纳米β沸石的改性  

Modification of Nanocrystalline β-Zeolite

作　　者：谷明镝[1] 黄薇[1] 姜虹[1] 尹泽群[1] 

机构地区：[1]中国石油化工股份有限公司抚顺石油化工研究院,辽宁抚顺113001

出　　处：《当代化工》2012年第4期331-332,365,共3页Contemporary Chemical Industry

摘　　要：采用水热处理和酸处理等方法对纳米β沸石进行改性,考察纳米β沸石的性质变化。结果表明,Na2O含量越低,水热处理后结晶度越高,热稳定性就越好;酸处理在低浓度时以酸洗掉非骨架铝为主,而高浓度酸时不仅脱除非骨架铝,而且还脱除骨架铝;纳米β沸石较难提高硅铝比,达到相同硅铝比时比小晶粒β沸石所需条件要苛刻,其耐酸性能好于小晶粒β沸石。Nanocrystalline β-zeolite was modified by using hydrothermal treatment and acid treatment methods;property change of nanocrystalline β-zeolite after the modification was investigated.The results show that the lower Na2O content,the higher the crystallinity and the better the thermal stability after hydrothermal treatment;only non-framework aluminum can be washed out when using low concentration acid,both non-framework aluminum and framework aluminum can be washed out when using high concentration acid;it is difficult to improve the Si/Al ratio of nanocrystalline β-zeolite.To achieve the same Si/Al ratio,the nanocrystalline β-zeolite requires harsher conditions than small grain β zeolite.The acid resistance of nanocrystalline β-zeolite is better than that of small grain β-zeolite.

关 键 词：Β沸石 纳米 改性 

分 类 号：TQ424.25[化学工程]