CAJ | 학술논문

为了探索NaA型小晶粒沸石分子筛的大规模生产方式，以偏高岭石水热转化法合成的NaA型沸石分子筛为原料、NaCl为助磨剂，采用研磨法进行了小晶粒NaA分子筛制备试验，用SEM、BET和激光粒度分析仪对研磨前后样品的形貌、粒度分布及比表面积进行了表征，并测定了研磨前后样品的钙离子交换容量。结果表明，在转速为400 r/min、NaCl与NaA质量比为12∶1、球料质量比为7∶1、研磨时间为7 h的条件下，可将标称粒径为3μm、比表面积为12．306 m2/g、镉离子交换容量为294 mg/g的NaA分子筛研磨至平均粒度为0．98μm、比表面积为27．997 m2/g、镉离子交换容量为352 mg/g的小晶粒NaA分子筛。因此，干法研磨工艺是小晶粒NaA分子筛大规模生产的易操作、低成本新工艺。
위료탐색NaA형소정립비석분자사적대규모생산방식，이편고령석수열전화법합성적NaA형비석분자사위원료、NaCl위조마제，채용연마법진행료소정립NaA분자사제비시험，용SEM、BET화격광립도분석의대연마전후양품적형모、립도분포급비표면적진행료표정，병측정료연마전후양품적개리자교환용량。결과표명，재전속위400 r/min、NaCl여NaA질량비위12∶1、구료질량비위7∶1、연마시간위7 h적조건하，가장표칭립경위3μm、비표면적위12．306 m2/g、력리자교환용량위294 mg/g적NaA분자사연마지평균립도위0．98μm、비표면적위27．997 m2/g、력리자교환용량위352 mg/g적소정립NaA분자사。인차，간법연마공예시소정립NaA분자사대규모생산적역조작、저성본신공예。
In order to investigate the method to produce NaA molecular sieve in large scale,the fine-crystal NaA molecu-lar sieve was prepared by grinding method using NaA zeolite as raw materials and NaCl as grinding aids. The phase composi-tion,morphology,particle distribution and surface area of NaA molecular sieve before and after grinding were characterized by SEM,BET,and Laser Particle Size Analyzer,and Cd2+ exchange capacity was determined. The results showed that the particle size of NaA molecular sieve was decreased from 3 μm to 0. 98 μm,the surface area was increased from 12. 306 m2/g to 27. 997 m2/g,and Cd2+exchange capacity was enhanced from 294 mg/g to 352 mg/g after grinding under conditions of rotating speed 400 r/min,w(NaCl) ∶ w(NaA) of 12 ∶ 1,mass ratio between ball and powder 7 ∶ 1 for 7 h. Therefore,the dry grinding method is a novel method for mass production of NaA molecular sieve,with easy operating and low cost.