阅读说明：本技术 一种环保型融雪剂及其制备方法 (Environment-friendly snow-melting agent and preparation method thereof ) 是由 姚国友 西梦平 石小成 金鑫 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种环保型融雪剂及其制备方法,融雪剂按重量份数,组分包括：丙二醇7-10份、乙醇4-6份、醋酸钾6-8份、去离子水60-90份、六偏磷酸钠0.05-0.15份、磷酸二氢钠0.25-0.4份、葡萄糖酸钠0.6-0.8份,本发明公开的融雪剂依靠冰点下降剂之间的协同作用达到1+1＞2的效果,融雪速度快,用量少,生产成本低；本发明环保型融雪剂不包含有腐蚀金属的氯离子,减少了对路面、公共设施、金属、水泥、土壤、绿化植物及水体生态环境的腐蚀性；本发明具有较低的冰点,冰雪融化后以液态水流走而不会在道路上结冰。(The invention discloses an environment-friendly snow-melting agent and a preparation method thereof, wherein the snow-melting agent comprises the following components in parts by weight: 7-10 parts of propylene glycol, 4-6 parts of ethanol, 6-8 parts of potassium acetate, 60-90 parts of deionized water, 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate and 0.6-0.8 part of sodium gluconate, the snow-melting agent disclosed by the invention achieves the effect that 1+1 is more than 2 by virtue of the synergistic effect between freezing point depressing agents, and has the advantages of high snow-melting speed, small using amount and low production cost; the environment-friendly snow-melting agent does not contain chloride ions which corrode metal, so that the corrosivity to pavement, public facilities, metal, cement, soil, greening plants and water ecological environment is reduced; the invention has lower freezing point, and ice and snow can flow away in liquid water after melting and can not be frozen on roads.)

1. The environment-friendly snow-melting agent is characterized by comprising the following components in parts by weight: 7-10 parts of propylene glycol, 4-6 parts of ethanol, 6-8 parts of potassium acetate and 60-90 parts of deionized water.

2. The environment-friendly snow melt agent as claimed in claim 1, wherein: the snow-melting agent also comprises the following components in parts by weight: 8-10 parts of propylene glycol and 75-85 parts of deionized water.

3. The environment-friendly snow melt agent as claimed in claim 1 or 2, wherein: the corrosion inhibitor also comprises a corrosion inhibitor, wherein the corrosion inhibitor comprises sodium hexametaphosphate.

4. The environment-friendly snow melt agent as claimed in claim 3, wherein: the corrosion inhibitor component also comprises sodium dihydrogen phosphate.

5. The environment-friendly snow melt agent as claimed in claim 4, wherein: the corrosion inhibitor component also comprises sodium gluconate.

6. The environment-friendly snow melt agent as claimed in claim 5, wherein: the corrosion inhibitor comprises the following components in parts by weight: 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate and 0.6-0.8 part of sodium gluconate.

7. An environment-friendly snow-melting agent, the preparation method comprises the following steps:

s1, adding deionized water into a container, adding potassium acetate, sodium hexametaphosphate, sodium dihydrogen phosphate and sodium gluconate, and stirring until the solid is dissolved in the deionized water;

and S2, adding propylene glycol and ethanol, and stirring to uniformly mix the two solutions.

8. The environment-friendly snow melt agent as claimed in claim 7, wherein: in S1, the weight portions are as follows: 6-8 parts of potassium acetate, 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate, 0.6-0.8 part of sodium gluconate and 60-90 parts of deionized water.

9. The environment-friendly snow melt agent as claimed in claim 7, wherein: in S2, the weight portions are as follows: 7-10 parts of propylene glycol and 4-6 parts of ethanol.

Technical Field

The invention relates to a snow-melting agent, in particular to an environment-friendly snow-melting agent.

Background

At present, snow melting agents developed in China are various and are divided into solid and liquid according to the physical state; the snow melting agent comprises inorganic substances and a mixture of inorganic substances and organic substances according to the composition, wherein the mixture of the inorganic substances and the organic substances is more, and the environment-friendly snow melting agent is a mixture of chemicals which do not contain or contain less chlorine; the method can also be classified according to different purposes, generally has lower quality when being used for urban roads, has higher quality requirements when being used for places such as bridges, airports and the like, but the quality of the method is required to meet the standard.

The chlorine salt snow-melting agent is widely applied to snow and ice removal in facilities such as urban roads, expressways, airports, ports, bridges and the like in China, but the residues of most of the snow-melting agents used at present can corrode road surfaces and rubber tires of automobiles, damage concrete members and bridge facilities, damage flowers, plants, trees, crops and animals and damage human health. Therefore, in northern China, the method of removing ice and snow on the road surface by taking sandy soil and a snow scraper as main materials and taking a snow melting agent as an auxiliary material is still adopted so far, and the smooth traffic is further ensured. Therefore, how to prepare the snow-melting agent which has excellent snow-melting capability, does not damage roads, concrete members and bridge facilities, does not damage flowers, trees, crops and animals and does not damage human bodies is a problem which needs to be solved urgently in the current market.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide an environment-friendly snow-melting agent which has the advantages of high snow-melting speed, small dosage, low use cost and no harm to road surfaces, green plants and public facilities.

Because the propylene glycol has low freezing point, almost no toxicity, good stability and small corrosiveness, the components are organic micromolecules, the propylene glycol is very easy to degrade in the nature, and the pollution to the soil water body is small, so from biodegradation analysis, when snow water flows into a wastewater treatment plant from a sewer, the propylene glycol can also be biodegraded in the wastewater treatment plant. And has good snow melting performance, so that propylene glycol is used as a freezing point depressant of the snow melting agent. However, due to the high price, on the premise of ensuring low cost and snow melting effect according to the research foundation of the predecessor, the amount of the propylene glycol is set to be less than 10%, but the addition amount of a single freezing point depressant is small, so that the freezing point is not lowered, potassium acetate and ethanol are added to assist in freezing point depression, and the synergistic effect of the freezing point depressants is relied on to achieve the effect of 1+1 > 2. According to the high antifreezing effect and the price characteristic of the potassium acetate, the content of the potassium acetate is determined to be 8 percent at most; the ethanol has the characteristics of low freezing point, volatility, flammability and the like, so the dosage of the ethanol is set to be less than 6%; with the development of industry, substances in the air are not clean, and the snow which looks white also contains a large amount of impurities such as nitrides, trace harmful substances and trace corrosive components, so that sodium hexametaphosphate, sodium dihydrogen phosphate and sodium gluconate are selected as combined corrosion inhibitors, and the damage of the harmful substances dissolved in snow water to concrete, carbon steel corrosion and green plants is reduced or slowed down while snow is melted.

One of the technical schemes adopted by the invention is as follows: an environment-friendly snow-melting agent comprises the following components in parts by weight: 7-10 parts of propylene glycol, 4-6 parts of ethanol, 6-8 parts of potassium acetate and 60-90 parts of deionized water.

Preferably, the snow-melting agent further comprises the following components in parts by weight: 8-10 parts of propylene glycol and 75-85 parts of deionized water.

Preferably, the snow melt agent component further comprises a corrosion inhibitor, the corrosion inhibitor component comprising sodium hexametaphosphate.

Preferably, the corrosion inhibitor component further comprises sodium dihydrogen phosphate.

Preferably, the corrosion inhibitor component further comprises sodium gluconate.

Preferably, the corrosion inhibitor comprises the following components in parts by weight: 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate and 0.6-0.8 part of sodium gluconate.

An environment-friendly snow-melting agent, the preparation method comprises the following steps:

s1, adding deionized water into a container, adding potassium acetate, sodium hexametaphosphate, sodium dihydrogen phosphate and sodium gluconate, and stirring until the solid is dissolved in the deionized water;

and S2, adding propylene glycol and ethanol, and stirring to completely and uniformly mix the two solutions.

Preferably, in S1, by weight: 6-8 parts of potassium acetate, 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate, 0.6-0.8 part of sodium gluconate and 60-90 parts of deionized water.

Preferably, in S2, by weight: 7-10 parts of propylene glycol and 4-6 parts of ethanol.

The invention has the beneficial effects that:

1) the snow-melting agent disclosed by the invention achieves the effect that 1+1 is more than 2 by virtue of the synergistic effect of the freezing point depressing agents, and has the advantages of low freezing point, high snow-melting speed, small using amount and low production cost.

2) The environment-friendly snow-melting agent does not contain chloride ions which corrode metals, reduces corrosivity to pavements, public facilities, metals, cement, soil, greening plants and water ecological environments, and solves the bottleneck problems of corrosion and environment protection of the traditional snow-melting mode from the source.

3) By adding the corrosion inhibitor, the damage of harmful substances dissolved in snow water to concrete and carbon steel corrosion and greening plants can be reduced or slowed down while snow is melted.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise specified, are obtained from conventional commercial sources and all preparative operations are carried out at room temperature and atmospheric pressure; preferred embodiments of the present invention will be described in detail below.

The environment-friendly snow-melting agent comprises the following components in parts by weight: 7-10 parts of propylene glycol, 4-6 parts of ethanol, 6-8 parts of potassium acetate, 60-90 parts of deionized water, 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate and 0.6-0.8 part of sodium gluconate.

The snow-melting agent is prepared by the following method, adding 60-90 parts of deionized water into a container, adding 6-8 parts of potassium acetate, 0.05-0.15 part of sodium hexametaphosphate, 0.25-0.4 part of sodium dihydrogen phosphate and 0.6-0.8 part of sodium gluconate, and stirring until the solid is completely dissolved in the deionized water; then adding 7-10 parts of propylene glycol and 4-6 parts of ethanol, and fully stirring to completely and uniformly mix the two solutions.

The propylene glycol, the ethanol, the potassium acetate, the sodium hexametaphosphate, the sodium dihydrogen phosphate and the sodium gluconate are all industrial products

Example 1:

adding 80.7 parts of deionized water into a production cylinder, adding 6 parts of potassium acetate, 0.15 part of sodium hexametaphosphate, 0.35 part of sodium dihydrogen phosphate and 0.8 part of sodium gluconate while stirring, and stirring at room temperature until the solid is completely dissolved in the deionized water; then 8 parts of propylene glycol and 4 parts of ethanol are added and fully stirred to ensure that the two solutions are completely and uniformly mixed.

Example 2:

According to the invention, the composite freezing point depressant is used, and the effect that 1+1 is more than 2 is achieved by virtue of the synergistic effect between the freezing point depressants, so that the following 6 groups of proportion are prepared according to the preparation method of the embodiment 1, the components and the content of each group of comparative examples are shown in table 1, the freezing point obtained by each group of comparative examples is shown in table 1, and the experimental data in table 1 can show that when three freezing point depressants, namely propylene glycol, potassium acetate and ethanol are simultaneously added into the snow melting agent, the freezing point is lowest, and the effect that 1+1 is more than 2 is achieved.

Example 3

A preparation method of a high-quality non-chlorine environment-friendly snow-melting agent comprises the following raw materials in parts by mass: 9 parts of propylene glycol, 5 parts of ethanol, 7 parts of potassium acetate, 77.9 parts of deionized water, 0.1 part of sodium hexametaphosphate, 0.3 part of sodium dihydrogen phosphate and 0.7 part of sodium gluconate, and the preparation method is the same as that of example 1.

Example 4

A preparation method of a high-quality non-chlorine environment-friendly snow-melting agent comprises the following raw materials in parts by mass: 10 parts of propylene glycol, 6 parts of ethanol, 8 parts of potassium acetate, 75.1 parts of deionized water, 0.05 part of sodium hexametaphosphate, 0.25 part of sodium dihydrogen phosphate and 0.6 part of sodium gluconate, and the preparation method is the same as that of example 1.

Example 5

The snow-melting agents obtained in example 1, example 3 and example 4 were subjected to a relative snow-melting and deicing capability, a concrete corrosion test and a metal carbon steel corrosion test according to national standards, wherein specific experiments refer to the following experimental procedures, and specific detection results are shown in table 2 below.

1) And freezing point test:

100mL of the snow-melting agent solutions obtained in example 1, example 3 and example 4 were added to 3 200mL beakers; inserting a thermometer into the snow-melting agent solution, placing the solution in a low-temperature incubator, recording the change of the temperature of the snow-melting agent solution along with time, and drawing a temperature-time curve, wherein the corresponding temperature at the gentle part of the curve is the freezing point temperature of the snow-melting agent at the concentration; a comparative test was carried out using the same method for an 18% sodium chloride solution under the same conditions.

2) And testing relative snow and ice melting capacity:

adding 100mL of water into 3 200mL beakers, placing the beakers in a low-temperature incubator at minus 10 ℃ until the beakers are frozen, and weighing the mass of the beakers and ice blocks for later use; then the snow-melting agent of the embodiment 1, the embodiment 3 and the embodiment 4 is respectively poured into the ice blocks in the beaker, the liquid is poured within 30min, and the mass of the residual ice blocks and the beaker is rapidly weighed; a comparative test of 18% sodium chloride solution is carried out by the same method under the same condition, and the snow melting capability of the snow melting agent and the sodium chloride snow melting agent is calculated.

3) And testing the concrete corrosion rate:

100mL of the snow-melting agent obtained in example 1, example 3 and example 4 was added to 3 200mL beakers, and the statically-maintained concrete test pieces (100X 100mm) were immersed in the prepared snow-melting agent solution for 14 days, and the snow-melting agent solution was replaced every 7 days, and the mass of the concrete test pieces before and after immersion was measured. A18% sodium chloride solution comparative test was conducted under the same conditions by the same method, and the mass of the concrete test block before and after immersion was measured.

4) And testing the corrosion rate of the metal carbon steel:

the snow-melting agent obtained in examples 1 to 3 was subjected to measurement of the corrosion rate of carbon steel according to the method for measuring corrosion inhibition performance of water treatment agent by the spin coating method (GB/T18175-2000). 100mL of the snow-melting agent obtained in example 1, example 3 and example 4 was added to 3 200mL beakers, respectively, and carbon steel sheets 50mm × 50mm × 2mm were soaked in the prepared snow-melting agent solution for 180 days, respectively, and the surface of the test block after soaking was not significantly corroded. A comparative test of 18% sodium chloride solution was carried out under the same conditions by the same method, and the corrosion of the carbon steel sheet was examined.

Table 2 shows the relative snow-melting and ice-melting ability, concrete corrosion rate, and metal carbon steel corrosion rate of the snow-melting agent prepared in the example.

As can be seen from table 2: the freezing point of the snow-melting agent prepared in the embodiment 1, the embodiment 3 and the embodiment 4 is lower, and the relative snow-melting and deicing capacity is 105-110% of 18% sodium chloride solution under the same condition and is higher than that of the sodium chloride solution; from concrete corrosion experiments, the corrosion rate of the snow-melting agent prepared in the examples 1, 3 and 4 on concrete is less than that of sodium chloride solution, and almost no corrosion is caused; from carbon steel corrosion experiments, the snow-melting agent prepared in the embodiment 1, the embodiment 3 and the embodiment 4 has less corrosion capability on carbon steel than that of 18% sodium chloride solution, and reaches the index requirement that the carbon steel corrosion rate is less than or equal to 0.11mm/a specified by the national standard GB/T23851-2017, so that the snow-melting agent prepared by the invention has the characteristics of strong snow-melting capability, no corrosion to the environment, no harm and the like.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.