Manufacturing method of active magnesium oxide

A technology of activated magnesia and its manufacturing method, which is applied in the direction of magnesia, chemical instruments and methods, and other chemical processes to achieve the effects of low production cost, easy acquisition, and simple and efficient manufacturing method

Inactive Publication Date: 2017-07-25
广州峰华化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only completed in the laboratory and has not been applied to industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the content provided by the present invention, the contriver makes active magnesium oxide 1 according to the following steps, and concrete steps are as follows:

[0031] Step 1, calcining and digesting dolomite to make Ca(OH) 2 —Mg(OH) 2 slurry;

[0032] Step 2, at a certain temperature, the Ca(OH) 2 —Mg(OH) 2 Slurry and CO 2 Carry out carbonization reaction to generate CaCO 3 Precipitation and Mg(HCO 3 ) 2 solution, through solid-liquid separation, to obtain Mg(HCO 3 ) 2 solution;

[0033] Step three, Mg(HCO 3 ) 2 The temperature of the solution was controlled at 36°C, pyrolyzed, separated, and dried for 2 hours to obtain basic magnesium carbonate;

[0034] Step 4, calcining basic magnesium carbonate, controlling the calcining temperature at 550° C., and calcining for 45 minutes to obtain the primary magnesium oxide;

[0035] Step 5, putting the primary product of magnesium oxide into a ball mill for ball milling, milling for 30 minutes, diges...

Embodiment 2

[0040] According to the content provided by the present invention, the contriver makes active magnesium oxide 2 according to the following steps, and concrete steps are as follows:

[0041] Step 1, calcining and digesting dolomite to make Ca(OH) 2 —Mg(OH) 2 slurry;

[0042] Step 2, at a certain temperature, the Ca(OH) 2 —Mg(OH) 2 Slurry and CO 2 Carry out carbonization reaction to generate CaCO 3 Precipitation and Mg(HCO 3 ) 2 solution, through solid-liquid separation, to obtain Mg(HCO 3 ) 2 solution;

[0043] Step three, Mg(HCO 3 ) 2 The temperature of the solution was controlled at 42°C, pyrolyzed, separated, and dried for 3 hours to obtain basic magnesium carbonate;

[0044] Step 4, calcining basic magnesium carbonate, controlling the calcining temperature at 600°C, and calcining for 60 minutes to obtain the primary magnesium oxide;

[0045] Step 5, putting the primary product of magnesium oxide into a ball mill for ball milling, milling for 40 minutes, digesti...

Embodiment 3

[0050]According to the content provided by the present invention, the contriver makes active magnesium oxide 3 according to the following steps, and concrete steps are as follows:

[0051] Step 1, calcining and digesting dolomite to make Ca(OH) 2 —Mg(OH) 2 slurry;

[0052] Step 2, at a certain temperature, the Ca(OH) 2 —Mg(OH) 2 Slurry and CO 2 Carry out carbonization reaction to generate CaCO 3 Precipitation and Mg(HCO 3 ) 2 solution, through solid-liquid separation, to obtain Mg(HCO 3 ) 2 solution;

[0053] Step three, Mg(HCO 3 ) 2 The temperature of the solution was controlled at 39°C, pyrolyzed, separated, and dried for 2.5 hours to obtain basic magnesium carbonate;

[0054] Step 4, calcining basic magnesium carbonate, controlling the calcining temperature at 575° C., and calcining for 52 minutes to obtain the primary magnesium oxide;

[0055] Step 5, putting the primary product of magnesium oxide into a ball mill for ball milling, milling for 35 minutes, dige...

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Abstract

The invention discloses a manufacturing method of active magnesium oxide. The manufacturing method comprises the following steps: I, putting a primary magnesium oxide into a ball mill for ball milling, digesting with water, removing residues, and preparing into an ash emulsion; II, carbonizing the ash emulsion with CO-, to obtain a high-purity magnesium bicarbonate solution; III, pyrolyzating the high-purity magnesium bicarbonate solution at the temperature of 35-40DEG C, separating and drying for 2.5-3.5h, to obtain high-purity alkaline type magnesium carbonate; and IV, performing ball-milling to the high-purity alkaline type magnesium carbonate for 30-40 minutes through the ball mill, and then calcinating for 30-45 minutes at 620-810DEG C, to obtain active magnesium oxide. The active magnesium oxide manufactured by adopting the manufacturing method of active magnesium oxide has high activity, the raw materials needed during preparation is cheap and easily available, the production cost is low, no toxicity and harmfulness exist, the production process is environment-friendly, the manufacturing method is simple and efficient and easy to control, and applicable to large-scale production and application. The active magnesium oxide manufactured by adopting the manufacturing method of active magnesium oxide has high activity, thus being capable of adsorbing toxic substances.

Description

technical field [0001] The invention relates to a method for producing active magnesium oxide. Background technique [0002] Highly active magnesium oxide is a new type of fine inorganic material, generally an aggregate of nanoparticles, with a particle size between 1-2000nm and an iodine absorption value of more than 12omg / g. It has special functions such as heat, light, electricity, mechanics and chemistry that are different from those of the bulk material. Highly active magnesium oxide is mainly used as an accelerator and activator for chloroprene rubber, butyl rubber, nitrile rubber, and fluororubber, as a filler for adhesives, plastics, paints, and paper, and can also be used to manufacture refractory materials and magnesium oxide cement, etc. , used medicinally as an antacid and laxative. Ultra-fine powder magnesium oxide is compounded with high polymer or other materials, which has good microwave absorption performance. Using powder magnesium oxide can realize low-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/02B82Y30/00B82Y40/00B01J20/04B01J20/30
CPCC01F5/02B01J20/04B01J2220/4806B82Y30/00B82Y40/00C01P2004/51C01P2004/64
Inventor 王文军
Owner 广州峰华化工科技有限公司
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