从风化岩残积土固废中回收高岭土及制备ZSM-5分子筛的研究

Investigation on Recycling of Kaolin from Solid Waste in Weathered Rock and Preparation of ZSM-5 Molecular Sieve

摘要: 以广东省惠州市某矿山风化花岗岩残积土固体废弃物为原料，采用水热法合成了ZSM-5分子筛。首先采用水力旋流器回收风化岩中的高岭土，并采用还原—络合法对其进行化学除铁。然后对除铁后的高岭土进行热活化处理，以TPAOH为模板剂，水热法合成了ZSM-5分子筛。采用TEM、XRD和N₂吸附—脱附法对样品进行了表征，结果表明，合成的ZSM-5分子筛结晶度好，孔道规整，具有一定的介孔结构。

Abstract: ZSM-5 molecular sieve was synthesized by water heat from a weathered rock in Huizhou, Guangdong Province。Firstly, the kaolin from the weathered rock was recovered by beneficiation. Reduction-complexation method was used to chemically remove iron from it. Next the kaolin was thermally activated and ZSM-5 molecular sieve was synthesized by hydrothermal method using TPAOH as a template. The samples were characterized by TEM, XRD and N₂ adsorption-desorption. The results showed that the ZSM-5 molecular sieve had a certain mesoporous structure, good crystallinity and regular pores.