Development of Simple Treatment Process of Etching Waste Liquor of Print Circuit Board Using Pseudo Liquid Membranes

伪液膜印刷电路板蚀刻废液简易处理工艺的研制

• 批准号: 11555207
• 负责人: TANIGAKI Masataka
• 金额: $ 2.24万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555207/
• 关键词: Waste Etching Liquor; Treatment Process; Electro-Static Pseudo Liquid Membrane; Bulk Liquid Membrane; Dispersion Behavior of Droplets; Mass Transfer; 擬液膜; 分離操作; 廃液処理; 静電液膜; 抽出分離; 酸廃液処理; 液滴分裂; 銅イオン; リサイクル

This work was carried out with the aim of developing a simple treatment method of recovering copper metal and enabling the recycle use of acid from the etching waste liquor of print circuit board.In the first year (Report 1), (1)the systematic selection of extractant which can extract copper from the high concentration waste liquor of acid, (2)experimental work of Electric Pseudo Liquid Membrane (ESPLIM) and (3)Bulk Liquid Membrane (BLM) was carried out. The partial recovery of copper and the recycle use of acid were found possible. However, the multi stage operation was necessary for ESPLIM. In the case of BLM, the improvement of the mass transfer rate was necessary.In the second year (report 2), experimental work with mainly (3)Bulk Liquid Membrane (BLM) was continued with a newly-developed extractant. Forced circulation of the organic phase was introduced to promote the exchange of the oil drops in the stirred tank and the above bulk organic layer. This enabled the rapid exchange of the organic phases and the effective mass transfer rate. However, (4)the feasibility study of the etching waste liquor revealed that the extraction of a large amount of acid together with copper is a serious problem. New extractant which extract metal only is required.Because of the unfortunate results so far, (5)behavior of droplets in the electric field and the estimation of mass transfer rate was chosen as a new aim of the present work. The model which successfully explains the observed dispersion and the movement of the droplets made it possible to estimate the overall-extraction ability of ESPLIM operation.

本研究的目的是开发一种从印刷电路板蚀刻废液中回收金属铜的简单处理方法，并使酸能够循环使用。（1）系统地筛选了从高浓度酸废液中萃取铜的萃取剂，（2）电准液膜（ESPLIM）和本体液膜（BLM）的实验研究。铜的部分回收和酸的循环使用是可能的。但ESPLIM需要分期手术。在第二年（报告2）中，继续进行了以（3）本体液膜（BLM）为主体的实验工作，使用了新开发的萃取剂。引入有机相的强制循环以促进搅拌槽中的油滴与上述本体有机层的交换。这使得有机相的快速交换和有效的传质速率成为可能。然而，（4）蚀刻废液的可行性研究表明，大量酸与铜一起提取是一个严重的问题。（5）液滴在电场中的行为和传质速率的估算是本论文的一个新目标。该模型成功地解释了所观察到的分散和液滴的运动，使得有可能估计的总体提取能力的ESPLIM操作。