利用双极膜电渗析实现ZSM-5分子筛清洁化生产的研究

摘要

Sodium removal process of ZSM-5 zeolite was studied by bipolar membrane electrodialysis (EDBM).The results indicate that the zeolite with Na2 O content less than 0.1 ％00 can be obtained by ED-BM,meanwhile Si,Na and part of template agent can be recycled.The EDBM zeolite is equal to the ZSM-5 zeolite by NH4+ exchange method both in physicochemical properties and catalytic performance.The new process is eco-friendly with no ammonia or salty wastewater emission,and the water can be reused.%以双极膜电渗析为离子交换装置,对ZSM-5分子筛的脱钠过程进行研究.结果表明,双极膜电渗析工艺用于ZSM-5分子筛脱钠过程,可以达到分子筛中Na2O质量分数低于0.1％的工业要求,同时能够回收Si、Na和部分模板剂,实现资源再利用.电渗析与铵交换制得的H-ZSM-5分子筛相比较,物化性质和催化性能基本一致,工艺过程清洁环保,水可循环利用,且无氨氮、无含盐废水排放.