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Method for preparing Nano powder of alumina from industrial waste

A nano-alumina and industrial waste technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of high price of nano-alumina, limited application and industrialization process, high price, etc., and achieve low cost and fine particle size. , the effect of easy operation

Inactive Publication Date: 2005-11-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the raw materials for large-scale preparation of nano-alumina powder in foreign countries are mostly expensive alkoxides or relatively expensive pure aluminum salts (such as aluminum chloride, aluminum nitrate, etc.), and the cost is high, resulting in the high price of nano-alumina. Limit its application and industrialization process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the technological process and steps of this embodiment are as follows:

[0015] 1. First grind the aluminum-containing waste catalyst into powder, and weigh 51 g of the waste catalyst containing 80% alumina;

[0016] 2. Weigh 346.85g of ammonium hydrogen sulfate, heat and melt on an electric furnace;

[0017] 3. The above-mentioned powder material containing alumina waste catalyst is slowly added to the molten ammonium hydrogen sulfate melt in a small amount of times, and after all the additions are completed, heating is performed to continue the reaction, and the time is 30 minutes;

[0018] 4. After it is naturally cooled to room temperature, add water to fully dissolve it, filter to remove the slag, and take the filtrate. The obtained filtrate was heated and concentrated, cooled and allowed to stand to separate out crystals; the obtained aluminum ammonium sulfate crystals were filtered out, recrystallized for 3 times, and the obtained aluminum ammonium...

Embodiment 2

[0022] Embodiment 2: The technological process and steps of this embodiment and the above-mentioned embodiment 1 are basically the same, and the difference is:

[0023] 1. The industrial waste used is aluminum scrap containing more than 80% of aluminum, and 45g of the scrap aluminum scrap is weighed;

[0024] 2. A small amount of the scrap aluminum scrap was added to the saturated solution made up of 346.85g of ammonium bisulfate for many times;

[0025] 3. Heat the reaction for 1 hour, filter after the reaction, and take the filtrate;

[0026] 4. The filtrate is heated and concentrated, cooled and left to stand to precipitate crystals. Repeat recrystallization 4 times in this way, pulverize the obtained ammonium aluminum sulfate crystals, and dry at 70° C. for 3 hours to obtain high-purity ammonium aluminum sulfate crystals;

[0027] 5. Weigh 23.7 g of ammonium aluminum sulfate and prepare a solution with a concentration of 0.1 mol / L. The concentration of the prepared ammo...

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Abstract

A process for preparing the aluminium oxide nanoparticles from the industrial waste (used Al catalyst or rejected A-alloy) includes grinding, reacting on fused ammonium hydrogen sulfate or its solution, filtering, thermal concentrating, recrystallzing to obtain ammonium aluminium sulfate crystals, preparing its solution, dripping it in the solution of ammonium dicarbonate containing polyethanediol to generate alkaline ammonium aluminium carbonate, drying, and burning.

Description

technical field [0001] The invention relates to a method for preparing nano-alumina powder from industrial waste. It belongs to the field of chemical and chemical technology. Background technique [0002] Nano-alumina material is a nano-material with important application value and development prospect. Nano-alumina has been widely used as heat-resistant material, missile window and high-pressure sodium lamp tube material, computer integrated circuit substrate, wear-resistant material and bioceramic material due to its high hardness, high strength, heat resistance and corrosion resistance. As well as catalysts or catalyst carriers in the petrochemical industry, they can also be used as carriers in automobile exhaust gas treatment. Nano-alumina powder is the raw material for the manufacture of nano-ceramics. Nano-ceramics are hard, wear-resistant and have a certain degree of toughness, and are structural materials with great application prospects. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 张良苗陆文聪陈念贻徐占锋张振
Owner SHANGHAI UNIV
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