title: Selective Chlorination of Toluene to p-Chlorotoluene Catalyzed by Nanosized Zeolite K-L Catalysts.
abstract: Nanosized zeolite K-L catalysts were synthesized by the hydrothermal method starting from silica sol and potassium aluminate. The crystallinities of the zeolite K-L catalysts increased with increasing the SiO2/Al2O3 mole ratio of reaction solution and prolonging the autoclaving time. Nanosized and well-dispersed zeolite K-L catalysts were synthesized when the SiO2/Al2O3 mole ratio was more than 26:1. Well-crystallized and nanosized zeolite K-L catalysts showed high catalytic activity for the chlorination of toluene to p-chlorotoluene. When the nanosized zeolite K-L catalyst was synthesized with the SiO2/Al2O3 mole ratio of 31:1 at the autoclaving temperature of 150 °C for 96 h, the selectivities of p-chlorotoluene and o-chlorotoluene were 76.2% and 20.0%, respectively, at the complete conversion of toluene.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhu
authors.forename: Yujun
authors.initials: Y
authors.lastname: Fu
authors.forename: Hengbo
authors.initials: H
authors.lastname: Yin
authors.forename: Yonghai
authors.initials: Y
authors.lastname: Feng
authors.forename: Lingqin
authors.initials: L
authors.lastname: Shen
authors.forename: Aili
authors.initials: A
authors.lastname: Wang
authors.forename: Jitai
authors.initials: J
authors.lastname: Li
authors.forename: Wenxiu
authors.initials: W
authors.lastname: Ni
authors.forename: Xulan
authors.initials: X
authors.lastname: Xie