Method for preparing environment-friendly snow-melting agent by using byproduct crude glycerol and waste acetic acid

Abstract

The invention discloses a method for preparing an environment-friendly snow-melting agent by using a byproduct crude glycerol and waste acetic acid. The preparation process comprises the following steps: (1) pretreating the crude glycerol; (2) preparing acetate; (3) preparing a snow-melting agent; and (4) concentrating the product. According to the method disclosed by the invention, an industrial byproduct and a waste are used as raw materials to prepare the environment-friendly snow-melting agent which is good in snow-melting and deicing performances, easy to use, and easy to degrade biologically, so that wastes are changed into valuable, and a good resource is provided for the development of the snow-melting agent.

Description

technical field [0001] The invention mainly relates to a preparation method of an environment-friendly deicing agent, in particular to a method for preparing an environment-friendly deicing agent by using by-product crude glycerin and waste acetic acid as main raw materials. Background technique [0002] Snow-melting agent is an essential material for winter road traffic safety by reducing the freezing point and liquid-phase vapor pressure of snow water, thereby realizing the melting of snow and ice in low-temperature conditions. It is also widely used in many fields such as electric power, factory buildings, and facility agriculture to ensure production. and life safety. The annual usage of deicing agent in the world is more than 30 million tons, and it is increasing year by year. [0003] Snow melting agents are divided into solid and liquid according to the dosage form, and can be divided into three categories: chloride type, non-chloride type and mixed type snow melting...

AI Technical Summary

Problems solved by technology

Non-chloride deicing agent has the outstanding advantages of good deicing effect, easy biodegradation, low corrosion, and environmental friendliness, but its high cost limits its large-scale promotion, and is currently only used in important areas such as airports, bridges, and highways; Mixed deicing agents mainly refer to chloride plus non-chloride, chloride plus corrosion inhibitor, low molecular polyols (ethylene glycol, propylene glycol, ethanol, etc.) and their mixed preparations, and mixed deicing agents of other components, such as 中国专利201410310767.4、201410026041.8、201410071987.6、201410010288.0、201410027050.9、201410109626.6、201310245571.7、201310245539.9、201310245560.9、201310419294.7、201010560436.8等的报道,分别以乙酸钾(50%)和乙酸钠(50%)为主要组成、以乙醇、蔗糖 , isosorbide, ethylene glycol, glycerol (50%), acesulfame potassium, sodium tripolyphosphate, aspartame, sodium hexametaphosphate, methanol, halitol, etc. , propylene glycol, diethane, tetramethylpentadecane and starch, xanthan gum or cellulose as the main components, with sodium chloride, magnesium chloride, calcium chloride and sodium citrate, sodium hexametaphosphate, sodium gluconate The main components are formate, sodium metasilicate, borax or calcium nitrate, sodium gluconate, etc., the main components are acetate, calcium chloride, magnesium chloride, calcium oxide, etc., and the low Molecular polyols (ethylene glycol, propylene glycol, ethanol), triethanolamine, sodium metasilicate, benzotriazepam, sodium dihydrogen phosphate, etc. are mainly composed of gelatin hydrolyzate (content 40%, mainly amino acids and polypeptides) compound), organic salt, urea and water as the main components, and a composite environmental protection deicing agent prepared by reacting wood vinegar, calcium carbonate and basic magnesium carbonate as raw materials

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