Preparation of Cu2O Powder in NaOH solution Using CuCl Obtained from Spent Printed Circuit Boards Etchant

Sang-hun Lee; Kyoungkeun Yoo; Jae-chun Lee

doi:10.32390/ksmer.2018.55.3.194

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2018 Vol.55, Issue 3 Preview Page Next Page

Research Paper

Preparation of Cu₂O Powder in NaOH solution Using CuCl Obtained from Spent Printed Circuit Boards Etchant 인쇄회로기판 폐에칭액으로부터 회수된 염화구리를 이용한 수산화나트륨 용액에서의 산화제1동 분말 제조

29 June 2018. pp. 194-199

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Abstract

A recycling process was proposed to recover Cu component from spent etchant, which had been generated from printed circuit board manufacture. The recycling process consists of two steps. Firstly, Cu component was selectively precipitated as CuCl powder by adding Cu powder into the etchant. Secondly, cuprous oxide was synthesized using NaOH solution and the CuCl powder. In the present study, the effect of pH on Cu₂O synthesis was investigated under the conditions at pH 3.7-12.1 by adjusting NaOH concentration. The peaks of cuprous oxide were observed in XRD result of powder synthesized at pH 4.8, which was closed to the equilibrium pH calculated thermodynamically under the same conditions with the experiment.

Keywords

cuprous oxide

spent etchant

cuprous chloride

NaOH solution

인쇄회로기판 제조공정에서 발생한 폐에칭액으로부터 구리성분을 회수하기 위해 두 단계로 구성된 재활용 공정이 제안되었다. 우선 폐에칭액에 구리분말을 투입하여 선택적으로 구리성분을 염화구리로 침전시킬 수 있었다. 회수된 염화구리 분말을 수산화나트륨 용액에 반응시켜 산화제1동 분말을 제조하였다. 본 연구에서 산화제1동 분말 형성에 대한 pH의 영향을 수산화나트륨 농도를 조절하여 pH 3.7-12.1 범위에서 관찰하였다. pH 4.8에서 형성된 분말을 XRD로 조사했을 때 산화제1동의 피크가 관찰되었으며, 이는 동일한 조건에서 열역학적으로 계산된 평형 pH에 근접한 것을 확인할 수 있었다.

키워드

산화제1동

폐에칭액

염화구리

수산화나트륨 수용액

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 55
No :3
Pages :194-199
Received Date : 2018-05-03
Revised Date : 2018-05-28
Accepted Date : 2018-06-22
DOI :https://doi.org/10.32390/ksmer.2018.55.3.194

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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