KL zeolite was hydrothermal dealuminated to increase the acidity of zeolite;some of the potassium ions in KL zeolite were removed by ion-exchange method to decrease the basicity of zeolite.

• 摘要 采用水热脱铝法提高硅铝比使L分子筛的酸性增强，采用离子交换法脱除KL分子筛上部分的K使分子筛的碱性降低。