Preparation method of nanometer aluminium hydroxide and application thereof

A nano-aluminum hydroxide, crystal seed technology, applied in the direction of alumina/aluminum hydroxide, can solve the problems of product quality and particle size difficult to control, and achieve the effects of bright colors, excellent adhesion and stability.

Active Publication Date: 2010-06-23
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is simple and easy to use through the sol-gel method, the quality and particle size of the product a

Method used

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  • Preparation method of nanometer aluminium hydroxide and application thereof
  • Preparation method of nanometer aluminium hydroxide and application thereof
  • Preparation method of nanometer aluminium hydroxide and application thereof

Examples

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preparation example Construction

[0029] Preparation of Nano Aluminum Hydroxide

[0030] The present invention prepares the rough steps of nano aluminum hydroxide:

[0031] 1) Preparation of seed crystals

[0032] The preparation of seed crystals adopts the hydrolysis of aluminum methylate, and the hydrolysis of aluminum trimethoxide is carried out according to the following equation:

[0033] (CH 3 O) 3 Al+2H 2 O→AlOOH+3CH 3 Oh

[0034] The hydrolysis is carried out at a pH value of 2-4 and a temperature of 30-70°C.

[0035] 2) Post-treatment of seed crystals

[0036] The hydrolyzed aluminum hydroxide is washed several times by a high-speed centrifuge.

[0037] The washed intermediate product is dried by spray drying.

[0038] The dried powder is prepared into a 30% dispersion liquid, and then ground to 10-50nm by a double-barrel circulating nano-sand mill, and the nano-particles can be used as crystal seeds.

[0039] 3) adding inorganic aluminum salt and basic compound to the seed crystal for react...

Embodiment 1

[0053] In a 2-ton reactor, add 1.6 tons of water, start stirring and add 0.4 tons of aluminum methoxide, and then add about 40 kg of sulfuric acid to adjust the pH to 3.5. The temperature was raised to 50°C while stirring, and the reaction was carried out for 8 hours. Cool down to room temperature, discharge the material into a high-speed centrifuge for washing, and dehydrate. After the water is removed, add 1 ton of water for washing, and the washing can be completed by doing this 3 times. The dehydrated intermediate product was placed in a 3-ton stainless steel container, added with 2 tons of water to disperse for 1 hour, and dried by spray drying. The dried powder is mixed with water to make a 30% dispersion liquid, which is directly fed into a double-barrel circulating nano sand mill through a pipeline, and ground to a size of 10-50 nm, and the nano particles can be used as crystal seeds.

[0054] Add 1 ton of water into a 15-ton reactor, and add 0.2 tons of nano-aluminu...

Embodiment 2

[0059] Prepare nano-aluminum hydroxide seed and final nano-aluminum hydroxide product substantially by the same method described in Example 1, but differ from Example 1: the concentration of aluminum methylate increases to some extent, adds 0.8 ton in 1.6 tons of water of aluminum methoxide.

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Abstract

The invention discloses a preparation method of nanometer aluminium hydroxide, which adopts organic aluminium to hydrolyze and generate nanometer aluminium hydroxide; then the nanometer aluminium hydroxide is served as seed crystal, and inorganic aluminum salt is used for industrially producing nanometer aluminium hydroxide on a large scale so as to effectively ensure the stability of sintetics seed crystal. Organic aluminium can choose aluminium methoxide which has low cost and is easy to synthetize; inorganic salt can be served as basic sintetics, thus greatly lowering raw material cost; the obtained nanometer aluminium hydroxide has favourable dispersibility after modified by silane coupling agent. The nanometer aluminium hydroxide produced with the preparation method of the invention is served as inkjet printing media to ensure that color ink jet printing paper has the characteristics of water resistance, high ink adsorption speed, high gloss, bright color and the like; the nanometer aluminium hydroxide also can be served as the main component to be used in inorganic/organic composite coating, so that the coating has excellent adhesive force, hardness, corrosion resistance and the like.

Description

technical field [0001] The invention relates to a preparation method of a powder material, more specifically, the invention relates to a preparation method of nano aluminum hydroxide and its application. technical background [0002] In recent years, with the rapid popularization of digital products such as digital cameras and color printers, people's demand and dependence on digital products have become more and more intense. At present, color digital printing is mainly divided into two categories: inkjet printing and color laser printing. Ink printing has the characteristics of high printing quality, waterproof, and anti-fading after using special printing media, and has become the most high-end product in digital printing media, and gradually replaces traditional photos. [0003] At present, the inorganic pigments used in high-grade inkjet printing ink-absorbing media mainly include silicon-based products and aluminum-based products. Silicon-based products appeared earli...

Claims

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Application Information

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IPC IPC(8): C01F7/02
Inventor 潘晓兵李生祥
Owner GUANGZHOU HUMAN CHEM
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