Preparation method of environment-friendly snow melting agent

Abstract

The invention provides a preparation method of an environment-friendly snow melting agent. The environment-friendly snow melting agent is prepared from, by weight, 30%-50% of calcium magnesium acetate and 50%-70% of sodium acetate. The environment-friendly snow melting agent is prepared through the following steps that collected garden waste is utilized to prepare pyroligneous liquor; the obtained pyroligneous liquor reacts with commercially-available lightly-roasted dolomite powder to prepare calcium magnesium acetate; the obtained pyroligneous liquor reacts with commercially-available industrial-grade anhydrous sodium carbonate to prepare sodium acetate, the prepared calcium magnesium acetate and sodium acetate are added into a mixer, stirring is performed for 15 minutes to enable the materials to be mixed uniformly, and then the environment-friendly snow melting agent is obtained. According to the method, the preparation cost of the snow melting agent is reduced, the environment-friendly snow melting agent meets the requirements of the Beijing snow melting agent standard (DB11 / T 161-2012) and almost has no corrosiveness on bridges and roads, and the relative damage degree to plant seeds is smaller than 40%.

Description

technical field [0001] The invention relates to a deicing agent and a preparation method thereof, in particular to an environment-friendly deicing agent and a preparation method thereof, belonging to the technical field of environmental protection. Background technique [0002] At present, there are two main types of deicing agents used in my country, non-chlorinated deicing agents and chlorinated deicing agents. The main component of non-chlorine deicing agent is potassium acetate. Chlorine deicing agent is divided into two types: chlorine salt deicing agent and mixed deicing agent. Chloric salt deicing agent includes sodium chloride (salt), calcium chloride, magnesium chloride, chlorine Potassium etc. Mixed deicing agents are mixtures of chlorine salts and non-chlorine salts, some of which are added with rust and corrosion inhibitors. [0003] The price of non-chlorine deicing agents is very expensive, so, except for airports, most areas in my country are still using che...

AI Technical Summary

Problems solved by technology

[0005] In the patent "A Method for Preparing Environmental Protection Snow-melting Agent with Wood Vinegar" (CN201210198760.9), the filtrate obtained by reacting wood vinegar with paper-making white mud is concentrated and evaporated to obtain a snow-melting agent product. This invention patent is effective Utilizing the characteristics of wood vinegar and paper-making lime mud, the production cost is low, and the comprehensive utilization rate of waste is high. However, paper-making lime mud contains various components such as aluminum, iron, and magnesium. After it is used as a snow-melting agent product, it will cause environmental damage. Secondary pollution

[0006] In the patent "method and application of white deicing agent prepared from wood vinegar (CN201410033297.1)", colorless wood vinegar, calcium carbonate and basic magnesium carbonate are mixed and dried in a certain proportion to obtain a white Solid deicing agent, the deicing agent has better ice-melting ability, and has no impact on road facilities due to chlorine damage, but this invention patent uses distillation method in the process of preparing colorless wood vinegar, which requires high equipment and can High consumption

Images