沸石分子筛脱除芳烃中微量烯烃的研究

Removal of trace olefins in aromatics by zeolites

采用稀土元素La改性的沸石分子筛催化剂对芳烃中的烯烃杂质进行深度脱除。实验结果表明,催化剂采用机械混合法最佳;对于Z型分子筛,稀土元素La的最佳添加质量分数为10%,初活性和寿命都有较大提高。用红外光谱法对制得的催化剂进行了表征。

Deep removal of olefins in aromatics over rare-earth （La） modified zeolites was studied. The results indicated that mechanical mixing was an appropriate way for the zeolite preparation; for Z zeolites, the optimum mass fraction for doping of rare earth La was 10%, with enhanced initial activity and service life. The catalysts were characterized by IR.