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   Technology and Product Development

    Basic Information

Technology developed: Integrated pyrosonication process for recovery of metals and energy from electronic waste. (TP19762297159)
Category: Technology Service/Know how
Details of Inventor(s):
Inventor Institution/Organization/Company Department Designation
KAMAL KISHORE PANT Indian Institute of Technology, Delhi Chemical Engineering Professor
Technical Application Area: Chemicals & Materials Science
If 'Other', please specify:
Please give more details of new technical application area:
Indian Institute of Technology (IIT) Delhi
Affiliated Ministry: Institution Funding (Self Supported)
Type of technology development: Indigenous
Does the technology help in replacing any import items currently
procured from outside India?
Does the technology have export potential? Yes
Category of Technology developed: Immediate Deployment
Stage of Development: Lab-scale
Please describe in detail including the TRL Level:


Applications: An integrated process of pyrolysis and sonication (pyrosonication) has been developed which efficiently recycles the plastic component of the waste electrical and electronic equipment material and recovers metal from it without using any chemicals or employing high temperature to perform the process. This process comprises pyrolysis of the electronic waste material to obtain gaseous or liquid fuel and solid residue and sonication of the solid residue to obtain metal fraction. The e- waste material for the process is selected from computers, mobile, calculator, television etc. including their printed circuit board. The waste material is crushed into the particle of size 1 mm to 18 mm before conducting pyrolysis. The pyrolysis of the waste material is conducted at a temperature ranging from 200°C to 600°C for a time period ranging from 10 minutes to 60 minutes. The solid residue obtained from the pyrolysis is a mixture of metal and char. The solid residue is then sonicated. The sonication of solid residue comprises preparing a mixture of solid residue and water in a container and then sonicating the mixture to obtain metal fraction agglomerated at the bottom of the container and char dispersed in water. The dispersed char in water is recovered by filtration and the water can be reused again for further sonication. The metal fraction agglomerated at the bottom is collected and washed to obtain metal fraction free from char. The recovery of metal fraction using the integrated process of pyrolysis and sonication according to the present invention was measure above 90 percent with Cu, Fe, Pb, Al, and Ni as major metal components. This technology also provides the application of pyrosonication for energy production
Advantages: The gases generated formed during the pyrolysis process contains H2, CH4, CO, and CO2. The gaseous stream can be used for the generation of energy in the form of heat. The yield of metal fraction obtained by the process is in between 90 to 95 percent. This method is not using any chemical or employing high temperature to perform the process. This process helps in reducing the mining cost. This technology will enable industries to meet their energy demands in house via utilization of produced combustible gases and crude oil.

    Technology Inputs:

Imported Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Indigenous Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Imported Raw Materials:
Raw Materials Year ITC-HS Code
Indigenous Raw Materials:
Raw Materials Year ITC-HS Code
Existing R&D Facilities used:
Facilities Year ITC-HS Code

    R&D Investment:

R&D investment (Rs. in Lakhs):                    
Indian Source (Rs.) Foreign Source (Rs.) Year
0 0 NA

   Patents & Publications:

Filed Patents (No.) Granted Patents (No.) Year
0 0 NA
Submitted (No.) Published (No.) Year
0 0 NA

    Commercialization Potential:

Who are the Potential Licensees?
What commercially available products address
the same problem?
Company Product Problem Addressed
Would you like to develop this invention further with
corporate research support?
Would you be interested in participating in cluster based
programs for commercialization research or business
planning for your invention?
      Submitted by: Anil Wali Date of Submission: 5-8-2020

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