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Preparation method of nano magnesium hydroxide material

A nano-magnesium hydroxide and magnesium salt technology, applied in the direction of magnesium hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of corrosion of reaction equipment, high equipment cost, and harsh requirements for equipment and equipment, and achieve low corrosion and low equipment requirements. Simple, life-extending effect

Inactive Publication Date: 2015-04-22
SHIHEZI UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method for preparing a nano-magnesium hydroxide material, the main purpose of which is to solve the problem that the existing method for preparing a nano-magnesium hydroxide material will cause serious corrosion of the reaction equipment or require harsh equipment and equipment costs. The problem

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  • Preparation method of nano magnesium hydroxide material
  • Preparation method of nano magnesium hydroxide material
  • Preparation method of nano magnesium hydroxide material

Examples

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Embodiment 1

[0029] Step 1, preparing the precursor solution;

[0030] Weigh 250g of magnesium chloride and 50g of Tween 80, and add 1000mL of deionized water. After the mixture was fully stirred for 0.5 hours in a pipeline type high-shear mixer, a well-dispersed transparent solution was obtained as a precursor solution.

[0031] Step 2, preparing the precursor;

[0032] Add 7.5g of phosphoric acid to the precursor solution, and feed in ammonia gas at a flow rate of 5L / h; the reaction temperature is 100°C, and the high-shear mixer is used to stir at a speed of 10,000rpm. After 2 hours of reaction, filter to obtain the precursor .

[0033] Step 3, drying the precursor obtained in step 2 at 120° C. for 5 hours in a forced air drying oven, and the obtained white powder product is a nano-magnesium hydroxide material. If the temperature of the drying oven is too low, the drying time will be longer; if the temperature of the drying oven is too high, magnesium hydroxide will be decomposed into...

Embodiment 2

[0036] Step 1, preparing the precursor solution;

[0037] Weigh 250g of magnesium sulfate and 20g of Tween 80, and add 1000mL of deionized water. After the mixture was fully stirred for 0.5 hours in a pipeline type high-shear mixer, a well-dispersed transparent solution was obtained as a precursor solution.

[0038] Step 2, preparing the precursor;

[0039] Add 15g of phosphoric acid to the precursor solution, and feed in ammonia gas at a flow rate of 5L / h; the reaction temperature is 100°C, the rotation speed of the mixer is 10000rpm, and after 2 hours of reaction, filter to obtain the precursor.

[0040] Step 3, drying the precursor obtained in step 2 at 120° C. for 5 hours in a forced air drying oven, and the obtained white powder product is a nano-magnesium hydroxide material.

Embodiment 3

[0042] Step 1, preparing the precursor solution;

[0043] Weigh 250g of magnesium nitrate and 100g of Tween 80, and add 1000mL of deionized water. After the mixture was fully stirred for 0.5 hours in a pipeline type high-shear mixer, a well-dispersed transparent solution was obtained as a precursor solution.

[0044] Step 2, preparing the precursor;

[0045] Add 15g of phosphoric acid to the precursor solution, and feed in ammonia gas at a flow rate of 5L / h; the reaction temperature is 100°C, the rotation speed of the mixer is 10000rpm, and after 2 hours of reaction, filter to obtain the precursor.

[0046] Step 3, drying the precursor obtained in step 2 at 120° C. for 5 hours in a forced air drying oven, and the obtained white powder product is a nano-magnesium hydroxide material. In this example, because the added surfactant content is too high, a large amount of foam will be generated during the reaction, which is not conducive to the formation of the precursor, and the r...

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Abstract

The invention discloses a preparation method of a nano magnesium hydroxide material, relates to the technical field of preparation of nano materials, and solves the problems that the existing nano magnesium hydroxide material preparation method causes severe corrosion to reaction equipment, has strict requirements for instruments and equipment and is high in equipment cost. The main technical scheme of the invention is as follows: the preparation method of a nano magnesium hydroxide material comprises the following steps: 1. preparing a precursor liquid: dissolving magnesium salt and surfactant in solvent, and homogenizing the obtained mixture through a pipeline type high-shear mixer to obtain the precursor solution; 2. preparing a precursor: introducing ammonia gas into the precursor solution obtained in the step 1, adding crystal form control agent into the precursor solution while stirring, and reacting to obtain the precursor; and 3. heating the precursor obtained in the step 2 at 60-300 DEG C to obtain the nano magnesium hydroxide material.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method of nanometer magnesium hydroxide material. Background technique [0002] Nano-magnesium hydroxide is a new type of inorganic smoke-extinguishing and flame-retardant filler developed in recent years. It has the advantages of good thermal stability, non-volatility, no toxic gas generation, no corrosion of processing equipment, and low price. The product has a nano-scale size, a theoretical strength close to the interatomic bond, and excellent physical and chemical properties. Nano-magnesium hydroxide is widely used in building materials, thermal insulation materials, flame-retardant plastic decoration materials, foam thermal insulation materials, household appliances and office equipment, etc. Acids, adsorbents. [0003] At present, the preparation method of magnesium hydroxide nanomaterials is mainly to use magnesium chloride and alkali reac...

Claims

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Application Information

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IPC IPC(8): C01F5/20B82Y30/00
Inventor 代斌于锋朱明远张金利
Owner SHIHEZI UNIVERSITY
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