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利用双极膜电渗析实现ZSM-5分子筛清洁化生产的研究
CLEAN PRODUCTION OF ZSM-5 MOLECULAR SIEVE BY BIPOLAR MEMBRANE ELECTRODIALYSIS
【摘要】 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。
【Abstract】 Sodium removal process of ZSM-5 zeolite was studied by bipolar membrane electrodialysis( EDBM). The results indicate that the zeolite with Na2O content less than 0. 1% can be obtained by EDBM,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 ecofriendly with no ammonia or salty wastewater emission,and the water can be reused.
【关键词】 双极膜电渗析;
脱钠;
回收;
模板剂;
【Key words】 bipolar membrane electrodialysis; removal of sodium; recovery; template;
【Key words】 bipolar membrane electrodialysis; removal of sodium; recovery; template;
【基金】 国家高技术研究发展计划(863计划)项目(2015AA03A601)
- 【文献出处】 石油炼制与化工 ,Petroleum Processing and Petrochemicals , 编辑部邮箱 ,2017年02期
- 【分类号】TQ424.25
- 【被引频次】1
- 【下载频次】193