ZEOLITE ZSM 12A method of preparing a zeolite ZSM-12 type crystal which comprises crystallizing substantially pure ZSM-12 from a silica and optionally alumina gel mixture in the presence of a methyltriethylammonium cation, and the ZSM-12 product produced thereby.POCHEN CHU...
Mesoporous ZSM-12 zeolite was prepared by dual template in-situ method, desilication in alkaline medium and zeolite as silica source method. 本文分别用双模板剂原位合成法、碱脱硅改性法和微孔沸石硅源法合成了具有介孔结构的ZSM-12分子筛,并采用XRD,XRF,N2物理吸附,27Al NMR,29Si NMR,SEM,TEM,TG,...
Preparation of zeolite zsm-12 Preparation of zeolite ZSM-12Mae Koenig Rubin
A crystalline zeolite designated ZSM -12 having the following composition expressed as mole ratios of oxides: 1.0 卤 0.4 M/n OWO20-100 YOZHO where M is at least one cation and n is the valence thereof, W is aluminum or gallium, Y is silicon or germanium, and Z is a value ranging ...
关键词：无溶剂法；快速合成；ZSM-12分子筛；晶种；硅铝前体 中图分类号：O611.4 文献标志码：A 文章编号：1000-6613（2023）07-3561-11Solvent-free rapid synthesis of ZSM-12 zeolite WANG Shuaiqi 1，2，WANG Congxin 1，WANG Xuelin 1，2，TIAN Zhijian 1 (1 Dalian Institute of Chemical...
Three MTW (H-ZSM-12) zeolite samples were synthesized by (i) direct hydrothermal method, (ii) desilication of the hydrothermal obtained product and (iii) mesostructuration of zeolite ZSM-12 seeds in the presence of hexadecyltrimethylammonium bromide. The samples were characterized by XRD, nitroge...
ZSM-12Silica with 98% purity was prepared from rice husk by acid leaching and used as a silica source for the syntheses of zeolite beta (Beta) under hydrothermal conditions with gel Si/Al ratios of 8, 13, 15, 20, 50, 100, 150, and 200. Based on powder X-ray diffraction patterns, ...
Heavy oils are subjected to catalytic cracking in the absence of added hydrogen using a catalyst containing a zeolite having the structure of ZSM-12 and a large-pore crystalline zeolite having a Constraint Index less than about 1. The process is able to effect a bulk conversion of the oil ...
When it comes to the olefin-based cycle, olefins can diffuse freely inside these two zeolites with methoxide intermediates bound to the zeolite frameworks, which thus facilitates formation of longer-chain olefin through olefin methylation reaction in these two zeolite catalysts. The combination of the...
Nitrogen sorption revealed strong influence of the desilication process on the pore structure of modified materials—the mesopores system was formed in the zeolite crystals. Finally, catalytic studies were carried out using ZSM-5, ZSM-12, MCM-22, their desilicated derivatives and a ZSM-12/MCM-...