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Prepn of magnesium peroxide

A technology of magnesium peroxide and magnesium oxide, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of low product yield problems, to achieve the effect of simple production process, high yield, and improved heat and humidity stability

Inactive Publication Date: 2002-09-25
陶华西
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The soluble magnesium salt method uses magnesium sulfate or magnesium chloride to react with hydrogen peroxide in aqueous ammonia solution. Due to the large amount of mother liquor used, the product yield is low, and the content of the prepared magnesium peroxide is generally between 25-30%. between

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 300g of 35% hydrogen peroxide in a 2000ml beaker, add water to make a dilute hydrogen peroxide solution with a concentration of about 25%, then add 3.5g of hydroxyethylidene diphosphonic acid in the dilute solution for subsequent use.

[0019] In above-mentioned dilute solution, add magnesium oxide (reagent grade) 200g portion by portion, at this moment following chemical reaction takes place in liquid phase:

[0020]

[0021] During the reaction, the temperature of the reaction system should be controlled at 40±5°C. After the reaction, the powdered wet product magnesium peroxide is obtained by centrifugation, and the wet product is vacuum-dried at 70°C and the pressure is 80mmHg to obtain 240g of magnesium peroxide powder with a content of 36.8%. .

Embodiment 2

[0023] Add 300 g of 35% hydrogen peroxide in a 2000 ml beaker and add water to form a 10% dilute hydrogen peroxide solution, then add 4.0 g of sodium hydroxyethylidene diphosphonate for later use.

[0024] In above-mentioned dilute hydrogen peroxide solution, add industrial grade magnesium oxide 200g in portions, following steps are the same as embodiment 1, obtain 230g content after reaction and be the magnesium peroxide of 36.4%.

Embodiment 3

[0026] Add 210g of 50% hydrogen peroxide in a 2000ml beaker and add water to form a 30% dilute hydrogen peroxide solution, then add 1.5g aminotrimethylene phosphonic acid and 2.5g hydroxyethylidene diphosphonic acid to the dilute solution, as follows Step is the same as embodiment 2, obtains the magnesium peroxide that 236g content is 36.8% after the reaction.

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PUM

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Abstract

The present invention relates to an improved preparation process of magnesium peroxide. The process is characterized by that dilute hydrogen peroxide solution, magnesia, powder as raw material and organic phosphonic acid and its salt as stabilizer are added to produce wet magnesium peroxide, which is dried to obtain white magnesium peroxide powder. The added amount of phosphonic acid and its saltby weight of P2O5 is 0.01-1.5 wt% of magnesia. By the process stability of magnesium peroxide is raised during reaction to produce magnesium peroxide product with magnesium peroxide content over 30%.In addition, the process is simple, low in power consumption and high in yield and is suitable for large scale production.

Description

technical field [0001] The invention relates to a preparation method of magnesium peroxide, belonging to the technical field of peroxide preparation in inorganic chemistry. Background technique [0002] Magnesium peroxide, its molecular formula is: MgO 2 , white powder, its industrial products are made of MgO 2 , MgO, Mg(OH) 2 It can be used as an antacid and anti-fermenting agent in medicine, suitable for treating symptoms such as indigestion, hyperacidity, constipation, abdominal distension, etc. It can be used as a sewage treatment agent in environmental protection, and can also be used as a cosmetic and water treatment agent. Disinfection and bleaching. [0003] At present, there are two main production methods of magnesium peroxide: one is the light magnesium oxide method, which is obtained by direct reaction of light magnesium oxide with more than 50% concentrated hydrogen peroxide and obtained by drying; the other is obtained by using soluble ...

Claims

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Application Information

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IPC IPC(8): C01B15/043
Inventor 陶华西郑龙顾伟明池宋燕
Owner 陶华西
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