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Method for recovering acrylonitrile butadiene styrene (ABS) plastic galvanized parts

A technology of styrene plastics and recycling methods, which is applied in the direction of plastic recycling, recycling technology, process efficiency improvement, etc., can solve the problems of low purity, low recovery rate, plastic damage, etc., and achieve simple process, convenient use, The effect of reducing loss

Inactive Publication Date: 2012-07-04
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the technical problems of the prior art that the treatment of ABS plastic electroplating parts is easy to damage the plastic, and the recovery rate of copper and nickel metal is not high and the purity is low

Method used

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  • Method for recovering acrylonitrile butadiene styrene (ABS) plastic galvanized parts
  • Method for recovering acrylonitrile butadiene styrene (ABS) plastic galvanized parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the following steps, the recycling method of ABS plastic electroplating parts is realized, and the process is as follows.

[0023] (1) Put the ABS plastic electroplating parts into the cleaning tank for cleaning, and then crush them to less than 1.0cm with a pulverizer.

[0024] (2) Put the pieces of electroplated parts into the deplating solution containing hydrochloric acid with a mass concentration of 10% and hydrogen peroxide with a mass concentration of 5% at a ratio of liquid to solid of 2:1, and deplate at a temperature of 10°C for 14 hours .

[0025] (3) Rinse the stripped ABS plastic fragments with water in a cleaning tank, crush them again and granulate them to obtain ABS plastic particles, and return the rinsed liquid to step (2).

[0026] (4) The solution after deplating in step (2) flows through the metal sponge and activated carbon successively, and the reduced and precipitated chromium powder is adsorbed on the activated carbon, and the chro...

Embodiment 2

[0031] According to the following steps, the recycling method of ABS plastic electroplating parts is realized, and the process is as follows.

[0032] (1) Put the ABS plastic electroplating parts into the cleaning tank for cleaning, and then crush them to less than 2.0cm with a pulverizer.

[0033] (2) Put the pieces of electroplated parts into the deplating solution containing hydrochloric acid with a mass concentration of 5% and hydrogen peroxide with a mass concentration of 3% according to the ratio of liquid to solid ratio of 3:1, and deplate at 25°C for 4 hours .

[0034] (3) Rinse the stripped ABS plastic fragments with water in a cleaning tank, crush them again and granulate them to obtain ABS plastic particles, and return the rinsed liquid to step (2).

[0035] (4) The solution after deplating in step (2) flows through the metal sponge and activated carbon successively, and the reduced and precipitated chromium powder is adsorbed on the activated carbon, and the chrom...

Embodiment 3

[0040] According to the following steps, the recycling method of ABS plastic electroplating parts is realized, and the process is as follows.

[0041] (1) Put the ABS plastic electroplating parts into the cleaning tank for cleaning, and then crush them to less than 1.0cm with a pulverizer.

[0042] (2) Put the pieces of electroplated parts into the deplating solution containing hydrochloric acid with a mass concentration of 15% and hydrogen peroxide with a mass concentration of 1% at a ratio of liquid to solid of 5:1, and deplate at 40°C for 24 hours .

[0043] (3) Rinse the stripped ABS plastic fragments with water in a cleaning tank, crush them again and granulate them to obtain ABS plastic particles, and return the rinsed liquid to step (2).

[0044] (4) The solution after deplating in step (2) flows through the metal sponge and activated carbon successively, and the reduced and precipitated chromium powder is adsorbed on the activated carbon, and the chromium content in t...

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Abstract

A method for recovering acrylonitrile butadiene styrene (ABS) plastic galvanized parts belongs to the field of solid waste recovery. The method comprises the steps of crushing, deplating, ABS plastic recovery, chromium reduction, electrolytic reduction of copper, and evaporation and concentration for preparing nickelous chloride. According to the method, the dynamic closed cycle of all working solution is realized, the primary recovery of ABS plastic is achieved, the recovery rate is above 99 percent, both the electrolytic copper and the nickelous chloride reach the national primary standards, the recovery rate of copper is above 97 percent, and the recovery rate of nickelous chloride is above 98 percent. The method is simple to operate, low in energy consumption and environmental-friendly.

Description

technical field [0001] The invention belongs to the field of solid waste recovery. The invention relates to a method for recovering ABS plastics, copper and nickel metals from acrylonitrile-butadiene-styrene (ABS) plastic electroplating parts. Background technique [0002] With the continuous improvement of modern living standards, especially the rapid development of industries such as home appliances and automobiles, metal and plastic composite materials are widely used due to their excellent properties. The annual consumption of acrylonitrile-butadiene-styrene (ABS) plastic electroplating parts in my country is about 100,000 tons or more. These waste electroplating parts are large in size and occupy land, which not only aggravates environmental pollution, but also causes waste of resources. [0003] At present, my country mainly uses chemical deplating methods to deal with ABS plastic electroplating parts, that is, after the waste electroplating plastics are crushed with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/10C22B3/20B29B17/02C22B15/00C22B23/00C22B34/32
CPCY02P10/20Y02W30/62
Inventor 邱祖民郑楠刘钟薇刘杰
Owner NANCHANG UNIV
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