化学沉淀法再生硝酸型退锡废液研究
Guangdong Chemical Industry（2016）
Abstract
采用化学沉淀法,以乙二酸沉淀剂,对硝酸型退锡废液再生进行研究.实验结果表明,适宜的沉淀条件为:在搅拌下将乙二酸按每100 mL废液8 g的比例投加,沉淀5h.沉淀后上清液补充一定量的硝酸、盐酸及苯并三氮唑后其退锡速度和退锡容量等与新退锡液无异,该工艺可使PCB企业的硝酸型退锡废液实现循环使用.
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