J Mater Sci Technol ›› 2008, Vol. 24 ›› Issue (01): 141-142.

• Research Articles • Previous Articles     Next Articles

Preparation of Pure Copper Powder from Acidic Copper Chloride Waste Etchant

H.S.Hong, M.S.Kong, J.K.Ghu, J.K.Lee, H.G.Suk   

  1. Plant Engineering Center, Institute for Advanced Engineering, Yongin, 449-863, Korea
  • Received:2007-09-03 Revised:1900-01-01 Online:2008-01-28 Published:2009-10-10
  • Contact: H.S.Hong

Abstract: The method for the recycling of copper from copper chloride solution was developed. This process consists of extraction of copper, purification and particle size reduction. In the first step, reductive metal scraps were added to acidic copper chloride waste enchants produced in the PCB industry to obtain copper powder. Composition analysis showed that this powder contained impurities such as Fe, Ni, and water. So, drying and purification were carried out by using microwave and a centrifugal separator. Thereby the copper powder had a purity of higher than 99% and spherical form in morphology. The copper powder size was decreased by ball milling.

Key words: Copper chloride liquid waste, Printed circuit board (PCB), Liquid waste, High purity copper powder