82: 13: 12 mass ratio mixing obtains Snow Agent principal goods material;
(3) preparation Snow Agent: will mix Snow Agent principal goods material by 23: 95: 4500 mass ratio mixing and place reactor in the treated starch of preparation in the inhibiter, step (1) and the step (2), add distilled water, stirring and dissolving under 90 ℃ of constant temperature, solution after will dissolving then is 70 ℃ in temperature, vacuum tightness is dry 2h under the condition of 0.09MPa, promptly gets Snow Agent finished product just; Just finished product is granulated that to be placed on temperature be to be dried to constant weight in 90 ℃ the loft drier with Snow Agent, promptly gets soil self-repair type environment protection snow-dissolved agent; Described inhibiter is a thiocarbamide; The add-on of described distilled water is 2 times of Snow Agent principal goods material quality.
The soil self-repair type environment protection snow-dissolved agent of present embodiment preparation is made up of following raw materials by weight percent: treated starch 2.06%, inhibiter 0.5%, magnesium chloride 30.38%, magnesium acetate 43.85%, nitrocalcite 17.79%, saltpetre 2.82%, Potassium ethanoate 2.60%.
Embodiment 4
Present embodiment is identical with embodiment 3 preparation methods, and wherein difference is: described inhibiter is Sodium Benzoate, sodium polyphosphate or zinc sulfate.
Embodiment 5
(1) preparation treated starch: by in 1: 20 the mass ratio adding reactor, is 92 ℃ conditions under gelatinization 22min in temperature with water soluble starch and distilled water; Treat to add when temperature is reduced to 83 ℃ Potassium Persulphate and sodium bisulfite, reaction 9min, wherein the add-on of Potassium Persulphate is 1/6 of a water soluble starch quality, the add-on of sodium bisulfite is 1/12 of a water soluble starch quality; Add the vinylformic acid with quality such as water soluble starch then in reactor, adding quality behind the reaction 25min is 2 times vinylformic acid of water soluble starch quality, reaction 45min; In reactor, add Potassium Persulphate and sodium bisulfite again, reaction 12min, wherein the add-on of Potassium Persulphate is 1/12 of a water soluble starch quality, the add-on of sodium bisulfite is 1/24 of a water soluble starch quality; Add the vinylformic acid with quality such as water soluble starch at last, stopped reaction behind the reaction 45min; PH value with solution behind 0.5% the NaOH conditioned reaction is 7, and adding methyl alcohol, to be placed on temperature be to dry in 93 ℃ the baking oven to constant weight to obtain treated starch, and wherein the add-on of methyl alcohol is for regulating 2.5 times of liquor capacity after the pH value;
(2) mix Snow Agent principal goods material: with magnesium chloride, magnesium acetate, nitrocalcite, saltpetre and Potassium ethanoate by 140: 202: 82: 13: 12 mass ratio mixing obtains Snow Agent principal goods material;
(3) preparation Snow Agent: will mix Snow Agent principal goods material by 11: 50: 3300 mass ratio mixing and place reactor in the treated starch of preparation in the inhibiter, step (1) and the step (2), add distilled water, stirring and dissolving under 85 ℃ of constant temperature, solution after will dissolving then is 65 ℃ in temperature, vacuum tightness is dry 3h under the condition of 0.09MPa, promptly gets Snow Agent finished product just; Just finished product is granulated that to be placed on temperature be to be dried to constant weight in 85 ℃ the loft drier with Snow Agent, promptly gets soil self-repair type environment protection snow-dissolved agent; Described inhibiter is a sodium polyphosphate; The add-on of described distilled water is 1.5 times of Snow Agent principal goods material quality.
The soil self-repair type environment protection snow-dissolved agent of present embodiment preparation is made up of following raw materials by weight percent: treated starch 1.49%, inhibiter 0.33%, magnesium chloride 30.61%, magnesium acetate 44.18%, nitrocalcite 17.93%, saltpetre 2.84%, Potassium ethanoate 2.62%.
Embodiment 6
Present embodiment is identical with embodiment 5 preparation methods, and wherein difference is: described inhibiter is Sodium Benzoate, thiocarbamide or zinc sulfate.
Embodiment 7
(1) preparation treated starch: by in 1: 20 the mass ratio adding reactor, is 93 ℃ conditions under gelatinization 25min in temperature with water soluble starch and distilled water; Treat to add when temperature is reduced to 82 ℃ Potassium Persulphate and sodium bisulfite, reaction 9min, wherein the add-on of Potassium Persulphate is 1/6 of a water soluble starch quality, the add-on of sodium bisulfite is 1/12 of a water soluble starch quality; Add the vinylformic acid with quality such as water soluble starch then in reactor, adding quality behind the reaction 25min is 2 times vinylformic acid of water soluble starch quality, reaction 45min; In reactor, add Potassium Persulphate and sodium bisulfite again, reaction 12min, wherein the add-on of Potassium Persulphate is 1/12 of a water soluble starch quality, the add-on of sodium bisulfite is 1/24 of a water soluble starch quality; Add the vinylformic acid with quality such as water soluble starch at last, stopped reaction behind the reaction 45min; PH value with solution behind 0.5% the NaOH conditioned reaction is 7, and adding methyl alcohol, to be placed on temperature be to dry in 92 ℃ the baking oven to constant weight to obtain treated starch, and wherein the add-on of methyl alcohol is for regulating 2.5 times of liquor capacity after the pH value;
(2) mix Snow Agent principal goods material: with magnesium chloride, magnesium acetate, nitrocalcite, saltpetre and Potassium ethanoate by 140: 202: 82: 13: 12 mass ratio mixing obtains Snow Agent principal goods material;
(3) preparation Snow Agent: will mix Snow Agent principal goods material by 18: 75: 4500 mass ratio mixing and place reactor in the treated starch of preparation in the inhibiter, step (1) and the step (2), add distilled water, stirring and dissolving under 85 ℃ of constant temperature, solution after will dissolving then is 65 ℃ in temperature, vacuum tightness is dry 3h under the condition of 0.09MPa, promptly gets Snow Agent finished product just; Just finished product is granulated that to be placed on temperature be to be dried to constant weight in 85 ℃ the loft drier with Snow Agent, promptly gets soil self-repair type environment protection snow-dissolved agent; Described inhibiter is a zinc sulfate; The add-on of described distilled water is 1.5 times of Snow Agent principal goods material quality.
The soil self-repair type environment protection snow-dissolved agent of present embodiment preparation is made up of following raw materials by weight percent: treated starch 1.62%, inhibiter 0.4%, magnesium chloride 30.55%, magnesium acetate 44.10%, nitrocalcite 17.89%, saltpetre 2.83%, Potassium ethanoate 2.61%.
Embodiment 8
Present embodiment is identical with embodiment 7 preparation methods, and wherein difference is: described inhibiter is Sodium Benzoate, thiocarbamide or sodium polyphosphate.
The test of Snow Agent snow melt effect comparison:
Existing Snow Agent and soil self-repair type environment protection snow-dissolved agent of the present invention are done simultaneous test: in 11 ice chests of equal volume, add 25 milliliters distilled water respectively, place refrigerator-freezer, until water freeze all Cheng Bing.Take by weighing by formula rate and respectively to organize Snow Agent, put in the mortar, be ground to Powdered, evenly be sprinkling upon on the ice face of ice chest, the corresponding ice chest of a kind of Snow Agent places refrigerator-freezer with ice chest then, measure the water outlet volume of each ice chest after one hour, determine the ice-melt effect of Snow Agent according to its water outlet volume.Result such as following table:
Existing Snow Agent of table 1 and soil self-repair type environment protection snow-dissolved agent effect comparison
Figure BDA0000034776720000081
Figure BDA0000034776720000091
The average aquifer yield of 1-8 group number sample is 7.6ml, and high-efficient environmental protective snowmelting agent has improved 51% relatively at the snow melt aspect of performance.And 9, the 10 liang group difference chloride 60.7% and 71.6% approaching with the high-efficient environmental protective snowmelting agent aquifer yield, the high-efficient environmental protective snowmelting agent chlorinity is 23.4%.The data of consulting according to us as can be known, it is exactly chlorion that the road pavement bridge produces the corrosive major cause.High-efficient environmental protective snowmelting agent all is better than now Snow Agent on the market at aspects such as snow melt performance and environmental protection in sum.

Claims (7)

1. soil self-repair type environment protection snow-dissolved agent, it is characterized in that, this Snow Agent is made up of following raw materials by weight percent: treated starch 1.17%~2.06%, inhibiter 0.3%~0.5%, magnesium chloride 30.38%~30.72%, magnesium acetate 43.85%~44.34%, nitrocalcite 17.79%~17.99%, saltpetre 2.82%~2.85%, Potassium ethanoate 2.60%~2.63%; Described treated starch is that water soluble starch graft acrylic acid prepared forms, and described inhibiter is Sodium Benzoate, thiocarbamide, sodium polyphosphate or zinc sulfate.
2. soil self-repair type environment protection snow-dissolved agent according to claim 1, it is characterized in that, this Snow Agent is made up of following raw materials by weight percent: treated starch 1.49%, inhibiter 0.33%, magnesium chloride 30.61%, magnesium acetate 44.18%, nitrocalcite 17.93%, saltpetre 2.84%, Potassium ethanoate 2.62%.
3. soil self-repair type environment protection snow-dissolved agent according to claim 1 is characterized in that described inhibiter is Sodium Benzoate or thiocarbamide.
4. prepare the method for soil self-repair type environment protection snow-dissolved agent as claimed in claim 1 or 2, it is characterized in that, this method may further comprise the steps:
(1) preparation treated starch: by in 1: 16~24 the mass ratio adding reactor, is 90 ℃~95 ℃ conditions under gelatinization 15min~30min in temperature with water soluble starch and distilled water; Treat to add when temperature is reduced to 80 ℃~85 ℃ Potassium Persulphate and sodium bisulfite, reaction 8min~10min, wherein the add-on of Potassium Persulphate is 1/5~2/15 of a water soluble starch quality, the add-on of sodium bisulfite is 1/10~1/15 of a water soluble starch quality; In reactor, add quality then and be 7/8~9/8 vinylformic acid of water soluble starch quality, add quality behind reaction 20min~30min and be 7/4~9/4 vinylformic acid of water soluble starch quality, reaction 40min~50min; In reactor, add Potassium Persulphate and sodium bisulfite again, reaction 10min~15min, wherein the add-on of Potassium Persulphate is 1/10~1/15 of a water soluble starch quality, the add-on of sodium bisulfite is 1/20~1/30 of a water soluble starch quality; Add quality at last and be 7/8~9/8 vinylformic acid of water soluble starch quality, stopped reaction behind reaction 40min~50min; PH value with solution behind the NaOH conditioned reaction is 7, and adding methyl alcohol, to be placed on temperature be to dry in 80 ℃~105 ℃ the baking oven to constant weight to obtain treated starch, and wherein the add-on of methyl alcohol is for regulating 2~3 times of liquor capacity after the pH value;
(2) mix Snow Agent principal goods material: with magnesium chloride, magnesium acetate, nitrocalcite, saltpetre and Potassium ethanoate by 140: 202: 82: 13: 12 mass ratio mixing obtains Snow Agent principal goods material;
(3) preparation Snow Agent: will mix Snow Agent principal goods material by 13~23 in the treated starch of preparation in the inhibiter, step (1) and the step (2): 54~95: 4500 mass ratio mixing also places reactor, add distilled water, stirring and dissolving under 80 ℃~90 ℃ constant temperature, solution after will dissolving then is 60 ℃~70 ℃ in temperature, vacuum tightness is dry 2h~4h under the condition of 0.09MPa, promptly gets Snow Agent finished product just; Just finished product is granulated that to be placed on temperature be to be dried to constant weight in 80 ℃~90 ℃ the loft drier with Snow Agent, promptly gets soil self-repair type environment protection snow-dissolved agent; Described inhibiter is Sodium Benzoate, thiocarbamide, sodium polyphosphate or zinc sulfate; The add-on of described distilled water is 1~2 times of Snow Agent principal goods material quality.
5. the preparation method of soil self-repair type environment protection snow-dissolved agent according to claim 4 is characterized in that, the mass concentration of NaOH is 5% described in the step (1).
6. the preparation method of soil self-repair type environment protection snow-dissolved agent according to claim 4 is characterized in that, the mass ratio of inhibiter described in the step (3), treated starch and Snow Agent principal goods material is 11: 50: 3300.
7. the preparation method of soil self-repair type environment protection snow-dissolved agent according to claim 4 is characterized in that, inhibiter is Sodium Benzoate or thiocarbamide described in the step (3).
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CN103342988B (en) * 2013-07-04 2014-08-13 沈阳工业大学 Environment-friendly snow melting agent and preparation method thereof
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