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Production of high purity Copper Oxide nanoparticles from depopulated Printed Circuit Boards (e-waste) using novel Cu-selective ligand grafted polymeric resins & Synthesis of novel copper selective polymeric resins


  • Promotional TT fee to celebrate Azadi ka Amrit Mahotsav (75th anniversary of Independence) is applicable for Technologies w.e.f 2nd October 2021 to 30th September 2023**
Technology for production of copper oxide nanoparticles from e-waste PCBs

1 Technology for production of copper oxide nanoparticles from e-waste PCBs

The proposed technology involves production of high purity copper oxide nanoparticles (CuO NPs) from electronic waste via hydrometallurgical route using novel polymeric resin developed at Hydrometallurgy Section, MP&CED, BARC. The process begins with generation of acidic leach liquor of copper from printed circuit boards (PCBs), followed by feed acidity adjustment for removal of tin and selective uptake of copper using novel copper selective resin. After scrubbing under optimized conditions, high purity copper is obtained by elution with mild acid in continuous column mode. Copper is then precipitated and calcined at high temperature (~400 oC) to yield high purity CuO nanoparticles. Further, using same resin, lead is recovered from the raffinate of leach liquor and subsequently converted into commercially valuable lead sulfide. The process therefore offers fully scalable technology for production of CuO nano particles, SnO and PbS from e-waste. This process promises abundant profit and employment opportunity to the electronic waste recycling industry, and offers long term solution to electronic waste management. The technology for synthesis of Cu-selective resin is also included.
Technology for production of copper oxide nanoparticles from e-waste PCBs

1 Technology for production of copper oxide nanoparticles from e-waste PCBs

Brief Description
The proposed technology involves production of high purity copper oxide nanoparticles (CuO NPs) from electronic waste via hydrometallurgical route using novel polymeric resin developed at Hydrometallurgy Section, MP&CED, BARC. The process begins with generation of acidic leach liquor of copper from printed circuit boards (PCBs), followed by feed acidity adjustment for removal of tin and selective uptake of copper using novel copper selective resin. After scrubbing under optimized conditions, high purity copper is obtained by elution with mild acid in continuous column mode. Copper is then precipitated and calcined at high temperature (~400oC) to yield high purity CuO nanoparticles. Further, using same resin, lead is recovered from the raffinate of leach liquor and subsequently converted into commercially valuable lead sulfide. The process therefore offers fully scalable technology for production of CuO nano particles, SnO and PbS from e-waste. This process promises abundant profit and employment opportunity to the electronic waste recycling industry, and offers long term solution to electronic waste management. The technology for synthesis of Cu-selective resin is also included.

Salient Feature

A process for production of copper oxide nano particles

(purity >99.9%) from printed circuit boards (PCBs)/powder

concentrate, using indigeneously developed polymeric resin.

Such a process is developed for the first time wherein,

one of the potentially hazardous waste (e-waste) is processed

to produce highly techno-commercial and anti-viral product

(copper oxide nano particles). 



Advantages

This technology empowers metal recyclers to start production of high purity copper oxide nanoparticles whose current market rate is about Rs 18,000/- per kg. This process also ensures toxic ‘lead’ free effluent discharge from PCBs processing. For an e-waste rich country like India, if this technology is adopted at various levels, our dependence on primary copper production may also come down. 



Areas of Application

Electronics Manufacturing, sensors and solar cells, anti-microbial and anti-fouling coatings, electrochemical energy storage, heterogeneous catalysis and rocket propulsion. 

Technology for production of copper oxide nanoparticles from e-waste PCBs

1 Technology for production of copper oxide nanoparticles from e-waste PCBs

Brief Description
The proposed technology involves production of high purity copper oxide nanoparticles (CuO NPs) from electronic waste via hydrometallurgical route using novel polymeric resin developed at Hydrometallurgy Section, MP&CED, BARC. The process begins with generation of acidic leach liquor of copper from printed circuit boards (PCBs), followed by feed acidity adjustment for removal of tin and selective uptake of copper using novel copper selective resin. After scrubbing under optimized conditions, high purity copper is obtained by elution with mild acid in continuous column mode. Copper is then precipitated and calcined at high temperature (~400oC) to yield high purity CuO nanoparticles. Further, using same resin, lead is recovered from the raffinate of leach liquor and subsequently converted into commercially valuable lead sulfide. The process therefore offers fully scalable technology for production of CuO nano particles, SnO and PbS from e-waste. This process promises abundant profit and employment opportunity to the electronic waste recycling industry, and offers long term solution to electronic waste management. The technology for synthesis of Cu-selective resin is also included.

Process
In India, according to ASSOCHAM (Associated Chambers of Commerce 
and Industry of India) the compound annual growth rate of e-waste 
is 30%, with estimated annual generation of 5.2 million tonnes of 
e-waste by 2020. On one hand this is a serious environmental 
concern due to heavy metal toxicity, on the other hand it is a 
promising urban mine and can become a national resource of
valuable metals. In recent years recycling of e-waste is 
considered for recovery of valuable as well as hazardous metals, 
one of the major components being Printed Circuit Boards (PCBs) 
from spent electronic accessories, which contains about 10-20% 
copper by mass. Although base metal copper and copper oxide (CuO) 
has low commercial value, CuO nanoparticles have immense 
commercial value and unique applications. 
The process developed is for specifically enabling environmentally 
concerned metal recyclers to achieve scaled-up production of high 
purity copper oxide nanoparticles in continuous mode operation 
from waste PCBs. The major steps are leaching, selective metal 
sorption/desorption by functionalized polymeric resins, 
precipitation and filtration of the product for final drying, 
production of CuO nanoparticles, PbS, SnO and packaging. 
All the unit operations are easily scalable and the necessary 
process equipments are commercially available and
are not capital intensive. Technology for synthesis of Cu-selective
resin is also given along with the process.
This technology thus provides the 
advantage of commercially producing very high purity metal 
compounds right from e-scrap, thus providing considerable 
financial gains at the same time mitigating the environmental 
concerns of ever increasing e-waste, transforming 
it into a valuable resource for making the country 
technologically self-reliant. 


Advantages

This technology empowers metal recyclers to start production of high purity copper oxide nanoparticles whose current market rate is about Rs 18,000/- per kg. This process also ensures toxic ‘lead’ free effluent discharge from PCBs processing. For an e-waste rich country like India, if this technology is adopted at various levels, our dependence on primary copper production may also come down. 



Areas of Application

Electronics Manufacturing, sensors and solar cells, anti-microbial and anti-fouling coatings, electrochemical energy storage, heterogeneous catalysis and rocket propulsion. 



Salient Feature

A process for production of copper oxide nano particles

(purity >99.9%) from printed circuit boards (PCBs)/powder

concentrate, using indigeneously developed polymeric resin.

Such a process is developed for the first time wherein,

one of the potentially hazardous waste (e-waste) is processed

to produce highly techno-commercial and anti-viral product

(copper oxide nano particles). 



Facilities Required
1) Depopulating unit: 
For making bare PCB boards free of other components
2) Delamination unit: 
Removal of polymer layer over PCB board for effective leaching
3) Leaching unit:
Leach reactor with agitator, electricity and water supply, Nutsche filter 
for separation of leach liquor and storage leach liquor, 
HCl handling and storage and feed preparation tank 
4) Metal sorption/desorption unit: 
Novel Cu-selective resins, Cylindical Acrylic columns for holding 
polymeric resins, pumps with flow control, suitable piping, 
electricity and water supply, eluent preparation and storage tank

5) Precipitation unit:
Reactor with agitator for precipitation of copper compound 
from loaded eluent and filtration using Nutsche filter 
6) Heating Furnace: Product drying, conversion to oxide
7) Packaging unit: For packing products CuO NPs, PbS 
and SnO powders

8) Analytical facility: For continuous analysis of Cu, impurities like
Pb and Sn, pH etc.

9) Demineralization/decontamination unit: Ion-exchange unit
for recycling/disposal of process water after removal of ions.

10) Ventilation system: For handling HCl fumes generated
during leaching
11) Electrical Supply: Required for running of various
 process equipment
12) Chemical Storage Unit: Stocking of raw materials 
needed for different unit operations
13) Facility for synthesis of Cu-selective resin


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  • Promotional TT fee to celebrate Azadi ka Amrit Mahotsav (75th anniversary of Independence) is applicable for Technologies w.e.f 2nd October 2021 to 30th September 2023**
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    General License Fee : ₹ 77,500.00 (Seventy Seven Thousand Five Hundred)

    General Royalty : 0%

    ** Subject to receipt of acceptance of our Terms & Conditions on or before 30th September 2023