Supercharge Your Innovation With Domain-Expert AI Agents!

Waste circuit board recycling method

A technology for waste circuit boards and circuit boards, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., and can solve problems such as a large amount of iron sludge, difficulty in recycling catalysts, and no waste circuit boards , to achieve the effects of reduced metal content, good catalytic degradation performance, and good cycle stability

Active Publication Date: 2019-05-31
ZHENGZHOU UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although homogeneous advanced oxidation has been applied in industry, there are technical defects that are difficult to overcome: pre-acidification is required to adjust the pH of the water body, a large amount of iron sludge is produced, and the catalyst is difficult to recover, etc.
[0005] In the prior art, there is no related technical report on the recycling of waste circuit boards and the co-production of carbon-based catalysts for the treatment of organic wastewater

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The waste circuit board is carbonized after removing the surface components. The carbonization temperature is 800°C and the carbonization time is 100min. The stroke is 10mm, the stroke frequency is 420 times / min, and the flushing water is 0.5 liters / s. The sorted metal-rich components are recovered as products, and the sorted carbon-rich components are added to 0.1mol / L hydrochloric acid solution and stirred 300min, then add 0.1mol / L sodium borohydride solution and stir for 40min, filter and vacuum dry to obtain a carbon-based catalyst loaded with nanometer zero-valent copper.

[0047] The copper-carbon composite catalyst is applied to the catalytic degradation of rhodamine B dye. Add 0.1g / L copper-carbon catalyst to 5mg / L rhodamine B solution, stir for 100min, add 50mmol / L hydrogen peroxide, the temperature is 10℃, pH 3.5, stirring for 60min, the rhodamine B removal rate reached 92.5%, and the first 30min rhodamine B removal rate was 0.082min -1 (first-order reaction ...

Embodiment 2

[0051] The waste circuit board is carbonized after removing the surface components. The carbonization temperature is 500°C and the carbonization time is 600min. The carbonized circuit board is ground to less than 0.1mm, and then sorted on the shaking table. The stroke is 15mm, the stroke frequency is 300 times / min, and the flushing water is 0.1 liter / s. The sorted metal-rich components are recovered as products, and the sorted carbon-rich components are added to 1.5mol / L sulfuric acid solution, and stirred 30min, then add 1mol / L sodium borohydride solution and stir for 180min, filter and vacuum dry to obtain a carbon-based catalyst loaded with nanometer zero-valent copper.

[0052] Copper-carbon composite catalyst is applied to the catalytic degradation of methylene blue dye. Add 5g / L copper-carbon catalyst to 100mg / L methylene blue solution, stir for 90min, add 500mmol / L hydrogen peroxide, temperature is 60℃, pH is 8.5, stir for 300min , the removal rate of methylene blue rea...

Embodiment 3

[0055] The waste circuit board is carbonized after removing the surface components. The carbonization temperature is 600°C and the carbonization time is 240min. °, the stroke is 12mm, the stroke frequency is 360 times / min, and the flushing water is 0.2 liters / s. The sorted metal-rich components are recovered as products, and the sorted carbon-rich components are added to 1.0mol / L nitric acid solution , stirred for 100 min, then added 0.8 mol / L sodium borohydride solution and stirred for 120 min, filtered, and vacuum-dried to obtain a carbon-based catalyst loaded with nanometer zero-valent copper.

[0056] The copper-carbon composite catalyst is applied to the catalytic degradation of rhodamine B dye. Add 0.5g / L copper-carbon catalyst to 10mg / L rhodamine B solution, stir for 50min, add 120mmol / L hydrogen peroxide, the temperature is 50℃, the pH 7.0, stirring for 120min, the removal rate of Rhodamine B reached 98.7%, and the removal rate of Rhodamine B in the first 60min was 0.0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a waste circuit board recycling method, and belongs to the technical field of waste electronic and electrical appliance waste recycling. According to the waste circuit board recycling method, a catalyst is prepared through carbonization, shaking table separation and leaching reduction, the comprehensive utilization of waste circuit boards is realized, the prepared catalystis used for efficient and heterogeneous catalytic degradation of organic pollutants in wastewater, and a green technical path of treating waste by the waste is realized. The waste circuit board recycling method provides a waste circuit board resource utilization technology, the technology is low in cost, simple in technique, high in the comprehensive utilization rate, high in the catalytic activity of the catalyst, and friendly to the environment, and provides the technical support for recycling of the waste circuit boards.

Description

technical field [0001] The invention relates to a method for recycling waste circuit boards, belonging to the technical field of recycling waste electronic and electrical appliances. Background technique [0002] With the rapid development of electronic technology, a large amount of electronic and electrical waste is generated every year. Waste circuit boards are an important part of electronic and electrical waste, accounting for about 3% of the total electronic and electrical waste. [0003] Waste circuit boards are mainly disposed of through incineration and landfill, which has caused serious environmental pollution and waste of resources. With the increasing pressure on environmental protection and resources, green and efficient recycling technologies have received extensive research and attention. Recycling technologies for waste circuit boards mainly include pyrometallurgy, hydrometallurgy, biometallurgy, physical separation, and chemical recycling. More research wo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B7/00C22B15/00C02F1/72C02F101/30
CPCY02P10/20
Inventor 王重庆曹亦俊
Owner ZHENGZHOU UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com