1，12－烷基二胺－Na_2O－SiO_2－Al_2O_3－H_2O系统中ZSM

SYNTHESIS OF ZSM-11(SILICALITE-Ⅱ) IN 1,12-DIAMINODODECANE-Na_2O-Al_2O_3-SiO_2-H_2O SYSTEM AND ITS IDENTIFICATION

以硅溶胶为硅源．在０．３０１，１２－烷基二胺－ＸＮａ２Ｏ－ＹＡｌ２Ｏ３－ＳｉＯ２－ＺＨ２Ｏ体系中，研究ＺＳＭ—１１沸石于１６０～２００℃区间的水热结晶．用ＸＲＤ鉴定产物．合成纯相ＺＳＭ－１１的反应物配比是Ｘ＝０．０５；Ｙ＝０～０．０１１；Ｚ＝４０．其反应温度为１６０～１８０℃．加入ＺＳＭ－１１晶种或添加ＮａＦ可加快结晶速度，导致ＺＸＳ－１１（ｓｉｌｉｃａｌｉｔｅ－Ⅱ）柱状单晶的生成．该单晶的最大尺寸可达２０×２０×６０μｍ．

Hydrothermal synthesis of zeolite ZSM-11 (silicalite-Ⅱ) was investigated in a system of0.30 1,12-diaminododccane-X Na2O-Y Al2O3-SiO2-Z H2O in the temperature range 160～200℃ with silica sol as silicon source and using XRD for identification. The optimum reactionmolar composition for producing pure ZSM-11 were X=0.05, Y=0～0.05, Z = 40 and tcmperature range was 160～180℃. Seeding of ZSM-11 or adding NaF can accelerate crystallizationof ZSM-11 (silicalite-Ⅱ) and led to form silicalite-Ⅱ Prismy single crystals 20×20 ×60μm insize, which gave a very strong characteristic (h00) diffraction in XRD pattern. TheZSM-5 / 11-a intermediate of ZSM-5 and ZSM-11, zeolite ZBM-30(EU-2) and SiO2 densephase-quartz and cristobalitc were observed in the system.