CN104650811A - Environment-friendly snow melting agent and preparation method thereof - Google Patents
Environment-friendly snow melting agent and preparation method thereof Download PDFInfo
- Publication number
- CN104650811A CN104650811A CN201510090776.1A CN201510090776A CN104650811A CN 104650811 A CN104650811 A CN 104650811A CN 201510090776 A CN201510090776 A CN 201510090776A CN 104650811 A CN104650811 A CN 104650811A
- Authority
- CN
- China
- Prior art keywords
- friendly type
- environment friendly
- snow melt
- biomass charcoal
- snow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Landscapes
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
The invention discloses an environment-friendly snow melting agent and a preparation method thereof. The snow melting agent consists of the following materials in percentage by weight: 40-50% of organic acid salt, 30-40% of biomass charcoal, 1.5-2% of diammonium hydrogen phosphate, 5-12% of urea, 4-6% of silicate and 2-5% of hydroxyl cellulose. The preparation method of the environment-friendly snow melting agent comprises the following steps: a, mixing the organic acid salt, diammonium hydrogen phosphate, urea and silicate uniformly according to the percentage; b, adding the biomass charcoal according to the percentage and stirring uniformly; c, adding the hydroxyl cellulose according to the percentage and stirring uniformly; and d, extruding the mixture into 6-8mm granules, and drying to obtain the environment-friendly snow melting agent. The snow melting agent has the advantages: 1, the snow melting speed is high, the snow melting effect is good, and the range of applicable temperature is wide; and 2, after the biomass charcoal is added, solar energy can be absorbed to provide energy for melting snow.
Description
Technical field
The present invention relates to a kind of Snow Agent and preparation method thereof, in particular, the present invention relates to and a kind of there is environment friendly type snow melt agent of good Thaw performance and preparation method thereof.
Background technology
Snow Agent as its name suggests, its effect is deicing or snow melting, replace salt mainly as the snow-removing and ice-thawing of the facilities such as urban road, motorway, airport, harbour, bridge, some Snow Agent also can be used as the quick melting agent of construction work winter construction ice dissolution and antifreezing admixture etc.
Due to containing chlorion and sodium salt, usually can there is following defect in traditional Snow Agent, farmland, the greening of harm farmland, green belt road both sides bring destructive strike; Shorten road life, cause big area road surface breakage, strengthen roadupkeep difficulty; Contaminate environment, causes groundwater resource to pollute, and eats and can be produced serious harm to HUMAN HEALTH by the water that Snow Agent is polluted.Because Industrial Salt does not use standard, Industrial Salt is many there will be chronic poisoning containing nitrite after people drinks, if amount greatly can causing death.
Although the Snow Agent also had is not containing chlorion and sodium salt.Main component is ethylene glycol, glycerol etc., and the alcohols such as ethylene glycol, glycerol Snow Agent enters a large amount of oxygen of water body decomposition and consumption, and chemical oxygen demand exceeds standard.
Some Snow Agent cost is higher, not easily spreading, there will be homogeneity and is difficult to control, and consumption bad control especially, and spreading speed is very slow especially.
Therefore, a kind of both had good snow melt effect, the environment friendly type snow melt agent of obvious road improvement Soil Surrounding can will receive market widespread demand again.
Summary of the invention
One object of the present invention is to provide one to have good Thaw performance, again environment is not produced to the Snow Agent of harm simultaneously.
A further object of the invention is to provide a kind of Snow Agent, and it significantly can improve soil.
A further object of the invention is to provide a kind of Snow Agent, its growth elements that the plant of N P and K can be provided necessary, and soil can be made more fertile.
For achieving the above object, a kind of environment friendly type snow melt agent of the present invention, is made up of as following weight percent following material: organic acid salt 40 ~ 50%, biomass charcoal 30 ~ 40%, Secondary ammonium phosphate 1.5 ~ 2%, urea 5 ~ 12%, silicate 4 ~ 6% and hydroxylated cellulose 2 ~ 5%.
Preferably, be made up of as following weight percent following material: organic acid salt 48%, biomass charcoal 36%, Secondary ammonium phosphate 1.8%, urea 6%, silicate 5% and hydroxylated cellulose 3.2%.
Preferably, wherein said organic acid salt is one or more in the calcium salt of formic acid or acetic acid, sylvite, magnesium salts.
Preferably, the granularity of described biomass charcoal is 20-150 order.
For the preparation of a preparation method for above-mentioned environment friendly type snow melt agent, comprise the following steps:
A, organic acid salt, Secondary ammonium phosphate, urea, silicate to be stirred according to described percentage mix;
B, add biomass charcoal according to described per-cent again, stir;
C, add hydroxylated cellulose according to described per-cent again, stir;
D, be squeezed into the particle of 6-8mm, obtained described environment friendly type snow melt agent.
Preferably, organic acid salt described in step a is one or more in the calcium salt of formic acid or acetic acid, sylvite, magnesium salts.
Preferably, the granularity of biomass charcoal described in step b is 20-150 order.
The invention has the beneficial effects as follows: 1, Snow-melting speed is fast, and snow melt is effective, and the scope of Applicable temperature is wide; 2, after adding biomass charcoal, can sun power be absorbed, for snow melt provides energy, and there is adsorptivity due to gac, make action time longer; 3, owing to can fertilize the soil containing elements such as nitrogen, phosphorus, potassium and magnesium in Snow Agent, and containing biomass charcoal, effectively can improve soil, and retain the toxic organic compound in soil; 4, road pavement bridge degree of corrosion is low, to biological non-toxicity; 5, add gac and can effectively prevent Snow Agent deliquescence; 6, reduce production cost, there is good economic benefit.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
Embodiment 1
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 48% (potassium formiate 28%, magnesium acetate 20%), biomass charcoal 36%, Secondary ammonium phosphate 1.8%, urea 6%, silicate 5% and hydroxylated cellulose 3.2%.
Embodiment 2
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 40% (Potassium ethanoate 30%, calcium acetate 10%), biomass charcoal 40%, Secondary ammonium phosphate 1.5%, urea 12%, silicate 4% and hydroxylated cellulose 2.5%.
Embodiment 3
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 50% (Potassium ethanoate 30%, potassium formiate 20%), biomass charcoal 30%, Secondary ammonium phosphate 2%, urea 12%, silicate 4% and hydroxylated cellulose 2%.
Embodiment 4
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 45% (potassium formiate 25%, magnesium formiate 5%, calcium formiate 10%, magnesium acetate 5%), biomass charcoal 37.2%, Secondary ammonium phosphate 1.8%, urea 5%, silicate 6% and hydroxylated cellulose 5%.
Embodiment 5
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 42% (Potassium ethanoate 17, magnesium acetate 5%, calcium acetate 10%, calcium formiate 10%), biomass charcoal 39.9%, Secondary ammonium phosphate 1.6%, urea 8%, silicate 5% and hydroxylated cellulose 3.5%.
Embodiment 6
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 45% (magnesium acetate 25%, calcium acetate 20%), biomass charcoal 36%, Secondary ammonium phosphate 1.6%, urea 8%, silicate 5% and hydroxylated cellulose 4.4%.
Embodiment 7
A kind of environment friendly type snow melt agent, is made up of according to following weight percent following material:
Organic acid salt 45% (potassium formiate 45%), biomass charcoal 32%, Secondary ammonium phosphate 1.6%, urea 11%, silicate 6% and hydroxylated cellulose 4.4%.
Comparative example 1
Be made up of according to following weight percent following material:
Organic acid salt 80% (potassium formiate 80%), Secondary ammonium phosphate 1.8%, urea 10%, silicate 5% and hydroxylated cellulose 3.2%.
Comparative example 2
Be made up of according to following weight percent following material:
Organic acid salt 29% (potassium formiate 29%), Secondary ammonium phosphate 1.8%, urea 61%, silicate 5% and hydroxylated cellulose 3.2%.
For the preparation of a preparation method for above-mentioned environment friendly type snow melt agent, comprise the following steps:
A, by organic acid salt, (wherein said organic acid salt is one or more in the calcium salt of formic acid or acetic acid, sylvite, magnesium salts.), Secondary ammonium phosphate, urea, silicate is placed in stirrer according to described per-cent, normal temperature moderate-speed mixer 20 minutes, makes it mix;
B, add biomass charcoal (granularity of biomass charcoal is 20-150 order) according to described per-cent again, normal temperature moderate-speed mixer 30 minutes, makes it mix;
C, add hydroxylated cellulose according to described per-cent again, normal temperature high-speed stirring 10 minutes, makes it mix;
D, be squeezed into the particle of 6-8mm, obtained described environment friendly type snow melt agent.
Principle of the present invention is the blackness absorption sun power utilizing biomass charcoal, utilizes organic acid salt reduce the melting temperature of snow thus reach the object of snow melt simultaneously.Utilize the strong adsorptivity of biomass charcoal simultaneously, preserve the trace element in soil, avoid it to run off; Therefore the environment friendly type snow melt agent that prepared by the present invention can be used for the snow removing of large-area farmland.
Performance test
One, Snow Agent snow melt ability
In the present invention, the detection method of Snow Agent snow melt ability follows GB GB/T23851-2009, and method is as follows:
By the Snow Agent of 200 ± 0.1g, be placed in the Snow Agent solution that 400 are mixed with 1000ml.
Getting the porcelain crucible of two 150ML same diameter and height, add 100ML water, being placed in the permanent case of low temperature of-10 DEG C ± 1 DEG C to freezing.Pipette 25ML Snow Agent solution and 25ML sodium chloride solution, move in 50ML beaker respectively, be placed in the permanent case of low temperature of-10 DEG C ± 1 DEG C, for subsequent use after 12 hours.From the permanent case of low temperature, take out the porcelain crucible with ice cube, dry water and the ice of outer wall, weigh rapidly, be accurate to 0.1g.Being poured into rapidly by the Snow Agent solution of preparation fills in the porcelain crucible of ice cube, then puts back in the permanent case of low temperature.Take out this porcelain crucible after 0.5 hour, topple over its liquid immediately, and weigh rapidly the quality of beaker and residue ice cube.The operation steps of sodium chloride solution is with the operation steps of Snow Agent solution.
Calculation result:
Deicing or snow melting ability is in w1, and numerical value represents with %, by below formulae discovery:
w＝(m
0-m
1)/(m
0′-m
1′)
In formula:
M
0-not adding the beaker of Snow Agent solution and the numerical value of ice cube quality, unit is gram (g);
M
0'-do not add sodium chloride solution beaker and the numerical value of ice cube quality, unit is gram (g);
M
1-adding the beaker of Snow Agent solution and the numerical value of residue ice cube quality, unit is gram (g);
M
1'-adds the beaker of sodium chloride solution and the numerical value of residue ice cube quality, and unit is gram (g).
According to this standard, deicing or snow melting ability be greater than 100% namely show stronger than the deicing or snow melting ability of NaCl.Record through test:
Table one, deicing or snow melting ability
| Project | Deicing or snow melting ability |
| Embodiment 1 | 117 |
| Embodiment 2 | 118 |
| Embodiment 3 | 112 |
| Embodiment 4 | 108 |
| Embodiment 5 | 105 |
| Comparative example 1 | 111 |
| Comparative example 2 | 86 |
As shown in Table 1, deicing or snow melting ability/(g/min) of embodiment 1-5 is higher than equal sodium-chlor, and the present invention has good deicing or snow melting ability as can be seen here.As can be seen from comparative example 1, when the usage quantity of organic salt is greater than protection scope of the present invention, the increase of its deicing or snow melting ability is also not obvious, but a large amount of use organic salt can cause production cost too high, is not suitable for production; When can find out by comparative example 2 scope that the content when organic salt will protect lower than the present invention, its deicing or snow melting ability obviously declines, and can not reach the effect of good deicing or snow melting.
Two, corrosion of carbon steel rate test
The detection method of medium carbon steel corrosion rate test of the present invention follows GB GB/T23851-2009, records through experiment:
Table two, corrosion of carbon steel rate are tested
| Project | Corrosion of carbon steel rate (mm/a) |
| Embodiment 1 | 0.0037 |
| Embodiment 2 | 0.0045 |
| Embodiment 3 | 0.0051 |
| Embodiment 4 | 0.0033 |
| Embodiment 5 | 0.0036 |
| Sodium-chlor | 0.2254 |
| Comparative example 1 | 0.0087 |
| Comparative example 2 | 0.0189 |
As shown in Table 2, the corrosion of carbon steel rate (mm/a) of embodiment 1-5 is all better than sodium-chlor, and the present invention has good preservative effect as can be seen here.As can be seen from comparative example 1 and comparative example 2, when the usage quantity of organic salt is greater than or less than the scope that the present invention will protect, its corrosion of carbon steel rate obviously increases.
Three, plant salt tolerance experiment
Plant salt tolerance experiment of the present invention, carry out according to Beijing provincial standard DB11/T161-2002, test method is as follows:
Be evaluate herbaceous plant with winter wheat, draw 2m
2× 5, measure 10g/m at every turn
2, once in a week, until the mislead fountain height before the phenomenon that occurs being injured is salt tolerant amount, with g/m
2represent, test-results is as follows:
Table three, plant salt tolerance are tested
| Project | Salt tolerant amount (g/m 2) |
| Embodiment 1 | 400 |
| Embodiment 2 | 360 |
| Embodiment 3 | 420 |
| Embodiment 4 | 400 |
| Embodiment 5 | 408 |
| Sodium-chlor | 60 |
| Comparative example 1 | 180 |
| Comparative example 2 | 220 |
As shown in Table 3, the plant salt resistant character of embodiment 1-5 and comparative example 1 and comparative example 2 is all better than sodium-chlor, but as can be seen from list data, the plant salt tolerance of Snow Agent of the present invention is obviously better than comparative example 1 and comparative example 2.
As can be seen from table one, table two and table three, environment friendly type snow melt agent of the present invention has good deicing or snow melting ability, less corrosion of carbon steel rate and good plant salt resistant character.Therefore the present invention is due to other similar-type products on deicing or snow melting ability, corrosion of carbon steel rate and plant salt resistant character, and decreases the usage quantity of organic salt, when ensureing useful performance, again reduces production cost.
Although embodiment of the present invention are open as above, but it is not restricted to listed in bright book and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details.
Claims (7)
1. an environment friendly type snow melt agent, described environment friendly type snow melt agent is made up of as following weight percent following material: organic acid salt 40 ~ 50%, biomass charcoal 30 ~ 40%, Secondary ammonium phosphate 1.5 ~ 2%, urea 5 ~ 12%, silicate 4 ~ 6% and hydroxylated cellulose 2 ~ 5%.
2. environment friendly type snow melt agent according to claim 1, is made up of as following weight percent following material: organic acid salt 48%, biomass charcoal 36%, Secondary ammonium phosphate 1.8%, urea 6%, silicate 5% and hydroxylated cellulose 3.2%.
3. environment friendly type snow melt agent according to claim 2, wherein said organic acid salt is one or more in the calcium salt of formic acid or acetic acid, sylvite, magnesium salts.
4. environment friendly type snow melt agent according to claim 2, the granularity of described biomass charcoal is 20-150 order.
5., for the preparation of a preparation method for the environment friendly type snow melt agent as described in any one of Claims 1 to 4, said method comprising the steps of:
A, organic acid salt, Secondary ammonium phosphate, urea, silicate to be stirred according to described percentage mix;
B, add biomass charcoal according to described per-cent again, stir;
C, add hydroxylated cellulose according to described per-cent again, stir;
D, be squeezed into the particle of 6-8mm, obtained described environment friendly type snow melt agent.
6. according to the preparation method of the environment friendly type snow melt agent described in claim 5, wherein, organic acid salt described in step a is one or more in the calcium salt of formic acid or acetic acid, sylvite, magnesium salts.
7. according to the preparation method of the environment friendly type snow melt agent described in claim 5, wherein, the granularity of biomass charcoal described in step b is 20-150 order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090776.1A CN104650811B (en) | 2015-02-28 | 2015-02-28 | A kind of environment friendly type snow melt agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090776.1A CN104650811B (en) | 2015-02-28 | 2015-02-28 | A kind of environment friendly type snow melt agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104650811A true CN104650811A (en) | 2015-05-27 |
| CN104650811B CN104650811B (en) | 2016-09-14 |
Family
ID=53242470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510090776.1A Active CN104650811B (en) | 2015-02-28 | 2015-02-28 | A kind of environment friendly type snow melt agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104650811B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105028007A (en) * | 2015-07-02 | 2015-11-11 | 辽宁石油化工大学 | Method for relieving snow-melting agent stress to plant through combined treatment of calcium salt composite salicylic acid and charcoal |
| CN105542716A (en) * | 2016-02-17 | 2016-05-04 | 广西大学 | Environment-friendly snow quick melting agent and preparing method thereof |
| CN106065345A (en) * | 2016-02-26 | 2016-11-02 | 国电康能科技股份有限公司 | A kind of modified environment-friendly charcoal and its preparation method and application |
| CN110964484A (en) * | 2019-11-22 | 2020-04-07 | 吉林大学 | Environment-friendly snow-melting anti-skid particle |
| CN114214034A (en) * | 2022-01-04 | 2022-03-22 | 煤炭科学技术研究院有限公司 | Liquid snow-melting agent and preparation method, use method and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634842B (en) * | 2016-12-26 | 2019-01-11 | 河北建筑工程学院 | A kind of low-corrosiveness environment-friendly type composite non-slip deicing salt and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671541A (en) * | 2009-10-28 | 2010-03-17 | 交通部科学研究院 | Environment-friendly snow melt agent |
| CN101691480A (en) * | 2009-10-28 | 2010-04-07 | 交通部科学研究院 | Environment friendly type snow melt agent |
| CN101928549A (en) * | 2009-06-18 | 2010-12-29 | 赵欣 | Environmentally friendly snow melting agent and preparation method thereof |
-
2015
- 2015-02-28 CN CN201510090776.1A patent/CN104650811B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928549A (en) * | 2009-06-18 | 2010-12-29 | 赵欣 | Environmentally friendly snow melting agent and preparation method thereof |
| CN101671541A (en) * | 2009-10-28 | 2010-03-17 | 交通部科学研究院 | Environment-friendly snow melt agent |
| CN101691480A (en) * | 2009-10-28 | 2010-04-07 | 交通部科学研究院 | Environment friendly type snow melt agent |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105028007A (en) * | 2015-07-02 | 2015-11-11 | 辽宁石油化工大学 | Method for relieving snow-melting agent stress to plant through combined treatment of calcium salt composite salicylic acid and charcoal |
| CN105542716A (en) * | 2016-02-17 | 2016-05-04 | 广西大学 | Environment-friendly snow quick melting agent and preparing method thereof |
| CN106065345A (en) * | 2016-02-26 | 2016-11-02 | 国电康能科技股份有限公司 | A kind of modified environment-friendly charcoal and its preparation method and application |
| CN106065345B (en) * | 2016-02-26 | 2019-01-15 | 国电康能科技股份有限公司 | A kind of modified environment-friendly charcoal and its preparation method and application |
| CN110964484A (en) * | 2019-11-22 | 2020-04-07 | 吉林大学 | Environment-friendly snow-melting anti-skid particle |
| CN110964484B (en) * | 2019-11-22 | 2021-04-20 | 吉林大学 | Environment-friendly snow-melting anti-skid particle |
| CN114214034A (en) * | 2022-01-04 | 2022-03-22 | 煤炭科学技术研究院有限公司 | Liquid snow-melting agent and preparation method, use method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104650811B (en) | 2016-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104650811A (en) | Environment-friendly snow melting agent and preparation method thereof | |
| CN102031089B (en) | Non-chlorine environmentally-friendly snow melting agent | |
| CN102925162B (en) | Multi-effect soil conditioner and preparation method thereof | |
| CN104774592B (en) | Freeze proof material of a kind of spacetabs type for bituminous paving and preparation method thereof | |
| CN110845991B (en) | Ecological environment-friendly snow-melting material, preparation method and prepared ecological environment-friendly snow-melting agent | |
| CN104719116A (en) | Artificial soil matrix and preparation method and application for artificial soil matrix | |
| CN102899004A (en) | Green environment-friendly snow-melting liquid and preparation method thereof | |
| CN106866230A (en) | A kind of sow grass seeds by duster matrix and preparation method thereof green again suitable for arid and semi-arid area soil property bare side sloping | |
| CN111748319A (en) | Snow-melting agent | |
| CN102002341B (en) | Soil self-repairing type environmentally-friendly snow melting agent and preparation method thereof | |
| CN101417904B (en) | Weathered coal soil salinization modifying agent and preparation method thereof | |
| CN103436237A (en) | Liquid environment-friendly snow-melting agent | |
| CN104355984A (en) | Preparation process and application of calcium magnesium acetate | |
| CN101118790A (en) | Ion resistance reducing agent | |
| CN109486225A (en) | The freeze proof material of powder-type, the moisture-proof membrane material of sustained release for bituminous pavement and preparation method thereof | |
| CN111793468A (en) | Composite ice melting and snow removing agent | |
| CN111704891A (en) | Composite ice and snow fast melting agent | |
| CN111763497A (en) | Ice and snow fast melting agent | |
| CN111253911B (en) | Environment-friendly composite snow-melting material and preparation method thereof | |
| CN105622286A (en) | Water-retention sand-fixing material and preparation method and application thereof | |
| CN106634842A (en) | Low-corrosivity environmentally-friendly compound antiskid snow-melting agent and preparation method thereof | |
| CN110511725A (en) | Ice and snow melting agent and preparation method thereof is removed with environment-friendly type for a kind of scenic spot | |
| CN1618916A (en) | Composite ice melting and snow removing agent | |
| CN105349101A (en) | Environmental protection snow melting agent and preparation method therefor | |
| CN111944486B (en) | Saccharide mixture and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |