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Method for preparing environment-friendly snow melting agent by using pyroligneous liquid

A technology of wood vinegar and deicing agent, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high cost, low melting point, deicing agent pollution, etc., achieve high comprehensive utilization rate, simple production process, deicing agent The effect of environmental protection

Inactive Publication Date: 2012-09-26
天津尚辰文化传播有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the deicing agents currently used are mainly chlorine salts, which seriously damage the environment around the road. First of all, the use of deicing agents will damage the plants around the road, and the corrosion of the road surface and bridges is also very serious. Due to The infiltration of salt water into the ground will lead to salinization of the land. At present, most deicing agents have pollution problems.
Among various deicing agents, calcium acetate has the best snow-melting effect and is recognized as an environmentally friendly chemical in the world. Compared with chloride salts, it has a low melting point, is biodegradable, and has little corrosion to road infrastructure and metals. There is basically no pollution to soil and water resources. Usually, the existing calcium acetate deicing agent is made of acetic acid and dolomite, which has technical problems such as high cost. Now it can only be used in airports, railways, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of method that wood vinegar prepares environment-friendly deicing agent, and its preparation process comprises following processing steps:

[0027] 1. Reaction of wood vinegar and white mud:

[0028] Wood vinegar and white mud, a by-product of papermaking, are stirred and reacted at room temperature for 2-2.5 hours; the weight ratio of wood vinegar and white mud is 5:1-3;

[0029] The white mud by-product of papermaking is firstly washed, and the pH value of the washed white mud is 7-8; then it is dehydrated by a centrifuge, and the water content of the white mud is 5-12%.

[0030] 2. Reactant filtration:

[0031] The reactant obtained in step (1) is filtered by a filter, and the solid phase and the liquid phase are separated to obtain a filtrate containing calcium acetate;

[0032] 3. Decolorization treatment:

[0033] The filtered calcium acetate-containing filtrate is subjected to decolorization treatment, and activated carbon adsorption is used for decolor...

Embodiment 2

[0037] A kind of method that wood vinegar prepares environment-friendly deicing agent, and its preparation process comprises following processing steps:

[0038] 1. White mud treatment:

[0039] First wash the white mud by-product of papermaking, the pH value of the washed white mud is 7, use PH test paper; then dehydrate with a centrifuge, the water content of the white mud is 12%.

[0040] 2. Reaction of wood vinegar and white mud:

[0041] Weigh directly 50 grams of wood vinegar, add it to a three-necked flask, then add 20 grams of washed white mud (excessive), wood vinegar and papermaking by-product white mud, and stir for 2 hours at room temperature;

[0042] 3. Filtration, decolorization treatment:

[0043] The reactant obtained in step (2) was filtered, and the filtrate was taken, and activated carbon was added at 5% by weight of the filtrate, mixed and stirred for 30 minutes, left to stand and filtered to obtain a colorless or light yellow filtrate.

[0044] 4. T...

Embodiment 3

[0047] A kind of method that wood vinegar prepares environment-friendly deicing agent, and its preparation process comprises following processing steps:

[0048] 1. White mud treatment:

[0049] Firstly, the white mud by-product of papermaking is washed, and the pH value of the washed white mud is 7.5, using precision PH test paper; then, the plate and frame filter press is used for dehydration, and the water content of the white mud is 10%.

[0050] 2. Wood vinegar reacts with white mud:

[0051] Take by weighing 100 kilograms of wood vinegar, join in the reaction axe, then add 40 kilograms of white mud after washing in step 2, wood vinegar and papermaking by-product white mud, at room temperature, stir and react for 2 hours.

[0052] 3. Filtration, decolorization treatment:

[0053] The reactant obtained in step (2) is filtered, and the filtrate is taken, and activated carbon is added according to 5% of the weight of the filtrate, mixed and stirred for 30 minutes, heate...

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Abstract

The invention relates to a method for preparing an environment-friendly snow melting agent by using a pyroligneous liquid, belonging to the technical field of a snow melting agent. The method for preparing the environment-friendly snow melting agent by using the pyroligneous liquid is characterized in that the environment-friendly snow melting agent is prepared through the following steps: (1) reacting the pyroligneous liquid with white mud, namely, stirring and reacting the pyroligneous liquid with the papermaking byproduct for 2-2.5 hours at room temperature, wherein the weight ratio of the pyroligneous liquid to the white mud is 5:(1-3); (2) carrying out reactant filtration, namely, filtering the reactant obtained in the step (1) by using a filter, and separating a solid phase from a liquid phase so as to obtain filtrate containing calcium acetate; and (3) concentrating and evaporating the filtrate, namely concentrating and evaporating the filtrate which is filtered in the step (2) and contains calcium acetate so as to obtain the snow melting agent product. The method has the advantages that production process is simple and cost is low; the snow melting agent is environment-friendly and high in comprehensive utilization rate; and the problems of wood vinegar and white mud in a papermaking plant are solved once.

Description

technical field [0001] The invention belongs to the technical field of snow-melting agents, in particular to a method for preparing an environmentally friendly snow-melting agent from wood vinegar. Background technique [0002] At present, with the continuous expansion of the city scale, the impact of winter snow on urban road traffic and urban life is becoming more and more prominent. The use of deicing agents has become one of the effective methods for clearing road snow. Most of the deicing agents currently used are mainly chlorine salts, which seriously damage the environment around the road. First of all, the use of deicing agents will damage the plants around the road, and the corrosion of the road surface and bridges is also very serious. Due to The infiltration of salt water into the ground will lead to salinization of the land. At present, most deicing agents have pollution problems. Among various deicing agents, calcium acetate has the best snow-melting effect and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18
Inventor 王万森
Owner 天津尚辰文化传播有限公司
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