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为了有效利用钾长石资源,以碳酸钾碱熔活化钾长石作为原料,采用水热合成法在K2O--Al2O3--SiO2--TPABr--H2O体系中合成K-ZSM-5分子筛。通过X射线衍射、扫描电子显微镜和红外光谱考察了原料焙烧比、晶化温度和时间、水量和补加硅量、模板剂等因素对K-ZSM-5分子筛合成的影响。结果表明,以K2CO3助熔焙烧分解钾长石,在钾长石与K2CO3质量比为1∶1.0~2.0,130~180℃范围内均能合成出K-ZSM-5分子筛;增大K2CO3的用量、改变晶化温度或改变合成体系中的水量和硅量均可使晶体形貌和大小发生变化。合成K-ZSM-5分子筛的母液能够实现循环利用。
In order to make effective use of potash feldspar resources, K - ZSM - 5 zeolite was synthesized by hydrothermal method using potassium carbonate alkali - activated K - feldspar as raw material. The effects of roasting ratio, crystallization temperature and time, amount of water and amount of added silicon, template agent and other factors on the synthesis of K-ZSM-5 molecular sieve were investigated by X-ray diffraction, scanning electron microscopy and infrared spectroscopy. The results show that K-ZSM-5 zeolite can be synthesized by K2CO3 roasting calcination, K-ZSM-5 zeolite can be synthesized in the range of potassium feldspar and K2CO3 mass ratio of 1: 1.0-2.0,130-180 ℃; , Changing the crystallization temperature or changing the amount of water and silicon in the synthesis system all can change the crystal morphology and size. The mother liquor of synthetic K-ZSM-5 zeolite can be recycled.