Diquaternary (CH_3)_2(C_2H_5)N~+(CH_2)_nN~+(C_2H_5)(CH_3)_2 and (C_2H_5)_2-(CH_3)N~+(CH_2)_nN~+(CH_3)(C_2H_5)_2 ions with n=4-6 as structure-directing agents in zeolite synthesis

摘要

The use of flexible,linear diquaternary alkylammonium ions (CH_3)_2(C_2H_5)N(CH_2)_nN-(C_2H_5)(CH_3)_2 (Me_4Et_2-diquat-n) and (C_2H_6)_2(CH_3)N~+(CH_2)_nN~+(CH_3)(C_2H_5)_2(Et_4Me_2-diquat-n) with n=4-6 as structure-directing agents in zeolite syntheses is described.Among the ammonium ions studied here,the Et_4Me_2-diquat-4 and Et_4Me_2-diquat-6 ions were found to be new structure-directing agents for the crystallization of MCM-47 and SSZ-16,respectively.