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Method for preparing high-activity aluminum oxide powder using aluminum ash

A kind of aluminum oxide powder, high activity technology, applied in the direction of alumina/hydroxide, etc., can solve the problems of high energy consumption, low recovery rate of aluminum ash, large powder particles, etc., to solve the problem of environmental pollution and realize sustainable Sustained utilization and uniform particle size distribution

Inactive Publication Date: 2016-07-06
CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the disadvantages of low recovery rate of aluminum ash treatment, high energy consumption, environmental pollution, and the aluminum oxide powder produced by the current method has large particles, wide particle size distribution and easy agglomeration , provides a kind of aluminum ash as raw material, water floats to remove slag, adds sulfuric acid solution and diisopropanolamine to remove insoluble matter in aluminum ash, and then removes dissolved potassium hydroxide under the action of carbon disulfide and titanium dioxide For other metal impurities, add polyethylene glycol and ammonia water and stir to obtain a jelly, then wash, dry, calcinate, and pulverize to obtain a high-activity alumina powder.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First put the aluminum ash into the container, add water to it to submerge the aluminum ash by 5cm, then use the agitator to stir it at a speed of 300r / min for 20min, then let it stand until no sediment sinks, and remove the impurities floating on the water surface , and then filter it under reduced pressure, rinse the filtrate with absolute ethanol for 3 times, then put the filtered aluminum ash in an oven to dry; then put the above-mentioned 200g of dried aluminum ash into a 1L container, pour Add a sulfuric acid solution with a mass fraction of 40%, stir until the solid is no longer dissolved, stop adding the sulfuric acid solution, then filter, collect the filtrate, add diisopropanolamine with 5% aluminum ash mass, and heat the 1L container to 60°C and keep warm for 50min; after the above keep warm, stop heating, add potassium hydroxide solution with a mass fraction of 20% to it, adjust the pH to 12.0, then move the 1L container to an ice bath, and set the temperatur...

example 2

[0019]First, put the aluminum ash into the container, add water to it to submerge the aluminum ash by 6cm, then use the agitator to stir it at 400r / min for 23min, then let it stand until no sediment sinks, and remove the impurities floating on the water surface , and then filter it under reduced pressure, rinse the filtrate with absolute ethanol for 4 times, then put the filtered aluminum ash in an oven to dry; then put the above-mentioned 250g of dried aluminum ash into a 1L container, pour Add a sulfuric acid solution with a mass fraction of 40%, stir until the solid is no longer dissolved, stop adding the sulfuric acid solution, then filter, collect the filtrate, add diisopropanolamine with an aluminum ash mass of 7%, and heat the 1L container to 63°C and keep warm for 60min; after the above keep warm, stop heating, add potassium hydroxide solution with a mass fraction of 20% to it, adjust the pH to 12.5, then move the 1L container to an ice bath, and set the temperature to ...

example 3

[0021] First put the aluminum ash into the container, add water to it to submerge the aluminum ash by 7cm, then use the agitator to stir it at a speed of 500r / min for 25min, then let it stand until no sediment sinks, and take out the impurities floating on the water surface , and then filter it under reduced pressure, rinse the filtrate with absolute ethanol for 5 times, then put the filtered aluminum ash in an oven to dry; then put the above-mentioned 300g of dried aluminum ash into a 1L container, Add a sulfuric acid solution with a mass fraction of 40%, stir until the solid is no longer dissolved, stop adding the sulfuric acid solution, then filter, collect the filtrate, add diisopropanolamine with an aluminum ash mass of 8%, and heat the 1L container to 65°C and keep warm for 70min; after the above keep warm, stop heating, add potassium hydroxide solution with a mass fraction of 20% to it, adjust the pH to 13.0, then move the 1L container to an ice bath, and set the tempera...

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Abstract

The invention discloses a method for preparing high-activity aluminum oxide powder using aluminum ash, and belongs to the preparation field of aluminum oxide powder. The method comprises the following steps: by using aluminum ash as a raw material, floating in water to remove slag, adding sulfuric acid solution and diisopropanolamine to remove insoluble matters in the aluminum ash, and then removing other metal impurities soluble in potassium hydroxide under the effect of carbon disulfide assisted by titanium dioxide, adding polyethylene glycol and ammonia water, stirring, filtering to obtain jelly, washing, drying, calcinating, and crushing to obtain the high-activity aluminum oxide powder. The method disclosed by the invention has the beneficial effects that aluminum ash is sufficiently utilized to prepare the high activity aluminum oxide powder, not only the environment pollution problem is solved, but also the sustainable utilization of the resource is realized; the prepared aluminum oxide powder is small in grain, uniform in grain size distribution and hard to unite, and the activity is more than or equal to 18% higher than that of the aluminum oxide powder prepared by other methods.

Description

technical field [0001] The invention relates to a method for preparing high-activity alumina powder by using aluminum ash, which belongs to the field of alumina powder preparation. Background technique [0002] Alumina powder has excellent physical, chemical, optical, mechanical and thermal properties, and has been widely used in many fields such as chemical industry, electronics, machinery, special ceramics, etc. Its important role in lighting and peninsula industry is also becoming more and more prominent. At present, there are many methods for preparing ultrafine alumina, which are mainly divided into solid-phase method, gas-phase method, liquid-phase method and organic alcohol salt hydrolysis method according to the reaction principle. However, each method has its own limitations. For example, the solid-phase method has complex processes, expensive alkoxides, it is difficult to prepare small particles less than 100nnl, and the particle crystal form is not ideal; the gas-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
CPCC01F7/02C01P2004/62C01P2006/11C01P2006/12
Inventor 王力威盛艳花宋国
Owner CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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