Method for preparing highly-dispersed magnesium hydroxide by magnesium salt

A magnesium hydroxide, high-dispersion technology, applied in the direction of magnesium hydroxide, dyeing low-molecular organic compound treatment, fibrous fillers, etc., can solve the problems of harsh conditions, easy agglomeration of magnesium hydroxide products, high production costs, etc., and meet the reaction conditions Mild, easy for industrial production, uniform size effect

Inactive Publication Date: 2015-11-18
韦海棉
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to invent a method for preparing highly dispersed magnesium hydroxide from magnesium salts in view of the problems of high production cost, harsh conditions, and easy agglomeration of magnesium hydroxide products in the prior art

Method used

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Examples

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Embodiment 1

[0023] A method for preparing highly dispersed magnesium hydroxide from a magnesium salt, comprising the following steps:

[0024] S1. Add water into the reaction vessel as the substrate solution, add a dispersant, and stir at room temperature for 10 minutes;

[0025] S2, the preparation concentration is the inorganic magnesium salt solution and the inorganic lye of 1mol / L, under normal temperature stirring, the described magnesium salt and lye are added in the S1 reactant synchronously, control n(Mg 2+ ): n(OH - )=1:2, adjust the pH value at the end point to 11, heat up to 70-80°C after feeding, keep stirring for 20 minutes;

[0026] S3, after adding a modifier to the S2 product, aging at room temperature for 1 hour;

[0027] S4, suction filter the product of S3, wash the filter cake with deionized water, and dry it.

[0028] The dispersant polyethylene glycol in the S1.

[0029] The added amount of the dispersant in the S1 is 0.1% of the weight of the theoretically forme...

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Abstract

The invention relates to the chemical field of inorganic salt and discloses a method for preparing highly-dispersed magnesium hydroxide by magnesium salt. By adopting a synchronous feeding method and inorganic magnesium salt and inorganic alkaline liquor as raw materials, the pH value is controlled to obtain a magnesium hydroxide mixed liquid; and the magnesium hydroxide liquid is aged, suction-filtered, washed and dried to prepare magnesium hydroxide powder. By using water as a substrate and synchronously adding the inorganic magnesium salt and inorganic alkaline liquor, the local concentration of the reactant can be effectively reduced so as to prevent magnesium hydroxide from forming a colloid. The obtained magnesium hydroxide powder is small in grain size and uniform in size and is highly dispersed. The method disclosed by the invention is simple in synthetic process, mild in reaction condition and convenient for industrial production.

Description

technical field [0001] The invention relates to the field of inorganic salt chemical industry, in particular to a method for preparing highly dispersed magnesium hydroxide from magnesium salt. Background technique [0002] The wide application of polymer materials such as plastics and rubber has brought great convenience to people's lives, but at the same time, the problem of flammability has also become a hot spot of concern, forcing the requirements for flame retardancy of these materials. Magnesium hydroxide is an environmentally friendly flame retardant that is developing rapidly at present. It has the advantages of good thermal stability, no toxic gas, and low price. After being added to plastic products, it has flame retardancy, smoke elimination, and anti-dripping. , filling and other functions, compared with similar inorganic flame retardants, it has better smoke suppression effect. As a functional powder material, nano-magnesium hydroxide has become one of the gree...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/14C09C1/02C09C3/08
Inventor 韦海棉
Owner 韦海棉
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