Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic

A technology of electroplating plastics, separation and recycling, which is applied in the direction of plastic recycling, recycling technology, process efficiency improvement, etc., and can solve problems that affect the strength, appearance and bonding performance of recycled plastics, waste of metal resources, and reduce the value of recycling. , to achieve the effect of easy industrial production, high income and low investment

Active Publication Date: 2009-07-08
GUANGDONG BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, ordinary plastics can be directly recycled after being heated and melted, extruded and granulated. If waste electroplated plastics are treated in the same way, the residual metal will affect the strength, appearance and bonding performance of recycled plastics, greatly reducing its recycling value
Thirdly, the most common electroplated metal layers o

Method used

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  • Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic
  • Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic
  • Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The ABS electroplating plastic used in this test was analyzed, and the composition is as follows:

[0026]

[0027] Take 1Kg of the above-mentioned electroplated plastics and process them into fragments with a particle size of less than 5mm with a crusher, put them into 1.5 liters of 4mol / L nitric acid solution, control the reaction temperature to 60°C, and the reaction time to 4h. 2.0L, each metal content in the solution is measured as follows:

[0028]

[0029] After calculation, the leaching rate of nickel is 98.35%, the leaching rate of copper is 99.05%, and the leaching rate of chromium is only 1.1%.

Embodiment 2

[0031] Take 1 L of the leaching solution in Example 1, adjust the pH value of the solution to 3.5, calculate according to the copper ion content in the solution, add 18.89 g of iron powder (1.05 times the theoretical amount), the reaction temperature is 75 ° C, mechanically stirred, and the reaction time is 3 h . After the reaction is finished, filter and wash, the solution is settled to the original volume, and the content of each metal is analyzed as follows:

[0032]

[0033] After calculation, the replacement rate of copper is 98.97%. After drying the filter residue and separating iron by magnetic separation, 21.01 g of sponge copper was obtained, and its copper content was analyzed to be 99.85%.

Embodiment 3

[0035] Take 1.0L of the solution in Example 2, put it in a 3L beaker, add 13.43g of sodium sulfate, adjust the pH value of the solution system to 2.5, control the water melting temperature to 95°C, and the mechanical stirring rate to 500r / min. After continuing the reaction for 2.5h, Filter, after filtering out the yellow jarosite precipitation, the filtrate is settled to the original volume, and the analysis of the filtrate components is as follows:

[0036]

[0037] After calculation, the removal rate of iron ions is 97.05%.

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PUM

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Abstract

The invention discloses method of isolating and recovering cuprum and nickel from the waste plating plastics and regenerating plastics.The method is characterized in that metals of cuprum, nickel and the like on the surface of waste plating plastics after being pulverized by a pulverizer are dissolved by hydrogen nitrate, undissolved substances are filtered and washed, then pure plastics can be obtained for regeneration; the solution containing cuprum and nickel is displaced by powdered iron to obtain a high purity spongy copper; the rest liquid is performed with iron removal by using a amarillite method, a pure nickel nitrate solution can be obtained after foreign ions of copper, iron and the like are removed by P204 extraction, metallic nickel plates can be produced by an electrodeposition process.The invention has characteristics of simple technique, cheap original supplementary materials and high added value of products.

Description

technical field [0001] The invention belongs to the technical field of resource regeneration, and more specifically relates to a method for separating and recovering copper, nickel and recycled plastics from waste electroplating plastics. Background technique [0002] Plastic is widely used because of its strong plasticity, fine surface and low price. Among them, plastic products are endowed with metal properties after being electroplated with a metal layer. They have the characteristics of light weight, electrical conductivity, better gloss than ordinary plastics, and good leveling. They combine the advantages of plastics and metals and can replace some metals such as copper. , aluminum, stainless steel, etc. At present, it has been widely used in industries such as electronics, automobiles, motorcycles, hardware, and household goods. [0003] However, ordinary plastics can be directly recycled after being heated and melted, extruded and granulated. If waste electroplated...

Claims

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Application Information

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IPC IPC(8): C22B7/00B29B17/02C23F1/16C22B3/06C22B3/20C25C1/08C25C1/12
CPCY02P10/20Y02W30/62
Inventor 李长东黄国勇徐盛明
Owner GUANGDONG BRUNP RECYCLING TECH
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