Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing high-purity aluminum hydroxide powder by electrochemical method

An aluminum hydroxide, high-purity technology, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of high raw material preparation cost, difficult particle size, complicated process operation, etc., and achieves favorable environmental protection, simple preparation process, and strong scale benefit. Effect

Active Publication Date: 2016-01-06
成都华泽晶体材料有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have their own characteristics, and the above methods all have problems to be solved such as high cost of raw material preparation, difficulty in particle size control, complicated process operation, and pollution to the environment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the high-purity aluminum hydroxide in this embodiment is carried out according to the following steps: surface-treating the high-purity aluminum plate, and purifying the electrolyte solution containing 200 g / L of choline chloride. The surface-treated high-purity aluminum plate is placed in the purified electrolyte as the cathode and anode at the same time, the pH is 7-8, and the current density is 3A / dm 2 , the temperature is 60°C, and the mechanical stirring gas supply volume is 800L / min. Electrolytic aluminum plate. When the precipitation content in the electrolyte reaches 28%, filter the bath to obtain aluminum hydroxide powder; wash the aluminum hydroxide powder, put it into a high-pressure container, and add high-purity water, seeds and filter cake weight 5% citric acid; under the conditions of 200°C and 12kg pressure, hydrothermal treatment was carried out at constant temperature for 6 hours; the amount of high-purity water was 4 times th...

Embodiment 2

[0029] The preparation method of the high-purity aluminum hydroxide of the present embodiment is carried out according to the following steps:

[0030] The high-purity aluminum plate is subjected to surface treatment, and the electrolyte solution containing 400 g / L of benzyltrimethylammonium chloride is purified. Put the surface-treated high-purity aluminum plate as the cathode and anode in the purified electrolyte at pH 8-10; current density 1A / dm 2 , the temperature is 40°C, and the mechanical stirring gas supply volume is 100L / min to electrolytic aluminum plate. When the precipitation content in the electrolyte reaches 15%, filter the bath to obtain aluminum hydroxide powder; wash the aluminum hydroxide powder, put it into a high-pressure container, and add high-purity water, crystal seeds and aluminum hydroxide powder 5% by weight of citric acid, at a temperature of 100 ° C and a pressure of 10 kg, the hydrothermal treatment was carried out at a constant temperature for 1...

Embodiment 3

[0033] The preparation method of the high-purity aluminum hydroxide of the present embodiment is carried out according to the following steps:

[0034] The high-purity aluminum plate is subjected to surface treatment, and the electrolyte solution containing 400 g / L of benzyltriethylammonium chloride is purified. Put the surface-treated high-purity aluminum plate as the cathode and anode in the purified electrolyte at pH 8-10; current density 5A / dm 2 ; The temperature is 90 ℃; the electrolytic aluminum plate is under the condition of air stirring and air supply of 1000L / min. When the content of aluminum hydroxide powder in the electrolyte reaches 30%, filter the bath to obtain aluminum hydroxide powder; wash the aluminum hydroxide powder, put it into a high-pressure container, and add high-purity water, seed crystals and hydrogen 10% tartaric acid by weight of alumina powder, at a temperature of 300 ° C; under the condition of 87 kg pressure, hydrothermal treatment is carried ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing high-purity aluminium hydroxide powder by an electrochemical method. The high-purity aluminium hydroxide powder is obtained by electrolyzing a high-pure aluminium plate in a purified electrolyte solution, washing the electrolytic product with high-purity water, performing hydrothermal treatment, washing and drying. The purity ranges from 99.9%-99.999%. The preparation process for the high-purity aluminium hydroxide powder having good dispersibility is simple, has high yield and good product stability, has no pollutions to the environment, and is easy for large-scale production. The prepared high-purity aluminium hydroxide powder is widely used in a plurality of fields of chemical industry, coatings, buildings, traffics, electric appliances, etc.

Description

technical field [0001] The invention relates to a method for preparing high-purity aluminum hydroxide powder by an electrochemical method. Background technique [0002] High-purity aluminum hydroxide is a superfine powder product with high added value, and its purity is 99.9%~99.999%. It can be used as a paper-making filler, a whitening agent and a brightening agent for paper, and can also be applied to flame-retardant fillers such as rubber and resin, and a flocculant for urban water supply. It has been widely used as a new type of functional material and structural material in chemical, Coatings, construction, transportation and electrical appliances and other fields. In recent years, the application of high-purity aluminum hydroxide as an inorganic flame retardant has made great progress, and it has become the most widely used flame retardant in the world. However, the preparation technology of high-purity aluminum hydroxide is relatively slow, and there are still many ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00
Inventor 黄克宙李声泽李旻岳永刚何明利
Owner 成都华泽晶体材料有限公司