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Novel environment-friendly snow-melting agent and preparation method thereof

A snow-melting agent, an environmentally friendly technology, applied in the field of environmentally friendly snow-melting agents

Inactive Publication Date: 2012-11-14
深圳市科中大交通建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some researchers believe that when the impact of sodium chloride on the environment is calculated into its cost, the price of the two is comparable, CMA is still difficult to be generally accepted as a deicing agent, and can only be used in areas with strict environmental control requirements

Method used

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  • Novel environment-friendly snow-melting agent and preparation method thereof
  • Novel environment-friendly snow-melting agent and preparation method thereof
  • Novel environment-friendly snow-melting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Production of cheap CMA primary products through the reaction between glacial acetic acid and dolomite (Ca / MgO) or limestone (Ca / MgCO3). Use highly active hydrated dolomite [Ca(OH)2 / Mg(OH)2] to ensure n(Mg) / n(Ca)=7 / 3, and an excess of 2%, to ensure a certain pH value to achieve the best good response. The product contains 10% to 35% of generated water, and the initial product often also contains excessive acid or alkali, and then the pH of the solution is adjusted to 7 with sodium dihydrogen phosphate or ammonium dihydrogen phosphate.

[0017] 2. The by-product emulsion in the milk cheese production process is used as the raw material, and most of the solid components are removed through osmosis. The obtained whey is cyclically fermented in a fixed cell bioreactor, the cell density in the fermentation broth is 30g / L, the temperature is controlled at 37°C, the whey is fermented with S.lactis lactic acid bacteria strain to produce lactic acid, and then C.formicoacetic...

Embodiment 2

[0020] 1. React MgO with excess acetic acid to form a mixed solution of magnesium acetate and acetic acid, and then neutralize the unreacted acetic acid with hydrated limestone to obtain CMA. During the reaction, ensure that n(Mg) / n(Ca)=7 / 3. The optimal composition of CMA as a deicing agent is n(Mg) / n(Ca)=7 / 3, which is close to the lowest eutectic point (-37) of the two acetates, and has a high heat capacity. During the drying process, It is not easy to decompose at 100°C. Compared with the composition of equimolar CMA, it is not easy to scale on concrete.

[0021] 2. The by-product emulsion in the milk cheese production process is used as the raw material, and most of the solid components are removed through osmosis. The obtained whey is cyclically fermented in a fixed cell bioreactor, the cell density in the fermentation broth is 30g / L, the temperature is controlled at 37°C, the whey is fermented with S.lactis lactic acid bacteria strain to produce lactic acid, and then C.f...

Embodiment 3

[0024] 1. The by-product emulsion in the milk cheese production process is used as the raw material, and most of the solid components are removed through osmosis. The obtained whey is cyclically fermented in a fixed cell bioreactor, the cell density in the fermentation broth is 30g / L, the temperature is controlled at 37°C, the whey is fermented with S.lactis lactic acid bacteria strain to produce lactic acid, and then C.formicoaceticum is used Acetobacter strains ferment lactic acid to acetic acid. Control the temperature at 75-85°C, then use secondary or tertiary amine to extract acetic acid, use calcium magnesium oxide or calcium magnesium carbonate as stripping agent, and the stripping product is CMA. The process can also adopt the method of coupling reaction and separation, that is, extractive fermentation method, to improve conversion rate and yield. In the process, the yields of lactic acid and acetic acid fermentation are respectively 98.8% and 96.7%, and the total yie...

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Abstract

The invention discloses a low-cost environment-friendly snow-melting agent, and a preparation method and an application of the low-cost environment-friendly snow-melting agent. The low-cost environment-friendly snow-melting agent is prepared by mixing 85 to 95% of low-cost CMA, 2 to 10% of potassium acetate, 1 to 8% of sodium dihydrogen phosphate, and 0 to 3% of polyphosphoric acid. The environment-friendly snow-melting agent is low in cost, has no corrosion, and is harmless to soil. The low-cost CMA is the low-cost CMA granular product which is manufactured by mixing calcium magnesium acetate which is produced by the reaction between a biologically fermented by-product emulsion produced by producing cheese through milk and served as the raw material and calcium-magnesium oxide and the calcium magnesium acetate produced by the reaction between glacial acetic acid and dolomite (Ca / MgO) or limestone (Ca / MgCO3) based on a certain ratio; the potassium acetate can increase the snow-melting frequency, and the potassium can improve the fertility of the soil; the sodium dihydrogen phosphate served as the neutralizer can ensure that the pH value of an aqueous solution prepared by mixing is 7; and with the polyphosphoric acid serving as the preservative, the prepared snow-melting agent has low corrosion or has no corrosion.

Description

technical field [0001] The invention relates to an environment-friendly deicing agent mainly composed of CMA (calcium magnesium acetate), which contains various additives. Background technique [0002] The prior art deicing agent mainly adopts sodium chloride as the main raw material. Although the purpose of snow removal is achieved, it is highly corrosive, which will not only cause serious corrosion to roads, bridges, motor vehicles and traffic roads, reduce the service life, but also cause damage to flowers and trees on both sides of the road, and cause salinization of the soil. Cause environmental pollution. [0003] Also have some improved technologies for reaching environmental protection purpose, as the disclosed deicing agent of CN200610046356 patent application is to be at least two in five kinds of raw materials of calcium nitrate, calcium chloride, magnesium chloride, sodium chloride, calcium hypochlorite and sodium metasilicate, sodium metasilicate, Sodium molyb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18
Inventor 张少高黄燕生谢顺理
Owner 深圳市科中大交通建材有限公司
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