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Micro-powder aluminum hydroxide preparation method and device and micro-powder aluminum hydroxide

A technology of aluminum hydroxide and micropowder, applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, purification of aluminate/alumina/aluminum hydroxide, alumina/aluminum hydroxide, etc., can solve the problem of oil absorption High rate, high sodium oxide content, poor processing performance and other problems, to achieve the effect of stable product quality

Active Publication Date: 2016-07-20
中铝山东新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the seeds used in the existing process conditions are finely ground aluminum hydroxide or amorphous seed liquid obtained by neutralization reaction. Wider, higher oil absorption rate, higher sodium oxide content, users generally show poor processing performance during use, and need to be further improved and improved

Method used

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  • Micro-powder aluminum hydroxide preparation method and device and micro-powder aluminum hydroxide

Examples

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Embodiment 1

[0052] See attached figure 1 , the preparation method of micropowder aluminum hydroxide provided by Example 1 of the present invention comprises the following steps:

[0053]Step S1: adding aluminum hydroxide seeds obtained through carbonation and decomposition of the sodium aluminate solution to the sodium aluminate solution, performing temperature-variable seed decomposition to obtain a decomposed slurry;

[0054] Step S2: removing iron in the decomposed slurry to obtain a first intermediate product;

[0055] Step S3: After washing the first intermediate product, depolymerize it to obtain the second intermediate product;

[0056] Step S4: removing the moisture in the second intermediate product to obtain the third intermediate product;

[0057] Step S5: Dispersing and classifying the third intermediate product to produce micronized aluminum hydroxide.

[0058] The mass percentages of each component of the micropowder aluminum hydroxide prepared by the preparation method o...

Embodiment 2

[0067] See attached figure 2 , The micropowdered aluminum hydroxide preparation equipment provided by Example 2 of the present invention includes a decomposition tank, an iron removal device, a first washing device, a depolymerization device, a water removal device, a dispersion and a classification device, and the decomposition tank is used to accommodate sodium aluminate The solution and the aluminum hydroxide seed obtained through the carbonation and decomposition of the sodium aluminate solution are used to decompose the sodium aluminate solution at variable temperatures to obtain the decomposed slurry; the iron removal device is used to decompose the iron in the slurry to obtain the first Intermediate product; the first washing device is used for washing the first intermediate product; the depolymerization device is used for depolymerizing the washed first intermediate product to obtain the second intermediate product; the water removal device is used for removing the moi...

Embodiment 3

[0078] See attached image 3 , the micropowder aluminum hydroxide provided in Example 3 of the present invention is prepared using the micropowder aluminum hydroxide preparation equipment provided in Example 2 of the present invention, and is prepared by the preparation method of micropowder aluminum hydroxide provided in Example 1 of the present invention, and the parameters of micropowder aluminum hydroxide As follows: the mass percentages of each component are: Fe 2 o 3 : 0.008%, Na 2 O: 0.086%, Na 2 o (s) : 0.009%, SiO 2 : 0.01%; whiteness: 98.2%; D50: 1.26μm; water attached: 0.209%; oil absorption: 33; D90: 1.1.97μm.

[0079] The preparation method of the micropowder aluminum hydride used in Examples 4-20 of the present invention is the same as the preparation method of the micropowder aluminum hydride used in Example 1 or 2 of the present invention, but the operating parameters and result parameters are different; The preparation equipment of the micropowder alumin...

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Abstract

The invention discloses a micro-powder aluminum hydroxide preparation method and device and micro-powder aluminum hydroxide. The preparation method comprises the steps of adding aluminum hydroxide seed crystals obtained through carbonation decomposition of a sodium aluminate solution into the sodium aluminate solution to perform variable-temperature seed decomposition to obtain decomposition slurry; removing iron in the decomposition slurry to obtain a first intermediate product; washing the first intermediate product to depolymerize the first intermediate product to obtain a second intermediate product; removing water in the second intermediate product to obtain a third intermediate product; scattering and grading the third intermediate product to obtain micro-powder aluminum hydroxide. The preparation device comprises a decomposition tank, an iron removing device, a first washing device, a depolymerization device, a water removing device, and a scattering and grading device. The micro-powder aluminum hydroxide is prepared by using the preparation device according to the preparation method, such that the grain distribution of the micro-powder aluminum hydroxide product with a median particle diameter of 1mu m is even, the oil absorption is reduced to 30mL / 100g to 35mL / 100g, the impurity content of the obtained product is low, the whiteness is high and the product quality is stable.

Description

technical field [0001] The invention relates to the technical field of aluminum hydroxide, in particular to a preparation method and equipment for micropowder aluminum hydroxide, and the micropowder aluminum hydroxide. Background technique [0002] Micro-powdered aluminum hydroxide is an environmentally friendly flame-retardant filler, which is mainly used in low-smoke and halogen-free cable materials, composite insulators, copper-clad laminates, foam materials and other industries. In recent years, with the continuous upgrading of national environmental protection policies and the adjustment of industrial structure, emerging industries such as composite insulators, wires and cables, electronic appliances, high-speed rail, and 3G / 4G networks have developed rapidly in China, and there is a strong market demand for low-smoke, halogen-free, environmentally friendly flame retardants. As a low-smoke, halogen-free and environmentally friendly flame retardant with excellent perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/14C01F7/46C01F7/02
CPCC01F7/021C01F7/142C01F7/46C01P2004/03C01P2004/51C01P2004/61C01P2006/19C01P2006/60C01P2006/80C01P2006/82
Inventor 赵善雷马晓宁崔志明冯晓明戚平刘骞
Owner 中铝山东新材料有限公司
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