正交法优选废弃全氟磺酸离子膜化学再生工艺研究  

Orthogonal optimization of chemical regeneration process for waste perfluo-sulfonate ion membrane

作　　者：顾卫荣 牟豪杰 张树峰 

机构地区：[1]亿利资源集团有限公司,北京100031

出　　处：《现代化工》2012年第7期77-80,共4页Modern Chemical Industry

摘　　要：采用L16(45)正交法研究了酸的浓度等五个因素对废弃全氟磺酸离子膜化学再生效果的影响。实验表明,盐酸浓度为15%～20%,水浴温度为60℃,浸泡时间为12～24 h,超声时间为1～2 h,EDTA浓度为0.2 mol/L条件下,离子膜中杂质元素被基本除去,离子膜离子交换容量(IEC)可恢复到新膜的80%～90%。电子显微镜扫描结果显示,离子膜羧酸层孔洞较多,直接回用会因OH-反渗降低电流效率,需要加以修复才能利用。With L16 （4^5） orthogonal method, the effects of concentration of acid and other five factors on the chemical regeneration process for waste perfluo-sulfonate ion membrane are studied. The optimal operation parameters are shown as follows：15% -20% of concentration of hydrochloric acid,60℃ of water temperature, 12- 24 hours of soaking time, 1 - 2 hours ultrasound and O. 2 mol/L of concentration of EDTA. Under the optimized condition, the impurities elements in the ion membrane are almost completely removed. The ion membrane capacity （IEC） of the regenerated ion membrane can reach up to 80% -85% of the new one. The SEM results show that,there are many holes detected on the membrane. It requires to be regenerated for further application. The perfluo-sulfonate acid ionic membrane after chemical regeneration can be recyclable for perfluo-sulfonic acid resin.

关 键 词：正交优选法 废弃全氟磺酸离子膜 离子交换容量(IEC) 化学再生 

分 类 号：X703[环境科学与工程—环境工程]