Direct amination of isobutylene over zeolite catalysts with various topologies and acidities

Direct amination of isobutylene over zeolite catalysts with various topologies and acidities

Shangyao Gao;Longya Xu;Xiangxue Zhu;Xiujie Li;Yuzhong Wang;Sujuan Xie;Songwei Du;Fucun Chen;Peng Zeng;Shenglin Liu

【期刊名称】《天然气化学（英文版）》 【年(卷),期】2017(026)004

【摘要】The atomically economic and green chemical reaction of direct amination of isobutylene to tertbutylamine,particularly under the relative mild reaction conditions available for future industrial use,was carried out over zeolite catalysts possessing different topological structures,from one dimensional to three dimensional pore system,and from small 8-member ring pore (MRP) to medium 10 MRP and further to large 12 MRP zeolites,to disclose the relationship between the zeolite properties/topologies and their amination performance systematically under the mild reaction conditions.It was discovered that the pore structure and the acidities of zeolite catalysts played crucial roles in the isobutylene amination process,and suitable pore diameter (larger than 0.5 nm or with large side pockets/cups in the outside surface) and a certain number of mid-strong acid sites are indispensable to catalyze the amination reaction,while too strong acid strength was not conducive to the process of isobutylene amination.Among them,zeolites with topologies of BEA,MFI,MEL,MWW and EUO exhibited good