Method for preparing high-content nanometer magnesium peroxide by one-pot precipitation and product of high-content nanometer magnesium peroxide

A technology of magnesium peroxide and precipitation method, applied in the direction of chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of high production cost, many process steps, low product content, etc., achieve reduced dosage, simple preparation process, The effect of high content

Active Publication Date: 2018-10-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for preparing high-content nano-magnesium peroxide and its products by a one-pot precipitation method, by adding a precipitant and an oxidant hydrogen peroxide to a solution containing a magnesium compound, and after a The pot precipitation method prepares high-content nano-magnesium peroxide, and the whole reaction process does not need to add stabilizers, thereby solving the technical problems of many process steps, high production costs, low product content and large particle size.

Method used

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  • Method for preparing high-content nanometer magnesium peroxide by one-pot precipitation and product of high-content nanometer magnesium peroxide
  • Method for preparing high-content nanometer magnesium peroxide by one-pot precipitation and product of high-content nanometer magnesium peroxide
  • Method for preparing high-content nanometer magnesium peroxide by one-pot precipitation and product of high-content nanometer magnesium peroxide

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Embodiment 1

[0040] Accurately weigh 1.28g of magnesium nitrate hexahydrate and dissolve it in 20.5mL of deionized water, then quickly add 1.5mL of ammonia water; after stirring for 20 minutes, quickly add 8mL of hydrogen peroxide, wherein the molar concentration of magnesium ions is 0.17mol / L, and the mass concentration of hydrogen peroxide 8%, and then continue to react at room temperature for 1 h, and the whole reaction process is carried out under 180 r / min magnetic stirring; finally, the mixed solution is centrifuged at 5000 r / min, washed and dried in a 50 ° C oven for 12 h to obtain Nano Magnesium Peroxide. After titrating with potassium permanganate standard solution, the calculated product content is 83.0wt%.

[0041] figure 2 It is the XRD collection of collections of nano magnesium peroxide prepared according to preferred embodiment 1 of the present invention; figure 2 As shown, compared with its standard card, it shows that the product is magnesium peroxide.

Embodiment 2

[0043] Accurately weigh 1.28g of magnesium nitrate hexahydrate and dissolve it in 18.5mL of deionized water, then quickly add 1.5mL of ammonia water; after stirring for 20 minutes, quickly add 10mL of hydrogen peroxide, wherein the molar concentration of magnesium ions is 0.17mol / L, and the mass concentration of hydrogen peroxide 10%, and then continue to react at room temperature for 1 h, and the whole reaction process is carried out under magnetic stirring at 180 r / min; finally, the mixed solution is centrifuged at a speed of 5000 r / min, washed and placed in an oven at 50 ° C for 12 h. Obtain nano magnesium peroxide. After titrating with potassium permanganate standard solution, the calculated product content is 85.4wt%.

[0044] Figure 7 Be according to the SEM collection of illustrative plates of the prepared nano-magnesium peroxide of preferred embodiment 2 of the present invention, as Figure 7 As shown, it can be found that the average particle size of the product is a...

Embodiment 3

[0046] Accurately weigh 15.38g of magnesium nitrate hexahydrate and dissolve it in 15mL of deionized water, then quickly add 15mL of ammonia water; after stirring for 30 minutes, quickly add 30mL of hydrogen peroxide, wherein the molar concentration of magnesium ions is 1mol / L, and the mass concentration of hydrogen peroxide is 15% , and then continue to react at room temperature for 4 hours, and the whole reaction process is carried out under 100r / min magnetic stirring; finally, the mixed solution is separated by suction filtration, washed and put into a 70°C oven for 12 hours to obtain nano-magnesium peroxide. After titrating with potassium permanganate standard solution, the calculated product content is 88.9wt%.

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Abstract

The invention belongs to the field of peroxide preparation methods, and discloses a method for preparing high-content nanometer magnesium peroxide by one-pot precipitation and a product of the high-content nanometer magnesium peroxide. The method comprises the steps as follows: firstly, a magnesium-containing compound is dissolved in water, a particle size control agent is added or not added, a proper quantity of precipitant and hydrogen peroxide are added randomly to form a suspension, the mass concentration of hydrogen peroxide in the mixed solution is 8%-15%, the mixed solution is stirred for reaction at room temperature, finally, precipitate after the reaction is separated, washed and dried, and nanometer magnesium peroxide with the content higher than 80wt% is obtained. Nanometer magnesium peroxide is prepared by one-pot precipitation, the raw materials are abundant and cheap, the preparation process is simple, energy consumption is low, no phosphorus-containing stabilizer is added, the product has small particle size and high purity, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of peroxide preparation, and more specifically relates to a method for preparing high-content nano-magnesium peroxide by a one-pot precipitation method and a product thereof. Background technique [0002] Magnesium peroxide, chemical formula MgO 2 , belonging to inorganic peroxides. White powder, odorless, tasteless, deliquescent. Insoluble in water, but slowly decomposes in water, easily soluble in dilute acid to generate hydrogen peroxide. It is relatively stable at room temperature and can be decomposed into oxygen and magnesium oxide when heated. Magnesium peroxide also has a strong oxidation effect, and can be used as a disinfectant, oxygen supply agent, gel breaker and tooth bleaching agent, and can also be used in medicine, cosmetics, soil improvement and environmental purification. [0003] CN101613088A discloses a method for preparing magnesium peroxide by a non-emulsification method, which uses soluble m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/043B82Y30/00
CPCB82Y30/00C01B15/043C01P2002/72C01P2004/03C01P2004/64C01P2006/80
Inventor 王维夏红亮谈发堂乔学亮刘晨
Owner HUAZHONG UNIV OF SCI & TECH
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