论文部分内容阅读
利用高铁钾长石粉体水热合成13X型分子筛,对晶化过程进行表征,确定了晶化过程的诱导期、晶化期和沸石生长速率。结果显示,与低铁合成体系对比,高铁合成体系中反应物料的陈化期及晶化早期反应产物的红外结构、化学组成更接近于13X型分子筛的红外结构和化学组成,即反应物更易于向13X型分子筛结构转变;13X型分子筛开始形成的时间更早,晶化过程的诱导期和晶化期时间缩短。与低铁合成体系一样,高铁体系水热合成13X型分子筛,晶体成核与生长主要发生在凝胶相内部,是凝胶结构逐步趋于有序化的过程。
Hydrothermal synthesis of 13X zeolite from high-speed iron potassium feldspar powder was used to characterize the crystallization process. The induction period, crystallization period and zeolite growth rate were determined. The results show that compared with the low-iron synthesis system, the infrared structure and chemical composition of the reaction materials in the high-speed iron synthesis system and the early crystallization products of the high-speed iron synthesis system are closer to the infrared structure and chemical composition of the 13X type molecular sieve, 13X molecular sieve structure transition; 13X zeolite began to form earlier, the crystallization process of induction and crystallization time shortened. Like the low-iron synthesis system, the 13X-type molecular sieve hydrothermally synthesized by high-speed iron system, the nucleation and growth of crystal mainly occur in the gel phase, and the gel structure gradually tends to be ordered.