Low-chloride snow-melting agent and preparation method and application thereof

Abstract

The invention belongs to the technical field of environmentally friendly chemicals, particularly relates to a low-chloride snow-melting agent and further discloses a preparation method of the low-chloride snow-melting agent.According to the low-chloride snow-melting agent, sodium borate, sodium formate, calcium chloride, ammoniom acetate, ethylenediamine tetraacetic acid disodium, urea, potassium citrate, sodium gluconate and sodium bentonite serve as preparation raw materials, the content of chlorine salt is low, adopted raw materials are all ingredients which are safe, free of toxin and environmentally friendly and completely meet the requirement for environmentally friendliness.The prepared low-chloride snow-melting agent has the advantages of being low in freezing point (the freezing point of 200 g / L is lower than minus 11 DEG C), high in dissolution velocity (the speed is higher than 10 g / min), high in ice melting capacity (90% higher than snow melting capacity of sodium chloride) and small in corrosion of carbon steel materials (corrosion is smaller than 0.03 mm / a), can be widely applied to snow melting and freezing prevention of various roads, is low in chlorine ion content of a product and is consistent with the current development requirement of environmental protection.

Description

technical field [0001] The invention belongs to the technical field of environmental protection chemicals, and in particular relates to a low-chlorine deicing agent and a preparation method thereof. Background technique [0002] Snow melting agent, also known as deicing salt and road antifreeze, is mainly used in winter airports, highways, squares, parking lots, railways, urban streets, etc. to melt ice and snow and prevent freezing. Its ingredients are sodium chloride, calcium chloride , magnesium chloride and other salts. [0003] At present, there are many types of deicing agents developed in my country, which are divided into solid preparations and liquid preparations according to the state of matter; according to the composition, they are divided into inorganic preparations and mixed preparations containing both inorganic and organic substances; they can also be divided into urban preparations according to different uses. Road deicing agent and deicing agent used in bri...

AI Technical Summary

Problems solved by technology

For example, corrosion inhibitors, rust inhibitors or preservatives are added to snow-melting salt, but most of the protective agents added are salts such as nitrite and acetate, so this type of environmentally friendly snow-melting agent can only be used for Reinforced concrete bridges cannot be used on non-bridge roads, and once the deicing agent seeps into the soil with water, it will still seriously pollute the groundwater, so strictly speaking, it cannot be called an environmentally friendly deicing agent

For example, Chinese patent CN104293298A discloses a low-corrosion and high-efficiency chloride salt deicing agent. Although the deicing agent is added with a high-efficiency corrosion inhibitor, it can slow down the corrosion of road surfaces and metals to a large extent, but in the long run, the product is still Contains a large amount of chlorine salt, which poses a serious risk of corrosion to road surfaces and metal materials, and has a greater impact on adjacent vegetation

It can be seen that the snow-melting agent products made by adding protective agent cannot fundamentally solve the harm of snow-melting agent

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