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1. (WO2017037625) A METHOD AND PROCESS OF RECOVERING METAL VALUES FROM WASTE MONOLITHIC CERAMIC CAPACITORS

Pub. No.:    WO/2017/037625    International Application No.:    PCT/IB2016/055189
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Sep 01 01:59:59 CEST 2016
IPC: C22B 7/00
C22B 3/00
C22B 15/00
C22B 25/06
C22B 26/20
C22B 34/12
Applicants: ATTERO RECYCLING PVT. LTD.
Inventors: GUPTA, Nitin
PRABAHARAN, G.
BARIK, Smruti Prakash
KUMAR, Bhuvnesh
PRASAD, Jageshwar
Title: A METHOD AND PROCESS OF RECOVERING METAL VALUES FROM WASTE MONOLITHIC CERAMIC CAPACITORS
Abstract:
The present invention relates to the recycling process of electronic waste resources to recover metals of value. More particularly, it relates to eco-friendly yet efficient hydrometallurgical processes to recover metal values from waste monolithic ceramic capacitors. In the proposed method, the source material such as mother boards having MLCC is pulverized using a ball mill to dislodge various components such as monolithic ceramic capacitors (MLCC) to form a powdery mixture of components. The mixture of components is then sieved. The MLCC powder of particular size range is then subjected to hydrometallurgical process. The process then transfers the precious metals into solution by leaching process followed by selective precipitation, purification, cementation and final recovery of metals.