钛硅分子筛催化双氧水氧化水中间甲酚

探索催化双氧水氧化去除间甲酚对开发炼油厂碱渣废水处理新技术意义重大。采用钛硅分子筛催化双氧水氧化水中间甲酚,考察了反应时间、反应温度、双氧水加入量、催化剂加入量和初始溶液pH对间甲酚去除率的影响。实验结果表明：钛硅分子筛对双氧水氧化间甲酚具有显著的催化作用;在反应时间为90 min、反应温度为80 ℃、n（H₂O₂）∶n（间甲酚）为4、催化剂加入量为1.5 g/L、初始溶液pH为1.0~11.0的条件下,间甲酚去除率约为94%,间甲酚溶液的BOD₅/COD从氧化前的0.26提高到氧化后的0.38,可生化性显著提高。

Synthesis of Zeolite from Fly Ash by Alkali Melting Process

Zeolite was synthesized from fly ash by alkali melting process.The expenimental results show that the affecting factors follow the order of calcination temperature>m(NaOH):m(coal fly ash)>calcination time.The optimum process conditions are as follows:calcination temperature 650 ℃,calcination time 60 min,m(NaOH):m(coal fly ash)=1.2.The ammonia nitrogen removal rate on the zeolite synthesized from fly ash under these conditions is 69.3%.The XRD and SEM results show that:After melting,the crystal structure of the original inert materials such as quartz and mullite are effectively destructed and the activity of fly ash is improved;The melted coal fly ash lost its original spherical shape and took the form of dispersive fly ash clinker.