IN362487: Process for the recovery of copper, iron, tin and lead from used printed circuit boards using organic acids

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The invention provides a process for the recovery of Cu, Fe, Sn and Pb from Printed Circuit Boards (PCB) available in E- Waste. Organic acids were used for the recovery of copper, iron, sin and lead. Formic acid is used for the recovery of tin and load & solder materials while acetic acid with hydrogen peroxide is used for the recovery of iron and copper. The copper is recovered as; CU(CH3COO)2 with 99% purity. The iron is recovered as Fe(CH3C00)3 with 85% purity. The Sn is recovered as Sn(HCOO)2 with; 99% purity. The Pb is recovered as PbSO4 with 80% purity.

Patent No:: IN362487
Application No:: 1671DEL2015
Filing Date:: 05-06-2015
Issue Date:: 22-03-2021
Applicant:: CSIR-Central Salt Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar
Inventor(s):: Hari Chand Bajaj; Noor-Ul Hasan Khan; Arvinkumar Balvantrai Boricha; Krishnan Muthukumar; Subramanian Natarajan
Country:: India

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