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Preparation method of soft-film type degradable dust suppressant

A technology of dust suppressant and soft film, applied in the field of preparation of soft film type degradable dust suppressant, can solve the problems of non-degradable, high residual rate, easy to break, etc. Degradation effect

Active Publication Date: 2016-10-12
宁波绿拾光新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the invention is to solve the defects that the traditional hard-shell adhesive dust suppressant is not easy to degrade, has a high residual rate, easily causes secondary pollution, and is easily broken after being shaken and loses the dust suppression effect. A kind of preparation method of soft film type degradable dust suppressant
The method first extracts carboxyl-rich glycyrrhizin from licorice root as a modifier, then extrudes and expands corn stalks, adjusts the pulp, mixes with glycyrrhizin and supplements with compound enzyme preparations for biological modification, and obtains Latex-like soft film degradable dust suppressant, the dust suppressant prepared by the invention forms a soft film on the surface of the material after application, has strong wettability and adsorption, and does not contain corrosive moisture Inorganic salt solves the problem that traditional hard-shell dust suppressants are easily broken and affects the dust suppression effect, and the preparation material is pure biomass, which is easy to degrade, and makes up for the difficulty of traditional hard-shell bonded dust suppressants. High rate, easy to cause secondary pollution, has broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Take the dried licorice root and crush it, pass it through a 60-mesh standard sieve, add 8 times the mass of absolute ethanol to the obtained licorice root powder, mix it evenly, put it in a water bath at 80°C, keep it warm for 1 hour, and then separate it to obtain Extract solution, concentrate the extract solution under reduced pressure to a solid content of 30% to obtain a concentrated solution; transfer the above concentrated solution to a horizontal centrifuge, and centrifuge at a speed of 5000r / min for 10 minutes to obtain the lower sediment, and finally put the sediment put into an oven, and dry at 40°C for 4 hours to obtain glycyrrhizin for later use; take corn stalks and mechanically crush them with a stalk grinder and pass through a 40-mesh sieve, transfer the sieved straw powder into a twin-screw extruder and heat up to 120°C, extruded and extruded for 2 hours at a working pressure of 0.5MPa and a rotating speed of 400r / min to obtain pretreated columnar straw ...

example 2

[0020] Take the dried licorice root and crush it, pass it through a 60-mesh standard sieve, add 9 times the mass of absolute ethanol to the obtained licorice root powder, mix it evenly, put it in a water bath at 85°C, keep it warm for 1 hour, and then separate it to obtain The extract is concentrated under reduced pressure in vacuum to a solid content of 35% to obtain a concentrate; the above concentrate is transferred to a horizontal centrifuge and centrifuged at a speed of 6000r / min for 13 minutes to obtain the lower layer of sediment, which is finally put into Put it into an oven and dry it at 45°C for 4 hours to obtain glycyrrhizin, which is ready for use; take the corn stalks and mechanically crush them with a stalk grinder and pass them through a 40-mesh sieve, then transfer the sieved straw powder into a twin-screw extrusion extruder and heat up to 125°C, extruded and puffed for 2 hours at a working pressure of 0.5MPa and a rotating speed of 450r / min to obtain pretreated...

example 3

[0023] Take the dried licorice root and grind it through a 60-mesh standard sieve, add absolute ethanol 10 times its mass to the obtained licorice root powder, mix it evenly, put it in a water bath at 90°C, keep it warm for 2 hours, and then separate it to obtain The extract is concentrated under reduced pressure in vacuum to a solid content of 40% to obtain a concentrate; the above concentrate is transferred to a horizontal centrifuge and centrifuged at a speed of 7000r / min for 15 minutes to obtain a lower layer of sediment, which is finally put into put into an oven and dry at 50°C for 5 hours to obtain glycyrrhizin, which is ready for use; take the corn stalks and use a stalk grinder to grind them mechanically and pass through a 40-mesh sieve, then transfer the sieved straw powder into a twin-screw extruder and heat up to 130°C, extruded and extruded for 3 hours at a working pressure of 0.6MPa and a rotating speed of 500r / min to obtain pretreated columnar straw particles; th...

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Abstract

The invention relates to a preparation method of a soft-film type degradable dust suppressant and belongs to the field of preparation of dust suppressants. According to the method, firstly, glycyrrhizin containing rich carboxyl is extracted from liquorice roots to serve as a modifier, corn straw is extruded, made into pulp and mixed with glycyrrhizin, the mixture is subjected to biological modification through a compound enzyme preparation and then discharged, and the emulsive soft-film type degradable dust suppressant is obtained. After the prepared dust suppressant is applied, a soft film is formed on the surface of a material, and the dust suppressant has extremely high wettability and adsorbability, does not contain corrosive moisture-absorbing inorganic salt, solves the problem that a traditional hard shell type dust suppressant is easy to break and the dust suppression effect is influenced, is prepared from pure biomass which is easy to degrade, overcomes the defects that the traditional hard shell adhesion type dust suppressant is not easy to degrade, has high residual rate and can cause secondary pollution easily and has broad application prospect.

Description

technical field [0001] The invention relates to a preparation method of a soft-film degradable dust suppressant, belonging to the field of dust suppressant preparation. Background technique [0002] Dust has become the largest source of pollution in the world's public hazard pollution. Many activities aimed at human beings, especially open-pit coal mining, gravel coal transportation, urban bare ground and piles of garbage and waste, etc. will form dust pollution. In recent years, the vigorous development of the mining industry, the increase of the coal transportation industry, the construction of urban infrastructure, and the long-term accumulation of garbage and waste have all made dust pollution more and more serious. There are many sources of dust pollution. The main source of pollution is that some coal dust enters the atmosphere due to wind speed and turbulence during railway transportation, causing air pollution and environmental deterioration along the railway. Dust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22
CPCC09K3/22
Inventor 丁玉琴林大伟
Owner 宁波绿拾光新材料有限公司
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