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Method for producing metal compound by waste zinc-manganese dioxide dry cell

A zinc-manganese dry battery, metal compound technology, applied in the direction of manganese compound, zinc compound, lead compound, etc., can solve the problems of unrecoverable, waste, pollution, etc.

Inactive Publication Date: 2004-09-22
于之涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method also has pollution, and the amount of metallic zinc obtained is also very little
In addition, other useful things in dry batteries cannot be recycled, which also causes waste

Method used

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Embodiment Construction

[0014] Below in conjunction with embodiment the present invention is described in further detail:

[0015] First, remove the copper cap on the positive electrode, the iron sheet of the negative electrode and the outer packaging of the used zinc-manganese dry battery, then put the dry battery into a container with a concentration of 30% hydrochloric acid solution, and react at room temperature for 1 to 2 hours. The zinc cylinder in the dry battery reacts with hydrochloric acid to produce hydrated zinc chloride. The zinc plate of the dry battery contains 1% lead and 0.6% cadmium. Lead does not react with hydrochloric acid, and cadmium reacts slowly with hydrochloric acid. When zinc is excessive, cadmium It will be replaced by zinc to form microcrystalline lead and cadmium precipitates; after the dry battery is discharged, the ammonium chloride and zinc chloride in the electrolyte will form zinc hydroxychloride and zinc amino chloride, zinc hydroxychloride and amino zinc chloride ...

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PUM

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Abstract

A process for preparing metallic compound from the used dry Zn-Mn batteries includes such steps as electrolyzing, filtering and crystallizing to obtain zinc chloride, Mn2O3, lead sulfate and cadmium sulfate. Its advantage is no pollution in its process.

Description

Technical field: [0001] The invention relates to a chemical method, in particular to a method for producing metal compounds using waste zinc-manganese dry batteries. Background technique: [0002] Now, after the zinc-manganese dry batteries sold on the market are used, there are special recycling sites, but after recycling, because the dry batteries contain lead and cadmium, there will be pollution after treatment, so they cannot be disposed of. As time goes by, the number of waste dry batteries recycled increases. How to dispose of these used dry batteries will be an urgent problem to be solved. At present, there is a method that uses a drill to separate the zinc, copper and manganese cores of waste dry batteries, and after removing the carbon bag waste, metal zinc can be obtained. But this method also has pollution, and the amount of metal zinc obtained is also very small. In addition, other useful things in dry batteries cannot be recycled, which also causes waste. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C01G9/00C01G11/00C01G21/00C01G45/00
Inventor 于福东
Owner 于之涛
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