印制电路板酸性蚀刻废液的膜电解再生  

Membrane electrolytic regeneration of spent acidic etchant for printed circuit board

作　　者：蒋玉思[1] 黄奇书[1] 张建华[1] 程华月[1] 顾珩[1] 

机构地区：[1]广州有色金属研究院稀有金属研究所,广东广州510651

出　　处：《环境污染与防治》2011年第8期53-56,共4页Environmental Pollution & Control

基　　金：广东省科技计划项目(No.2007B080203003)

摘　　要：高度精细化线路和高层数印制电路板产量的增加,导致酸性蚀刻废液的排放量越来越大,对环境的负荷也随之增大。介绍了酸性蚀刻废液膜电解再生的基本原理,进行了中试规模的应用研究,并与其他电解再生方法进行技术与经济比较分析。结果表明,在槽电压为5V、电解时间为2h的条件下,酸性蚀刻废液的氧化还原电位由480mV升至540mV,所得铜粉的纯度大于99%。电解再生能耗约为627kW.h/t(以废液计),盐酸消耗量为30L/t(以废液计)。膜电解方法再生酸性蚀刻废液是可行的,预计将具有广阔的发展前景。The discharge of spent acidic etchant is getting greater than before because of the increase in out put of printed circuit boards with fine lines and many layers.This paper briefly introduced the principle of membrane electrolytic regeneration for the spent acidic etchant,and the pilot experiment was carried out.Base on experiment results,the economic and technical comparison of different regeneration methods was analyzed.The results showed that when the cell voltage was 5 V and electrolyzing time was 2 h,the oxidation and reduction potential of acidic etchant rose from 480 mV to 540 mV,the purity of obtained copper powder was higher than 99%.The energy consumption of spent etchant regeneration was about 627 kW·h/t,and replenish quantity of hydrochloride was 30 L per ton spent etchant.The membrane electrolysis of spent acidic etchant is reasonable,so it is expected that membrane electrolysis has broad developing prospects.

关 键 词：印制电路板 酸性蚀刻废液 膜电解 再生 铜粉 

分 类 号：TN41[电子电信—微电子学与固体电子学] X76[环境科学与工程—环境工程]