Recycling process of sodium aluminate solution in aluminum-air battery preparation process

An air battery and preparation process technology, which is applied in the preparation of alumina/hydroxide, alkali metal aluminate/alumina/aluminum hydroxide, etc., can solve problems such as aluminum overcapacity and the downturn in the electrolytic aluminum industry, and achieve The technological process is simple, the cost is reduced, and the effect of resource recycling is realized

Inactive Publication Date: 2015-04-08
云南冶金集团创能金属燃料电池股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of aluminum overcapacity and the increasingly sluggish electrolytic aluminum industry, and realize the resource cycle of the aluminum industry chain

Method used

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  • Recycling process of sodium aluminate solution in aluminum-air battery preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (2) The sand-like aluminum hydroxide obtained by decomposing the seed crystals is transformed into sand-like alumina at a high temperature of 1100°C at a calcination temperature, and enters the electrolytic aluminum system.

[0015] (3) After the purified mother liquor is added with a certain amount of alkaline electrolyte and corrosion inhibitor, it can be used as a fresh electrolyte and reused in the battery system to realize the recycling of waste electrolyte sodium aluminate solution.

[0016] Example 2

Embodiment 2

[0018] (2) The sand-like aluminum hydroxide obtained by decomposing the seed crystals is transformed into sand-like alumina at a high temperature of 1100°C at a calcination temperature, and enters the electrolytic aluminum system.

[0019] (3) After the purified mother liquor is added with a certain amount of alkaline electrolyte and corrosion inhibitor, it can be used as a fresh electrolyte and reused in the battery system to realize the recycling of waste electrolyte sodium aluminate solution.

[0020] Example 3

Embodiment 3

[0022] (2) The sand-like aluminum hydroxide obtained by decomposing the seed crystals is transformed into sand-like alumina at a high temperature of 1200°C and enters the electrolytic aluminum system.

[0023] (3) After the purified mother liquor is added with a certain amount of alkaline electrolyte and corrosion inhibitor, it can be used as a fresh electrolyte and reused in the battery system to realize the recycling of waste electrolyte sodium aluminate solution.

[0024] Example 4

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Abstract

The invention discloses a recycling process of a sodium aluminate solution in an aluminum-air battery preparation process. The process comprises the following steps: firstly, adding adsorbent activated carbon to a 155g / l waste electrolyte sodium aluminate solution, filtering, purifying, and carrying out crystal seed precipitation, thus achieving separation of sandy aluminum hydroxide and purified mother liquid; controlling the reaction time of preparation of sandy aluminum hydroxide to be 2-8 hours, the decomposition temperature to be 50-80 DEG C, the causticity ratio to be 1.53, the seed ratio to be 0.35, the stirring speed to be 75-150rpm, and the agglomerative efficiency to be 90%-350%, so as to prepare sandy aluminum hydroxide; carrying out high-temperature transformation on sandy aluminum hydroxide which is decomposed by crystal seed precipitation at the calcination temperature of 1,000-1200 DEG C; and feeding to an electrolytic aluminum system. The purified mother liquid can be reused in a battery system as a fresh electrolyte after being supplied with a certain amount of alkaline electrolyte and a corrosion inhibitor, and thus recycling of the waste electrolyte sodium aluminate solution is achieved.

Description

technical field [0001] The invention relates to a recycling process of sodium aluminate solution in the preparation process of an aluminum-air battery. Background technique [0002] Due to the limitation of fossil energy and the environmental pressure caused by the use of fossil energy, it is an urgent problem for governments and scientific researchers to develop new energy to replace fossil energy. Batteries are favored by researchers from all over the world due to their clean, safe, and economical properties. Compared with the lead-acid batteries, nickel batteries, lithium-ion batteries, zinc batteries and metal batteries with Mg, Fe and other metals as anodes that are currently popular in the market, aluminum-air batteries have high energy density, high power density, and work The voltage is stable, the negative electrode uses metal aluminum alloy, rich in resources, environment-friendly, easy to prepare, the materials in the battery do not involve toxic and harmful subs...

Claims

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Application Information

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IPC IPC(8): C01F7/30
CPCC01F7/14
Inventor 谢刚田永徐庆鑫和晓才李怀仁胥富顺李晓阳魏可崔涛袁野柯浪徐俊毅姚云田林赖浚
Owner 云南冶金集团创能金属燃料电池股份有限公司
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