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Method for manufacturing nanometer alumina by using precipitate generated from aluminum-air battery discharge

A nano-alumina and air battery technology, applied in the energy field, achieves the effects of simple preparation process, reduced operating cost, and realization of waste utilization

Inactive Publication Date: 2016-02-03
DONGSHEN METAL FUEL POWER LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the production of nano-alumina from the precipitate generated by the discharge of aluminum-air batteries.

Method used

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  • Method for manufacturing nanometer alumina by using precipitate generated from aluminum-air battery discharge
  • Method for manufacturing nanometer alumina by using precipitate generated from aluminum-air battery discharge
  • Method for manufacturing nanometer alumina by using precipitate generated from aluminum-air battery discharge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Produce nano-alumina (α-Al 2 o 3 ) method, comprising the steps of:

[0031] 1) Put an appropriate amount of the precipitate generated by the discharge of the aluminum-air battery into the container, add distilled water and stir thoroughly, and then let it stand still. Place, and then remove the supernatant in the container after precipitation; repeat the above operation several times until the pH value of the supernatant is close to neutral, after cleaning, remove the supernatant, filter, and dry to obtain a precipitate;

[0032] 2) Weigh 16 grams of the precipitate obtained in step 1) and put it into a container, then add 200 ml of sulfuric acid aqueous solution (which contains 72 grams of pure sulfuric acid) into the container, heat and stir to dissolve the precipitate, and filter to obtain an aqueous aluminum sulfate solution; The weight ratio of adding pure sulfuric acid to the precipitate described in step 1) is 4.5:1

[0033] 3) Add 26 grams of a...

Embodiment 2

[0042] Nano-alumina (α-Al 2 o 3 ) method, comprising the steps of:

[0043] 1) with embodiment 1 step 1);

[0044] 2) Take by weighing 3 grams of the precipitate obtained in step 1) and put it into a container, then add an aqueous sulfuric acid solution (containing 16 grams of pure sulfuric acid) into the container, heat and stir to dissolve the precipitate, filter to obtain an aqueous aluminum sulfate solution; add The weight ratio of pure sulfuric acid to precipitate is 5.3:1

[0045] 3) Put 9 grams of ammonium carbonate into a beaker, add 100ml of distilled water, stir to dissolve it, adjust the pH value to 9 with ammonia water to obtain an aqueous ammonium carbonate solution, and add the aluminum sulfate aqueous solution obtained in step 2) to the pH value while stirring. In the ammonium carbonate aqueous solution of 9, a white precipitate is generated, filtered, and dried to obtain ammonium aluminum carbonate; the weight ratio of adding ammonium carbonate to the precip...

Embodiment 3

[0053] Nano-alumina (α-Al 2 o 3 ) method, comprising the steps of:

[0054] 1), 2) with embodiment 2 1), 2);

[0055] 3) the ammonium carbonate aqueous solution (ammonium carbonate is 9 grams) that pH is 9 is added in the aluminum sulfate aqueous solution that step 2) obtains under agitation condition, generate precipitation, centrifugal separation, dry, obtain aluminum ammonium carbonate; Said ammonium carbonate With step 2) the weight ratio control of described sediment (3 grams) is 3:1;

[0056] 4) Put the ammonium aluminum carbonate obtained in step 3) into an electric furnace, raise the temperature to 1200°C and keep it for 120 minutes for calcination, and cool to room temperature to prepare α-Al 2 o 3 Nano alumina material.

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Abstract

The present invention discloses a method for manufacturing nanometer alumina by using precipitate generated from aluminum-air battery discharge. The method comprises: 1) washing precipitate generated from aluminum-air battery discharge with water to achieve a neutral state, filtering, and drying to obtain a precipitate; 2) heating the precipitate and a sulfuric acid aqueous solution, dissolving, and filtering to obtain an aluminum sulfate aqueous solution; 3) adding ammonium sulfate to the aluminum sulfate aqueous solution, dissolving, evaporating the water to obtain an ammonium aluminum sulfate oversaturation solution, and cooling to a room temperature to obtain an ammonium aluminum sulfate crystal; and 4) calcining the ammonium aluminum sulfate crystal, and cooling to a room temperature to obtain the nanometer alumina. According to the present invention, the purity of the manufactured nanometer alumina is high, and the particle size distribution is uniform; the waste utilization is achieved; the aluminum-air battery operating cost is reduced; the technology has characteristics of simple process, energy saving, and environmental protection; the manufactured nanometer alumina material has high purity and uniform particle size; and the waste utilization is achieved, and the aluminum-air battery operating cost is substantially reduced.

Description

technical field [0001] The invention belongs to the technical field of energy, in particular to a method for producing nano-alumina by using the precipitate generated by the discharge of an aluminum-air battery as a raw material. technical background [0002] Aluminum-air battery is a kind of metal fuel cell with aluminum alloy as negative electrode, air electrode as positive electrode, and neutral or alkaline aqueous solution as electrolyte. During the operation of the aluminum-air battery, the aluminum alloy negative electrode and the oxygen in the air are consumed to output electric energy. As the discharge process proceeds, deposits are formed in the electrolyte of the Al-air battery. At present, there is no report on the production of nano-alumina from the precipitate generated by the discharge of aluminum-air batteries. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a method f...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y40/00
Inventor 王旭
Owner DONGSHEN METAL FUEL POWER LAB CO LTD
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