Method for preparing magnesiumhalide nano material

A technology of nanometer material and magnesium halide, which is applied in the field of preparation of magnesium halide nanometer microspheres, and achieves the effect of uniform distribution and small particle size.

Active Publication Date: 2011-03-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As far as we know, there are no patents and literature reports on the preparation of spherical nano-magnesium halide particles

Method used

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  • Method for preparing magnesiumhalide nano material
  • Method for preparing magnesiumhalide nano material
  • Method for preparing magnesiumhalide nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In a reactor fully replaced with nitrogen, add 1 g of anhydrous MgCl 2 , 10ml of ethanol, stirred, controlled temperature is about 120 ℃ and reacted for 3 hours, transferred to the mixed emulsion (coolant) of 0.3g vacuum ester and 50ml hexane at 30 ℃ while it was hot (120 ℃), the stirring speed of the coolant was 300 rpm, MgCl 2 The transfer rate of the ethanol solution was 0.5% / min of the total amount. After stirring for 20 min, stand and filter, wash with toluene 3 times and n-hexane 3 times (40 ml each time), and vacuum-dry to obtain 2.5 grams of spherical nano-magnesium chloride alcoholate particles.

Embodiment 2

[0035] In a reactor fully replaced with nitrogen, add 1 g of anhydrous MgCl 2 , 20ml of ethanol, stir, control the temperature at about 120°C for 3 hours, transfer to the mixed emulsion (cooling liquid) of 0.2g silicon ester and 50ml pentane at 30°C while it is hot (120°C), the stirring rate of the cooling liquid is 400 rpm, MgCl 2 The transfer rate of the ethanol solution was 0.1% / min of the total amount. After stirring for 20 min, stand and filter, wash with toluene 3 times and n-hexane 3 times (40 ml each time), and vacuum-dry to obtain 2.1 g of spherical nano-magnesium chloride alcoholate particles.

Embodiment 3

[0037] In a reactor fully replaced with nitrogen, add 1 g of anhydrous MgCl 2 , 30ml of absolute ethanol, stir, control the temperature at about 60°C for 3 hours, transfer to the mixed emulsion (coolant) of 3.0g white oil and 30ml heptane at -10°C while it is hot (60°C), the cooling liquid Stirring rate is 600 rpm, MgCl 2 The transfer rate of the ethanol solution was 5% / min of the total amount. After stirring for 5 hours, stand and filter, wash with n-hexane 3 times (40 ml each time), and vacuum-dry to obtain 0.9 g of spherical nano-magnesium chloride alcoholate particles.

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Abstract

The invention provides a method for preparing a magnesiumhalide nano material, belonging to the technical field of nano material preparation. The method for preparing spherical magnesiumhalide nano particles provided by the invention comprises the following steps: mixing a good solvent like alcohol or water with magnesiumhalide based on the molar ratio of (0.1-100):1; heating for reacting to generate a magnesiumhalide alcoholic solution or a magnesiumhalide aqueous solution; transferring the hot magnesiumhalide alcoholic solution or the hot magnesiumhalide aqueous solution to cooling liquid under a stirring state; filtering; cleaning by a poor solvent; and drying to obtain the product. The particles are small in particle size and are evenly distributed, and spherical magnesiumhalide nano particles with the particle size of 20-1000nm can be prepared by adjusting the preparation condition.

Description

technical field [0001] The invention belongs to the field of nanomaterials and the technical field of nanomaterial preparation, and in particular relates to a preparation method of magnesium halide nanospheres. Background technique [0002] Magnesium chloride has good whiteness and strong activity. Magnesium chloride nano-microspheres also have the characteristics of ultrafineness. They can be used as paper fillers to improve the whiteness of paper and improve the fire resistance of paper; magnesium chloride is an excellent flame-retardant material. It does not burn, does not produce toxic and harmful substances, and has no side effects on the environment; magnesium chloride is added to the base material as a filler, which not only plays a role in flame retardancy, but also enhances the mechanical strength of the base material; spherical MgCl 2 The particles can also be used as a catalyst carrier, usually used to prepare MgCl 2 The method of spherical carrier has spraying m...

Claims

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Application Information

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IPC IPC(8): C01F5/26
Inventor 黄启谷刘伟娇豆秀丽张新莉刘智黄海兵杨万泰
Owner BEIJING UNIV OF CHEM TECH
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