Method for recovering waste plastic and etching waste liquid

A technology for etching waste liquid and waste plastic, applied in chemical instruments and methods, plastic recycling, surface etching compositions, etc., can solve problems such as waste products, large quantities, etc., and achieve the effect of increased removability and improved affinity

Inactive Publication Date: 2010-05-12
ASTECIRIE CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These plastic products sometimes produce a large number of defective products in the production process, and sometimes produce waste products after further processing
In addition, many plastic products are disposed of after use

Method used

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  • Method for recovering waste plastic and etching waste liquid
  • Method for recovering waste plastic and etching waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Next, examples performed to confirm the effects of the present invention will be described.

[0056] Here, a product in which copper and nickel metal plating layers were sequentially formed on the surface of a target base material made of ABS resin, which is waste plastic, was recycled. It should be noted that the metal plating layer of copper and nickel is formed on the surface of the target base material by electroless plating and electroplating.

[0057] First, 100 kg of waste plastics on which metal plating was formed (that is, metal plating construction objects) were immersed in a ferric chloride solution to dissolve the metal plating in the ferric chloride solution. This test was performed 8 times in total. In addition, the ferric chloride concentration of the ferric chloride solution used was 37.3 mass % (8 times average), and the immersion time in the ferric chloride solution was 2 cases of 10 hours and 15 hours.

[0058] Next, the target substrate is taken ou...

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PUM

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Abstract

The invention provides a method for using the waste plastics formed with metal coating as resource and additionally recovering metal waste plastics in an etching waste liquid and the etching waste liquid. The method comprises: step A, dipping the waste plastics formed with a metal coating containing one or more than two elements from chromium, copper and nickel on the surface into an etching waste liquid containing ferric chloride and removing the metal coating from the waste plastics; step B, washing the waste plastics without the metal coating, and recovering the waste plastics; step C, doing chemical reaction of the etching waste liquid containing the metal coating component and respectively recovering the metal components apart from iron; and step D, oxidizing the etching waste liquid without the metal component and manufacturing new etching liquid.

Description

technical field [0001] The present invention relates to the use of etching waste liquid to remove the metal plating of waste plastics that have been coated with any one or two or more of copper, nickel, and chromium on the surface, and further regenerate the components of the etching waste liquid and the metal plating The recycling method of waste plastics and etching waste liquid. Background technique [0002] Conventionally, among plastic products, a large number of products plated with copper, nickel, chromium, etc. have been put on the market. These plastic products sometimes produce a large amount of defective products in the production process, and sometimes produce waste products after further processing. In addition, many plastic products are disposed of after use. Conventionally, these are discarded by incineration treatment or landfill treatment as they are, for example, a method of thermal decomposition as described in Patent Document 1 is often performed. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/06C22B7/00C23F1/46C09K13/00
CPCY02P10/20Y02W30/62
Inventor 小森裕司高桥宏幸秦吉范西泰行日下部信夫井上英二钟个江繁光吉野宽桥口正一
Owner ASTECIRIE CORP LTD
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