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Method for decoating on waste plastic metal

A metal coating and waste plastic technology, applied in the field of waste metal recycling, can solve the problems of high recycling cost, high cost of metal coating, and difficulty in recycling valuable metals, and achieve effective utilization, low cost, economic and social benefits significant effect

Inactive Publication Date: 2007-02-14
丁四宜 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method is costly for treating waste plastic metal plating, and it is difficult to recover valuable metals (such as copper, nickel, chromium, etc.)

Method used

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  • Method for decoating on waste plastic metal

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Embodiment Construction

[0014] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0015] Put waste plastics mainly containing metal copper, nickel and chromium plating into the raw material hydrochloric acid solution, and fill in air at the same time to fully react the hydrochloric acid and the metal plating to generate a deplating solution containing copper chloride, nickel chloride and chromium chloride And the plastic after deplating; separate the deplating solution and deplating plastic produced, and recycle the deplating plastic into plastic particles after washing and drying; add sulfuric acid to the deplating solution after separation, sulfuric acid and deplating solution The metal chloride salt reacts to generate copper sulfate, nickel sulfate and hydrochloric acid, and the reacted mixed solution is cooled and crystallized to obtain copper sulfate and nickel sulfate crystals, and then separated by filtration to obtain copp...

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Abstract

The invention relates to a recycle method for waste metal. It includes the following steps: under plenty air situation, using hydrochloric acid to process waste plastic metal plate to make chlorination salt of copper, nickel and chrome, adding vitriol to make sulfate that would be easily crystallized to copper sulfate, nickel sulfate, etc, taking separation; the processed waste plastic would be made to plastic particle after washing. The solution in process would be circularly used. And there is no waste water to exhaust. The invention has the advantages of low cost, no pollution and high economic and social benefits.

Description

technical field [0001] The invention relates to a method for recycling waste metal, in particular to a deplating method for simultaneously recycling waste plastics and metal from waste plastics containing metal plating. Background technique [0002] At present, the recycling of waste plastics as a renewable resource has been paid more and more attention by people, but the recycling of some waste plastics containing metal coatings (mainly copper, nickel, chromium, etc.) is mainly corrosion method, that is, waste After the metal coating on the plastic surface is corroded, the remaining plastic is washed and made into plastic particles for reuse. Domestic treatment methods are mainly ferric chloride and hydrochloric acid hydrogen peroxide impregnation. Put the waste plastics containing the metal coating into the reaction tank of the above solution and soak for a period of time until the coating is completely corroded, then take it out and wash it with water to make plastic par...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/00
CPCY02P10/20
Inventor 王水平丁四宜
Owner 丁四宜
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