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

A technology of crude glycerol and waste acetic acid, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of limited large-scale promotion and high cost, and achieve improved snow melting and deicing performance, long action time, and easy biodegradation Effect

Inactive Publication Date: 2015-07-08
淮南新能源研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: preparation of deicing agent

[0031] The deicing agent was prepared by using crude glycerin and waste acetic acid as raw materials from different sources, and the following two sets of experiments were carried out:

[0032] Test group 1: Take 100g of crude glycerin (about 83% glycerol content) produced by biodiesel, which contains a small amount of potassium hydroxide, which does not affect the performance of the snow-melting agent; first add 50g of ether to it, mix well, let stand for 1h, divide 93g of the glycerol phase of the lower layer is taken after the layer, and its glycerol content is about 90% after measuring, and the ether phase adopts a rotary evaporator at 95°C to reclaim the solvent; get 100g of waste acetic acid (about 82% of the acetic acid content) produced by the fermentation production process of N-acetylneuraminic acid , which contains a small amount of organic matter, which does not affect the performance of the snow-melting agent pro...

Embodiment 2

[0034] Example 2: Detection of freezing point and snow-melting and ice-melting ability of different formula deicing agents

[0035] The deicing agents obtained from the two sets of tests carried out in Example 1 are all configured according to the ratio of glycerin and potassium acetate 4:1 to 1:4, and the preparation raw materials do not contain mercury (Hg), cadmium (Cd), chromium (Cr) , lead (Pb), and arsenic (As), so the resulting deicing agent has the same composition and does not contain the above metal ions. According to the method specified in GB / T 23851-2009 "Road Deicing and Snow Melting Agent", the results of testing the freezing point and snow melting and ice melting ability of different formulas of snow melting agents are shown in Table 1.

[0036] The test results in Table 1 show that the snow-melting and ice-melting ability of the snow-melting agent obtained according to the formula adopted in the invention is significantly higher than the relevant regulations o...

Embodiment 3

[0038] Embodiment 3: The actual use effect of different formula deicing agents

[0039] From January 27th to 29th, 2015, the weather in Hefei City was from moderate snow to heavy snow, and the lowest temperature was -3°C. The snowmelting agent obtained by the present invention was diluted 5 times with water, and evenly sprayed on the snow-falling concrete floor. The result was It shows that there is no snow accumulation on the ground where the deicing agent is sprayed within 3 days, indicating that the actual use effect of the deicing agent is good.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18
Inventor 刘伟伟陈祥松吴金勇袁丽霞周聪姚建铭
Owner 淮南新能源研究中心
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